Tap Water Quality Report
Tap water quality in Aurora, Colorado
Tap water in Aurora, Colorado receives a grade of F (54/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily AURORA CITY OF. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Aurora's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Aurora.
PFAS contamination
Severe concernPerfluorooctanoic acid (PFOA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 21.6 ppb, 361x above the EWG health guideline of 0.06 ppb.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.186 ppt, 186x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 16.1 ppb, 161x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.179 ppb.
EPA compliance record
Official U.S. EPA records for AURORA CITY OF (system ID CO0103005) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving Aurora
Aurora is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
AURORA CITY OF
- PFAS contamination
- Haloacetic acids (HAA9) significantly above health guideline
- Perfluorohexane sulfonate (PFHXS) significantly above health guideline
EAST CHERRY CREEK VALLEY WSD
- PFAS contamination
- Perfluorohexane sulfonate (PFHXS) significantly above health guideline
- Haloacetic acids (HAA9) significantly above health guideline
Recommended filters for Aurora
Filters matched to the specific contaminants in Aurora's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
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 Aurora'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.462 ppt | 0.001 | 10.0 | — | — | — | — | 462× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
21.6 ppb | 0.06 | — | — | — | — | — | 361× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
28.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 189× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
16.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 161× over |
| Bromodichloromethane Disinfection byproduct |
8.17 ppb | 0.06 | — | — | — | — | — | 136× over |
| Dibromoacetic acid Disinfection byproduct |
2.83 ppb | 0.03 | — | — | — | — | — | 94× over |
| Dibromochloromethane Disinfection byproduct |
9.06 ppb | 0.1 | — | — | — | — | — | 91× over |
| Arsenic Heavy metal |
0.179 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 45× over |
| Trichloroacetic acid Disinfection byproduct |
4.45 ppb | 0.1 | — | — | — | — | — | 44× over |
| Radium, combined (-226 and -228) Radiological |
1.85 pCi/L | 0.05 | 5.0 | — | — | — | — | 37× over |
| Dichloroacetic acid Disinfection byproduct |
7.13 ppb | 0.2 | — | — | — | — | — | 36× over |
| Chloroform Disinfection byproduct |
7.95 ppb | 0.4 | — | — | — | — | — | 20× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.113 ppt | 0.006 | 10.0 | — | — | — | — | 19× over |
| Chromium (hexavalent) Heavy metal |
0.363 ppb | 0.02 | — | — | — | — | — | 18× over |
| Chlorite Disinfection byproduct |
477.5 ppb | 50.0 | 1000.0 | — | — | — | — | 9.6× over |
| Bromoform Disinfection byproduct |
4.74 ppb | 0.5 | — | — | — | — | — | 9.5× over |
| Uranium Radiological |
2.16 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 5.0× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.381 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 4.2× over |
| Nitrate and nitrite Inorganic |
0.5 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.6× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.752 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.5× over |
| Nitrate Inorganic |
0.3 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.1× over |
| Chlorate Disinfection byproduct |
265.2 ppb | 210.0 | — | — | — | — | — | 1.3× over |
| Manganese Heavy metal |
27.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0533 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Barium Heavy metal |
55.9 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
2.96 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
1.71 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
1.84 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Vanadium Other |
0.343 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.262 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.83 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.65 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.467 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.479 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.33 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.15 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.895 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.805 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
16.7 ppb | — | — | — | — | — | — | Below guideline |
| Nitrite Inorganic |
0.00435 ppm | — | 1.0 | — | — | — | — | 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 AURORA CITY OF.