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.
97
health-based violations
247
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2024-10-17 |
| TT | Health-based | Resolved | 2024-10-17 |
| MCL | Health-based | Resolved | 2014-04-01 → 2014-06-30 |
| MCL | Health-based | Resolved | 2014-04-01 → 2014-06-30 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
| MCL | Health-based | Resolved | 2014-01-01 → 2014-03-31 |
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 |
|---|---|---|---|---|
| Arsenic | 11.9 µg/L 119% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 30.4 µg/L | 241/304 | SYR4 | 2012–2019 |
| Combined Uranium | 24.075 µg/L 80% of the EPA limit 30 µg/L
worst single sample: 35.462 µg/L | 234/241 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 9.5345 pCi/L No EPA limit set
worst single sample: 16.1 pCi/L | 232/235 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 19.555 pCi/L 130% of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 48.8 pCi/L | 230/236 | SYR4 | 2012–2019 |
| Copper | 84.96 µg/L 6.5% of the EPA limit 1300 µg/L
worst single sample: 160 µg/L | 209/221 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 878.4 µg/L 8.8% of the EPA limit 10000 µg/L
worst single sample: 2280 µg/L | 207/257 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.351 pCi/L 47% of the EPA limit 5 pCi/L
worst single sample: 4.93 pCi/L | 195/241 | SYR4 | 2012–2019 |
| Nitrate | 752 µg/L 7.5% of the EPA limit 10000 µg/L
worst single sample: 1050 µg/L | 168/176 | SYR4 | 2012–2018 |
| TTHM | 30.71 µg/L 38% of the EPA limit 80 µg/L
worst single sample: 57.28 µg/L | 147/152 | SYR4 | 2012–2019 |
| Fluoride | 796.2 µg/L 20% of the EPA limit 4000 µg/L
worst single sample: 1090 µg/L | 130/167 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 21.03 µg/L 35% of the EPA limit 60 µg/L
worst single sample: 24.55 µg/L | 112/152 | SYR4 | 2012–2019 |
| Barium | 422.8 µg/L 21% of the EPA limit 2000 µg/L
worst single sample: 894 µg/L | 93/93 | SYR4 | 2012–2019 |
| Chloroform | 15.2 µg/L No EPA limit set
worst single sample: 46.2 µg/L | 86/183 | SYR4 | 2012–2019 |
| Chromium | 89.9 µg/L 90% of the EPA limit 100 µg/L
worst single sample: 98.1 µg/L | 86/94 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 15.355 µg/L No EPA limit set
worst single sample: 19 µg/L | 84/104 | SYR4 | 2013–2019 |
| Bromodichloromethane | 5.6015 µg/L No EPA limit set
worst single sample: 8.7 µg/L | 80/183 | SYR4 | 2012–2019 |
| Selenium | 19.285 µg/L 39% of the EPA limit 50 µg/L
worst single sample: 21.7 µg/L | 54/93 | SYR4 | 2012–2019 |
| Dibromochloromethane | 7.087 µg/L No EPA limit set
worst single sample: 7.1 µg/L | 34/183 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 2.5595 µg/L No EPA limit set
worst single sample: 5.55 µg/L | 24/104 | SYR4 | 2013–2019 |
| Antimony, Total | 3.4825 µg/L 58% of the EPA limit 6 µg/L
worst single sample: 3.67 µg/L | 22/93 | SYR4 | 2012–2019 |
| Lead | 0.00055 mg/L 3.7% of the EPA limit 0.0150 mg/L | 22/22 | LCR | 2025 |
| Lithium | 17.7 µg/L No EPA limit set | 19/34 | UCMR-5 | 2025 |
| Simazine | 1.16 µg/L 29% of the EPA limit 4 µg/L
worst single sample: 1.4 µg/L | 17/181 | SYR4 | 2018–2019 |
| Lead | 5.778 µg/L 39% of the EPA limit 15 µg/L
worst single sample: 8 µg/L | 12/221 | SYR4 | 2012–2019 |
| Cyanide | 18.1 µg/L 9.1% of the EPA limit 200 µg/L
worst single sample: 18.3 µg/L | 11/83 | SYR4 | 2012–2019 |
| Nitrite | 281.8 µg/L 28% of the EPA limit 1000 µg/L
worst single sample: 415 µg/L | 9/112 | SYR4 | 2012–2019 |
| 2,4-D | 0.2850 µg/L 0.4% of the EPA limit 70 µg/L
worst single sample: 0.3000 µg/L | 4/176 | SYR4 | 2018–2019 |
| Di(2-ethylhexyl) Phthalate | 1.06 µg/L 18% of the EPA limit 6 µg/L
worst single sample: 1.1 µg/L | 3/179 | SYR4 | 2018–2019 |
| Dibromoacetic Acid | 1.434 µg/L No EPA limit set
worst single sample: 1.47 µg/L | 3/104 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 3.559 µg/L No EPA limit set
worst single sample: 3.7 µg/L | 3/104 | SYR4 | 2013–2019 |
| Cadmium | 0.1437 µg/L 2.9% of the EPA limit 5 µg/L
worst single sample: 0.1440 µg/L | 2/93 | SYR4 | 2012–2019 |
| Thallium, Total | 0.3988 µg/L 20% of the EPA limit 2 µg/L
worst single sample: 0.4000 µg/L | 2/93 | SYR4 | 2012–2019 |
| Toluene | 11.065 µg/L 1.1% of the EPA limit 1000 µg/L
worst single sample: 11.6 µg/L | 2/214 | SYR4 | 2012–2019 |
| Dichloromethane | 0.6100 µg/L 12% of the EPA limit 5 µg/L | 1/214 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.1600 µg/L 16% of the EPA limit 1 µg/L | 1/176 | SYR4 | 2018–2019 |
75 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPicloramStyreneTetrachloroethyleneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Norman Utilities Authority
Is Norman Utilities Authority tap water safe to drink?
EPA monitoring detected 37 contaminants in Norman Utilities Authority'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 Norman Utilities Authority's water?
EPA monitoring detected Arsenic, Combined Uranium, Gross Beta Particle Activity, Gross Alpha, Excl. Radon And U, Copper, and others. The full list with the level and data source for each is above.
How many people does Norman Utilities Authority serve?
Norman Utilities Authority reports serving 104,868 people in Oklahoma, per its EPA record.
Has Norman Utilities Authority had any water quality violations?
The EPA has 247 violations on file for Norman Utilities Authority, of which 97 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.