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.
15
health-based violations
2,453
violations on file
1
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2016-10-01 → 2016-12-31 |
| MCL | Health-based | Resolved | 2016-10-01 → 2016-12-31 |
| MCL | Health-based | Resolved | 2016-10-01 → 2016-12-31 |
| MCL | Health-based | Resolved | 2016-10-01 → 2016-12-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-09-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-06-30 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
| MCL | Health-based | Resolved | 2004-01-01 → 2004-12-31 |
| MCL | Health-based | Archived | 1989-04-01 → 1989-06-30 |
| MCL | Health-based | Archived | 1982-04-07 → 1982-05-06 |
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 | 8483 µg/L 85% of the EPA limit 10000 µg/L
worst single sample: 10800 µg/L | 598/604 | SYR4 | 2012–2019 |
| TTHM | 80.51 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 108 µg/L | 275/275 | SYR4 | 2012–2019 |
| Arsenic | 7.7 µg/L 77% of the EPA limit 10 µg/L
worst single sample: 9.8 µg/L | 274/274 | SYR4 | 2012–2019 |
| Fluoride | 610 µg/L 15% of the EPA limit 4000 µg/L
worst single sample: 780 µg/L | 273/274 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 27 µg/L 45% of the EPA limit 60 µg/L
worst single sample: 39 µg/L | 251/269 | SYR4 | 2012–2019 |
| Copper | 408.8 µg/L 31% of the EPA limit 1300 µg/L
worst single sample: 1770 µg/L | 173/173 | SYR4 | 2013–2019 |
| Barium | 80 µg/L 4% of the EPA limit 2000 µg/L
worst single sample: 120 µg/L | 102/104 | SYR4 | 2012–2019 |
| Selenium | 5.43 µg/L 11% of the EPA limit 50 µg/L
worst single sample: 6.6 µg/L | 78/104 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 8732.5 µg/L 87% of the EPA limit 10000 µg/L
worst single sample: 10800 µg/L | 70/72 | SYR4 | 2012–2019 |
| Bromate | 6.78 µg/L 68% of the EPA limit 10 µg/L
worst single sample: 16.4 µg/L | 63/127 | SYR4 | 2012–2019 |
| Chromium | 37 µg/L 37% of the EPA limit 100 µg/L
worst single sample: 39 µg/L | 44/104 | SYR4 | 2012–2019 |
| Lithium | 162 µg/L No EPA limit set | 33/33 | UCMR-5 | 2025 |
| Xylenes, Total | 9.075 µg/L 0.1% of the EPA limit 10000 µg/L
worst single sample: 23.1 µg/L | 18/142 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 16/16 | LCR | 2025 |
| Lead | 15.29 µg/L 102% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 25.3 µg/L | 15/173 | SYR4 | 2013–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L | 13/142 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 1.28 pCi/L 26% of the EPA limit 5 pCi/L
worst single sample: 1.3 pCi/L | 5/55 | SYR4 | 2013–2019 |
| Ethylbenzene | 2.96 µg/L 0.4% of the EPA limit 700 µg/L
worst single sample: 3.2 µg/L | 3/140 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 2.51 pCi/L 17% of the EPA limit 15 pCi/L
worst single sample: 2.7 pCi/L | 3/3 | SYR4 | 2014–2016 |
| Toluene | 0.9900 µg/L 0.1% of the EPA limit 1000 µg/L
worst single sample: 1 µg/L | 3/140 | SYR4 | 2012–2019 |
| Combined Uranium | 3.22 µg/L 11% of the EPA limit 30 µg/L
worst single sample: 3.3 µg/L | 2/2 | SYR4 | 2014–2015 |
| Dinoseb | 0.2950 µg/L 4.2% of the EPA limit 7 µg/L
worst single sample: 0.3000 µg/L | 2/144 | SYR4 | 2012–2019 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L | 1/144 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 1.2 µg/L 24% of the EPA limit 5 µg/L | 1/140 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Adipate | 1.3 µg/L 0.3% of the EPA limit 400 µg/L | 1/134 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 0.7000 µg/L 12% of the EPA limit 6 µg/L | 1/135 | SYR4 | 2012–2019 |
| Nitrite | 40 µg/L 4% of the EPA limit 1000 µg/L | 1/132 | SYR4 | 2012–2019 |
76 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-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranChlordaneDichloromethaneDalaponDiquatEthylene DibromideEndothallEndrinGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Peoria City of
Is Peoria City of tap water safe to drink?
EPA monitoring detected 30 contaminants in Peoria 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 Peoria City of's water?
EPA monitoring detected Nitrate, TTHM, Arsenic, Fluoride, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Peoria City of serve?
Peoria City of reports serving 187,676 people in Arizona, per its EPA record.
Has Peoria City of had any water quality violations?
The EPA has 2453 violations on file for Peoria City of, of which 15 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.