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 | Unaddressed | 2024-10-17 |
| MCL | Health-based | Archived | 2024-04-01 → 2025-06-30 |
| MCL | Health-based | Resolved | 2017-10-01 → 2017-12-31 |
| MCL | Health-based | Resolved | 2017-10-01 → 2017-12-31 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-04-01 → 2017-06-30 |
| MCL | Health-based | Resolved | 2017-04-01 → 2017-06-30 |
| MCL | Health-based | Resolved | 2017-01-01 → 2017-03-31 |
| MCL | Health-based | Resolved | 2017-01-01 → 2017-03-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Arsenic | 71 µg/L 710% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 75 µg/L | 155/161 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 6/6 | LCR | 2021 |
| Barium | 99.535 µg/L 5% of the EPA limit 2000 µg/L
worst single sample: 100 µg/L | 2/2 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 16.27 µg/L No EPA limit set
worst single sample: 17 µg/L | 2/2 | SYR4 | 2015–2018 |
| Total Haloacetic Acids (HAA5) | 45.82 µg/L 76% of the EPA limit 60 µg/L
worst single sample: 48 µg/L | 2/2 | SYR4 | 2015–2018 |
| Trichloroacetic Acid | 23.85 µg/L No EPA limit set
worst single sample: 25 µg/L | 2/2 | SYR4 | 2015–2018 |
| Bromodichloromethane | 7.4 µg/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Chloroform | 64 µg/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Dibromochloromethane | 0.5200 µg/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Gross Beta Particle Activity | 1.62 pCi/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Monochloroacetic Acid | 6.2 µg/L No EPA limit set | 1/2 | SYR4 | 2015–2018 |
| TTHM | 71.6 µg/L 89% of the EPA limit 80 µg/L | 1/1 | SYR4 | 2015 |
18 contaminants tested, none detected
Utility contact
Frequently asked questions about Rancho Marina
Is Rancho Marina tap water safe to drink?
EPA monitoring detected 12 contaminants in Rancho Marina'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 Rancho Marina's water?
EPA monitoring detected Arsenic, Lead, Barium, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Rancho Marina serve?
Rancho Marina reports serving 250 people in California, per its EPA record.
Has Rancho Marina had any water quality violations?
The EPA has 144 violations on file for Rancho Marina, of which 110 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.