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Community Water System · PWS AZ0407099

Epcor - Sun City

El Mirage, Arizona 85335 - drinking water served from groundwater sources to 38,016 people, tracked in EPA SDWIS and UCMR5.

38,016
People served
308
EPA violations
1
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 308 drinking-water violations at Epcor - Sun City - above the Arizona per-system average.

308
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
38,016
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Epcor - Sun City

Epcor - Sun City is a private-owned community water system that delivers drinking water to 38,016 residents in El Mirage, Arizona (Maricopa County) through 23,082 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 308 total violations for this system , of which 1 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 298 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is DICHLOROMETHANE, recorded in 133 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Epcor - Sun City's 308 violations sit above the Arizona average.

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

Population Served
38,016
Total Violations
308
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
23,082
County
Maricopa
School/Daycare
No
MCL Violations
1
Monitoring Violations
298
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
DICHLOROMETHANE MR 133 2009
Nitrate MR 58 2010
Asbestos MR 10 2003
Arsenic MR 9 1980
Mercury MR 9 1980
Coliform (TCR) MR 8 2012
TTHM MR 6 2013
Total Haloacetic Acids (HAA5) MR 6 2013
Consumer Confidence Rule Other 6 2012
Heptachlor MR 4 2003
Heptachlor epoxide MR 4 2003
Pentachlorophenol MR 3 2006
Di(2-ethylhexyl) phthalate MR 2 2012
Benzo(a)pyrene MR 2 2003
Chlorine MR 2 2018
BHC-GAMMA MR 1 2003
Methoxychlor MR 1 2003
Toxaphene MR 1 2003
Diquat MR 1 2003
Endothall MR 1 2003
Di(2-ethylhexyl) adipate MR 1 2003
Simazine MR 1 2003
Picloram MR 1 2003
Hexachlorocyclopentadiene MR 1 2003
Atrazine MR 1 2003
LASSO MR 1 2003
2,4-D MR 1 2003
HEXACHLOROBENZENE MR 1 2003
1,2,4-Trichlorobenzene MR 1 2009
Xylenes, Total MR 1 2009

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 406 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 4/18/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 4/18/2023 <20.00 ppt 20.00 ppt Not Detected
HFPO-DA 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFEESA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 4/18/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 4/18/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 4/18/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 4/18/2023 <7.00 ppt 7.00 ppt Not Detected
PFDA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 4/18/2023 <20.00 ppt 20.00 ppt Not Detected
ADONA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 4/18/2023 <6.00 ppt 6.00 ppt Not Detected
9Cl-PF3ONS 4/18/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 4/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 4/18/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/18/2023 <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 Epcor - Sun City.

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 AZ0407099 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Epcor - Sun City under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ, Drinking Water Program

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
2018 Chlorine MR 2 SDWIS / AZ0407099 / 0999
2013 TTHM MR 6 SDWIS / AZ0407099 / 2950
2013 Total Haloacetic Acids (HAA5) MR 6 SDWIS / AZ0407099 / 2456
2012 Coliform (TCR) MR 8 SDWIS / AZ0407099 / 3100
2012 Consumer Confidence Rule Other 6 SDWIS / AZ0407099 / 7000
2012 Di(2-ethylhexyl) phthalate MR 2 SDWIS / AZ0407099 / 2039
2010 Nitrate MR 58 SDWIS / AZ0407099 / 1040
2009 DICHLOROMETHANE MR 133 SDWIS / AZ0407099 / 2964
2009 1,2,4-Trichlorobenzene MR 1 SDWIS / AZ0407099 / 2378
2009 Xylenes, Total MR 1 SDWIS / AZ0407099 / 2955
2009 o-Dichlorobenzene MR 1 SDWIS / AZ0407099 / 2968
2009 p-Dichlorobenzene MR 1 SDWIS / AZ0407099 / 2969
2009 Vinyl chloride MR 1 SDWIS / AZ0407099 / 2976
2009 1,1-Dichloroethylene MR 1 SDWIS / AZ0407099 / 2977
2009 trans-1,2-Dichloroethylene MR 1 SDWIS / AZ0407099 / 2979

How Epcor - Sun City Compares

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

Metric Epcor - Sun City Arizona avg Federal benchmark
Total violations 308 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 38,016 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

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 Epcor - Sun City water safe to drink? ▼
Epcor - Sun City (PWS ID: AZ0407099) has 308 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 38,016 people using Groundwater sources.
How many people does Epcor - Sun City serve? ▼
Epcor - Sun City serves 38,016 people in El Mirage, Arizona. It is a Private-owned system using Groundwater water sources with 23,082 service connections.
What type of violations does Epcor - Sun City have? ▼
Epcor - Sun City has 308 total violations: 1 health-based violations (MCL exceedances or treatment failures), 298 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Epcor - Sun City water? ▼
No. Epcor - Sun City was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Epcor - Sun City use? ▼
Epcor - Sun City uses Groundwater 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.