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 |
|---|---|---|---|
| MCL | Health-based | Archived | 2025-04-01 → 2025-06-30 |
| MCL | Health-based | Archived | 2025-01-01 → 2025-03-31 |
| TT | Health-based | Unaddressed | 2024-10-17 |
| MCL | Health-based | Archived | 2024-10-01 → 2024-12-31 |
| MCL | Health-based | Archived | 2023-10-01 → 2023-12-31 |
| MCL | Health-based | Archived | 2023-07-01 → 2023-09-30 |
| MCL | Health-based | Archived | 2023-04-01 → 2023-06-30 |
| MCL | Health-based | Archived | 2023-01-01 → 2023-03-31 |
| MCL | Health-based | Archived | 2022-07-01 → 2022-09-30 |
| MCL | Health-based | Archived | 2022-01-01 → 2022-03-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 13000 µg/L 130% of the EPA limit, in the worst sample — 10000 µg/L | 88/88 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 16/16 | LCR | 2025 |
| Barium | 82 µg/L 4.1% of the EPA limit 2000 µg/L | 6/6 | SYR4 | 2012–2019 |
| Fluoride | 810 µg/L 20% of the EPA limit 4000 µg/L | 6/6 | SYR4 | 2012–2019 |
| Arsenic | 3.1 µg/L 31% of the EPA limit 10 µg/L | 5/6 | SYR4 | 2012–2019 |
| Nitrite | 100 µg/L 10% of the EPA limit 1000 µg/L | 5/9 | SYR4 | 2012–2019 |
| Copper | 110 µg/L 8.5% of the EPA limit 1300 µg/L | 2/7 | SYR4 | 2012–2019 |
| Selenium | 5.2 µg/L 10% of the EPA limit 50 µg/L | 2/6 | SYR4 | 2012–2019 |
| Bromoform | 0.7500 µg/L No EPA limit set | 1/5 | SYR4 | 2014–2018 |
| Dibromoacetic Acid | 1.5 µg/L No EPA limit set | 1/5 | SYR4 | 2014–2018 |
| Lead | 1.4 µg/L 9.3% of the EPA limit 15 µg/L | 1/7 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 2.9 µg/L 4.8% of the EPA limit 60 µg/L | 1/5 | SYR4 | 2014–2018 |
| Trichloroacetic Acid | 1.4 µg/L No EPA limit set | 1/5 | SYR4 | 2014–2018 |
39 contaminants tested, none detected
Utility contact
Frequently asked questions about Mettler County Water District
Is Mettler County Water District tap water safe to drink?
EPA monitoring detected 13 contaminants in Mettler County Water District'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 Mettler County Water District's water?
EPA monitoring detected Nitrate, Lead, Barium, Fluoride, Arsenic, and others. The full list with the level and data source for each is above.
How many people does Mettler County Water District serve?
Mettler County Water District reports serving 90 people in California, per its EPA record.
Has Mettler County Water District had any water quality violations?
The EPA has 48 violations on file for Mettler County Water District, of which 22 are health-based (a contaminant limit or required treatment was breached) and 2 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.