Water providers
Who serves whom, from what, and where. Every active public water
system Colorado reports to EPA, with its source type, the counties it
serves, the water district its service area sits in, and the systems
it buys water from or sells to. Boundaries are EPA's; most are
modelled, and each page says which.
1,108
community systems
7.2 M
people served (double-counts wholesale)
470
on surface water
638
on groundwater
346
buy their water
724
with a boundary (450 modelled)
Service areas from EPA's Community Water System boundaries (v3, 2026); blue is a traced boundary, amber a modelled one. Click an area for the system.
Community systems, largest first
| System | Serves | Source | Counties | Water district |
|---|---|---|---|---|
| DENVER WATER BOARD | 1,287,000 | Surface water | Denver | South Platte Cheesman to Denver Gage |
| AURORA CITY OF | 533,407 | Surface water | Arapahoe | South Platte: Denver Gage to Greeley |
| COLORADO SPRINGS UTILITIES | 464,111 | Surface water | El Paso | Fountain Creek |
| THORNTON CITY OF | 226,465 | Surface water | Adams | South Platte: Denver Gage to Greeley |
| WESTMINSTER CITY OF | 202,078 | Surface water | Adams | South Platte: Denver Gage to Greeley |
| FT COLLINS CITY OF | 179,901 | Surface water | Larimer | Cache La Poudre River |
| ARVADA CITY OF | 171,610 | Surface water | Jefferson | Clear Creek |
| BOULDER CITY OF | 166,080 | Surface water | Boulder | Boulder Creek |
| GREELEY CITY OF | 132,310 | Surface water | Weld | Cache La Poudre River |
| PUEBLO BOARD OF WW | 114,070 | Surface water | Pueblo | Fountain Creek |
| CASTLE ROCK TOWN OF | 110,298 | Surface water | Douglas | South Platte Cheesman to Denver Gage |
| BROOMFIELD CITY AND COUNTY OF | 106,153 | Surface water | Boulder Creek | |
| LONGMONT CITY OF | 104,178 | Surface water | Boulder | St. Vrain Creek |
| HIGHLANDS RANCH WSD | 103,444 | Surface water | Douglas | South Platte Cheesman to Denver Gage |
| UTE WCD | 92,580 | Surface water | Mesa | Lower Colorado River |
| LOVELAND CITY OF | 91,077 | Surface water | Larimer | Big Thompson River |
| CONSOLIDATED MUTUAL MAPLE GROVE | 81,400 | Surface water | Jefferson | South Platte Cheesman to Denver Gage |
| PARKER WSD | 75,949 | Surface water | Douglas | South Platte Cheesman to Denver Gage |
| SOUTH ADAMS COUNTY WSD | 75,559 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| EAST CHERRY CREEK VALLEY WSD | 66,130 | Purchased surface water | Arapahoe | South Platte: Denver Gage to Greeley |
| FT COLLINS LOVELAND WD | 63,532 | Purchased surface water | Larimer | Cache La Poudre River |
| ENGLEWOOD CITY OF | 57,332 | Surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| BRIGHTON CITY OF | 56,304 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| SOUTHGATE WSD | 55,000 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| EAGLE RIVER WSD | 51,515 | Surface water | Eagle | Eagle River Basin |
| GREEN MOUNTAIN WSD | 49,400 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| NORTHGLENN CITY OF | 48,927 | Surface water | Adams | South Platte: Denver Gage to Greeley |
| SOUTHWEST METROPOLITAN WSD | 48,648 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| US DEPARTMENT OF THE ARMY FORT CARSON | 48,000 | Purchased surface water | El Paso | Fountain Creek |
| ERIE TOWN OF | 47,444 | Surface water | Boulder | Boulder Creek |
| BANCROFT CLOVER WSD | 44,000 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| GOLDEN CITY OF | 38,288 | Surface water | Jefferson | Clear Creek |
| CANON CITY CITY OF | 34,800 | Surface water | Fremont | Arkansas: Salida to Portland |
| CLIFTON WD | 34,500 | Surface water | Mesa | Lower Colorado River |
| DURANGO CITY OF | 33,787 | Surface water | La Plata | Animas River Basin |
| ASPEN CITY OF | 31,100 | Surface water | Pitkin | Roaring Fork River Basin |
| ARAPAHOE CNTY WWWA | 31,000 | Groundwater | Arapahoe | South Platte Cheesman to Denver Gage |
| BEAR CREEK WSD | 30,000 | Purchased surface water | Jefferson | Bear Creek |
| PUEBLO WEST MD | 30,000 | Surface water | Pueblo | Fountain Creek |
| CHEROKEE MD | 29,610 | Groundwater | El Paso | Fountain Creek |
| LAFAYETTE CITY OF | 28,700 | Surface water | Boulder | Boulder Creek |
| BRECKENRIDGE TOWN OF | 28,315 | Surface water | Summit | Blue River Basin |
| EAST LARIMER COUNTY WD | 27,944 | Purchased surface water | Larimer | Cache La Poudre River |
| FIRESTONE TOWN OF | 27,798 | Purchased surface water | Weld | St. Vrain Creek |
| WIDEFIELD WSD | 27,640 | Purchased surface water | El Paso | Fountain Creek |
| CSU MAIN AND WEST HOUSING CAMPUS | 27,375 | Purchased surface water | Larimer | Cache La Poudre River |
| JOHNSTOWN TOWN OF | 27,295 | Surface water | Weld | Big Thompson River |
| GRAND JUNCTION CITY OF | 26,000 | Surface water | Mesa | Lower Colorado River |
| LITTLE THOMPSON WD | 25,654 | Purchased surface water | Larimer | Big Thompson River |
| FOUNTAIN CITY OF | 25,130 | Purchased surface water | El Paso | Fountain Creek |
| CRESTVIEW WSD | 23,756 | Purchased surface water | Adams | Clear Creek |
| WINDSOR TOWN OF | 23,500 | Purchased surface water | Weld | Cache La Poudre River |
| MERIDIAN MD | 23,415 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| CHERRY CREEK VALLEY WSD | 22,000 | Purchased surface water | Denver | South Platte Cheesman to Denver Gage |
| LOUISVILLE CITY OF | 20,975 | Surface water | Boulder | Boulder Creek |
| TRI COUNTY WCD | 20,490 | Purchased surface water | Montrose | no boundary on file |
| LEFT HAND WD | 20,280 | Surface water | Boulder | Boulder Creek |
| SECURITY WATER DISTRICT | 20,000 | Purchased surface water | El Paso | Fountain Creek |
| WHEAT RIDGE WATER DISTRICT | 20,000 | Purchased surface water | Jefferson | Clear Creek |
| PLATTE CANYON WSD | 19,485 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| EVANS CITY OF | 19,369 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| MONTROSE CITY OF | 19,305 | Purchased surface water | Montrose | Lower Uncompahgre River |
| MT WERNER WD | 19,000 | Surface water | Routt | Upper Yampa River |
| WILLOWS WD | 19,000 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| WOODMOOR WSD | 18,031 | Surface water | El Paso | Fountain Creek |
| SUPERIOR MD NO 1 | 17,900 | Surface water | Boulder | Boulder Creek |
| FREDERICK TOWN OF | 17,173 | Purchased surface water | Weld | St. Vrain Creek |
| US AIR FORCE ACADEMY | 16,876 | Purchased surface water | El Paso | Fountain Creek |
| ESTES PARK TOWN OF | 16,722 | Surface water | Larimer | Big Thompson River |
| NORTH WELD COUNTY WD | 15,890 | Purchased surface water | Weld | South Platte: Greeley to Balzac |
| EVERGREEN MD | 15,750 | Surface water | Jefferson | Bear Creek |
| STONEGATE MD | 15,295 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| GYPSUM TOWN OF | 15,272 | Surface water | Eagle | Eagle River Basin |
| BLACK HAWK CITY OF | 15,167 | Surface water | Gilpin | Clear Creek |
| STERLING CITY OF | 15,100 | Groundwater under the influence of surface water | Logan | South Platte: Balzac to Stateline |
| NORTH WASHINGTON STREET WSD | 14,500 | Purchased surface water | Adams | Clear Creek |
| BERTHOUD TOWN OF | 14,211 | Surface water | Larimer | Big Thompson River |
| WOODMEN HILLS MD | 13,888 | Groundwater | El Paso | Fountain Creek |
| MONTEZUMA WC | 13,797 | Surface water | Montezuma | McElmo Creek Basin |
| ROXBOROUGH WSD | 13,765 | Surface water | Douglas | South Platte Cheesman to Denver Gage |
| PINERY WWD | 12,901 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| CASTLE PINES NORTH MD | 12,800 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| MERIDIAN SERVICE MD | 12,760 | Groundwater | El Paso | Fountain Creek |
| FT LUPTON CITY OF | 12,099 | Surface water | Weld | South Platte: Denver Gage to Greeley |
| FT MORGAN CITY OF | 12,000 | Surface water | Morgan | South Platte: Greeley to Balzac |
| KEN CARYL WSD | 12,000 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| LAKEHURST WSD | 12,000 | Purchased surface water | Jefferson | Bear Creek |
| SEVERANCE TOWN OF | 11,733 | Purchased surface water | Weld | Cache La Poudre River |
| WELLINGTON TOWN OF | 11,720 | Surface water | Larimer | Cache La Poudre River |
| FEDERAL HEIGHTS CITY OF | 11,678 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| STERLING RANCH CAB | 11,501 | Purchased surface water | Douglas | no boundary on file |
| TRINIDAD CITY OF | 11,400 | Surface water | Las Animas | Purgatoire River |
| ALAMOSA CITY OF | 11,271 | Groundwater | Alamosa | Rio Grande |
| PAGOSA AREA WSD | 11,069 | Surface water | Archuleta | Piedra River Basin |
| COTTONWOOD WSD | 10,867 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| IDAHO SPRINGS CITY OF | 10,432 | Surface water | Clear Creek | Clear Creek |
| NORTH TABLE MOUNTAIN WSD | 10,000 | Surface water | Jefferson | Clear Creek |
| VALLEY WD | 10,000 | Purchased surface water | Jefferson | Clear Creek |
| STEAMBOAT SPRINGS CITY OF | 9,950 | Purchased surface water | Routt | Upper Yampa River |
| SNAKE RIVER WD | 9,900 | Groundwater | Summit | Blue River Basin |
| MORRISON TOWN OF | 9,887 | Surface water | Jefferson | Bear Creek |
| MOUNTAIN VILLAGE TOWN OF | 9,700 | Groundwater | San Miguel | San Miguel River Basin |
| ST CHARLES MESA WD | 9,690 | Surface water | Pueblo | Saint Charles |
| GUNNISON CITY OF | 9,610 | Groundwater | Gunnison | East River Basin |
| RIFLE CITY OF | 9,489 | Surface water | Garfield | Rifle/Elk/Parachute Creeks |
| GLENWOOD SPRINGS CITY OF | 9,428 | Surface water | Garfield | Roaring Fork River Basin |
| WILLOWBROOK WSD | 9,348 | Purchased surface water | Jefferson | Bear Creek |
| CHERRY CREEK VILLAGE WD | 9,215 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| MILLIKEN TOWN OF | 9,200 | Purchased surface water | Weld | Big Thompson River |
| CRAIG CITY OF | 8,930 | Surface water | Moffat | Lower Yampa River |
| CORTEZ CITY OF | 8,770 | Surface water | Montezuma | McElmo Creek Basin |
| DELTA CITY OF | 8,700 | Purchased surface water | Delta | North Fork/Tribs. |
| WOODLAND PARK CITY OF | 8,500 | Surface water | Teller | South Platte Cheesman to Denver Gage |
| SILVERTHORNE TOWN OF | 8,400 | Groundwater | Summit | Blue River Basin |
| LA JUNTA CITY OF | 8,320 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| INVERNESS WSD | 8,140 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| MORGAN COUNTY QUALITY WD | 8,116 | Purchased surface water | Morgan | South Platte: Greeley to Balzac |
| TELLURIDE TOWN OF | 7,900 | Surface water | San Miguel | San Miguel River Basin |
| CENTRAL WELD CNTY WD | 7,662 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| EAGLE TOWN OF | 7,511 | Surface water | Eagle | Eagle River Basin |
| FLORENCE CITY OF | 7,500 | Surface water | Fremont | Arkansas: Salida to Portland |
| LAMAR CITY OF | 7,500 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| PARKVILLE WD | 7,500 | Surface water | Lake | Arkansas: Headwaters to Salida |
| TODD CREEK VILLAGE MD | 7,363 | Groundwater under the influence of surface water | Adams | South Platte: Denver Gage to Greeley |
| EATON TOWN OF | 7,328 | Purchased surface water | Weld | Cache La Poudre River |
| MANITOU SPRINGS CITY OF | 6,938 | Surface water | El Paso | Fountain Creek |
| DACONO CITY OF | 6,900 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| CARBONDALE TOWN OF | 6,700 | Surface water | Garfield | Roaring Fork River Basin |
| WINTER PARK WSD | 6,635 | Surface water | Grand | Upper Colorado/Fraser Rivers |
| LOCHBUIE TOWN OF | 6,518 | Groundwater | Weld | South Platte: Denver Gage to Greeley |
| STRATMOOR HILLS WSD | 6,500 | Purchased surface water | El Paso | Fountain Creek |
| DONALA WSD | 6,421 | Purchased surface water | El Paso | Fountain Creek |
| SNOWMASS VILLAGE WSD | 6,353 | Surface water | Pitkin | Roaring Fork River Basin |
| NORTHERN DOUGLAS COUNTY WSD | 6,160 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| LAKEWOOD CITY OF | 6,000 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| COPPER MOUNTAIN CONSOLIDATED MD | 5,785 | Groundwater | Summit | Blue River Basin |
| MONUMENT TOWN OF | 5,740 | Groundwater | El Paso | Fountain Creek |
| TRIVIEW MD | 5,737 | Purchased surface water | El Paso | Fountain Creek |
| SALIDA CITY OF | 5,666 | Surface water | Chaffee | Arkansas: Headwaters to Salida |
| CASTLE PINES VILLAGE MD | 5,656 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| GRAND COUNTY WATER NO 1 | 5,400 | Surface water | Grand | Upper Colorado/Fraser Rivers |
| GEORGETOWN TOWN OF | 5,315 | Surface water | Clear Creek | Clear Creek |
| EDGEWATER CITY OF | 5,300 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| BRUSH CITY OF | 5,122 | Groundwater | Morgan | South Platte: Greeley to Balzac |
| LIMON TOWN OF | 5,080 | Groundwater | Lincoln | Arkansas: Las Animas to Stateline |
| NEW CASTLE TOWN OF | 5,024 | Surface water | Garfield | Rifle/Elk/Parachute Creeks |
| PAINT BRUSH HILLS | 4,994 | Groundwater | El Paso | Fountain Creek |
| NORTHERN COLORADO WA | 4,675 | Purchased surface water | Larimer | Cache La Poudre River |
| KEENESBURG TOWN OF | 4,650 | Groundwater | Weld | South Platte: Greeley to Balzac |
| MONTE VISTA CITY OF | 4,600 | Groundwater | Rio Grande | Rio Grande |
| MID VALLEY MD | 4,588 | Groundwater | Eagle | Roaring Fork River Basin |
| ELIZABETH TOWN OF | 4,523 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| MENOKEN WD | 4,500 | Purchased surface water | Montrose | Lower Uncompahgre River |
| FRISCO TOWN OF | 4,495 | Surface water | Summit | Blue River Basin |
| ROCKY FORD CITY OF | 4,443 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| BENNETT TOWN OF | 4,400 | Groundwater | Adams | South Platte: Greeley to Balzac |
| GLENDALE CITY OF | 4,400 | Purchased surface water | South Platte Cheesman to Denver Gage | |
| AULT TOWN OF | 4,220 | Purchased surface water | Weld | Cache La Poudre River |
| BATTLEMENT MESA MD | 4,100 | Surface water | Garfield | Divide Creek |
| YUMA CITY OF | 4,049 | Groundwater | Yuma | Arikaree River |
| HIGH VIEW WD | 4,000 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| PARK CENTER WD | 4,000 | Surface water | Fremont | Arkansas: Salida to Portland |
| WEST FORT COLLINS WD | 4,000 | Purchased surface water | Larimer | Cache La Poudre River |
| HAYDEN TOWN OF | 3,982 | Surface water | Routt | Middle Yampa River |
| GENESEE WSD | 3,920 | Surface water | Jefferson | Bear Creek |
| PERRY PARK WSD | 3,890 | Groundwater under the influence of surface water | Douglas | South Platte Cheesman to Denver Gage |
| CHIPETA WD | 3,802 | Purchased surface water | Montrose | Lower Uncompahgre River |
| BUENA VISTA TOWN OF | 3,776 | Groundwater under the influence of surface water | Chaffee | Arkansas: Headwaters to Salida |
| CENTRAL CITY CITY OF | 3,750 | Surface water | Gilpin | Clear Creek |
| YMCA ROCKIES WIND RIVER | 3,730 | Purchased surface water | Larimer | Big Thompson River |
| BURLINGTON CITY OF | 3,720 | Groundwater | Kit Carson | Republican River |
| COLORADO CENTRE MD | 3,675 | Groundwater | El Paso | Fountain Creek |
| SILT TOWN OF | 3,536 | Surface water | Garfield | Rifle/Elk/Parachute Creeks |
| ADVENIR FRENCH QUARTER wholesaler | 3,447 | Purchased surface water | no boundary on file | |
| HUDSON TOWN OF | 3,350 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| MOUNT CRESTED BUTTE WSD | 3,296 | Surface water | Gunnison | East River Basin |
| MEADOWBROOK WD | 3,290 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| DILLON TOWN OF | 3,254 | Surface water | Summit | Blue River Basin |
| WINTER PARK RANCH WSD | 3,250 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| WALSENBURG CITY OF | 3,230 | Surface water | Huerfano | Cucharas River |
| LONGS PEAK WD | 3,200 | Surface water | Boulder | St. Vrain Creek |
| PENROSE WD | 3,149 | Surface water | Fremont | Arkansas: Salida to Portland |
| ORCHARD CITY TOWN OF | 3,100 | Groundwater under the influence of surface water | Delta | North Fork/Tribs. |
| ANIMAS WC | 3,096 | Groundwater | La Plata | Animas River Basin |
| DILLON VALLEY DISTRICT | 3,063 | Surface water | Summit | Blue River Basin |
| PALISADE TOWN OF | 3,060 | Surface water | Mesa | Lower Colorado River |
| OLATHE TOWN OF | 3,015 | Purchased surface water | Montrose | Lower Uncompahgre River |
| LYONS TOWN OF | 2,990 | Purchased surface water | Boulder | St. Vrain Creek |
| PLATTEVILLE TOWN OF | 2,900 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| CRIPPLE CREEK CITY OF | 2,817 | Surface water | Teller | Arkansas: Salida to Portland |
| UPPER SURFACE CREEK DOMESTIC WUA | 2,800 | Surface water | Delta | North Fork/Tribs. |
| COLORADO CITY MD | 2,755 | Surface water | Pueblo | Saint Charles |
| PALMER LAKE TOWN OF | 2,686 | Surface water | El Paso | Fountain Creek |
| BUFFALO MOUNTAIN MD | 2,650 | Groundwater | Summit | Blue River Basin |
| CENTER TOWN OF | 2,575 | Groundwater | Saguache | Rio Grande |
| HOLYOKE CITY OF | 2,540 | Groundwater | Phillips | Arikaree River |
| EAST DILLON WD | 2,501 | Groundwater under the influence of surface water | Summit | Blue River Basin |
| NORTH PECOS WSD | 2,500 | Purchased surface water | Adams | Clear Creek |
| SOUTH SHERIDAN WATER AND SEWER DIST | 2,500 | Purchased surface water | Jefferson | no boundary on file |
| WIKIUP MHP | 2,500 | Groundwater | Adams | no boundary on file |
| PAONIA TOWN OF | 2,499 | Groundwater under the influence of surface water | Delta | North Fork/Tribs. |
| RANGELY TOWN OF | 2,495 | Surface water | Rio Blanco | White River Basin |
| RANGEVIEW MD | 2,487 | Purchased surface water | Arapahoe | South Platte: Denver Gage to Greeley |
| EASTERN ADAMS CO MD | 2,485 | Groundwater | Adams | South Platte: Greeley to Balzac |
| ALAMEDA WSD | 2,480 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| MEEKER TOWN OF | 2,473 | Groundwater | Rio Blanco | White River Basin |
| CRESTED BUTTE TOWN OF | 2,440 | Surface water | Gunnison | East River Basin |
| NEDERLAND TOWN OF | 2,406 | Surface water | Boulder | Boulder Creek |
| CEDAREDGE TOWN OF | 2,400 | Surface water | Delta | North Fork/Tribs. |
| SILVERTON TOWN OF | 2,387 | Surface water | San Juan | Animas River Basin |
| AKRON TOWN OF | 2,379 | Groundwater | Washington | Arikaree River |
| BASALT TOWN OF | 2,357 | Groundwater under the influence of surface water | Eagle | Roaring Fork River Basin |
| WRAY CITY OF | 2,342 | Groundwater | Yuma | Republican River |
| SPRING CANYON WSD | 2,320 | Purchased surface water | Larimer | Cache La Poudre River |
| BAYFIELD TOWN OF | 2,300 | Surface water | La Plata | Los Pinos River Basin |
| GRANBY TOWN OF SOUTH SERVICE AREA | 2,300 | Groundwater under the influence of surface water | Grand | Upper Colorado/Fraser Rivers |
| FLAGLER TOWN OF | 2,160 | Groundwater | Kit Carson | Republican River |
| FRASER TOWN OF | 2,150 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| LAS ANIMAS CITY OF | 2,139 | Groundwater | Bent | Arkansas: Fowler to Las Animas |
| PONCHA SPRINGS TOWN OF | 2,118 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| KERSEY WD | 2,101 | Purchased surface water | Weld | South Platte: Greeley to Balzac |
| HOTCHKISS TOWN OF | 2,050 | Surface water | Delta | North Fork/Tribs. |
| STRASBURG WSD | 2,050 | Groundwater | Adams | South Platte: Greeley to Balzac |
| GRAND LAKE TOWN OF | 2,035 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| GRANBY TOWN OF NORTH SERVICE AREA | 2,025 | Surface water | Grand | Upper Colorado/Fraser Rivers |
| TOWAOC WATER SYSTEM tribal | 2,020 | Purchased surface water | no boundary on file | |
| LA SALLE TOWN OF | 2,010 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| BACA GRANDE WSD | 2,006 | Groundwater | Saguache | San Luis Creek |
| KIMBERLY HILLS MHP | 2,005 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| CRESTED BUTTE SOUTH | 2,000 | Groundwater | Gunnison | East River Basin |
| CREEDE CITY OF | 1,965 | Groundwater | Mineral | Rio Grande |
| EL JEBEL MHP | 1,962 | Groundwater under the influence of surface water | Eagle | no boundary on file |
| ROUND MOUNTAIN WSD | 1,950 | Groundwater | Custer | Wet Mountain Valley |
| MOUNTAIN WSD | 1,941 | Groundwater under the influence of surface water | Jefferson | North Fork of South Platte |
| FALCON AREA WATER AND WASTEWATER | 1,926 | Groundwater | El Paso | Fountain Creek |
| ROARING FORK WSD | 1,912 | Groundwater | Garfield | Roaring Fork River Basin |
| WIGGINS TOWN OF | 1,909 | Groundwater | Morgan | South Platte: Greeley to Balzac |
| PINE LAKES RANCH | 1,905 | Purchased surface water | Adams | no boundary on file |
| KREMMLING TOWN OF | 1,859 | Surface water | Grand | Muddy/Troublesome Creeks |
| WEST OLIVE ESTATES | 1,850 | Groundwater | no boundary on file | |
| SPRING VALLEY MD NO 1 | 1,788 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| FRIENDLY VILLAGE OF AURORA MHP | 1,786 | Purchased surface water | Adams | no boundary on file |
| WOODLAND HILLS MHC | 1,740 | Purchased surface water | South Platte: Denver Gage to Greeley | |
| TIMBER RIDGE MHP | 1,736 | Purchased surface water | Larimer | no boundary on file |
| ARISTOCRAT RANCHETTE WATER PROJECT | 1,715 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| BUENA VISTA CORRECTIONAL FACILITY | 1,700 | Groundwater | Chaffee | no boundary on file |
| NORWOOD WATER COMMISSION | 1,700 | Surface water | San Miguel | San Miguel River Basin |
| FOREST LAKES MD | 1,699 | Groundwater | La Plata | Los Pinos River Basin |
| BOULDER MEADOWS MHP | 1,657 | Purchased surface water | Boulder | St. Vrain Creek |
| DEER TRAIL TOWN OF | 1,648 | Groundwater | Arapahoe | South Platte: Greeley to Balzac |
| DOLORES TOWN OF | 1,626 | Surface water | Montezuma | West Dolores Creek/Tribs. |
| FRONT RANGE | 1,620 | Purchased surface water | Broomfield | no boundary on file |
| AVONDALE WSD | 1,615 | Groundwater | Pueblo | Arkansas: Portland to Fowler |
| RALSTON VALLEY WSD | 1,610 | Purchased surface water | Jefferson | Clear Creek |
| LAKE DURANGO WA wholesaler | 1,577 | Surface water | La Plata | Animas River Basin |
| IGNACIO-SOUTHERN UTE RURAL WATER SYSTEM wholesaler tribal | 1,527 | Surface water | no boundary on file | |
| HILLCREST VILLAGE MHP | 1,505 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| EAGLE RIVER VILLAGE MHP | 1,500 | Groundwater | Eagle | Eagle River Basin |
| MAY VALLEY WA | 1,500 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| REDWOOD ESTATES | 1,500 | Purchased surface water | South Platte: Denver Gage to Greeley | |
| WALDEN WSD | 1,500 | Groundwater | El Paso | South Platte Cheesman to Denver Gage |
| OURAY CITY OF | 1,460 | Groundwater under the influence of surface water | Ouray | Upper Uncompahgre River |
| EAST ALAMOSA | 1,453 | Purchased groundwater | Alamosa | Rio Grande |
| STEAMBOAT II MD | 1,450 | Purchased surface water | Routt | Upper Yampa River |
| FOXRIDGE FARMS MHP | 1,440 | Groundwater | Arapahoe | South Platte: Denver Gage to Greeley |
| DEL NORTE TOWN OF | 1,429 | Groundwater | Rio Grande | Rio Grande |
| MANCOS TOWN OF | 1,390 | Surface water | Montezuma | Mancos River Basin |
| LOOKOUT MOUNTAIN WD | 1,378 | Surface water | Clear Creek | Clear Creek |
| SPRINGFIELD TOWN OF | 1,378 | Groundwater | Baca | Arkansas: Las Animas to Stateline |
| PURGATORY MD | 1,364 | Groundwater | La Plata | Animas River Basin |
| HOLLY RIDGE LODGE WATER SYSTEM | 1,350 | Groundwater | no boundary on file | |
| PARACHUTE TOWN OF | 1,320 | Surface water | Garfield | Rifle/Elk/Parachute Creeks |
| INDIAN HILLS WD | 1,300 | Groundwater under the influence of surface water | Jefferson | Bear Creek |
| MANCOS RURAL WATER COMPANY | 1,300 | Surface water | Montezuma | Mancos River Basin |
| ORDWAY TOWN OF | 1,300 | Groundwater | Crowley | Arkansas: Fowler to Las Animas |
| THE GROVE AT ALTA RIDGE | 1,300 | Purchased surface water | South Platte: Denver Gage to Greeley | |
| WIGWAM MUTUAL WC | 1,300 | Groundwater under the influence of surface water | El Paso | Fountain Creek |
| LIMON CORRECTIONAL FACILITY | 1,289 | Purchased groundwater | Lincoln | no boundary on file |
| GREATROCK NORTH WSD | 1,250 | Groundwater | Adams | South Platte: Greeley to Balzac |
| CANTERBURY PARK | 1,240 | Purchased surface water | no boundary on file | |
| THE SPRINGS MHP | 1,229 | Purchased groundwater | no boundary on file | |
| JULESBURG TOWN OF | 1,225 | Groundwater | Sedgwick | South Platte: Balzac to Stateline |
| HARMONY VILLAGE MHP | 1,215 | Purchased surface water | Larimer | no boundary on file |
| DENVER CASCADE MHP | 1,200 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| EDGEMONT RANCH MD | 1,200 | Surface water | La Plata | Animas River Basin |
| MINTURN TOWN OF | 1,200 | Surface water | Eagle | Eagle River Basin |
| HOLIDAY HILLS VILLAGE | 1,190 | Purchased surface water | Adams | no boundary on file |
| PINE BLUFFS, TOWN OF | 1,186 | Groundwater | no boundary on file | |
| FOWLER TOWN OF | 1,169 | Groundwater under the influence of surface water | Otero | Arkansas: Fowler to Las Animas |
| CONSOLIDATED BELL MTN RANCH MD | 1,162 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| APPLE TREE PARK | 1,160 | Groundwater | Garfield | Divide Creek |
| GILCREST TOWN OF | 1,150 | Purchased surface water | Weld | South Platte: Denver Gage to Greeley |
| CASA ESTATES MHP | 1,117 | Purchased surface water | Adams | no boundary on file |
| PINE BROOK HILLS WD | 1,100 | Surface water | Boulder | Boulder Creek |
| PIERCE TOWN OF | 1,094 | Purchased surface water | Weld | Cache La Poudre River |
| PALMS OF ARCHER | 1,092 | Groundwater | no boundary on file | |
| STONEYBROOK MHP | 1,073 | Purchased surface water | Weld | no boundary on file |
| DALLAS CREEK WC | 1,059 | Surface water | Ouray | Upper Uncompahgre River |
| NORTHBROOK VILLAS MHC | 1,052 | Purchased surface water | Montrose | no boundary on file |
| FALCON HIGHLANDS MD | 1,050 | Groundwater | El Paso | Fountain Creek |
| SOUTHFORK DENTON MOBILE HOME PARK | 1,050 | Groundwater | no boundary on file | |
| FOREST LAKES MD | 1,049 | Surface water | El Paso | Fountain Creek |
| FRIENDLY VILLAGE OF THE ROCKIES | 1,046 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| ELBERT COUNTY HWY 86 WD | 1,040 | Groundwater | Elbert | no boundary on file |
| CAVE CREEK | 1,025 | Purchased surface water | no boundary on file | |
| CIMARRON VILLAGE | 1,010 | Purchased surface water | Broomfield | no boundary on file |
| CLOVERLEAF COLORADO LLC | 1,007 | Purchased surface water | Larimer | no boundary on file |
| LOG LANE VILLAGE TOWN OF | 1,006 | Purchased groundwater | Morgan | South Platte: Greeley to Balzac |
| BYERS WSD | 1,000 | Groundwater | Arapahoe | South Platte: Greeley to Balzac |
| HOMESTEAD WC | 1,000 | Surface water | Jefferson | Bear Creek |
| LONGVIEW MHP | 1,000 | Purchased surface water | Weld | no boundary on file |
| MILE HI WATER INC HAULER | 1,000 | Purchased surface water | Boulder | Boulder Creek |
| NORTH LINCOLN WSD | 1,000 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| RIDGWAY TOWN OF | 1,000 | Surface water | Ouray | Upper Uncompahgre River |
| BROOK FOREST WD | 998 | Groundwater | Jefferson | Bear Creek |
| NORTHWEST PINES MOBILE HOME COMMUNITY wholesaler | 990 | Groundwater | no boundary on file | |
| POUDRE VALLEY MHC | 985 | Purchased surface water | Larimer | no boundary on file |
| ANTONITO TOWN OF | 981 | Groundwater under the influence of surface water | Conejos | Conejos Creek |
| MANASSA TOWN OF | 976 | Groundwater | Conejos | Conejos Creek |
| HAXTUN TOWN OF | 963 | Groundwater | Phillips | Arikaree River |
| STRATTON TOWN OF | 960 | Groundwater | Kit Carson | Republican River |
| OAK CREEK TOWN OF | 950 | Surface water | Routt | Upper Yampa River |
| PINEWOOD ON THE LAKE MHP | 950 | Groundwater | no boundary on file | |
| COLLINS AIRE MHC | 946 | Purchased surface water | Larimer | no boundary on file |
| DURANGO WEST MD NO 2 | 930 | Purchased surface water | La Plata | Animas River Basin |
| PARK FOREST | 930 | Groundwater | El Paso | Fountain Creek |
| DEBEQUE TOWN OF | 911 | Surface water | Mesa | Roan Creek Basin |
| KIOWA WATER AND WASTEWATER AUTHORITY | 910 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| FAIRPLAY TOWN OF | 909 | Groundwater under the influence of surface water | Park | Upper South Platte |
| ARBORDALE ACRES MHP | 901 | Purchased surface water | Boulder | no boundary on file |
| BENTS FORT WC | 900 | Purchased groundwater | Otero | no boundary on file |
| GARDEN VALLEY | 900 | Groundwater | El Paso | Fountain Creek |
| RMNP HEADQUARTERS EAST | 900 | Groundwater | Larimer | Big Thompson River |
| BOW MAR WSD | 899 | Purchased surface water | Arapahoe | Bear Creek |
| BOULDER RIDGE MHP | 897 | Purchased surface water | Boulder | no boundary on file |
| TWO RIVERS VILLAGE | 896 | Groundwater | Eagle | Tribs. North of Colorado River |
| MIDLANDS VILLAGE | 893 | Purchased surface water | Mesa | no boundary on file |
| HUGO TOWN OF | 885 | Groundwater | Lincoln | Arkansas: Las Animas to Stateline |
| SAN JUAN RIVER VILLAGE MD | 877 | Groundwater under the influence of surface water | Archuleta | San Juan River Basin |
| HIGHLAND LAKES WD | 875 | Groundwater under the influence of surface water | Teller | Upper South Platte |
| NUCLA TOWN OF | 875 | Purchased surface water | Montrose | San Miguel River Basin |
| COUNTRYSIDE VILLAGE OF DENVER | 863 | Purchased surface water | Adams | no boundary on file |
| ROXBOROUGH NW DOUGLAS COUNTY | 860 | Purchased surface water | Douglas | no boundary on file |
| DOVE CREEK TOWN OF | 850 | Surface water | Dolores | McElmo Creek Basin |
| LA VETA TOWN OF | 850 | Surface water | Huerfano | Cucharas River |
| PIEDRA PARK MD | 850 | Groundwater under the influence of surface water | Archuleta | Navajo Reservoir |
| SANFORD TOWN OF | 850 | Groundwater | Conejos | Alamosa La Jara |
| SAN LAZARO MFCTD HOUSING COMMUNITY | 844 | Surface water | Boulder | Boulder Creek |
| COLUMBINE LAKES HOA | 843 | Purchased surface water | Arapahoe | no boundary on file |
| LAGO VISTA MOBILE HOME PARK | 842 | Purchased surface water | no boundary on file | |
| CHEYENNE WELLS TOWN OF | 840 | Groundwater | Cheyenne | Republican River |
| ROGERS MESA WC | 840 | Purchased surface water | Delta | North Fork/Tribs. |
| VILLA WEST | 833 | Purchased surface water | Weld | no boundary on file |
| GOLDEN TERRACE WEST | 825 | Purchased surface water | no boundary on file | |
| LA JARA TOWN OF | 825 | Groundwater | Conejos | Alamosa La Jara |
| BASELINE WD | 820 | Purchased surface water | Boulder | Boulder Creek |
| HICKORY VILLAGE | 816 | Purchased surface water | Larimer | no boundary on file |
| RIVER VALLEY MHC | 803 | Purchased surface water | Weld | no boundary on file |
| CANDLEWOOD PARK | 800 | Purchased surface water | Mesa | no boundary on file |
| GUNNISON COUNTY WSD | 800 | Surface water | Gunnison | Tomichi Creek |
| HOLLY TOWN OF | 800 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| IGNACIO TOWN OF | 800 | Purchased surface water | La Plata | Los Pinos River Basin |
| MORRISON CREEK METRO DISTRICT | 800 | Groundwater | Routt | Upper Yampa River |
| SAGE WUA | 800 | Purchased groundwater | El Paso | Fountain Creek |
| DEER CREEK WD | 792 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| CALHAN TOWN OF | 780 | Groundwater | El Paso | Arkansas: Las Animas to Stateline |
| COUNTRYSIDE OF LONGMONT | 775 | Purchased surface water | no boundary on file | |
| WILLIAMSBURG TOWN OF | 775 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| FOREST VIEW ACRES WD | 772 | Surface water | El Paso | Fountain Creek |
| MCDONALD FARMS ENTERPRISES INC wholesaler | 772 | Purchased surface water | Weld | no boundary on file |
| SPRING HILL MHP | 764 | Groundwater | no boundary on file | |
| THE MEADOWS | 758 | Purchased surface water | no boundary on file | |
| ACADEMY WSD | 750 | Groundwater | El Paso | Fountain Creek |
| COTTONWOOD SPRINGS MHP | 750 | Surface water | Garfield | Rifle/Elk/Parachute Creeks |
| DURANGO WEST MD NO 1 | 750 | Purchased surface water | La Plata | Animas River Basin |
| ELBERT CREEK WATER CO | 750 | Surface water | La Plata | Animas River Basin |
| PINEWOOD SPRINGS WD | 745 | Surface water | Larimer | Big Thompson River |
| RYE TOWN OF | 745 | Surface water | Pueblo | Saint Charles |
| MT VERNON COUNTRY CLUB | 734 | Groundwater under the influence of surface water | Jefferson | Bear Creek |
| COLORADO MTN COLLEGE SVC | 715 | Groundwater | Garfield | no boundary on file |
| YANKEE SPRINGS MEADOWS | 710 | Groundwater | no boundary on file | |
| BUCKHORN RANCH ESTATES MHP | 702 | Purchased surface water | no boundary on file | |
| MILE HIGH WC | 700 | Purchased surface water | Adams | Boulder Creek |
| SKYLINE VILLAGE MOBILE HOME PK | 700 | Purchased surface water | no boundary on file | |
| HOT SULPHUR SPRINGS TOWN OF | 687 | Surface water | Grand | Upper Colorado/Fraser Rivers |
| MOUNTAIN MUTUAL WA | 681 | Groundwater | Teller | Arkansas: Salida to Portland |
| DIVIDE MPC MD NO 1 | 679 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| COLLBRAN TOWN OF | 678 | Groundwater under the influence of surface water | Mesa | Lower Colorado River |
| KEYSTONE RANCH | 670 | Groundwater | Summit | Blue River Basin |
| HOOVER HILLS WSD | 662 | Purchased surface water | Boulder | Boulder Creek |
| FRIENDLY VILLAGE OF GREELEY MHP | 660 | Purchased surface water | Weld | no boundary on file |
| SWINK TOWN OF | 660 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| EADS TOWN OF | 656 | Groundwater | Kiowa | Arkansas: Las Animas to Stateline |
| EL MORO HOEHNE PIPELINE ASSOC | 655 | Purchased surface water | Las Animas | Purgatoire River |
| PRAIRIE GREENS MHP | 654 | Purchased surface water | Weld | no boundary on file |
| LAMPLIGHTER MHP | 651 | Purchased surface water | Adams | South Platte: Denver Gage to Greeley |
| WALSH TOWN OF | 650 | Groundwater | Baca | Arkansas: Las Animas to Stateline |
| LAMPLIGHTER RHP | 643 | Purchased surface water | no boundary on file | |
| MASON MANOR | 630 | Groundwater | no boundary on file | |
| SAN LUIS WSD | 629 | Groundwater | Costilla | Culebra Creek |
| CANYON RIDGE | 625 | Purchased surface water | no boundary on file | |
| BEACH MHP | 624 | Purchased surface water | no boundary on file | |
| SOUTH SWINK WATER AUTHORITY | 622 | Groundwater | Otero | no boundary on file |
| DUTCH HILLS | 620 | Groundwater | no boundary on file | |
| SIMLA TOWN OF | 618 | Groundwater | Elbert | Arkansas: Las Animas to Stateline |
| FOUR SEASONS MOBILE HOME PARK | 600 | Groundwater | no boundary on file | |
| OTIS TOWN OF | 600 | Groundwater | Washington | Arikaree River |
| TELLER COUNTY WSD | 600 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| WALDEN TOWN OF | 600 | Surface water | Jackson | North Platte River Basin |
| LAKE CITY TOWN OF | 587 | Groundwater | Hinsdale | Upper Gunnison River |
| NATURITA TOWN OF | 585 | Purchased surface water | Montrose | San Miguel River Basin |
| GOLDEN TERRACE VILLAGE | 580 | Purchased surface water | Jefferson | no boundary on file |
| KV HOA INC | 580 | Groundwater | Saguache | San Luis Creek |
| YMCA SNOW MTN RANCH | 578 | Groundwater under the influence of surface water | Grand | no boundary on file |
| DIVIDE WATER PROVIDERS INC | 570 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| INDEPENDENCE WSD | 567 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| SOUTH FORK WEST MUNICIPAL TOWN OF | 566 | Groundwater | Rio Grande | Rio Grande |
| TABERNASH MEADOWS WSD | 564 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| COSTILLA COUNTY WS | 561 | Groundwater | Costilla | Culebra Creek |
| CIMARRON CREEK | 560 | Purchased surface water | no boundary on file | |
| TERRACE HEIGHTS | 548 | Purchased groundwater | no boundary on file | |
| ST VRAIN MHP LLC | 544 | Purchased surface water | no boundary on file | |
| BURT ESTATES MHC | 543 | Purchased groundwater | no boundary on file | |
| CROWLEY COUNTY WA | 530 | Groundwater | Crowley | Arkansas: Fowler to Las Animas |
| ELKHORN RANCH MD NO 1 | 530 | Groundwater | Elbert | South Platte: Denver Gage to Greeley |
| SMITH CREEK CROSSING | 518 | Purchased groundwater | Grand | no boundary on file |
| BRUSH CREEK WD | 516 | Purchased surface water | Pitkin | Roaring Fork River Basin |
| GRANADA TOWN OF | 515 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| FRANKLIN MOBILE HOME PARK | 513 | Purchased surface water | Adams | no boundary on file |
| LA PLATA ARCHULETA WATER DISTRICT | 510 | Purchased surface water | La Plata | Los Pinos River Basin |
| COUNTRYSIDE ESTATES PUEBLO | 508 | Purchased surface water | Pueblo | no boundary on file |
| CRESTLINE MANOR | 505 | Purchased surface water | no boundary on file | |
| EL MORRO MOBILE ESTATES | 504 | Purchased surface water | El Paso | no boundary on file |
| PUEBLO GRANDE VILLAGE | 504 | Purchased surface water | no boundary on file | |
| ROCKVALE TOWN OF | 504 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| SAGUACHE TOWN OF | 504 | Groundwater | Saguache | Saguache Creek |
| DECATUR MHP, LLC | 500 | Purchased surface water | no boundary on file | |
| EMPIRE TOWN OF | 500 | Surface water | Clear Creek | Clear Creek |
| NUNN TOWN OF | 499 | Purchased surface water | Weld | South Platte: Greeley to Balzac |
| EUREKA WC | 498 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| MANZANOLA TOWN OF | 497 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| VICTOR CITY OF | 491 | Surface water | Teller | Arkansas: Salida to Portland |
| MONTEZUMA CNTY WD NO 1 | 490 | Purchased surface water | Montezuma | McElmo Creek Basin |
| RIVER MEADOWS THE | 490 | Purchased surface water | Montrose | Lower Uncompahgre River |
| THUNDERBIRD WSD | 490 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| RAINTREE ESTATES | 489 | Groundwater | no boundary on file | |
| LAKE FORK MHP | 487 | Groundwater | Lake | Arkansas: Headwaters to Salida |
| CRAWFORD MESA WA | 486 | Groundwater | Delta | North Fork/Tribs. |
| BAILEY WSD | 483 | Surface water | Park | North Fork of South Platte |
| GAME TRAIL ASSOCIATION INC | 480 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| SHERIDAN MHP | 480 | Groundwater | Jefferson | no boundary on file |
| CRAWFORD TOWN OF | 477 | Groundwater | Delta | North Fork/Tribs. |
| FT GARLAND WSD | 477 | Groundwater | Costilla | Trinchera Creek |
| CEDAR MOUNTAIN VILLAGE MHP | 475 | Purchased surface water | Moffat | no boundary on file |
| MOUNTAINSIDE ESTATES MHP | 473 | Purchased surface water | Jefferson | Bear Creek |
| CHEYENNE MOUNTAIN ESTATES MHP | 472 | Purchased surface water | El Paso | no boundary on file |
| BOBCAT MEADOWS MD | 470 | Groundwater | El Paso | Fountain Creek |
| VALLEY MAINT CORP NO 1 | 470 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| BLANCA TOWN OF | 469 | Groundwater | Costilla | Trinchera Creek |
| RED CLIFF TOWN OF | 469 | Surface water | Eagle | Eagle River Basin |
| YAMPA TOWN OF | 467 | Groundwater under the influence of surface water | Routt | Upper Yampa River |
| MESA CORTINA WSD | 466 | Groundwater | Summit | Blue River Basin |
| SUNSET PARK MHC | 462 | Purchased surface water | Larimer | no boundary on file |
| ALMA TOWN OF | 460 | Surface water | Park | Upper South Platte |
| BELLEVIEW CHRISTIAN COLLEGE | 460 | Groundwater | Adams | no boundary on file |
| NEWDALE GRAND VALLEY WC | 458 | Groundwater | Otero | no boundary on file |
| SWAN MEADOW VILLAGE | 455 | Purchased groundwater under the influence | Summit | no boundary on file |
| ST MARYS GLACIER WSD | 451 | Groundwater under the influence of surface water | Clear Creek | Clear Creek |
| KINGSWOOD PLAZA MHC LLC | 450 | Purchased groundwater | no boundary on file | |
| RIVERVIEW CG | 450 | Surface water | Larimer | Big Thompson River |
| SHANNON WSD | 450 | Groundwater | Boulder | Boulder Creek |
| STONETOWN SPRING OAKS MOBILE HOME PARK | 450 | Groundwater | no boundary on file | |
| WESTERN HILLS MHP | 450 | Purchased surface water | no boundary on file | |
| WESTWOOD LAKES WD | 450 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| HIGH CLIFF ESTATES | 448 | Purchased groundwater | no boundary on file | |
| AGUILAR TOWN OF | 447 | Groundwater | Las Animas | Apishapa River |
| FLEMING TOWN OF | 446 | Groundwater | Logan | Arikaree River |
| BEULAH WATER WORKS DISTRICT | 445 | Surface water | Pueblo | Saint Charles |
| EAGLE CREST MHP | 441 | Purchased surface water | Weld | St. Vrain Creek |
| BROOKSIDE TOWN OF | 438 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| RICO TOWN OF | 437 | Groundwater | Dolores | West Dolores Creek/Tribs. |
| COUNTRYSIDE OF GREELEY | 435 | Purchased surface water | Weld | no boundary on file |
| FSI HOLLY HILLS PROPERTY LLC | 435 | Groundwater | no boundary on file | |
| GROVELAND MANOR | 435 | Groundwater | no boundary on file | |
| KANNAH CREEK | 435 | Surface water | Mesa | Lower Gunnison River |
| EVERGREEN LAKE COMPANY | 431 | Surface water | Gunnison | Upper Gunnison River |
| COLUMBINE LAKE WSD | 428 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| GOLDEN TERRACE SOUTH | 425 | Purchased surface water | no boundary on file | |
| SADDLEBACK RV | 425 | Purchased surface water | no boundary on file | |
| SOPRIS VILLAGE HOA | 425 | Groundwater | Eagle | Roaring Fork River Basin |
| SUNSET WD | 425 | Purchased surface water | Larimer | Cache La Poudre River |
| ALEDO MOBILE HOME PARK | 423 | Groundwater | no boundary on file | |
| WOODGATE MOBILE HOME VILLAGE | 423 | Groundwater | no boundary on file | |
| LAMPLIGHTER MOBILE HOME PARK | 420 | Purchased surface water | Fremont | no boundary on file |
| ELK SPRINGS HOA | 416 | Groundwater | Garfield | no boundary on file |
| PINE DRIVE WD | 416 | Surface water | Pueblo | Saint Charles |
| MITCHELL COOPER DITCH PIPELINE | 415 | Purchased surface water | Garfield | no boundary on file |
| ALDASORO RANCH HOC | 412 | Groundwater | San Miguel | San Miguel River Basin |
| STEAMBOAT LAKE WD | 411 | Groundwater | Routt | Upper Yampa River |
| AVILLA EASTLAKE | 410 | Purchased surface water | no boundary on file | |
| BLUE VALLEY MD | 410 | Groundwater under the influence of surface water | Grand | Blue River Basin |
| LAKE CREEK MEADOWS MD | 407 | Groundwater | Eagle | Eagle River Basin |
| BIG ELK MEADOWS WA | 405 | Surface water | Larimer | Big Thompson River |
| WILEY TOWN OF | 405 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| SKYLINE | 402 | Purchased surface water | Larimer | no boundary on file |
| BONE MESA DOMESTIC WD | 400 | Groundwater under the influence of surface water | Delta | North Fork/Tribs. |
| EL RANCHO FLORIDA MD | 400 | Groundwater under the influence of surface water | La Plata | Animas River Basin |
| FOREST HILLS MD RIVA CHASE | 400 | Groundwater | Jefferson | Bear Creek |
| GARDNER WATER AND SANITATION DIST | 400 | Groundwater | Huerfano | Huerfano River |
| WESTBANK RANCH HOA | 400 | Groundwater | Garfield | Roaring Fork River Basin |
| OLNEY SPRINGS TOWN OF | 399 | Groundwater | Crowley | Arkansas: Fowler to Las Animas |
| CONSOLIDATED GLACIER VIEW MEADOWS ASSOC | 395 | Groundwater | Larimer | Cache La Poudre River |
| OAK LANE MHC | 388 | Purchased surface water | no boundary on file | |
| REDHILL FOREST POMWACA | 388 | Groundwater | Park | Upper South Platte |
| GRANADA RURAL WATER AUTHORITY | 378 | Groundwater | Prowers | no boundary on file |
| MCCLAVE WA INC | 378 | Groundwater | Bent | Arkansas: Las Animas to Stateline |
| NORTH SHORE WSD | 378 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| CV LARAMIE MHP, LLC | 375 | Groundwater | no boundary on file | |
| STONETOWN ROYAL COACH TRAILS MHP | 375 | Groundwater | no boundary on file | |
| GATEWAY CANYONS WS | 370 | Groundwater | Mesa | no boundary on file |
| RIVERLAND LOT OWNERS ASSOC | 368 | Groundwater | Gunnison | East River Basin |
| ROMEO TOWN OF | 365 | Groundwater | Conejos | Conejos Creek |
| HOLIDAY VILLAGE MOBILE HOME COMMUNITY | 360 | Purchased surface water | El Paso | Fountain Creek |
| SANTA FE TRAIL RANCH MD | 360 | Purchased surface water | Las Animas | Purgatoire River |
| BENBROOK VILLAGE MHP | 357 | Groundwater | no boundary on file | |
| STONEYBROOK POINTE | 355 | Purchased surface water | Weld | no boundary on file |
| LA PLATA WEST WATER AUTHORITY | 354 | Purchased surface water | La Plata | La Plata River Basin |
| APPLE & CHERRY RIDGE VILLAGE | 350 | Purchased surface water | Larimer | no boundary on file |
| BAXTER WATER AND SERVICES | 350 | Groundwater | Pueblo | Arkansas: Portland to Fowler |
| BLUE MOUNTAIN WD | 350 | Groundwater | Jefferson | South Platte: Denver Gage to Greeley |
| BONVUE WATER AND SANITATION DISTRICT | 350 | Purchased surface water | Jefferson | South Platte Cheesman to Denver Gage |
| COAL CREEK TOWN OF | 350 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| DINOSAUR TOWN OF | 350 | Groundwater | Moffat | White River Basin |
| GAMBEL OAKS HOA | 350 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| HI LAND ACRES WSD | 350 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| IDLEDALE WSD | 350 | Groundwater under the influence of surface water | Jefferson | Bear Creek |
| RAMBLEWOOD MOBILE HOME PARK | 350 | Purchased groundwater | no boundary on file | |
| WATTENBERG IMPROVEMENT ASSOC | 350 | Groundwater | Weld | South Platte: Denver Gage to Greeley |
| WOODLANDS EAST | 350 | Purchased surface water | Weld | no boundary on file |
| CAPITAL CROSSINGS | 345 | Groundwater | no boundary on file | |
| CUCHARAS SANITATION AND WATER DISTRICT | 343 | Surface water | Huerfano | Cucharas River |
| SKYLARK MOBILE HOME COMMUNITY | 342 | Purchased surface water | Boulder | no boundary on file |
| NAVAJO WESTERN WD RESORTS | 341 | Groundwater | Huerfano | Cucharas River |
| ALLENSPARK WSD | 340 | Surface water | Boulder | St. Vrain Creek |
| WINDCLIFF POA | 339 | Purchased surface water | Larimer | no boundary on file |
| MOUNTAIN VALLEY MHP | 338 | Groundwater | Garfield | Roaring Fork River Basin |
| FRUITLAND DOMESTIC WC | 335 | Surface water | Montrose | Upper Gunnison River |
| SKYLAND MD | 335 | Groundwater | Gunnison | East River Basin |
| MESA WSD | 330 | Groundwater under the influence of surface water | Mesa | Lower Colorado River |
| ILIFF TOWN OF | 328 | Groundwater | Logan | South Platte: Balzac to Stateline |
| IMPERIAL MHC | 328 | Purchased groundwater | no boundary on file | |
| NORTH CARTER LAKE WD | 328 | Purchased surface water | Larimer | Big Thompson River |
| EAST FLORENCE WA | 326 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| KIT CARSON TOWN OF | 326 | Groundwater | Cheyenne | Arkansas: Las Animas to Stateline |
| ARABIAN ACRES MD | 325 | Groundwater | Teller | Upper South Platte |
| BEVERLY HILLS MUTUAL WC | 325 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| GREEN ACRES MHP | 325 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| WJ METRO DISTRICT | 324 | Groundwater under the influence of surface water | Pitkin | Roaring Fork River Basin |
| SOUTHWEST HORIZON RANCH | 323 | Groundwater | La Plata | Animas River Basin |
| ILIUM VALLEY WS | 322 | Groundwater | San Miguel | San Miguel River Basin |
| LAZY GLEN HOA | 322 | Groundwater | Pitkin | Roaring Fork River Basin |
| MOUNTAIN VIEW WUA | 320 | Groundwater | Adams | no boundary on file |
| THE ASPENS MOBILE HOME VILLAGE | 318 | Purchased surface water | Eagle | no boundary on file |
| ALPINE VISTA VILLAGE | 313 | Purchased surface water | Larimer | no boundary on file |
| CHATFIELD SOUTH WD | 312 | Purchased surface water | Douglas | South Platte Cheesman to Denver Gage |
| SUNFLOWER VALLEY PIPELINE ASSN | 312 | Purchased surface water | Las Animas | Purgatoire River |
| TIMBER CREEK WD | 312 | Groundwater | Summit | Blue River Basin |
| HILLROSE TOWN OF | 310 | Purchased groundwater | Morgan | South Platte: Greeley to Balzac |
| ELDORADO MUNICIPAL SYSTEM | 308 | Groundwater | Boulder | Boulder Creek |
| BRIGGSDALE WC | 303 | Groundwater | Weld | South Platte: Greeley to Balzac |
| CHAPARRAL VILLAGE MHP | 303 | Purchased surface water | no boundary on file | |
| ASPEN RIDGE MHC | 302 | Purchased surface water | Larimer | no boundary on file |
| SILVER HEIGHTS WSD | 301 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| ASPEN EQUESTRIAN BLUE CREEK RANCH | 300 | Groundwater under the influence of surface water | Garfield | Roaring Fork River Basin |
| ASPEN VILLAGE MD | 300 | Groundwater under the influence of surface water | Pitkin | Roaring Fork River Basin |
| CAVERN SPRINGS MHC, LLC | 300 | Groundwater | Garfield | Roaring Fork River Basin |
| EAST BOULDER COUNTY WD | 300 | Purchased surface water | Boulder | Boulder Creek |
| ELBERT WSD | 300 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| FALCON HEIGHTS POA | 300 | Groundwater | El Paso | Fountain Creek |
| FORT LYON | 300 | Groundwater | Bent | Arkansas: Las Animas to Stateline |
| PAGELS TP | 300 | Groundwater | Morgan | South Platte: Greeley to Balzac |
| PRAIRIE WC | 300 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| RANCH AT ROARING FORK | 300 | Groundwater | Garfield | Roaring Fork River Basin |
| STARWOOD METROPOLITAN DISTRICT | 300 | Groundwater | Pitkin | Roaring Fork River Basin |
| THORNTON ESTATES | 300 | Purchased surface water | no boundary on file | |
| WHITE MESA WATER SYSTEM tribal | 300 | Groundwater | no boundary on file | |
| WILL O WISP METRO DISTRICT | 300 | Groundwater | Park | North Fork of South Platte |
| COUNTRY ESTATES MOBILE HOME PARK | 297 | Purchased surface water | Weld | no boundary on file |
| TERRACE PARK MHP | 297 | Purchased surface water | Weld | no boundary on file |
| OLD ORCHARD ESTATES | 296 | Groundwater | no boundary on file | |
| SEIBERT TOWN OF | 296 | Groundwater | Kit Carson | Republican River |
| PEETZ TOWN OF | 295 | Groundwater | Logan | South Platte: Balzac to Stateline |
| PITKIN MESA PIPELINE CO | 295 | Groundwater under the influence of surface water | Delta | no boundary on file |
| CRESTONE WS | 293 | Groundwater | Saguache | San Luis Creek |
| MEADOW STREAMS ESTATES | 293 | Groundwater | no boundary on file | |
| ANIMAS VIEW MHP CO-OP | 292 | Purchased surface water | La Plata | no boundary on file |
| RED SKY RANCH | 291 | Surface water | Eagle | Eagle River Basin |
| ASPEN SPRINGS MD wholesaler | 290 | Groundwater | Archuleta | Piedra River Basin |
| WILSON MESA | 290 | Surface water | San Miguel | no boundary on file |
| RIFLE CORRECTIONAL CENTER | 287 | Groundwater | Garfield | Rifle/Elk/Parachute Creeks |
| CAVANAUGH HILLS WS | 286 | Groundwater | Adams | South Platte: Greeley to Balzac |
| 96 PIPELINE CO INC | 285 | Purchased groundwater | Crowley | Arkansas: Fowler to Las Animas |
| HILLTOP WC | 285 | Groundwater | Otero | no boundary on file |
| PLEASANT GROVE MHP | 285 | Purchased surface water | Larimer | no boundary on file |
| WATER ON THE SPOT wholesaler | 284 | Purchased surface water | Fremont | no boundary on file |
| LOVELAND MHP | 283 | Purchased surface water | Larimer | no boundary on file |
| EMERALD ACRES MOBILE HOME PARK | 280 | Purchased surface water | no boundary on file | |
| JAMESTOWN TOWN OF | 280 | Surface water | Boulder | St. Vrain Creek |
| SODA SPRINGS WA | 280 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| STONETOWN OAKS MHP LLC | 280 | Purchased groundwater | no boundary on file | |
| SPRUCE HILL DEVELOPMENT | 277 | Groundwater | Park | no boundary on file |
| THE RINCON WATER COOPERATIVE | 276 | Groundwater | no boundary on file | |
| LARKSPUR TOWN OF | 275 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| ELLICOTT UTILITIES COMPANY LLC | 272 | Purchased groundwater | El Paso | no boundary on file |
| NORTH POINT ESTATES MHP | 271 | Purchased surface water | Pueblo | no boundary on file |
| VALLEY WC | 270 | Groundwater | Otero | no boundary on file |
| PALMER LAKE MOBILE HOME RANCH | 268 | Purchased groundwater | El Paso | Fountain Creek |
| NUEVA VIDA MOBILE HOME PARK | 266 | Purchased surface water | Larimer | no boundary on file |
| ANTELOPE HILLS ASSOC | 265 | Purchased surface water | Gunnison | no boundary on file |
| RIO GRANDE WATER COMPANY | 265 | Groundwater under the influence of surface water | Rio Grande | Rio Grande |
| BOONE TOWN OF | 263 | Groundwater | Pueblo | Arkansas: Portland to Fowler |
| HAZELTINE HEIGHTS WATER | 261 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| ANNUNCIATION HEIGHTS | 260 | Groundwater | Larimer | St. Vrain Creek |
| COPPER KEY VILLAGE MHP | 260 | Purchased surface water | Weld | no boundary on file |
| PROSPERITY LANE WA | 260 | Purchased groundwater | Prowers | no boundary on file |
| SHANGRILA MHP | 260 | Purchased surface water | Fountain Creek | |
| SLEEPY VALLEY COMMUNITY MHP | 260 | Purchased surface water | El Paso | no boundary on file |
| OVID TOWN OF | 259 | Groundwater | Sedgwick | South Platte: Balzac to Stateline |
| HOMESTEAD TRAILS | 258 | Groundwater | La Plata | Los Pinos River Basin |
| BELLYACHE RIDGE MD | 257 | Groundwater | Eagle | no boundary on file |
| GRAND MEADOW OF LONGMONT MHP | 255 | Purchased surface water | Boulder | no boundary on file |
| CHERAW TOWN OF | 254 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| CAPULIN WD | 250 | Groundwater | Conejos | Alamosa La Jara |
| DUNCANSVILLE MHP LLC | 250 | Groundwater | no boundary on file | |
| ELEVADO ESTATES LLC | 250 | Groundwater | Jefferson | no boundary on file |
| FLORISSANT WSD | 250 | Groundwater under the influence of surface water | Teller | Upper South Platte |
| GARDEN MEADOWS | 250 | Purchased surface water | no boundary on file | |
| GRAND VIEW MHP | 250 | Groundwater | El Paso | Fountain Creek |
| HANSON MESA DOMESTIC PIPELINE CO INC | 250 | Purchased surface water | Delta | North Fork/Tribs. |
| ILDU LEPERE MHP, LLC | 250 | Purchased surface water | no boundary on file | |
| INSPIRATION VALLEY MHP | 250 | Groundwater | Jefferson | Clear Creek |
| LAKE FOREST MUTUAL WC | 250 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| LAMPLIGHTER ESTATES MHP | 250 | Purchased surface water | Moffat | no boundary on file |
| LEFTHAND WSD LAKE PINES | 250 | Purchased surface water | Boulder | St. Vrain Creek |
| MERIDIAN LAKE PARK | 250 | Surface water | Gunnison | East River Basin |
| MESA ANTERO SUBD | 250 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| MONUMENT MEADOW VILLAGE MHP | 250 | Purchased groundwater | El Paso | no boundary on file |
| NORTHWAY MHP | 250 | Groundwater | no boundary on file | |
| OLDE STAGE WD | 250 | Groundwater | Boulder | St. Vrain Creek |
| PIONEER MOBILE HOME PARK | 250 | Purchased surface water | Adams | no boundary on file |
| STEWART MESA WC | 250 | Purchased groundwater under the influence | Delta | North Fork/Tribs. |
| WARM SPRINGS OWNERS MUTUAL WA | 250 | Groundwater | Park | Upper South Platte |
| WOODLAND WEST WUA | 250 | Groundwater | Teller | no boundary on file |
| TRAIL WEST ASSOC | 249 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| HESPERIA MHP LLC | 248 | Groundwater | no boundary on file | |
| TREE HAUS MD | 248 | Groundwater under the influence of surface water | Routt | no boundary on file |
| DEUTSCH DOMESTIC WATER | 246 | Groundwater | Delta | no boundary on file |
| BRITANIE RIDGE WS | 245 | Groundwater | Elbert | no boundary on file |
| HASTY WATER AUTHORITY | 244 | Groundwater | Bent | Arkansas: Las Animas to Stateline |
| AMERICASA AT CYPRESS MEADOWS | 240 | Groundwater | no boundary on file | |
| CHATEAU CHAPARREL CG | 240 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| STONETOWN WINDFERN OAKS | 240 | Groundwater | no boundary on file | |
| SUGAR CITY TOWN OF | 240 | Groundwater | Crowley | Arkansas: Fowler to Las Animas |
| COALBY DOMESTIC WC | 239 | Groundwater under the influence of surface water | Delta | no boundary on file |
| FLORIDA RIVER ESTATES HOA INC | 239 | Groundwater under the influence of surface water | La Plata | Animas River Basin |
| ROSA JOINT VENTURES WATER SYSTEM | 239 | Groundwater | no boundary on file | |
| LOUVIERS WSD | 238 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| THE MEADOWS | 238 | Purchased groundwater | no boundary on file | |
| SPRINGRIDGE SUBD | 237 | Groundwater | Garfield | no boundary on file |
| WESTSIDE MHP | 236 | Groundwater | La Plata | no boundary on file |
| ECKLEY TOWN OF | 235 | Groundwater | Yuma | Arikaree River |
| MERINO TOWN OF | 235 | Groundwater | Logan | South Platte: Balzac to Stateline |
| SUNLIGHT VIEW WWW COMPANY | 234 | Groundwater | Garfield | Roaring Fork River Basin |
| MAJESTIC MHP | 232 | Purchased surface water | Jefferson | no boundary on file |
| EAST VALLEY MD | 230 | Groundwater | Arapahoe | South Platte Cheesman to Denver Gage |
| ELK MEADOWS ESTATES | 230 | Groundwater under the influence of surface water | Ouray | Upper Uncompahgre River |
| WARD TOWN OF | 230 | Groundwater | Boulder | St. Vrain Creek |
| MOUNTAINDALE CG AND CABINS | 228 | Groundwater | Fremont | Arkansas: Salida to Portland |
| SEDGWICK TOWN OF | 227 | Groundwater | Sedgwick | South Platte: Balzac to Stateline |
| COVINGTON ACRES MHP | 226 | Groundwater | no boundary on file | |
| ASPEN MESA ESTATES | 225 | Groundwater | Eagle | Roaring Fork River Basin |
| HOLLAND HILLS MD | 225 | Groundwater | Pitkin | Roaring Fork River Basin |
| ROCK CREEK MESA | 225 | Surface water | El Paso | Fountain Creek |
| COUNTRY ACRES MHP (LA SALLE COUNTY) | 222 | Groundwater | no boundary on file | |
| PRAIRIE ESTATES | 220 | Groundwater | El Paso | Fountain Creek |
| WOODY CREEK METROPOLITAN DISTRICT | 220 | Groundwater | Pitkin | Roaring Fork River Basin |
| CATAMOUNT MD LAKE PROPERTY | 219 | Groundwater under the influence of surface water | Routt | no boundary on file |
| ARRIBA TOWN OF | 216 | Groundwater | Lincoln | Republican River |
| FALLS CREEK RANCH | 215 | Groundwater | La Plata | Animas River Basin |
| KOURY TRANSPORT wholesaler | 215 | Purchased surface water | Pueblo | no boundary on file |
| SEDALIA WSD | 215 | Groundwater under the influence of surface water | Douglas | South Platte Cheesman to Denver Gage |
| BERKLEY OAKS LLC | 213 | Groundwater | no boundary on file | |
| OAK GROVE MOBILE HOME PARK | 213 | Groundwater | no boundary on file | |
| MOUNTAIN VIEW MHP | 211 | Purchased surface water | Boulder | no boundary on file |
| RIVIERE ESTATES | 211 | Groundwater | Rio Grande | no boundary on file |
| GREETVILLE CARBONDALE WATER | 210 | Purchased surface water | Las Animas | Purgatoire River |
| HAPPY SCENES WS INC | 209 | Groundwater | La Plata | Los Pinos River Basin |
| RIVERDALE PEAKS II MD | 209 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| UNION PACIFIC RAILROAD CO.-KEENE WATER | 208 | Purchased groundwater | no boundary on file | |
| LAFAYETTE GARDENS | 207 | Purchased surface water | Boulder | no boundary on file |
| BUCKHORN RANCH WS | 205 | Groundwater under the influence of surface water | Gunnison | East River Basin |
| BARR LAKE RVP | 204 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| GRANBY JONES MHP | 201 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| ASPEN TERRACE MOBILE PARK | 200 | Purchased surface water | Denver | no boundary on file |
| BUTTERMILK MD | 200 | Purchased surface water | Pitkin | Roaring Fork River Basin |
| CATHEDRAL WC | 200 | Groundwater under the influence of surface water | Delta | no boundary on file |
| CLEARWATER MD | 200 | Groundwater | Elbert | South Platte: Denver Gage to Greeley |
| DURANGO REGENCY MHP | 200 | Groundwater | La Plata | Animas River Basin |
| HAMILTON CREEK MD | 200 | Surface water | Summit | no boundary on file |
| HIGH PLAINS WUA | 200 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| LA VIDA MISSION COMMUNITY WATER SUPPLY | 200 | Groundwater | no boundary on file | |
| MOUNTAIN MAN WATER SERVICE | 200 | Purchased surface water | no boundary on file | |
| MOUNTAIN VALLEY ESTATES | 200 | Groundwater | Lake | no boundary on file |
| OAK MEADOWS MHP | 200 | Purchased surface water | Montezuma | no boundary on file |
| PARADOX PIPELINE CO | 200 | Groundwater | Montrose | Paradox Creek |
| PHIPPSBURG TOWN OF | 200 | Groundwater under the influence of surface water | Routt | Upper Yampa River |
| RED ROCK VALLEY WD | 200 | Groundwater under the influence of surface water | El Paso | Fountain Creek |
| SWANS NEST MD | 200 | Groundwater under the influence of surface water | Summit | Blue River Basin |
| TIMBERS WSD | 200 | Surface water | Routt | Upper Yampa River |
| TRINIDAD LAKE RANCHES POA | 200 | Purchased surface water | Las Animas | no boundary on file |
| VISTA VERDE VILLAGE | 200 | Purchased surface water | McElmo Creek Basin | |
| BETHUNE TOWN OF | 195 | Groundwater | Kit Carson | Republican River |
| GLENVIEW OWNERS ASSOC | 195 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| SAGE POINTE HOA | 194 | Groundwater | Logan | South Platte: Balzac to Stateline |
| MOUNTAIN VIEW MOBILE HOME PARK | 193 | Purchased surface water | Montrose | no boundary on file |
| OPHIR TOWN OF | 193 | Surface water | San Miguel | San Miguel River Basin |
| SAGE CREEK CANYON CORP | 192 | Groundwater | Summit | no boundary on file |
| CASTLE PARK MHP | 191 | Purchased surface water | Douglas | no boundary on file |
| BEAR CREEK LOA | 190 | Groundwater under the influence of surface water | Conejos | Conejos Creek |
| MAPLE CREST MANOR MHP | 190 | Purchased surface water | no boundary on file | |
| CROWLEY TOWN OF | 188 | Purchased groundwater | Crowley | Arkansas: Fowler to Las Animas |
| CROOK TOWN OF | 182 | Groundwater | Logan | South Platte: Balzac to Stateline |
| BLUE SKY RANCH INC ASSOC OF OWNERS | 180 | Groundwater | La Plata | Animas River Basin |
| GREELEY MOBILE MANOR | 180 | Purchased surface water | Weld | no boundary on file |
| GREEN ACRES MOBILE HOME PARK | 180 | Purchased surface water | Weld | no boundary on file |
| K & K MANUFACTURED HOME COMMUNITY | 180 | Purchased groundwater | no boundary on file | |
| OAK MEADOWS SERVICE COMPANY | 180 | Groundwater | Garfield | Roaring Fork River Basin |
| PERENFRA TX 586 | 180 | Groundwater | no boundary on file | |
| REDSTONE WSD | 180 | Surface water | Pitkin | Roaring Fork River Basin |
| SILVER PLUME TOWN OF | 180 | Surface water | Clear Creek | Clear Creek |
| TRANQUIL ACRES WS | 180 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| LAZEAR DOMESTIC WC | 178 | Groundwater | Delta | North Fork/Tribs. |
| CLOVERLEAF MOBILE HOME PARK | 175 | Groundwater | no boundary on file | |
| PRAIRIE VIEW POA | 175 | Groundwater | Adams | South Platte: Greeley to Balzac |
| TRAVOIS HOA | 175 | Groundwater | Arapahoe | South Platte Cheesman to Denver Gage |
| ELEGANT HILLS MHP | 170 | Purchased surface water | Montezuma | McElmo Creek Basin |
| GREEN ACRES MHP | 170 | Groundwater | no boundary on file | |
| MT ELBERT WA | 170 | Groundwater | Lake | Arkansas: Headwaters to Salida |
| ALPENSEE WD | 168 | Groundwater | Summit | no boundary on file |
| RUEDI SHORES MD | 165 | Groundwater | Eagle | Roaring Fork River Basin |
| SHADY LANE MHP | 165 | Purchased surface water | Adams | no boundary on file |
| WESTCREEK LAKES WD | 165 | Groundwater under the influence of surface water | Douglas | South Platte Cheesman to Denver Gage |
| CREEKSIDE SOUTH ESTATES METRO DISTRICT | 160 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| GATEWAY MD | 160 | Groundwater | Pitkin | Roaring Fork River Basin |
| MIDWAY VILLAGE MOBILE HOME PARK | 160 | Groundwater | no boundary on file | |
| NEWELL WARNOCK WA | 160 | Surface water | Larimer | Big Thompson River |
| NO NAME CREEK WS | 160 | Groundwater | Garfield | Roaring Fork River Basin |
| VONA TOWN OF | 160 | Groundwater | Kit Carson | Republican River |
| WAGON WHEEL MHP | 160 | Groundwater | Alamosa | no boundary on file |
| FARMERS KORNER MHP | 159 | Groundwater | Summit | Blue River Basin |
| ALPINE LAKES RANCH WC | 158 | Purchased surface water | Archuleta | San Juan River Basin |
| SERENITY RIDGE VAULT CONNECTION | 157 | Purchased surface water | Big Thompson River | |
| SUNSET HILLS MOBILE PARK | 157 | Purchased surface water | El Paso | no boundary on file |
| RIVERBEND WATER AND SEWER COMPANY | 156 | Groundwater | Garfield | Divide Creek |
| STEWARTS MOBILE HOME PARK | 156 | Purchased surface water | Weld | no boundary on file |
| HIDDEN VALLEY WATER DISTRICT | 155 | Purchased surface water | Jefferson | Bear Creek |
| BEEHIVE WATER ASSOCIATION | 154 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| EASY WATER LLC | 154 | Purchased surface water | La Plata River Basin | |
| GROVER TOWN OF | 154 | Groundwater | Weld | South Platte: Greeley to Balzac |
| GENOA TOWN OF | 153 | Groundwater under the influence of surface water | Lincoln | Arikaree River |
| AGATE WA | 152 | Groundwater | Elbert | South Platte: Greeley to Balzac |
| BRISTOL WSD | 151 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| 4 WAY RANCH MD 2 | 150 | Groundwater | El Paso | Fountain Creek |
| ASPEN MTN VIEW SUBD | 150 | Groundwater | Eagle | Roaring Fork River Basin |
| BLUE RIVER VALLEY RANCH LAKES | 150 | Groundwater | Summit | Blue River Basin |
| CAMPO TOWN OF | 150 | Groundwater | Baca | Cimarron River Basin |
| DURANGO NORTH VILLAGE | 150 | Purchased groundwater | La Plata | no boundary on file |
| ESTATES AT BROMLEY | 150 | Groundwater | Adams | no boundary on file |
| HEENEY WATER DISTRICT | 150 | Groundwater | Summit | Blue River Basin |
| KNOLLS AT DURANGO HOA | 150 | Groundwater | La Plata | Animas River Basin |
| LITTLE ELK CREEK | 150 | Groundwater under the influence of surface water | Pitkin | Roaring Fork River Basin |
| MEADOW VILLAGE MOBILE HOME PARK | 150 | Purchased surface water | Weld | no boundary on file |
| NARROW GAUGE MHP | 150 | Purchased surface water | La Plata | no boundary on file |
| PRINCETON ESTATES SUBD | 150 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| SANS SOUCI COOPERATIVE | 150 | Groundwater under the influence of surface water | Boulder | Boulder Creek |
| SHIRE MOBILE HOME PARK | 150 | Purchased surface water | Weld | no boundary on file |
| SLEEPY BEAR MHP | 150 | Groundwater under the influence of surface water | Routt | no boundary on file |
| STAGE RUN HOA | 150 | Groundwater | Arapahoe | South Platte Cheesman to Denver Gage |
| TELGE MANOR MHP | 150 | Groundwater | no boundary on file | |
| SHERIDAN LAKE WD | 148 | Groundwater | Kiowa | Arkansas: Las Animas to Stateline |
| NAVAJO WESTERN WATER DISTRICT ESTATES | 145 | Groundwater | Huerfano | no boundary on file |
| SPRING VIEW TP | 145 | Groundwater | Montrose | no boundary on file |
| ISLAND COVE PARK | 143 | Purchased surface water | La Plata | no boundary on file |
| CANYON CREEK ESTATES | 140 | Groundwater | Garfield | Rifle/Elk/Parachute Creeks |
| CRESTWOOD ESTATES | 140 | Groundwater | Adams | no boundary on file |
| KEN CARYL WEST RANCH WD | 140 | Groundwater | Jefferson | Bear Creek |
| PARADISE VILLAGE COOP MOBILE HOME PARK | 140 | Purchased surface water | Weld | no boundary on file |
| PRAIRIE VIEW RANCH WD | 140 | Groundwater | Morgan | no boundary on file |
| RIVER RANCH VILLAGE MHP LLC | 140 | Purchased surface water | Grand | no boundary on file |
| SPANISH PEAKS VILLAGE TRACT II WA | 138 | Groundwater | Huerfano | Cucharas River |
| TURKEY CANON RANCH WD | 138 | Groundwater | El Paso | Arkansas: Salida to Portland |
| VILAS TOWN OF | 137 | Groundwater | Baca | Arkansas: Las Animas to Stateline |
| NORTHSTAR MOBILE HOME PARK | 136 | Purchased surface water | Larimer | no boundary on file |
| GOLDEN POND VILLAGE MHP | 135 | Groundwater | no boundary on file | |
| ROSEWOOD HILLS PROPERTY HOA | 135 | Purchased surface water | Teller | South Platte Cheesman to Denver Gage |
| STORM KING MHP | 135 | Purchased surface water | Garfield | no boundary on file |
| TRINIDAD MANUFACTURED HOME COMMUNITY | 133 | Purchased surface water | Las Animas | no boundary on file |
| GOLD RUSH WC | 132 | Purchased surface water | Teller | no boundary on file |
| HUAJATOLLA VALLEY ESTATES INC | 132 | Groundwater under the influence of surface water | Huerfano | Cucharas River |
| SAN BERNARDO HOA | 132 | Groundwater | San Miguel | San Miguel River Basin |
| SEABOARD FOODS LLC | 132 | Groundwater | Yuma | Arikaree River |
| SHADOW MOUNTAIN MOBILE HOME PARK | 132 | Purchased surface water | El Paso | no boundary on file |
| BELLA VISTA | 131 | Purchased surface water | Weld | no boundary on file |
| BRANSON TOWN OF | 131 | Groundwater under the influence of surface water | Las Animas | Purgatoire River |
| CEDAR VILLAGE MHP | 130 | Purchased surface water | Arapahoe | no boundary on file |
| COMMERCE HEIGHTS | 130 | Purchased groundwater | Adams | no boundary on file |
| DAKOTA RIDGE HOA | 130 | Groundwater | Routt | Upper Yampa River |
| GALAMBS MOBILE HOME AND RV PARK | 130 | Groundwater | Adams | South Platte: Greeley to Balzac |
| GREEN ACRES MHP | 130 | Groundwater under the influence of surface water | Eagle | Eagle River Basin |
| RAINBOW VALLEY WD | 130 | Surface water | Teller | Arkansas: Salida to Portland |
| RIVERMAZE COOP MHP | 128 | Purchased surface water | Fremont | no boundary on file |
| BUFFALO CREEK WD | 125 | Surface water | Jefferson | North Fork of South Platte |
| ELK RUN HOMEOWNERS CORPORATION | 125 | Groundwater | San Miguel | San Miguel River Basin |
| MEADOWLARK MOBILE HOME PARK | 125 | Purchased surface water | Larimer | no boundary on file |
| MEADOWOOD VILLAGE MHP | 125 | Purchased surface water | Arapahoe | no boundary on file |
| PINYON MESA HOA | 125 | Purchased groundwater | Roaring Fork River Basin | |
| PRITCHETT TOWN OF | 125 | Groundwater | Baca | Arkansas: Las Animas to Stateline |
| RAMAH TOWN OF | 125 | Groundwater | El Paso | Arkansas: Las Animas to Stateline |
| VROMAN WC | 125 | Groundwater | Otero | no boundary on file |
| WOODLAND PARK AND SALES | 125 | Groundwater | no boundary on file | |
| FOXHILL MD | 123 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| NORTH BREEZE MHP | 123 | Groundwater | no boundary on file | |
| PLEASANT VIEW ESTATES | 122 | Purchased surface water | Jefferson | no boundary on file |
| SIERRA BONITA ESTATES | 122 | Purchased surface water | Arapahoe | no boundary on file |
| APACHE MHP | 120 | Purchased surface water | La Plata | no boundary on file |
| COKEDALE TOWN OF | 120 | Purchased surface water | Purgatoire River | |
| DALLAS MEADOWS COMMUNITY ASSOC | 120 | Groundwater | Ouray | Upper Uncompahgre River |
| HIDDEN VALLEY HOA WATER COMPANY | 120 | Purchased surface water | North Fork/Tribs. | |
| LOS RANCHITOS HOA | 120 | Groundwater | La Plata | Animas River Basin |
| OLD HOMESTEAD MHP | 120 | Groundwater | La Plata | Animas River Basin |
| PANORAMA RANCHES HOA | 120 | Groundwater | Garfield | Roaring Fork River Basin |
| PIONEER LOOKOUT WD | 120 | Groundwater | El Paso | Fountain Creek |
| RIVERSIDE MHP, LLC | 120 | Purchased groundwater | no boundary on file | |
| SIERRA VISTA HOA | 120 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| UTE PASS WA INC | 120 | Surface water | La Plata | no boundary on file |
| WILLOW BROOK METRO DISTRICT | 120 | Groundwater | Summit | no boundary on file |
| LARKSPUR SUBD | 118 | Groundwater | Gunnison | East River Basin |
| BREEZY KNOLL COMMUNITY | 116 | Groundwater | no boundary on file | |
| KIM TOWN OF | 116 | Groundwater | Las Animas | Cimarron River Basin |
| COUNTRY GARDENS MHP | 115 | Groundwater | Arapahoe | South Platte: Greeley to Balzac |
| MOUNTAIN MEADOWS | 115 | Groundwater | Garfield | Roaring Fork River Basin |
| NEIGHBORS OF DREAMLAND MHP | 115 | Purchased surface water | Pueblo | no boundary on file |
| SUBURBAN ESTATES MHP | 115 | Purchased surface water | no boundary on file | |
| MARBLE WC | 113 | Groundwater | Gunnison | Roaring Fork River Basin |
| SKI TOWN VILLAGE | 113 | Groundwater under the influence of surface water | Gunnison | Tomichi Creek |
| FIRST POINT MOBILE COURT | 110 | Groundwater | no boundary on file | |
| INDIAN TRAILS WATER LLC | 110 | Groundwater | Rio Grande | Rio Grande |
| W BAR K MOBILE HOME PARK | 110 | Purchased surface water | no boundary on file | |
| NEBRASKAN MANUFACTURED HOME COMMUNITY | 108 | Purchased groundwater | no boundary on file | |
| PEAK VIEW PARK LLC | 106 | Groundwater | Teller | Fountain Creek |
| MINEOTA ESTATES HOA | 105 | Groundwater | Garfield | no boundary on file |
| MONTROSE TRAILER PARK | 105 | Groundwater | no boundary on file | |
| KARVAL WATER USERS INC | 102 | Groundwater | Lincoln | Arkansas: Fowler to Las Animas |
| A AND B WA INC | 100 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| CHANCELLORS MHC | 100 | Purchased groundwater | El Paso | no boundary on file |
| COUNTRY HOMES LAND CO | 100 | Purchased surface water | Arapahoe | South Platte Cheesman to Denver Gage |
| CRYSTAL VALLEY | 100 | Groundwater | Garfield | no boundary on file |
| DURANGO JCMHP, LLC | 100 | Groundwater under the influence of surface water | La Plata | Animas River Basin |
| GARCIA DOMESTIC WUA | 100 | Groundwater | Costilla | Culebra Creek |
| KINGS ROW HOA | 100 | Groundwater | Garfield | Roaring Fork River Basin |
| MILNER PARK | 100 | Groundwater | Routt | Middle Yampa River |
| MORAINE PARK WS | 100 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| MOUNTAIN VISTA VILLAGE | 100 | Groundwater | Chaffee | Arkansas: Salida to Portland |
| NATIVE WATER | 100 | Purchased surface water | no boundary on file | |
| NEW DOVER ESTATES | 100 | Groundwater | no boundary on file | |
| PINON PINES PROPERTY LLC | 100 | Groundwater | Chaffee | no boundary on file |
| PONDEROSA PARK ASSOC | 100 | Groundwater | Gunnison | East River Basin |
| SOMERSET DOMESTIC WD | 100 | Groundwater under the influence of surface water | Gunnison | North Fork/Tribs. |
| SPRING VALLEY MUTUAL WA | 100 | Groundwater | Boulder | Boulder Creek |
| WEST GRAND VALLEY WA | 100 | Groundwater | Otero | no boundary on file |
| ARAPAHOE WC | 99 | Groundwater | Cheyenne | Republican River |
| HERMOSA VILLAGE | 98 | Groundwater | La Plata | Animas River Basin |
| GOODMAN POA | 96 | Groundwater | La Plata | Animas River Basin |
| LAST DOLLAR PUD | 96 | Groundwater | San Miguel | no boundary on file |
| NEIGHBORS OF 7TH STREET MHP | 96 | Purchased surface water | Montezuma | no boundary on file |
| PATTERSON VALLEY WC | 96 | Groundwater | Otero | no boundary on file |
| WIDE ACRES MHP | 96 | Purchased surface water | Delta | no boundary on file |
| CHERRY ACRES MHP | 95 | Purchased groundwater under the influence | Delta | no boundary on file |
| SWISS VILLAGE HOA | 95 | Groundwater | Pitkin | Roaring Fork River Basin |
| VALLEY WEST PARK | 93 | Purchased groundwater | La Plata | no boundary on file |
| WESTBANK MESA HOA | 93 | Groundwater | Garfield | Roaring Fork River Basin |
| FORREST GROVE ESTATES | 92 | Groundwater | La Plata | Animas River Basin |
| DEERWOOD SERVICE COMPANY LLC | 91 | Groundwater | Routt | no boundary on file |
| BUFFALO RIDGE ESTATES | 90 | Groundwater | Weld | no boundary on file |
| EXCELL LAWSON VILLAGE | 90 | Groundwater | Clear Creek | Clear Creek |
| GRANDVIEW MHP | 90 | Groundwater | El Paso | Fountain Creek |
| HERONS NEST RV PARK | 90 | Groundwater | Garfield | no boundary on file |
| INLAND HOUSE CONDOMINIUM ASSOCIATION | 90 | Groundwater | no boundary on file | |
| LIGHTNER CREEK MHP | 90 | Groundwater | La Plata | Animas River Basin |
| MILLARD MOBILE HOME PARK | 90 | Groundwater | Montrose | no boundary on file |
| NORTH WASHINGTON WUA | 90 | Groundwater | Adams | no boundary on file |
| PARK WC WONDERVIEW | 90 | Groundwater | Jefferson | Bear Creek |
| RED TABLE ACRES HOA | 90 | Groundwater | Eagle | Roaring Fork River Basin |
| RIFLE CREEK ESTATES HOA | 90 | Groundwater | Garfield | no boundary on file |
| RIVER VILLAGE LLC | 90 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| RIVERSIDE WC | 90 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| SHAMBHALA MOUNTAIN CENTER | 90 | Groundwater under the influence of surface water | Larimer | Cache La Poudre River |
| THIRD CREEK WUA | 90 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| TUCSON WC | 90 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| FREEMAN CREEK | 88 | Groundwater under the influence of surface water | La Plata | Los Pinos River Basin |
| HOMESTEAD IMPROVEMENT ASSOCIATION INC | 87 | Purchased groundwater | Otero | no boundary on file |
| DEEP CREEK CREEDE HAVEN | 86 | Groundwater | Mineral | Rio Grande |
| MAZOMANIE MHP | 85 | Groundwater | no boundary on file | |
| MISSOURI MEADOWS COMMUNITY INC | 85 | Purchased surface water | no boundary on file | |
| VALLEY MOBILE HOME LLC | 85 | Groundwater | Alamosa | Rio Grande |
| COLDWATER DAIRY | 84 | Groundwater | no boundary on file | |
| COYOTE HILLS WS | 84 | Groundwater | Elbert | South Platte Cheesman to Denver Gage |
| RIDGEWOOD WD | 84 | Groundwater | Teller | South Platte Cheesman to Denver Gage |
| TELLER SPRINGS HOA | 84 | Groundwater | Garfield | Roaring Fork River Basin |
| EAGLES WATCH HOA | 83 | Groundwater | Jackson | North Platte River Basin |
| HIDDEN LAKE COMMUNITY | 83 | Purchased surface water | no boundary on file | |
| RIVER-DALE RANCH | 83 | Surface water | Park | North Fork of South Platte |
| DERBY VILLAGE MOBILE HOME PARK | 81 | Purchased groundwater | Adams | no boundary on file |
| ALPINE VILLAGE MHP | 80 | Groundwater | Teller | no boundary on file |
| ASGARD SUBDIVISION WA | 80 | Purchased surface water | Garfield | no boundary on file |
| EDEN VALLEY INSTITUTE | 80 | Surface water | Larimer | Big Thompson River |
| EL ROCKO MHP | 80 | Groundwater | Garfield | Roaring Fork River Basin |
| FORTUNE BRANCH VILLAGE MHP | 80 | Groundwater | no boundary on file | |
| OCONTO FALLS MHP | 80 | Groundwater | no boundary on file | |
| SATANK WA | 80 | Purchased surface water | Garfield | Roaring Fork River Basin |
| MT PRINCETON HOA | 79 | Purchased groundwater | Chaffee | no boundary on file |
| NORTH VALLEY SUBDIVISION UTILITY COMPANY | 79 | Groundwater | Gunnison | Tomichi Creek |
| ORCHARD PARK WA INC | 78 | Purchased surface water | Fremont | Arkansas: Salida to Portland |
| SUNSHINE ACRES MHP | 78 | Purchased surface water | Larimer | no boundary on file |
| TWILIGHT WC | 78 | Groundwater | La Plata | Animas River Basin |
| BRIGHTON VILLAGE LLC | 77 | Purchased surface water | Adams | no boundary on file |
| FOREST GLEN SPORTS ASSOC INC | 76 | Groundwater | Teller | Upper South Platte |
| MEADOW MTN WATER SUPPLY | 76 | Surface water | Boulder | no boundary on file |
| SUNSHINE MESA DOMESTIC WC | 76 | Groundwater | Delta | no boundary on file |
| FAYETTE WC | 75 | Groundwater | Otero | no boundary on file |
| LARK MEADOWS WA | 75 | Groundwater | Boulder | Boulder Creek |
| LMP COOP MHP | 75 | Purchased surface water | Boulder | no boundary on file |
| MOUNTAIN VIEW ESTATES (KNECHT INVTS) | 75 | Groundwater | no boundary on file | |
| OLYMPIC VILLAGE | 75 | Groundwater | Grand | Upper Colorado/Fraser Rivers |
| PINON HILLS WATER USERS ASSOCIATION | 75 | Groundwater | Huerfano | no boundary on file |
| SUN MEADOW ESTATES | 75 | Groundwater | Garfield | Rifle/Elk/Parachute Creeks |
| SUNRISE RANCH | 75 | Surface water | Larimer | Big Thompson River |
| TABLE MESA VILLAGE MHP | 75 | Groundwater under the influence of surface water | Boulder | Boulder Creek |
| DIVIDE SOUTH | 74 | Groundwater under the influence of surface water | Teller | no boundary on file |
| CASA DEL RIO SUBD | 73 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| NEW RAYMER TOWN OF | 73 | Groundwater | Weld | South Platte: Balzac to Stateline |
| BIG PINES CAMPGROUND | 72 | Groundwater | El Paso | Fountain Creek |
| ELEVEN MILE RANCH ASSOCIATION | 72 | Surface water | Park | no boundary on file |
| MINNESOTA PIPELINE | 72 | Purchased surface water | North Fork/Tribs. | |
| WESTERN INN MHP | 72 | Groundwater | Clear Creek | no boundary on file |
| EAST END WA | 70 | Groundwater | Otero | no boundary on file |
| FOUR MILE RANCH HOA | 70 | Groundwater | Garfield | no boundary on file |
| HAMMOND PIPELINE | 70 | Purchased groundwater under the influence | Delta | North Fork/Tribs. |
| KEETON RANCH WATER | 70 | Purchased surface water | El Paso | no boundary on file |
| KK WATER ASSOC | 70 | Groundwater | Pitkin | Roaring Fork River Basin |
| WHITE HORSE SPRINGS WD | 70 | Groundwater | Pitkin | Roaring Fork River Basin |
| UTE HEIGHTS COMMUNITY WS | 69 | Groundwater | Chaffee | Arkansas: Headwaters to Salida |
| LAPLATA VISTA ESTATES HOA | 68 | Purchased surface water | La Plata | no boundary on file |
| MARABOU HOA | 68 | Groundwater | Routt | no boundary on file |
| TRES VALLES WEST | 68 | Groundwater under the influence of surface water | Huerfano | no boundary on file |
| MILL CREEK WIA | 67 | Surface water | Clear Creek | no boundary on file |
| PEAKS SHADOW LLC | 67 | Groundwater | El Paso | Fountain Creek |
| SAN JUAN RANCH ESTATES ASSOCIATION, INC | 67 | Groundwater | Hinsdale | Upper Gunnison River |
| SIGNAL MOUNTAIN RANCH PROPERTY OWNERS WC | 66 | Groundwater | Pueblo | no boundary on file |
| PINE LAKE VILLAGE | 65 | Purchased surface water | Weld | no boundary on file |
| PINEWOOD MOBILE HOME PARK | 65 | Purchased surface water | Larimer | no boundary on file |
| ORCHARD ESTATES | 64 | Groundwater | Pitkin | no boundary on file |
| TWO BUTTES TOWN OF | 64 | Groundwater | Baca | Arkansas: Las Animas to Stateline |
| HOPE DITCH CO | 63 | Groundwater | Adams | South Platte: Denver Gage to Greeley |
| LIONS RIDGE ESTATES | 63 | Groundwater under the influence of surface water | Garfield | Roaring Fork River Basin |
| WESTWINDS WD | 63 | Groundwater | Chaffee | no boundary on file |
| ESCALANTE VILLAGE | 62 | Purchased surface water | no boundary on file | |
| GINTERS GROVE DOMESTIC WATER CORP | 62 | Purchased surface water | Delta | North Fork/Tribs. |
| STARKVILLE TOWN OF | 62 | Purchased surface water | Purgatoire River | |
| HARTMAN TOWN OF | 61 | Groundwater | Prowers | Arkansas: Las Animas to Stateline |
| CAMELOT PROPERTY OWNERS ASSOC | 60 | Groundwater | El Paso | no boundary on file |
| ELEPHANT ROCK MHP | 60 | Groundwater | El Paso | Fountain Creek |
| HEARTWOOD CO OP HOUSING | 60 | Groundwater | La Plata | Los Pinos River Basin |
| MAD DOG WC | 60 | Groundwater under the influence of surface water | Delta | North Fork/Tribs. |
| SIERRA VERDE WATER INC. | 60 | Groundwater | La Plata | Animas River Basin |
| SUNRISE TRAILER PARK | 60 | Groundwater | Montrose | Lower Uncompahgre River |
| TALL PINES VILLAGE | 60 | Groundwater under the influence of surface water | La Plata | no boundary on file |
| TANGLEWOOD WS | 60 | Groundwater | Summit | Blue River Basin |
| WILLIAMS CREEK WATER | 60 | Purchased surface water | no boundary on file | |
| SAWPIT TOWN OF | 59 | Groundwater | San Miguel | San Miguel River Basin |
| LAKESHORE MOBILE HOME PARK | 58 | Groundwater | Grand | no boundary on file |
| NORTH HOLBROOK WC | 58 | Groundwater | Otero | Arkansas: Fowler to Las Animas |
| WEST PAONIA DOMESTIC WATER COMPANY | 57 | Purchased surface water | North Fork/Tribs. | |
| MOUNTAIN SHADOWS MHP | 56 | Purchased groundwater | El Paso | no boundary on file |
| PEYTON PINES | 56 | Groundwater | El Paso | Fountain Creek |
| WHITE HAVEN MHP | 56 | Groundwater | Routt | Upper Yampa River |
| HASWELL TOWN OF | 55 | Groundwater | Kiowa | Arkansas: Fowler to Las Animas |
| NORTHSIDE VILLAGE MHP | 55 | Purchased surface water | Adams | no boundary on file |
| RIVERBEND CABINS | 55 | Groundwater | Routt | no boundary on file |
| RIVERVIEW SUBD | 55 | Groundwater | Garfield | no boundary on file |
| SADDLE RIDGE RANCH ESTATES WC | 55 | Groundwater under the influence of surface water | Gunnison | no boundary on file |
| VALLEY MAINT CORP NO 2 | 55 | Groundwater under the influence of surface water | Teller | South Platte Cheesman to Denver Gage |
| HOLBROOK CENTER SOFT WA | 54 | Groundwater | Otero | no boundary on file |
| LAZY DAYS MHV | 51 | Purchased groundwater under the influence | El Paso | no boundary on file |
| LITTLE PARK WATER COOP | 51 | Purchased surface water | Mesa | no boundary on file |
| VALLEY VISTA ESTATES | 51 | Groundwater | Adams | no boundary on file |
| CRAGMONT WC | 50 | Surface water | Jefferson | Bear Creek |
| CROSS L ESTATES | 50 | Groundwater | Rio Blanco | White River Basin |
| FOX ESTATES HOA | 50 | Groundwater | Routt | no boundary on file |
| GRACE MAR WUA | 50 | Groundwater | Boulder | no boundary on file |
| OAK MEADOWS WATER ASSOCIATION | 50 | Purchased groundwater | Garfield | no boundary on file |
| OVERLOOK MUTUAL WC | 50 | Groundwater | El Paso | Fountain Creek |
| PINON WSD | 50 | Purchased surface water | Purgatoire River | |
| PRINCE CREEK VILLAGE HOA | 50 | Groundwater | Pitkin | Roaring Fork River Basin |
| SHAWNEE WCA | 50 | Groundwater under the influence of surface water | Park | Upper South Platte |
| THREE MILE TP | 50 | Groundwater | Garfield | no boundary on file |
| VALLEY AT WINTER PARK WD | 50 | Groundwater | Grand | no boundary on file |
| VALLI HI MHP | 50 | Groundwater | Clear Creek | no boundary on file |
| CROWLEY RANCH RESERVE | 49 | Groundwater under the influence of surface water | Archuleta | no boundary on file |
| DEER RUN MOBILE HOME COMMUNITY | 49 | Groundwater | no boundary on file | |
| MOOSE HAVEN CONDOS | 48 | Groundwater | Lake | no boundary on file |
| VALENCIA STORAGE AND MHP | 48 | Groundwater | no boundary on file | |
| CATTLE CREEK WUA | 47 | Groundwater under the influence of surface water | Garfield | Roaring Fork River Basin |
| RIVER GREEN POA | 47 | Groundwater | no boundary on file | |
| SOUTH LAMBORN MESA WATER COMPANY | 47 | Purchased surface water | North Fork/Tribs. | |
| LOS PRADOS HOA | 45 | Groundwater | La Plata | no boundary on file |
| MOUNTAIN SHADOWS MOBILE ESTATES | 45 | Groundwater | Pueblo | Saint Charles |
| PERENFRA TX | 45 | Groundwater | no boundary on file | |
| SILVER BONNETT PARK | 45 | Groundwater | El Paso | Fountain Creek |
| VIEJO SAN ACACIO | 45 | Groundwater | Costilla | Culebra Creek |
| FOX HILL WATER ASSOCIATION INC | 44 | Groundwater | Weld | South Platte: Denver Gage to Greeley |
| PHILLIPS MOBILE HOME PARK | 44 | Groundwater | Pitkin | Roaring Fork River Basin |
| PINE RIVER MDCA | 44 | Groundwater under the influence of surface water | no boundary on file | |
| SOUTH SIDE WA | 44 | Groundwater | Otero | no boundary on file |
| VALLEY VIEW PARK MOBILE HOME COMMUNITY | 44 | Purchased groundwater | Custer | no boundary on file |
| PINON HEIGHTS MHP | 43 | Purchased surface water | La Plata | no boundary on file |
| GUADALUPE WA | 42 | Groundwater | Conejos | no boundary on file |
| HAWKRIDGE HOA | 42 | Groundwater | Garfield | no boundary on file |
| PAOLI TOWN OF | 42 | Groundwater | Phillips | Arikaree River |
| SIDNEY PEAK RANCH | 42 | Groundwater | Routt | no boundary on file |
| ERIE MEADOWS | 41 | Purchased surface water | Weld | no boundary on file |
| PITKIN IRON HOA | 41 | Groundwater | Pitkin | no boundary on file |
| VAN DEN BERG MD | 41 | Purchased surface water | La Plata | no boundary on file |
| CHICOSA WATER USERS ASSOCIATION | 40 | Purchased surface water | no boundary on file | |
| CRYSTAL RIVER COUNTRY ESTATES WATER CO | 40 | Groundwater | Pitkin | Roaring Fork River Basin |
| DURANGO FALFA MHC LLC | 40 | Groundwater under the influence of surface water | La Plata | Animas River Basin |
| EARLES SUBDIVISION WC | 40 | Groundwater | Montrose | no boundary on file |
| EASTSIDE MHP | 40 | Groundwater | Chaffee | no boundary on file |
| HARVEST ESTATES (FORMERLY BILLS MHP) | 40 | Groundwater | no boundary on file | |
| NAVAJO RIVER RANCH POA | 40 | Groundwater under the influence of surface water | Archuleta | Navajo River Basin |
| ROLLING PLAINS ESTATE | 40 | Groundwater | Arapahoe | no boundary on file |
| SAN ACACIO DOMESTIC WA | 40 | Groundwater | Costilla | Culebra Creek |
| WAYSIDE | 40 | Groundwater | Summit | Blue River Basin |
| SADDLEHORN RANCH MD | 39 | Groundwater | El Paso | no boundary on file |
| TRIANGLE TP | 39 | Groundwater | La Plata | no boundary on file |
| SPRING PARK MEADOWS | 38 | Groundwater | Eagle | no boundary on file |
| TV HILLS WATER | 38 | Groundwater | Custer | Arkansas: Salida to Portland |
| WOODEN DEER HOA | 38 | Groundwater | Garfield | Roaring Fork River Basin |
| CHAIR MTN RANCH HOA FILING 1 | 37 | Groundwater | Gunnison | North Fork/Tribs. |
| RIVERWOOD MOBILE HOME PARK | 37 | Purchased surface water | Delta | no boundary on file |
| WESTERN EXTENSION DOMESTIC WATER COMPANY | 37 | Purchased surface water | North Fork/Tribs. | |
| FOX RUN MEADOWS HOA | 36 | Groundwater | no boundary on file | |
| PACHECO TRAILER PARK | 36 | Groundwater | Rio Grande | no boundary on file |
| STUCKER MESA DOMESTIC WC | 36 | Groundwater under the influence of surface water | Delta | North Fork/Tribs. |
| 1610 LLC (WILLOW MANOR APTS) | 35 | Groundwater | no boundary on file | |
| MAPLE GROVE WD | 35 | Groundwater | Boulder | Boulder Creek |
| PARK PLACE MHP | 35 | Purchased surface water | Mesa | no boundary on file |
| RIPVIEW COURT 1 | 35 | Groundwater | no boundary on file | |
| RIPVIEW COURT 4 | 35 | Groundwater | no boundary on file | |
| VIEW RIDGE MUTUAL WC | 35 | Groundwater | Douglas | South Platte Cheesman to Denver Gage |
| LAKE SANCHEZ ESTATES | 34 | Groundwater | Costilla | no boundary on file |
| CALLICOTTE RANCH | 33 | Groundwater | Garfield | Roaring Fork River Basin |
| WILDCAT RANCH | 33 | Surface water | Pitkin | no boundary on file |
| RIVERS BEND CONDO ASSOC | 32 | Groundwater | Pitkin | no boundary on file |
| DEEP CREEK MOUNTAIN VALLEY ESTATES | 31 | Groundwater | Mineral | no boundary on file |
| RIPVIEW COURT 2 | 31 | Groundwater | no boundary on file | |
| RIPVIEW COURT 3 | 31 | Groundwater | no boundary on file | |
| G AND M MOBILE HOME PARK | 30 | Groundwater | Rio Grande | no boundary on file |
| IRON CLAD MODULAR HOME PARK | 30 | Purchased surface water | Moffat | no boundary on file |
| MESA MOBILE PARK | 30 | Purchased surface water | La Plata | no boundary on file |
| WATER VIEW CONDOMINIUM ASSOC | 30 | Groundwater | Pitkin | no boundary on file |
| SUNNYSLOPE HOMEOWNERS | 29 | Groundwater | Logan | no boundary on file |
| BUCKSKIN VALLEY SUBDIVISION | 28 | Groundwater | Rio Blanco | no boundary on file |
| WEST RANCH SUBD | 28 | Groundwater | Pitkin | no boundary on file |
| ARAPAHOE MHP | 27 | Groundwater | Clear Creek | no boundary on file |
| HIDDEN SPRINGS RANCH | 27 | Groundwater | Routt | no boundary on file |
| LAZY O RANCH | 27 | Groundwater | Pitkin | Roaring Fork River Basin |
| PEACH VALLEY ORCHARD SUBD | 27 | Groundwater | Garfield | no boundary on file |
| RANCH AT COULTER CREEK HOA | 27 | Groundwater | Garfield | no boundary on file |
| ALPINE MOUNTAIN RANCH MD | 25 | Groundwater under the influence of surface water | Routt | no boundary on file |
| HARVEY MARTINEZ TRAILER COURT | 25 | Purchased surface water | Montrose | no boundary on file |
| LAZY DIAMOND A SUBD | 25 | Groundwater | Garfield | no boundary on file |
| SCENIC SQUARE SUBD | 25 | Groundwater | La Plata | no boundary on file |
| TELLURIDE PINES HOA | 25 | Groundwater under the influence of surface water | San Miguel | no boundary on file |
| WELL ON WHEELS WATER HAULER | 25 | Purchased surface water | La Plata | no boundary on file |
| SANCTUARY OF PEACE POA | 20 | Groundwater | El Paso | no boundary on file |
| FOUNTAIN VALLEY AUTHORITY wholesaler | 13 | Surface water | El Paso | no boundary on file |
| CARTER LAKE FILTER PLANT wholesaler | 11 | Surface water | Larimer | no boundary on file |
| CROWLEY COUNTY WS wholesaler | 0 | Groundwater | Crowley | no boundary on file |
| DOMINION WSD wholesaler | 0 | Purchased surface water | South Platte Cheesman to Denver Gage | |
| GRANBY TOWN OF WEST SERVICE AREA wholesaler | 0 | Groundwater | Grand | no boundary on file |
| JOINT WATER PURIFICATION PLANT wholesaler | 0 | Groundwater | Arapahoe | no boundary on file |
| MID COLORADO INVESTMENT wholesaler | 0 | Groundwater | El Paso | no boundary on file |
| MUSTANG WATER AUTHORITY wholesaler | 0 | Surface water | Montrose | no boundary on file |
| PROJECT 7 WA wholesaler | 0 | Surface water | Montrose | Lower Uncompahgre River |
| SOLDIER CANYON FILTER PLANT wholesaler | 0 | Surface water | Larimer | no boundary on file |
| ST VRAIN WATER AUTHORITY wholesaler | 0 | Groundwater under the influence of surface water | Weld | no boundary on file |
| WISE PROJECT wholesaler | 0 | Purchased surface water | Arapahoe | no boundary on file |
EPA SDWIS federal reporting, fetched 2026-09-08 (quarterly data); 2272 active systems in all, of which the non-community ones (schools, campgrounds, workplaces) are on their own pages but not in this table. Population figures are the systems' own reports and count a wholesaler's customers twice. Rates, per-capita use and the supply portfolio behind each intake are later phases. Report a problem →