Water Quality Report · Updated October 07, 2026
BROOMFIELD CITY AND COUNTY OF
BROOMFIELD CITY AND COUNTY OF delivers tap water graded C (73/100) by TapWaterSafety.org. The utility serves approximately 106,153 residents in BROOMFIELD, Colorado using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 303-464-5606.
Is BROOMFIELD tap water safe to drink?
BROOMFIELD CITY AND COUNTY OF delivers tap water that earns a grade of C (73/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 106,153 residents in BROOMFIELD, drawing from surface water.
Public testing data identifies 12 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Arsenic, Trichloroacetic acid, Dichloroacetic acid, Chloroform, Radium, combined (-226 and -228), Dibromochloromethane, Chromium (hexavalent), Cadmium. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for BROOMFIELD CITY AND COUNTY OF (system ID CO0107155) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Surface Water Treatment Rule | Missed testing or reporting | 06/01/2024 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for BROOMFIELD residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for BROOMFIELD CITY AND COUNTY OF.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 23.7 ppb, 396x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 25.9 ppb, 173x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 17.1 ppb, 171x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.282 ppb.
Contact BROOMFIELD CITY AND COUNTY OF
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for BROOMFIELD
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 73/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
23.7 ppb | 0.06 | — | — | — | — | — | 396× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
25.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 173× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
17.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 171× over |
| Bromodichloromethane Disinfection byproduct |
5.09 ppb | 0.06 | — | — | — | — | — | 85× over |
| Arsenic Heavy metal |
0.282 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 70× over |
| Trichloroacetic acid Disinfection byproduct |
6.79 ppb | 0.1 | — | — | — | — | — | 68× over |
| Dichloroacetic acid Disinfection byproduct |
10.3 ppb | 0.2 | — | — | — | — | — | 52× over |
| Chloroform Disinfection byproduct |
19.8 ppb | 0.4 | — | — | — | — | — | 50× over |
| Radium, combined (-226 and -228) Radiological |
1.3 pCi/L | 0.05 | 5.0 | — | — | — | — | 26× over |
| Dibromochloromethane Disinfection byproduct |
0.959 ppb | 0.1 | — | — | — | — | — | 9.6× over |
| Chromium (hexavalent) Heavy metal |
0.0424 ppb | 0.02 | — | — | — | — | — | 2.1× over |
| Cadmium Heavy metal |
0.055 ppb | 0.04 | 5.0 | 5 | 3 | 0.04 | — | 1.4× over |
| Dibromoacetic acid Disinfection byproduct |
0.024 ppb | 0.03 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
147.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Antimony Heavy metal |
0.605 ppb | 1.0 | 6.0 | 10 | 20 | 1 | — | Below guideline |
| Nitrate Inorganic |
0.0467 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Vanadium Other |
0.748 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.38 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
3.35 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
14.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Strontium Radiological |
0.116 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.335 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.636 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
BROOMFIELD CITY AND COUNTY OF service area
This water system serves 1 community in Broomfield County, Colorado. Click any city for its dedicated tap water quality page.
Find the right filter for BROOMFIELD water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.