Water Quality Report · Updated May 12, 2026
EAST CHERRY CREEK VALLEY WSD
EAST CHERRY CREEK VALLEY WSD delivers tap water graded F (47/100) by TapWaterSafety.org. The utility serves approximately 66,130 residents in AURORA, Colorado using surface water (purchased). The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 303-693-3800.
Is AURORA tap water safe to drink?
EAST CHERRY CREEK VALLEY WSD delivers tap water that earns a grade of F (47/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 66,130 residents in AURORA, drawing from surface water (purchased).
Public testing data identifies 20 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Bromodichloromethane, Dibromoacetic acid, Dibromochloromethane, Haloacetic acids (HAA5), Radium, combined (-226 and -228), Perfluorononanoic acid (PFNA), Dichloroacetic acid, Chloroform, Trichloroacetic acid, Arsenic, Bromoform, Uranium, Perfluorooctanoic acid (PFOA), Nitrate and nitrite, Perfluorooctane sulfonate (PFOS), Nitrate, 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.
Quick actions for AURORA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for EAST CHERRY CREEK VALLEY WSD.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.462 ppt, 462x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 17.7 ppb, 295x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 28.4 ppb, 189x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.0526 ppb.
Contact EAST CHERRY CREEK VALLEY WSD
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 AURORA
Filters matched to the specific contaminants in this water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 47/100 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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.462 ppt | 0.001 | 10.0 | — | — | — | — | 462× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
17.7 ppb | 0.06 | — | — | — | — | — | 295× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
28.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 189× 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 |
| Haloacetic acids (HAA5) Disinfection byproduct |
8.53 ppb | 0.1 | 60.0 | 60 | — | — | — | 85× over |
| Radium, combined (-226 and -228) Radiological |
1.85 pCi/L | 0.05 | 5.0 | — | — | — | — | 37× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.113 ppt | 0.006 | 10.0 | — | — | — | — | 19× over |
| Dichloroacetic acid Disinfection byproduct |
3.46 ppb | 0.2 | — | — | — | — | — | 17× over |
| Chloroform Disinfection byproduct |
6.42 ppb | 0.4 | — | — | — | — | — | 16× over |
| Trichloroacetic acid Disinfection byproduct |
1.56 ppb | 0.1 | — | — | — | — | — | 16× over |
| Arsenic Heavy metal |
0.0526 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 13× 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 |
0.208 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.5× over |
| Chlorate Disinfection byproduct |
265.2 ppb | 210.0 | — | — | — | — | — | 1.3× over |
| Chromium (hexavalent) Heavy metal |
0.0157 ppb | 0.02 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
27.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
55.9 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
1.84 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Molybdenum Other |
1.69 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.679 ppb | 25.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00327 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Vanadium Other |
0.0681 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.83 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.62 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.248 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.3 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.118 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 |
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.
EAST CHERRY CREEK VALLEY WSD service area
This water system serves 1 community in Arapahoe County, Colorado. Click any city for its dedicated tap water quality page.
Find the right filter for AURORA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.