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 | Resolved | 2024-10-01 |
| MR | Monitoring | Resolved | 2024-10-01 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-12-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-12-31 |
| MR | Monitoring | Resolved | 2020-01-01 → 2020-12-31 |
| MR | Monitoring | Resolved | 2020-01-01 → 2020-12-31 |
| MR | Monitoring | Resolved | 2018-10-01 |
| MR | Monitoring | Resolved | 2018-10-01 |
| MR | Monitoring | Resolved | 2018-06-01 |
| MR | Monitoring | Resolved | 2018-06-01 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 4/4 | LCR | 2027 |
| Nitrate | 1200 µg/L 12% of the EPA limit 10000 µg/L | 4/30 | SYR4 | 2015–2019 |
| Fluoride | 420 µg/L 11% of the EPA limit 4000 µg/L | 3/3 | SYR4 | 2016–2018 |
| Arsenic | 2.1 µg/L 21% of the EPA limit 10 µg/L | 1/3 | SYR4 | 2016–2018 |
| Combined Uranium | 3.278 µg/L 11% of the EPA limit 30 µg/L | 1/1 | SYR4 | 2018 |
| Gross Beta Particle Activity | 5.7 pCi/L No EPA limit set | 1/1 | SYR4 | 2018 |
56 contaminants tested, none detected
Utility contact
Frequently asked questions about Los Prietos Complex
Is Los Prietos Complex tap water safe to drink?
EPA monitoring detected 6 contaminants in Los Prietos Complex'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 Los Prietos Complex's water?
EPA monitoring detected Lead, Nitrate, Fluoride, Arsenic, Combined Uranium, and others. The full list with the level and data source for each is above.
How many people does Los Prietos Complex serve?
Los Prietos Complex reports serving 845 people in California, per its EPA record.
Has Los Prietos Complex had any water quality violations?
The EPA has 13 violations on file for Los Prietos Complex, of which 0 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.