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 |
|---|---|---|---|
| MON | Monitoring | Resolved | 2017-04-01 → 2017-04-30 |
| MON | Monitoring | Resolved | 2017-04-01 → 2017-04-30 |
| MR | Monitoring | Resolved | 2011-11-01 → 2011-11-30 |
| MR | Monitoring | Resolved | 2011-11-01 → 2011-11-30 |
| MR | Monitoring | Resolved | 2011-10-01 → 2011-10-31 |
| MR | Monitoring | Resolved | 2011-10-01 → 2011-10-31 |
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 | 52/52 | LCR | 2025 |
| Nitrate | 7695 µg/L 77% of the EPA limit 10000 µg/L
worst single sample: 7800 µg/L | 28/32 | SYR4 | 2013–2019 |
| Bromoform | 12.35 µg/L No EPA limit set
worst single sample: 13.5 µg/L | 6/6 | SYR4 | 2013–2019 |
| Dibromochloromethane | 3.125 µg/L No EPA limit set
worst single sample: 3.3 µg/L | 6/6 | SYR4 | 2013–2019 |
| Fluoride | 205 µg/L 5.1% of the EPA limit 4000 µg/L
worst single sample: 210 µg/L | 6/9 | SYR4 | 2013–2018 |
| TTHM | 14.575 µg/L 18% of the EPA limit 80 µg/L
worst single sample: 15.6 µg/L | 6/6 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 3.28 µg/L No EPA limit set
worst single sample: 3.3 µg/L | 5/6 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 3.28 µg/L 5.5% of the EPA limit 60 µg/L
worst single sample: 3.3 µg/L | 5/6 | SYR4 | 2013–2019 |
| Chromium | 45.3 µg/L 45% of the EPA limit 100 µg/L
worst single sample: 48 µg/L | 4/6 | SYR4 | 2014–2018 |
| Nitrate-Nitrite | 640000 µg/L 6400% of the EPA limit, at the 95th percentile of samples — 10000 µg/L | 4/4 | SYR4 | 2014–2015 |
| Selenium | 24.21 µg/L 48% of the EPA limit 50 µg/L
worst single sample: 27 µg/L | 4/6 | SYR4 | 2014–2018 |
| Arsenic | 3.4 µg/L 34% of the EPA limit 10 µg/L
worst single sample: 3.5 µg/L | 3/7 | SYR4 | 2013–2018 |
| Barium | 104.3 µg/L 5.2% of the EPA limit 2000 µg/L
worst single sample: 110 µg/L | 3/6 | SYR4 | 2014–2018 |
| Lithium | 61 µg/L No EPA limit set | 2/2 | UCMR-5 | 2023 |
| Copper | 5.8 µg/L 0.4% of the EPA limit 1300 µg/L | 1/8 | SYR4 | 2013–2018 |
70 contaminants tested, none detected
Utility contact
Frequently asked questions about Mission Hills Csd
Is Mission Hills Csd tap water safe to drink?
EPA monitoring detected 15 contaminants in Mission Hills Csd'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 Mission Hills Csd's water?
EPA monitoring detected Lead, Nitrate, Bromoform, Dibromochloromethane, Fluoride, and others. The full list with the level and data source for each is above.
How many people does Mission Hills Csd serve?
Mission Hills Csd reports serving 3,600 people in California, per its EPA record.
Has Mission Hills Csd had any water quality violations?
The EPA has 6 violations on file for Mission Hills Csd, 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.