Is Epcor - Agua Fria Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Private
Counties served: Maricopa

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.

health-based violations

510

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2025-08-24
TT	Health-based	Resolved	2022-01-01 → 2022-06-30
TT	Health-based	Resolved	2022-01-01 → 2022-06-30
MCL	Health-based	Resolved	2004-03-01 → 2004-03-31
MCL	Health-based	Resolved	2001-08-01 → 2001-08-31
MR	Monitoring	Resolved	2025-07-01 → 2025-07-31
MR	Monitoring	Resolved	2025-07-01 → 2025-07-31
MR	Monitoring	Resolved	2024-04-01 → 2024-06-30
MR	Monitoring	Resolved	2024-04-01 → 2024-06-30
MR	Monitoring	Resolved	2024-04-01 → 2024-06-30

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
TTHM	86.41 µg/L 108% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 118 µg/L	420/460	SYR4	2012–2019
Nitrate	4970 µg/L 50% of the EPA limit 10000 µg/L worst single sample: 6180 µg/L	326/466	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	28 µg/L 47% of the EPA limit 60 µg/L worst single sample: 39.9 µg/L	312/452	SYR4	2012–2019
Arsenic	8.6 µg/L 86% of the EPA limit 10 µg/L worst single sample: 9.5 µg/L	186/218	SYR4	2012–2019
Copper	278 µg/L 21% of the EPA limit 1300 µg/L worst single sample: 896 µg/L	165/218	SYR4	2013–2019
Nitrate-Nitrite	4692.5 µg/L 47% of the EPA limit 10000 µg/L worst single sample: 5490 µg/L	148/207	SYR4	2012–2019
Fluoride	1262.5 µg/L 32% of the EPA limit 4000 µg/L worst single sample: 1990 µg/L	146/146	SYR4	2012–2019
Selenium	5.05 µg/L 10% of the EPA limit 50 µg/L worst single sample: 6 µg/L	40/50	SYR4	2012–2018
Barium	130 µg/L 6.5% of the EPA limit 2000 µg/L worst single sample: 140 µg/L	38/51	SYR4	2012–2019
Lithium	95.7 µg/L No EPA limit set	30/30	UCMR-5	2024
Chromium	59.1 µg/L 59% of the EPA limit 100 µg/L worst single sample: 61 µg/L	20/51	SYR4	2012–2019
Lead	49.2 µg/L 328% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 60 µg/L	16/218	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	14/14	LCR	2024
Combined Radium (-226 And -228)	0.8700 pCi/L 17% of the EPA limit 5 pCi/L worst single sample: 0.9000 pCi/L	4/22	SYR4	2014–2017

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-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 TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DIDOMIZIO, TOM
Phone: 623-445-2431
Email: [email protected]

Frequently asked questions about Epcor - Agua Fria

Is Epcor - Agua Fria tap water safe to drink?

EPA monitoring detected 14 contaminants in Epcor - Agua Fria'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 Epcor - Agua Fria's water?

EPA monitoring detected TTHM, Nitrate, Total Haloacetic Acids (HAA5), Arsenic, Copper, and others. The full list with the level and data source for each is above.

How many people does Epcor - Agua Fria serve?

Epcor - Agua Fria reports serving 127,718 people in Arizona, per its EPA record.

Has Epcor - Agua Fria had any water quality violations?

The EPA has 510 violations on file for Epcor - Agua Fria, of which 5 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.