Hydrohistorian
City of Westminster
Serves Shaw Heights, Westminster, Federal Heights.
Its service area also reaches Clear Creek (11.0%).
Boundary traced. About 73 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| PURCHASED WATER FROM THORNTON | Consecutive connection (purchased) | Surface water · from THORNTON CITY OF |
| STANDLEY LAKE | Intake | Surface water |
| FHL BYPASS | Intake | Surface water |
| PURCHASED FROM CO0101040 | Consecutive connection (purchased) | Surface water · from CRESTVIEW WSD |
| PURCHASED FROM CO0107155 | Consecutive connection (purchased) | Surface water · from BROOMFIELD CITY AND COUNTY OF |
| PURCHASED FROM CO0116001 | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| PURCHASED FROM CO0101115 | Consecutive connection (purchased) | Surface water · from NORTHGLENN CITY OF |
| PURCHASED FROM CO0130001 | Consecutive connection (purchased) | Surface water · from ARVADA CITY OF |
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 THORNTON CITY OF, CRESTVIEW WSD, BROOMFIELD CITY AND COUNTY OF, DENVER WATER BOARD, NORTHGLENN CITY OF, ARVADA CITY OF.
Sells water to 4 systems: CRESTVIEW WSD, FEDERAL HEIGHTS CITY OF, CASA ESTATES MHP, BROOMFIELD CITY AND COUNTY OF.
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
14 structures on DWR's record name this system as their contact (14). 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 |
|---|---|---|---|---|
| CROKE CANAL 0700553 | DITCH | CLEAR CREEK | Clear Creek | contact: CITY OF WESTMINSTER (BOB KRUGMIRE) |
| FARMERS HIGHLINE RALSTON CREEK 0700872 | DITCH | RALSTON CREEK | Clear Creek | contact: CITY OF WESTMINSTER (BOB KRUGMIRE) |
| HAPPE PONDS 0703336 | RESERVOIR | CLEAR CREEK | Clear Creek | contact: CITY OF WESTMINSTER (BOB KRUGMIRE) |
| KERSHAW DITCH BYPASS 0702328 | OTHER | CLEAR CREEK | Clear Creek | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| LAST CHANCE DITCH 0600615 | DITCH | COAL CREEK | Boulder Creek | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| NORTH RESERVOIR COMPLEX IMPACT REACH 0202370 | REACH | SOUTH PLATTE RIVER | South Platte: Denver Gage to Greeley | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| SHEETS PONDS 0703335 | RESERVOIR | CLEAR CREEK | Clear Creek | contact: CITY OF WESTMINSTER (BOB KRUGMIRE) |
| SIGNAL 2 RESERVOIR 0203940 | RESERVOIR | CLEAR CREEK | South Platte: Denver Gage to Greeley | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| WESTMINSTER AUG 0202514 | AUGMENTATION/REPLACEMENT PLAN | UNDEFINED | South Platte: Denver Gage to Greeley | contact: CITY OF WESTMINSTER (BOB KRUGMIRE) |
| WESTMINSTER AUG IMPACT REACH 0202285 | REACH | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| WESTMINSTER AUG W-8743 0702502 | AUGMENTATION/REPLACEMENT PLAN | UNDEFINED | Clear Creek | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| WESTMINSTER AUG W-8743 IMPACT REACH 0702912 | REACH | CLEAR CREEK | Clear Creek | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| WESTMINSTER CITY PARK P 0203834 | RESERVOIR | SOUTH PLATTE RIVER | South Platte: Denver Gage to Greeley | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
| WESTMINSTER SEWER 0202300 | OTHER | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: WESTMINSTER, CITY OF (DIRECTOR OF PUBLIC WORKS) |
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 2 of the last 12 quarters. In violation for, in EPA's words: 0200=Surface Water Treatment Rule.
No health-based or open violation on the federal record for this system.
What the regulator did about it
9 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 |
|---|---|---|
| 2025-06-20 | St Public Notif received PN performed with 2025 CCR. MM 7/1/2025 |
state |
| 2025-03-05 | St Compliance achieved SOXing; monitored and reported correctly for February 2025 (per MOR submitted 3/5/2025) without additional M&R violations in accordance with the rule. MM 4/25/2025 |
state |
| 2025-02-12 | St Violation/Reminder Notice | state |
| 2025-02-12 | St Public Notif requested | state |
| 2025-01-22 | St Violation/Reminder Notice | state |
| 2025-01-22 | St Public Notif requested | state |
| 2022-03-02 | St Compliance achieved | state |
| 2022-02-16 | St Violation/Reminder Notice | state |
| 2022-02-16 | St Public Notif requested | state |
Lead and copper
The latest 90th-percentile lead result is 0.0013 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 7 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, 2024-03-12 to 2024-12-04. No PFAS was detected at the reporting limits; lithium was measured up to 21.3 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 | 8 | 21.3 | 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 Westminster, Colorado?
The City of Westminster is the public water system serving 202,078 people in Adams County, from surface water. Its EPA public water system id is CO0101170.
Where does the City of Westminster get its water?
The City of Westminster reports surface water as its primary source. EPA lists its source facilities as PURCHASED WATER FROM THORNTON, STANDLEY LAKE, FHL BYPASS, PURCHASED FROM CO0101040.
Does the City of Westminster have any drinking water violations?
EPA's compliance record shows no open health-based violations for the City of Westminster 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 Adams 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 →