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Tap water quality report

Oro Valley Water Utility

EPA monitoring tested this supplier for 104 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
16
detected
42,316
people served
11
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Local government
Counties served
Pima

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.

11
health-based violations
2,190
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2014-01-01 → 2016-12-31
MCL Health-based Resolved 2014-01-01 → 2016-12-31
MCL Health-based Resolved 2014-01-01 → 2016-12-31
MCL Health-based Resolved 2014-01-01 → 2016-12-31
MCL Health-based Resolved 2000-01-01 → 2000-01-31
MCL Health-based Resolved 1999-12-01 → 1999-12-31
MCL Health-based Resolved 1999-11-01 → 1999-11-30
MCL Health-based Resolved 1999-09-01 → 1999-09-30
MCL Health-based Resolved 1999-08-01 → 1999-08-31
MCL Health-based Resolved 1999-07-01 → 1999-07-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2200 µg/L 22%
of the EPA limit 10000 µg/L
worst single sample: 3800 µg/L
256/262 SYR4 2012–2019
TTHM
14 µg/L 18%
of the EPA limit 80 µg/L
worst single sample: 26 µg/L
188/232 SYR4 2012–2019
Copper
175.5 µg/L 14%
of the EPA limit 1300 µg/L
worst single sample: 430 µg/L
90/90 SYR4 2013–2019
Nitrate-Nitrite
2100 µg/L 21%
of the EPA limit 10000 µg/L
worst single sample: 2400 µg/L
46/48 SYR4 2013–2019
Lead
5.065 µg/L 34%
of the EPA limit 15 µg/L
worst single sample: 16 µg/L
40/90 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
2.015 pCi/L 13%
of the EPA limit 15 pCi/L
worst single sample: 2.4 pCi/L
38/51 SYR4 2013–2019
Arsenic
3.04 µg/L 30%
of the EPA limit 10 µg/L
worst single sample: 4.4 µg/L
33/48 SYR4 2013–2019
Combined Uranium
5.225 µg/L 17%
of the EPA limit 30 µg/L
worst single sample: 8.6 µg/L
26/51 SYR4 2013–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Combined Radium (-226 And -228)
1.7 pCi/L 34%
of the EPA limit 5 pCi/L
worst single sample: 1.9 pCi/L
5/51 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
2.74 µg/L 4.6%
of the EPA limit 60 µg/L
worst single sample: 2.9 µg/L
5/232 SYR4 2012–2019
Fluoride
577 µg/L 14%
of the EPA limit 4000 µg/L
worst single sample: 580 µg/L
4/48 SYR4 2013–2019
Lithium
19 µg/L
No EPA limit set
 4/28 UCMR-5 2025
Benzo(A)Pyrene
0.0300 µg/L 15%
of the EPA limit 0.2000 µg/L
 1/100 SYR4 2013–2019
Cyanide
160 µg/L 80%
of the EPA limit 200 µg/L
 1/49 SYR4 2013–2019
Mercury
6.7 µg/L 335%
of the EPA limit, at the 95th percentile of samples — 2 µg/L
 1/52 SYR4 2013–2019
88 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-GammaBariumBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ABRAHAM, PETER
Phone
520-229-5000
Email
[email protected]

Frequently asked questions about Oro Valley Water Utility

Is Oro Valley Water Utility tap water safe to drink?

EPA monitoring detected 16 contaminants in Oro Valley Water Utility'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 Oro Valley Water Utility's water?

EPA monitoring detected Nitrate, TTHM, Copper, Nitrate-Nitrite, Lead, and others. The full list with the level and data source for each is above.

How many people does Oro Valley Water Utility serve?

Oro Valley Water Utility reports serving 42,316 people in Arizona, per its EPA record.

Has Oro Valley Water Utility had any water quality violations?

The EPA has 2190 violations on file for Oro Valley Water Utility, of which 11 are health-based (a contaminant limit or required treatment was breached) and 0 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.