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 | Addressed | 2024-10-17 |
| TT | Health-based | Addressed | 2024-10-17 |
| MCL | Health-based | Resolved | 1995-08-01 → 1995-08-31 |
| MCL | Health-based | Resolved | 1995-08-01 → 1995-08-31 |
| MCL | Health-based | Resolved | 1995-08-01 → 1995-08-31 |
| MR | Monitoring | Resolved | 2025-07-01 |
| MR | Monitoring | Resolved | 2025-07-01 |
| MR | Monitoring | Resolved | 2025-07-01 |
| MR | Monitoring | Resolved | 2025-07-01 |
| RPT | Monitoring | Addressed | 2024-10-17 |
PFAS detected
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0170 µg/L | 1/2 | 2025 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 113 µg/L 141% of the EPA limit, in the worst sample — 80 µg/L | 64/64 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 109 µg/L 182% of the EPA limit, in the worst sample — 60 µg/L | 63/63 | SYR4 | 2012–2019 |
| Bromodichloromethane | 21 µg/L No EPA limit set | 50/50 | SYR4 | 2013–2019 |
| Chloroform | 88.9 µg/L No EPA limit set | 50/50 | SYR4 | 2013–2019 |
| Dibromochloromethane | 9.62 µg/L No EPA limit set | 49/50 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 39.6 µg/L No EPA limit set | 49/49 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 30.8 µg/L No EPA limit set | 48/49 | SYR4 | 2013–2019 |
| Copper | 305 µg/L 23% of the EPA limit 1300 µg/L | 38/100 | SYR4 | 2014–2017 |
| Dibromoacetic Acid | 2.27 µg/L No EPA limit set | 27/49 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 6.76 µg/L No EPA limit set | 12/49 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 10/10 | LCR | 2026 |
| Monobromoacetic Acid | 1.49 µg/L No EPA limit set | 10/49 | SYR4 | 2013–2019 |
| Lead | 20.9 µg/L 139% of the EPA limit, in the worst sample — 15 µg/L | 3/100 | SYR4 | 2014–2017 |
| Bromoform | 1.15 µg/L No EPA limit set | 2/50 | SYR4 | 2013–2019 |
29 contaminants tested, none detected
Utility contact
Frequently asked questions about Mayes Co Rwd #4
Is Mayes Co Rwd #4 tap water safe to drink?
EPA monitoring detected 15 contaminants in Mayes Co Rwd #4'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 Mayes Co Rwd #4's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Mayes Co Rwd #4 serve?
Mayes Co Rwd #4 reports serving 4,183 people in Oklahoma, per its EPA record.
Has Mayes Co Rwd #4 had any water quality violations?
The EPA has 27 violations on file for Mayes Co Rwd #4, of which 5 are health-based (a contaminant limit or required treatment was breached) and 4 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.