Water Quality Report · Updated October 07, 2026
ARVADA CITY OF
ARVADA CITY OF delivers tap water graded C (72/100) by TapWaterSafety.org. The utility serves approximately 171,610 residents in ARVADA, Colorado using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 720-898-7802.
Is ARVADA tap water safe to drink?
ARVADA CITY OF delivers tap water that earns a grade of C (72/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 171,610 residents in ARVADA, drawing from surface water.
Public testing data identifies 13 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Trichloroacetic acid, Bromodichloromethane, Chloroform, Dichloroacetic acid, Radium, combined (-226 and -228), Arsenic, Dibromochloromethane, Chromium (hexavalent), Dibromoacetic acid, Chlorate. 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 ARVADA CITY OF (system ID CO0130001) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule | Missed testing or reporting | 05/01/2024 | Resolved |
| Surface Water Treatment Rule | Missed testing or reporting | 02/01/2024 | 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 ARVADA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for ARVADA CITY OF.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 30.3 ppb, 504x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 23.6 ppb, 236x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 34.0 ppb, 227x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.0737 ppb.
Contact ARVADA CITY 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 ARVADA
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 72/100 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 |
30.3 ppb | 0.06 | — | — | — | — | — | 504× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
23.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 236× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 227× over |
| Trichloroacetic acid Disinfection byproduct |
12.7 ppb | 0.1 | — | — | — | — | — | 127× over |
| Bromodichloromethane Disinfection byproduct |
6.56 ppb | 0.06 | — | — | — | — | — | 109× over |
| Chloroform Disinfection byproduct |
26.1 ppb | 0.4 | — | — | — | — | — | 65× over |
| Dichloroacetic acid Disinfection byproduct |
10.6 ppb | 0.2 | — | — | — | — | — | 53× over |
| Radium, combined (-226 and -228) Radiological |
0.93 pCi/L | 0.05 | 5.0 | — | — | — | — | 19× over |
| Arsenic Heavy metal |
0.0737 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 18× over |
| Dibromochloromethane Disinfection byproduct |
1.26 ppb | 0.1 | — | — | — | — | — | 13× over |
| Chromium (hexavalent) Heavy metal |
0.0797 ppb | 0.02 | — | — | — | — | — | 4.0× over |
| Dibromoacetic acid Disinfection byproduct |
0.0689 ppb | 0.03 | — | — | — | — | — | 2.3× over |
| Chlorate Disinfection byproduct |
423.3 ppb | 210.0 | — | — | — | — | — | 2.0× over |
| Manganese Heavy metal |
6.99 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Nitrate Inorganic |
0.00789 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Molybdenum Other |
1.9 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
25.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0151 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Uranium Radiological |
0.01 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Vanadium Other |
0.155 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.235 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Toluene Volatile organic compound |
0.0425 ppb | 150.0 | 1000.0 | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
0.156 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
0.102 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.538 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
1.2 ppb | — | — | — | — | — | — | 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.
ARVADA CITY OF service area
This water system serves 1 community in Jefferson County, Colorado. Click any city for its dedicated tap water quality page.
Find the right filter for ARVADA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.