Hydrohistorian
City of Greeley
Serves Garden City, Greeley, Evans, Windsor, Timnath.
Its service area also reaches South Platte: Denver Gage to Greeley (23.0%), Big Thompson River (10.0%).
Boundary traced. About 213 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| PURCHASED FROM NORTH WELD CO0162553 | Consecutive connection (purchased) | Surface water · from NORTH WELD COUNTY WD |
| PURCHASED EAST LARIMER CNTYCO0135233 | Consecutive connection (purchased) | Surface water · from EAST LARIMER COUNTY WD |
| PURCHASED CITY OF LOVELAND CO0135485 | Consecutive connection (purchased) | Surface water · from LOVELAND CITY OF |
| BIG THOMPSON GLIC PUMPSTATION | Intake | Surface water |
| PURCHASED FROM CO0135290 | Consecutive connection (purchased) | Surface water · from WEST FORT COLLINS WD |
| HORSETOOTH RESERVOIR | Intake | Surface water |
| BOYD LAKE | Intake | Surface water |
| CACHE LA POUDRE RIVER | Intake | Surface water |
| LAKE LOVELAND | Intake | Surface water |
These are EPA's facility records, not DWR structures. Which decreed rights sit behind an intake is the next phase; nothing here is inferred.
Wholesale connections
Buys water from NORTH WELD COUNTY WD, EAST LARIMER COUNTY WD, LOVELAND CITY OF, WEST FORT COLLINS WD.
Sells water to 17 systems: EAST LARIMER COUNTY WD, LOVELAND CITY OF, COUNTRYSIDE OF GREELEY, COUNTRY ESTATES MOBILE HOME PARK, EVANS CITY OF, FRIENDLY VILLAGE OF GREELEY MHP, GREELEY MOBILE MANOR, JOHNSTOWN TOWN OF, MEADOW VILLAGE MOBILE HOME PARK, MILLIKEN TOWN OF, NORTH WELD COUNTY WD, SHIRE MOBILE HOME PARK, STONEYBROOK MHP, STONEYBROOK POINTE, VILLA WEST, WINDSOR TOWN OF, WOODLANDS EAST.
DWR structures that name this system
Source Probable join · fetched 2026-10-06 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier
3 structures on DWR's record 3 match an EPA intake by name. A match says who DWR lists, not who owns the water: a ditch company can own the headgate while the system owns shares, and a consultant can be the contact. The dossier holds the decree.
| Structure | Type | Source | District | Matched on |
|---|---|---|---|---|
| BOYD LAKE RES 0404110 | 3 | BIG THOMPSON RIVER | Big Thompson River | intake name: BOYD LAKE |
| CACHE LA POUDRE RIVER 0302426 | 0 | CACHE LA POUDRE RIVER | Cache La Poudre River | intake name: CACHE LA POUDRE RIVER |
| CACHE LA POUDRE RIVER 0300000 | 0 | Cache La Poudre River | intake name: CACHE LA POUDRE RIVER |
Compliance record
Source Register of another agency · fetched 2026-10-07 · verify at EPA ECHO ↗
No open violation and no health-based violation on EPA's federal record for this system at the last monthly fetch. That is a record of reported compliance, not a test result: SDWIS carries violations, not routine sample values.
EPA's own summary: violations in 3 of the last 12 quarters. In violation for, in EPA's words: 1009=Chlorite.
No health-based or open violation on the federal record for this system.
What the regulator did about it
16 enforcement actions on this system's federal record. In Colorado the state is the primacy agency, so most actions are the state's; EPA acts directly on tribal systems and when it steps in.
| Date | Action | By |
|---|---|---|
| 2026-01-06 | St Compliance achieved SOX Chlorite samples reported in accordance with the rule FCL |
state |
| 2025-10-01 | St Violation/Reminder Notice | state |
| 2025-10-01 | St Public Notif requested | state |
| 2024-10-16 | St Compliance achieved consumer notice received in accordance with the rule FCL 10/30/2024 |
state |
| 2024-10-15 | St Violation/Reminder Notice | state |
| 2024-10-15 | St Public Notif requested | state |
| 2023-08-14 | St Violation/Reminder Notice | state |
| 2023-08-14 | St Public Notif requested | state |
| 2023-07-14 | St Compliance achieved | state |
| 2022-03-15 | St Violation/Reminder Notice | state |
| 2022-03-15 | St Public Notif requested | state |
| 2022-03-15 | St Violation/Reminder Notice | state |
| 2022-03-15 | St Public Notif requested | state |
| 2021-07-06 | St Compliance achieved | state |
| 2021-02-11 | St Violation/Reminder Notice | state |
| 2021-02-11 | St Public Notif requested | state |
Lead and copper
The latest 90th-percentile lead result is 0.004 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 13 results on file.
The action level is not a health limit: it is the level at which the rule requires a system to act (corrosion control, public education, and in some cases replacing lead service lines). Lead mostly enters water from household plumbing, so a system-wide percentile does not tell you what comes out of one tap.
Violation, enforcement and lead/copper records are EPA SDWIS federal reporting, fetched monthly; the summary is EPA ECHO. Code names come from EPA's own REF_CODE_VALUE table. SDWIS carries violations, not routine sample results — nitrate, disinfection by-product and PFAS values are not in it, and a clean record here means nothing was reported as a violation, not that nothing was ever detected. For what was measured, ask the system for its Consumer Confidence Report.
PFAS and lithium: EPA's UCMR 5 monitoring, 2023–2025
Source Register of another agency · fetched 2026-10-09 · verify at EPA UCMR occurrence data ↗
8 samples, 240 results, 2023-05-24 to 2024-05-22. No PFAS was detected at the reporting limits; lithium was measured up to 25.7 µg/L (no federal limit).
| Contaminant | Results | Detected | Highest, µg/L | Reporting limit |
|---|---|---|---|---|
| HFPO-DA | 8 | 0 | < 0.005 | 0.005 |
| PFHxS | 8 | 0 | < 0.003 | 0.003 |
| PFNA | 8 | 0 | < 0.004 | 0.004 |
| PFOA | 8 | 0 | < 0.004 | 0.004 |
| PFOS | 8 | 0 | < 0.004 | 0.004 |
| lithium | 8 | 4 | 25.7 | 9.0 |
Rows shown: every detected contaminant plus the regulated PFAS and lithium; the rest were below their reporting limits. These are UCMR monitoring samples, not compliance samples. EPA's April 2024 rule set 4.0 ng/L (0.004 µg/L) for PFOA and PFOS, the same as UCMR 5's reporting limit, so any detection of either is at or above it; the rule's compliance date and its other limits have been under revision since 2025 and are not applied here. State PFAS sampling is on CDPHE's pages ↗.
Common questions
Who provides drinking water in Greeley, Colorado?
The City of Greeley is the public water system serving 132,310 people in Weld County, from surface water. Its EPA public water system id is CO0162321.
Where does the City of Greeley get its water?
The City of Greeley reports surface water as its primary source. EPA lists its source facilities as PURCHASED FROM NORTH WELD CO0162553, PURCHASED EAST LARIMER CNTYCO0135233, PURCHASED CITY OF LOVELAND CO0135485, BIG THOMPSON GLIC PUMPSTATION.
Does the City of Greeley have any drinking water violations?
EPA's compliance record shows no open health-based violations for the City of Greeley at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Places this system serves
Census places its EPA service-area boundary substantially covers. Each page lists every system serving that place.
Every provider in Weld County.
The record
EPA SDWIS federal reporting as of 2026-10-06; the compliance record above is EPA's own, fetched monthly, and the ECHO report carries the rest. Report a problem →