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 |
|---|---|---|---|
| MR | Monitoring | Unaddressed | 2025-12-30 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 379 µg/L 29% of the EPA limit 1300 µg/L
worst single sample: 597 µg/L | 61/64 | SYR4 | 2013–2019 |
| Dibromochloromethane | 8.28 µg/L No EPA limit set
worst single sample: 10.2 µg/L | 17/22 | SYR4 | 2013–2019 |
| Nitrate | 80 µg/L 0.8% of the EPA limit 10000 µg/L | 16/32 | SYR4 | 2012–2019 |
| Bromodichloromethane | 4.785 µg/L No EPA limit set
worst single sample: 5.5 µg/L | 14/22 | SYR4 | 2013–2019 |
| Lead | 0.0022 mg/L 15% of the EPA limit 0.0150 mg/L | 14/14 | LCR | 2025 |
| Bromoform | 5.44 µg/L No EPA limit set
worst single sample: 7 µg/L | 13/22 | SYR4 | 2013–2019 |
| Lead | 6.675 µg/L 45% of the EPA limit 15 µg/L
worst single sample: 9.24 µg/L | 10/64 | SYR4 | 2013–2019 |
| TTHM | 22.395 µg/L 28% of the EPA limit 80 µg/L
worst single sample: 24.6 µg/L | 8/8 | SYR4 | 2013–2019 |
| Chloroform | 1.9 µg/L No EPA limit set | 7/22 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 3.58 µg/L No EPA limit set
worst single sample: 4.3 µg/L | 7/8 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 6.18 µg/L 10% of the EPA limit 60 µg/L
worst single sample: 7.2 µg/L | 7/8 | SYR4 | 2013–2019 |
| Xylenes, Total | 2.8 µg/L 0% of the EPA limit 10000 µg/L
worst single sample: 3.1 µg/L | 7/14 | SYR4 | 2014–2019 |
| Dibromoacetic Acid | 1.975 µg/L No EPA limit set
worst single sample: 2 µg/L | 6/8 | SYR4 | 2013–2019 |
| Barium | 178.5 µg/L 8.9% of the EPA limit 2000 µg/L
worst single sample: 180 µg/L | 4/4 | SYR4 | 2014–2017 |
| Fluoride | 364 µg/L 9.1% of the EPA limit 4000 µg/L
worst single sample: 370 µg/L | 4/4 | SYR4 | 2014–2017 |
| Nitrate-Nitrite | 39 µg/L 0.4% of the EPA limit 10000 µg/L
worst single sample: 40 µg/L | 3/6 | SYR4 | 2012–2015 |
| Gross Beta Particle Activity | 6.375 pCi/L No EPA limit set
worst single sample: 6.4 pCi/L | 2/2 | SYR4 | 2015 |
| Lithium | 49 µg/L No EPA limit set | 2/2 | UCMR-5 | 2025 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2015 |
| Gross Alpha, Excl. Radon And U | 3.2 pCi/L 21% of the EPA limit 15 pCi/L | 1/2 | SYR4 | 2015 |
| Selenium | 4.1 µg/L 8.2% of the EPA limit 50 µg/L | 1/4 | SYR4 | 2014–2017 |
| Trichloroacetic Acid | 2.9 µg/L No EPA limit set | 1/8 | SYR4 | 2013–2019 |
87 contaminants tested, none detected
Utility contact
Frequently asked questions about Oak Hills Wsc
Is Oak Hills Wsc tap water safe to drink?
EPA monitoring detected 22 contaminants in Oak Hills Wsc'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 Oak Hills Wsc's water?
EPA monitoring detected Copper, Dibromochloromethane, Nitrate, Bromodichloromethane, Lead, and others. The full list with the level and data source for each is above.
How many people does Oak Hills Wsc serve?
Oak Hills Wsc reports serving 6,225 people in Texas, per its EPA record.
Has Oak Hills Wsc had any water quality violations?
The EPA has 1 violation on file for Oak Hills Wsc, of which 0 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.