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Community Water System · PWS AZ0407091

El Mirage City Of

El Mirage, Arizona 85335 - drinking water served from groundwater sources to 39,884 people, tracked in EPA SDWIS and UCMR5.

39,884
People served
1,007
EPA violations
3
Health-based
4 PFAS
UCMR5 result

The verdict

EPA records 1,007 drinking-water violations at El Mirage City Of - above the Arizona per-system average, and UCMR5 testing detected 4 PFAS compounds.

1,007
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
39,884
People served by this system
4
PFAS compounds detected (UCMR5)

Water Quality Snapshot: El Mirage City Of

El Mirage City Of is a local-owned community water system that delivers drinking water to 39,884 residents in El Mirage, Arizona (Maricopa County) through 11,517 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,007 total violations for this system , of which 3 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 992 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Nitrate, recorded in 36 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 4 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 10 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

El Mirage City Of's 1,007 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.

PFAS Detected

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

Population Served
39,884
Total Violations
1,007
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
11,517
County
Maricopa
School/Daycare
No
MCL Violations
3
Monitoring Violations
992
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 36 2021
Arsenic MR 35 2022
Ethylbenzene MR 20 2019
Xylenes, Total MR 20 2019
1,2-DIBROMO-3-CHLOROPROPANE MR 19 2022
Styrene MR 18 2019
cis-1,2-Dichloroethylene MR 18 2019
DICHLOROMETHANE MR 18 2019
o-Dichlorobenzene MR 18 2019
p-Dichlorobenzene MR 18 2019
1,2-Dichloroethane MR 18 2019
Trichloroethylene MR 18 2019
Carbon tetrachloride MR 18 2019
Tetrachloroethylene MR 18 2019
CHLOROBENZENE MR 18 2019
1,1-Dichloroethylene MR 18 2019
1,2-Dichloropropane MR 18 2019
1,1,2-Trichloroethane MR 18 2019
Benzene MR 18 2019
1,1,1-Trichloroethane MR 18 2019
Toluene MR 18 2019
trans-1,2-Dichloroethylene MR 18 2019
1,2,4-Trichlorobenzene MR 17 2019
Gross Alpha, Excl. Radon and U MR 15 2021
Di(2-ethylhexyl) phthalate MR 14 2019
Diquat MR 14 2019
Methoxychlor MR 13 2019
Dalapon MR 13 2019
Endothall MR 13 2019
OXAMYL MR 13 2019

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 522 samples detected PFAS.

Contaminant Date Result MRL Status
PFHxA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFMBA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFDA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 9/14/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/14/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/14/2023 <20.00 ppt 20.00 ppt Not Detected
PFHxS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 9/14/2023 <6.00 ppt 6.00 ppt Not Detected
8:2 FTS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/14/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFMPA 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/14/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 9/14/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 9/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 9/14/2023 <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 El Mirage City Of.

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 AZ0407091 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 El Mirage City Of 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
2025 Chlorine MR 10 SDWIS / AZ0407091 / 0999
2025 Revised Total Coliform Rule RPT 1 SDWIS / AZ0407091 / 8000
2022 Arsenic MR 35 SDWIS / AZ0407091 / 1005
2022 1,2-DIBROMO-3-CHLOROPROPANE MR 19 SDWIS / AZ0407091 / 2931
2021 Nitrate MR 36 SDWIS / AZ0407091 / 1040
2021 Gross Alpha, Excl. Radon and U MR 15 SDWIS / AZ0407091 / 4000
2021 Combined Uranium MR 13 SDWIS / AZ0407091 / 4006
2021 Combined Radium (-226 and -228) MR 8 SDWIS / AZ0407091 / 4010
2021 Radium-226 MR 8 SDWIS / AZ0407091 / 4020
2021 Radium-228 MR 8 SDWIS / AZ0407091 / 4030
2019 Ethylbenzene MR 20 SDWIS / AZ0407091 / 2992
2019 Xylenes, Total MR 20 SDWIS / AZ0407091 / 2955
2019 Styrene MR 18 SDWIS / AZ0407091 / 2996
2019 cis-1,2-Dichloroethylene MR 18 SDWIS / AZ0407091 / 2380
2019 DICHLOROMETHANE MR 18 SDWIS / AZ0407091 / 2964

How El Mirage City Of Compares

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

Metric El Mirage City Of Arizona avg Federal benchmark
Total violations 1,007 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection 4 compounds 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 39,884 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 El Mirage City Of water safe to drink? ▼
El Mirage City Of (PWS ID: AZ0407091) has 1007 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 4 PFAS compounds found. This system serves 39,884 people using Groundwater sources.
How many people does El Mirage City Of serve? ▼
El Mirage City Of serves 39,884 people in El Mirage, Arizona. It is a Local-owned system using Groundwater water sources with 11,517 service connections.
What type of violations does El Mirage City Of have? ▼
El Mirage City Of has 1,007 total violations: 3 health-based violations (MCL exceedances or treatment failures), 992 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in El Mirage City Of water? ▼
Yes. UCMR5 testing detected 4 PFAS compounds in El Mirage City Of's water supply: PFPeA, PFBS, PFOA, PFHxA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does El Mirage City Of use? ▼
El Mirage City Of 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.