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Community Water System · PWS CO0103035

East Cherry Creek Valley WSD

Aurora, Colorado 80016 - drinking water served from surface water sources to 66,130 people, tracked in EPA SDWIS and UCMR5.

66,130
People served
1,783
EPA violations
0
Health-based
2 PFAS
UCMR5 result

The verdict

EPA records 1,783 drinking-water violations at East Cherry Creek Valley WSD - above the Colorado per-system average, and UCMR5 testing detected 2 PFAS compounds.

1,783
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
66,130
People served by this system
2
PFAS compounds detected (UCMR5)

Water Quality Snapshot: East Cherry Creek Valley WSD

East Cherry Creek Valley WSD is a local-owned community water system that delivers drinking water to 66,130 residents in Aurora, Colorado (Arapahoe County) through 19,300 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 1,783 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,782 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Di(2-ethylhexyl) phthalate, recorded in 40 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 6.2 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 98 of 163 UCMR5-tested systems have reported PFAS detections (60.1%).

East Cherry Creek Valley WSD's 1,783 violations sit above the Colorado average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
66,130
Total Violations
1,783
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
19,300
County
Arapahoe
School/Daycare
No
MCL Violations
0
Monitoring Violations
1,782
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Di(2-ethylhexyl) phthalate MR 40 2017
Arsenic MR 34 2007
Cadmium MR 34 2007
Chromium MR 34 2007
Barium MR 34 2007
Antimony, Total MR 34 2007
Beryllium, Total MR 34 2007
Selenium MR 34 2007
Nickel MR 34 2007
Thallium, Total MR 34 2007
Mercury MR 34 2007
Toxaphene MR 34 2017
Diquat MR 34 2017
Endothall MR 34 2017
Simazine MR 34 2017
Picloram MR 34 2017
Dinoseb MR 34 2017
Hexachlorocyclopentadiene MR 34 2017
Carbofuran MR 34 2017
LASSO MR 34 2017
Heptachlor epoxide MR 34 2017
2,4-D MR 34 2017
Pentachlorophenol MR 34 2017
1,2-DIBROMO-3-CHLOROPROPANE MR 34 2017
Chlordane MR 34 2017
Endrin MR 34 2017
Methoxychlor MR 34 2017
Dalapon MR 34 2017
HEXACHLOROBENZENE MR 34 2017
Di(2-ethylhexyl) adipate MR 34 2017

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 8/22/2023 <6.00 ppt 6.00 ppt Not Detected
PFTA 8/22/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/22/2023 <7.00 ppt 7.00 ppt Not Detected
PFHpS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 8/22/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFMPA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
4:2 FTS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFEESA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/22/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 8/22/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 8/22/2023 <6.00 ppt 6.00 ppt Not Detected
PFMPA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for East Cherry Creek Valley WSD.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CO0103035 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Colorado Drinking Water Authority

Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects East Cherry Creek Valley WSD under EPA-delegated authority.

Open CO regulator portal

Source: Colorado Department of Public Health and Environment, Water Quality Control

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Combined Radium (-226 and -228) MR 6 SDWIS / CO0103035 / 4010
2024 Gross Alpha, Excl. Radon and U MR 6 SDWIS / CO0103035 / 4000
2019 Revised Total Coliform Rule MON 3 SDWIS / CO0103035 / 8000
2019 Chlorine MR 3 SDWIS / CO0103035 / 0999
2019 Surface Water Treatment Rule MR 3 SDWIS / CO0103035 / 0200
2017 Di(2-ethylhexyl) phthalate MR 40 SDWIS / CO0103035 / 2039
2017 Toxaphene MR 34 SDWIS / CO0103035 / 2020
2017 Diquat MR 34 SDWIS / CO0103035 / 2032
2017 Endothall MR 34 SDWIS / CO0103035 / 2033
2017 Simazine MR 34 SDWIS / CO0103035 / 2037
2017 Picloram MR 34 SDWIS / CO0103035 / 2040
2017 Dinoseb MR 34 SDWIS / CO0103035 / 2041
2017 Hexachlorocyclopentadiene MR 34 SDWIS / CO0103035 / 2042
2017 Carbofuran MR 34 SDWIS / CO0103035 / 2046
2017 LASSO MR 34 SDWIS / CO0103035 / 2051

How East Cherry Creek Valley WSD Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric East Cherry Creek Valley WSD Colorado avg Federal benchmark
Total violations 1,783 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 13.9 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 60.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 66,130 3,408 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is East Cherry Creek Valley WSD water safe to drink? ▼
East Cherry Creek Valley WSD (PWS ID: CO0103035) has 1783 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 66,130 people using Surface Water sources.
How many people does East Cherry Creek Valley WSD serve? ▼
East Cherry Creek Valley WSD serves 66,130 people in Aurora, Colorado. It is a Local-owned system using Surface Water water sources with 19,300 service connections.
What type of violations does East Cherry Creek Valley WSD have? ▼
East Cherry Creek Valley WSD has 1,783 total violations: 0 health-based violations (MCL exceedances or treatment failures), 1,782 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in East Cherry Creek Valley WSD water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in East Cherry Creek Valley WSD's water supply: PFPeA, PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does East Cherry Creek Valley WSD use? ▼
East Cherry Creek Valley WSD uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.