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 | 2024-10-17 |
| TT | Health-based | Resolved | 2024-10-17 |
| MCL | Health-based | Resolved | 2013-02-01 → 2013-02-28 |
| MCL | Health-based | Resolved | 2013-02-01 → 2013-02-28 |
| MCL | Health-based | Resolved | 2013-02-01 → 2013-02-28 |
| MCL | Health-based | Resolved | 2013-02-01 → 2013-02-28 |
| MCL | Health-based | Resolved | 2011-10-01 → 2011-10-31 |
| MCL | Health-based | Resolved | 2011-10-01 → 2011-10-31 |
| MCL | Health-based | Resolved | 2011-10-01 → 2011-10-31 |
| MCL | Health-based | Resolved | 2005-12-01 → 2005-12-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 294.6 µg/L 23% of the EPA limit 1300 µg/L
worst single sample: 753 µg/L | 150/154 | SYR4 | 2013–2017 |
| TTHM | 58.165 µg/L 73% of the EPA limit 80 µg/L
worst single sample: 72.6 µg/L | 82/82 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 19.395 µg/L 32% of the EPA limit 60 µg/L
worst single sample: 23 µg/L | 82/82 | SYR4 | 2012–2019 |
| Bromodichloromethane | 14.26 µg/L No EPA limit set
worst single sample: 16 µg/L | 58/58 | SYR4 | 2013–2019 |
| Chloroform | 34.235 µg/L No EPA limit set
worst single sample: 39.4 µg/L | 58/58 | SYR4 | 2013–2019 |
| Dibromochloromethane | 6.757 µg/L No EPA limit set
worst single sample: 8.12 µg/L | 58/58 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 10.305 µg/L No EPA limit set
worst single sample: 13.7 µg/L | 58/58 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 8.1525 µg/L No EPA limit set
worst single sample: 10 µg/L | 58/58 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 1.881 µg/L No EPA limit set
worst single sample: 2 µg/L | 15/58 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2022 |
| Bromoform | 1.1255 µg/L No EPA limit set
worst single sample: 1.13 µg/L | 2/58 | SYR4 | 2013–2019 |
| Lead | 6.84 µg/L 46% of the EPA limit 15 µg/L
worst single sample: 6.9 µg/L | 2/154 | SYR4 | 2013–2017 |
| Monochloroacetic Acid | 5.09 µg/L No EPA limit set | 1/58 | SYR4 | 2013–2019 |
31 contaminants tested, none detected
Utility contact
Frequently asked questions about Owasso
Is Owasso tap water safe to drink?
EPA monitoring detected 13 contaminants in Owasso'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 Owasso's water?
EPA monitoring detected Copper, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Owasso serve?
Owasso reports serving 23,000 people in Oklahoma, per its EPA record.
Has Owasso had any water quality violations?
The EPA has 73 violations on file for Owasso, of which 27 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.