Hydrohistorian
City and County of Broomfield
Serves Broomfield.
Its service area also reaches Boulder Creek (38.0%).
Boundary traced from City of Broomfield. About 88 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| MATTHEW D GLASSER RESERVOIR | Intake | Surface water |
| PURCHASE WESTMINSTER INTERCONNECTION 1 | Consecutive connection (purchased) | Surface water · from WESTMINSTER CITY OF |
| WESTMINSTER INTERCONNECTION 2 | Consecutive connection (purchased) | Surface water · from WESTMINSTER CITY OF |
| CARTER LAKE | Intake | Surface water |
| PURCHASED FROM DENVER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
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 WESTMINSTER CITY OF, DENVER WATER BOARD.
Sells water to 4 systems: WESTMINSTER CITY OF, MILE HIGH WC, CIMARRON VILLAGE, FRONT RANGE.
DWR structures that name this system
Source Probable join · fetched 2026-09-09 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier
11 structures on DWR's record name this system as their contact (11). 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 |
|---|---|---|---|---|
| BROOMFIELD ALLUVIAL WELL GROUP 0210342 | WELL GROUP | GROUNDWATER: SOUTH PLATTE RIVER | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BROOMFIELD AUG 0202513 | AUGMENTATION/REPLACEMENT PLAN | UNDEFINED | South Platte: Denver Gage to Greeley | contact: BROOMFIELD (ALLEN, KEVIN) |
| BROOMFIELD AUG W-9412 0702512 | AUGMENTATION/REPLACEMENT PLAN | UNDEFINED | Clear Creek | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BROOMFIELD BIG DRY CR DIVERSION POINT 0200544 | PIPELINE | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BROOMFIELD DISCHRGE DIVERSION POINT 0200543 | PIPELINE | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BROOMFIELD LITTLE DRY CREEK DIVERSION 0200521 | DITCH | LITTLE DRY CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BROOMFIELD SEWER OUTFALL 0201021 | OTHER | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| BRUNNER RES 0203356 | RESERVOIR | BIG DRY CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| CHURCH DITCH(UPPER) 0600606 | DITCH | COAL CREEK | Boulder Creek | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
| GREAT WESTERN RESERVOIR 0203861 | RESERVOIR | WALNUT CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD (ALLEN, KEVIN) |
| PLASTER RESERVOIR 0203750 | RESERVOIR | CLEAR CREEK | South Platte: Denver Gage to Greeley | contact: BROOMFIELD, CITY AND COUNTY OF (CALVERT, MELANIE) |
Compliance record
Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗
Nothing open today, but 2 health-based violations appear on the federal record historically. The history is below.
EPA's own summary: violations in 1 of the last 12 quarters. In violation for, in EPA's words: 0200=Surface Water Treatment Rule.
What happened
All 2 violation records on file, grouped into the 1 distinct thing EPA's codes describe. Dates are the compliance period the violation is filed against.
Rule: Lead and Copper Rule -- corrosion of household plumbing.
Every violation record, as filed (2 of 2)
| Compliance period | What | About | Kind | Status | Measured |
|---|---|---|---|---|---|
| 2022-07-01 – 2022-12-31 | WQP Entry Point/Tap Treatment Technique Non-Compliance | Lead and Copper Rule | health-based | returned to compliance (2023-07-05) | |
| 2020-01-01 – 2020-06-30 | WQP Entry Point/Tap Treatment Technique Non-Compliance | Lead and Copper Rule | health-based | returned to compliance (2020-12-23) |
What the regulator did about it
11 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 |
|---|---|---|
| 2024-07-30 | St Compliance achieved revised MOR submitted indicating no issues at EPRD BJK |
state |
| 2024-07-26 | St Violation/Reminder Notice | state |
| 2024-07-26 | St Public Notif requested | state |
| 2023-07-05 | St Compliance achieved SOXd based on submittal of 6M202301 collection period data BJK |
state |
| 2023-01-23 | St Public Notif received | state |
| 2022-12-21 | St Violation/Reminder Notice | state |
| 2022-12-21 | St Public Notif requested | state |
| 2020-12-23 | St Compliance achieved | state |
| 2020-07-10 | St Public Notif received | state |
| 2020-06-09 | St Violation/Reminder Notice | state |
| 2020-06-09 | St Public Notif requested | state |
Lead and copper
The latest 90th-percentile lead result is 0.0025 mg/L (sampling period ending 2024-12-31) against an action level of 0.015 mg/L, below it. 14 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 2026-09-09 · verify at EPA UCMR occurrence data ↗
4 samples, 120 results, 2023-07-11 to 2024-04-01. No PFAS was detected at the reporting limits; lithium was not detected.
| Contaminant | Results | Detected | Highest, µg/L | Reporting limit |
|---|---|---|---|---|
| HFPO-DA | 4 | 0 | < 0.005 | 0.005 |
| PFHxS | 4 | 0 | < 0.003 | 0.003 |
| PFNA | 4 | 0 | < 0.004 | 0.004 |
| PFOA | 4 | 0 | < 0.004 | 0.004 |
| PFOS | 4 | 0 | < 0.004 | 0.004 |
| lithium | 4 | 0 | < 9.0 | 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 Broomfield, Colorado?
The City and County of Broomfield is the public water system serving 106,153 people, from surface water. Its EPA public water system id is CO0107155.
Where does the City and County of Broomfield get its water?
The City and County of Broomfield reports surface water as its primary source. EPA lists its source facilities as MATTHEW D GLASSER RESERVOIR, PURCHASE WESTMINSTER INTERCONNECTION 1, WESTMINSTER INTERCONNECTION 2, CARTER LAKE.
Does the City and County of Broomfield have any drinking water violations?
EPA's compliance record shows no open health-based violations for the City and County of Broomfield 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.
The record
EPA SDWIS federal reporting as of 2026-09-08; the compliance record above is EPA's own, fetched monthly, and the ECHO report carries the rest. Report a problem →