Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
3
health-based violations
1,014
violations on file
1
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 1999-08-01 → 1999-08-31 |
| MCL | Health-based | Resolved | 1999-06-01 → 1999-06-30 |
| MCL | Health-based | Resolved | 1998-10-01 → 1998-10-31 |
| MR | Monitoring | Unaddressed | 2026-01-01 |
| Other | Monitoring | Resolved | 2025-10-02 |
| Other | Monitoring | Resolved | 2025-10-02 |
| RPT | Monitoring | Resolved | 2025-09-01 |
| RPT | Monitoring | Resolved | 2025-09-01 |
| MR | Monitoring | Resolved | 2025-09-01 → 2025-09-30 |
| MR | Monitoring | Resolved | 2025-09-01 → 2025-09-30 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 5975 µg/L 60% of the EPA limit 10000 µg/L
worst single sample: 6840 µg/L | 146/146 | SYR4 | 2012–2019 |
| Copper | 278 µg/L 21% of the EPA limit 1300 µg/L
worst single sample: 340 µg/L | 93/94 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 5877.5 µg/L 59% of the EPA limit 10000 µg/L
worst single sample: 6470 µg/L | 66/66 | SYR4 | 2012–2019 |
| Arsenic | 10 µg/L 100% of the EPA limit 10 µg/L
worst single sample: 14 µg/L | 49/49 | SYR4 | 2012–2019 |
| Fluoride | 1250 µg/L 31% of the EPA limit 4000 µg/L | 20/20 | SYR4 | 2013–2019 |
| TTHM | 7.32 µg/L 9.2% of the EPA limit 80 µg/L
worst single sample: 11.4 µg/L | 18/19 | SYR4 | 2012–2019 |
| Lithium | 51.5 µg/L No EPA limit set | 18/18 | UCMR-5 | 2024 |
| Combined Uranium | 3.76 µg/L 13% of the EPA limit 30 µg/L
worst single sample: 4.4 µg/L | 17/18 | SYR4 | 2013–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0425 µg/L 21% of the EPA limit 0.2000 µg/L
worst single sample: 0.0500 µg/L | 16/68 | SYR4 | 2012–2019 |
| Chromium | 14.75 µg/L 15% of the EPA limit 100 µg/L
worst single sample: 17 µg/L | 16/20 | SYR4 | 2013–2019 |
| Barium | 41.2 µg/L 2.1% of the EPA limit 2000 µg/L
worst single sample: 44 µg/L | 15/20 | SYR4 | 2013–2019 |
| Selenium | 5.735 µg/L 11% of the EPA limit 50 µg/L
worst single sample: 5.8 µg/L | 14/20 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2025 |
| Gross Alpha, Excl. Radon And U | 1.555 pCi/L 10% of the EPA limit 15 pCi/L
worst single sample: 1.8 pCi/L | 8/15 | SYR4 | 2013–2019 |
| Lead | 4.5 µg/L 30% of the EPA limit 15 µg/L
worst single sample: 5 µg/L | 5/94 | SYR4 | 2013–2019 |
| Xylenes, Total | 25.91 µg/L 0.3% of the EPA limit 10000 µg/L
worst single sample: 30.2 µg/L | 4/64 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 0.7800 pCi/L 16% of the EPA limit 5 pCi/L
worst single sample: 0.8000 pCi/L | 3/37 | SYR4 | 2013–2019 |
| Bromodichloromethane | 0.8000 µg/L No EPA limit set | 2/3 | SYR4 | 2018–2019 |
| Bromoform | 1.37 µg/L No EPA limit set
worst single sample: 1.4 µg/L | 2/3 | SYR4 | 2018–2019 |
| Di(2-ethylhexyl) Phthalate | 1.93 µg/L 32% of the EPA limit 6 µg/L
worst single sample: 2 µg/L | 2/60 | SYR4 | 2012–2019 |
| Dibromochloromethane | 1.575 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 2/3 | SYR4 | 2018–2019 |
| Mercury | 0.3000 µg/L 15% of the EPA limit 2 µg/L | 2/20 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 1.295 µg/L 2.2% of the EPA limit 60 µg/L
worst single sample: 1.3 µg/L | 2/18 | SYR4 | 2012–2019 |
| Ethylbenzene | 5.2 µg/L 0.7% of the EPA limit 700 µg/L | 1/64 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/64 | SYR4 | 2012–2019 |
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about El Mirage City of
Is El Mirage City of tap water safe to drink?
EPA monitoring detected 29 contaminants in El Mirage City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in El Mirage City of's water?
EPA monitoring detected Nitrate, Copper, Nitrate-Nitrite, Arsenic, Fluoride, and others. The full list with the level and data source for each is above.
How many people does El Mirage City of serve?
El Mirage City of reports serving 39,884 people in Arizona, per its EPA record.
Has El Mirage City of had any water quality violations?
The EPA has 1014 violations on file for El Mirage City of, of which 3 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.