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.
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
| TT | Health-based | Resolved | 2023-02-01 → 2023-02-28 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Fluoride | 928 µg/L 23% of the EPA limit 4000 µg/L
worst single sample: 1100 µg/L | 99/99 | SYR4 | 2012–2019 |
| TTHM | 31.275 µg/L 39% of the EPA limit 80 µg/L
worst single sample: 34.9 µg/L | 86/86 | SYR4 | 2012–2019 |
| Bromodichloromethane | 11.6 µg/L No EPA limit set
worst single sample: 14.4 µg/L | 81/81 | SYR4 | 2012–2019 |
| Chloroform | 16.9 µg/L No EPA limit set
worst single sample: 21 µg/L | 81/81 | SYR4 | 2012–2019 |
| Dibromochloromethane | 6.9195 µg/L No EPA limit set
worst single sample: 8.95 µg/L | 74/81 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 31.9 µg/L 53% of the EPA limit 60 µg/L
worst single sample: 39.7 µg/L | 69/86 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 22.2 µg/L No EPA limit set
worst single sample: 24.3 µg/L | 61/76 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 6.2875 µg/L No EPA limit set
worst single sample: 8.06 µg/L | 56/76 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4.535 µg/L No EPA limit set
worst single sample: 4.99 µg/L | 52/76 | SYR4 | 2012–2019 |
| Copper | 117 µg/L 9% of the EPA limit 1300 µg/L
worst single sample: 298 µg/L | 46/133 | SYR4 | 2012–2018 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L | 18/18 | LCR | 2025 |
| Bromoform | 4.0075 µg/L No EPA limit set
worst single sample: 4.15 µg/L | 16/81 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 6.236 µg/L No EPA limit set
worst single sample: 6.32 µg/L | 8/76 | SYR4 | 2012–2019 |
| Lead | 21.4 µg/L 143% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 26.5 µg/L | 7/133 | SYR4 | 2012–2018 |
| Nitrate-Nitrite | 1204 µg/L 12% of the EPA limit 10000 µg/L
worst single sample: 1210 µg/L | 7/7 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.048 µg/L No EPA limit set
worst single sample: 2.09 µg/L | 5/76 | SYR4 | 2012–2019 |
| Barium | 51.85 µg/L 2.6% of the EPA limit 2000 µg/L
worst single sample: 52 µg/L | 4/4 | SYR4 | 2012–2015 |
| Lithium | 21.6 µg/L No EPA limit set | 4/4 | UCMR-5 | 2024 |
| Bromate | 9.146 µg/L 91% of the EPA limit 10 µg/L
worst single sample: 9.3 µg/L | 3/92 | SYR4 | 2012–2019 |
| Nitrate | 1111 µg/L 11% of the EPA limit 10000 µg/L | 2/2 | SYR4 | 2019 |
| Cyanide | 15 µg/L 7.5% of the EPA limit 200 µg/L | 1/1 | SYR4 | 2012 |
| Combined Radium (-226 And -228) | 0.1580 pCi/L 3.2% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2014 |
| Gross Alpha, Excl. Radon And U | 1.05 pCi/L 7% of the EPA limit 15 pCi/L | 1/1 | SYR4 | 2014 |
| Gross Beta Particle Activity | 5 pCi/L No EPA limit set | 1/1 | SYR4 | 2014 |
| Selenium | 8 µg/L 16% of the EPA limit 50 µg/L | 1/4 | SYR4 | 2012–2015 |
54 contaminants tested, none detected
Utility contact
Frequently asked questions about Stillwater Utilities Authority
Is Stillwater Utilities Authority tap water safe to drink?
EPA monitoring detected 30 contaminants in Stillwater 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 Stillwater Utilities Authority's water?
EPA monitoring detected Fluoride, TTHM, Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Stillwater Utilities Authority serve?
Stillwater Utilities Authority reports serving 53,000 people in Oklahoma, per its EPA record.
Has Stillwater Utilities Authority had any water quality violations?
The EPA has 138 violations on file for Stillwater Utilities Authority, of which 80 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.