Tap Water Quality Report
Tap water quality in ARVADA, Colorado
Tap water in ARVADA, Colorado receives a grade of C (72/100) from TapWaterSafety.org. It's served by ARVADA CITY OF. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in ARVADA's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving ARVADA.
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.
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.
Recommended filters for ARVADA
Filters matched to the specific contaminants in ARVADA's 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.
All contaminants detected in ARVADA's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from ARVADA CITY OF.