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 | 1997-08-01 → 2000-07-31 |
| MR | Monitoring | Resolved | 1997-08-01 → 2000-07-31 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 5100 µg/L 51% of the EPA limit 10000 µg/L
worst single sample: 6600 µg/L | 1116/1270 | SYR4 | 2012–2019 |
| Fluoride | 3600 µg/L 90% of the EPA limit 4000 µg/L
worst single sample: 6400 µg/L | 1065/1066 | SYR4 | 2012–2019 |
| Arsenic | 18 µg/L 180% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 24 µg/L | 889/1434 | SYR4 | 2012–2019 |
| Chloroform | 10 µg/L No EPA limit set
worst single sample: 19 µg/L | 134/139 | SYR4 | 2014–2019 |
| Bromoform | 26.1 µg/L No EPA limit set
worst single sample: 41 µg/L | 120/125 | SYR4 | 2012–2019 |
| Dibromochloromethane | 16.05 µg/L No EPA limit set
worst single sample: 30 µg/L | 120/125 | SYR4 | 2012–2019 |
| TTHM | 54 µg/L 68% of the EPA limit 80 µg/L
worst single sample: 92 µg/L | 120/120 | SYR4 | 2014–2019 |
| Bromodichloromethane | 13 µg/L No EPA limit set
worst single sample: 27 µg/L | 117/125 | SYR4 | 2012–2019 |
| Barium | 222 µg/L 11% of the EPA limit 2000 µg/L
worst single sample: 640 µg/L | 97/151 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 21 µg/L 35% of the EPA limit 60 µg/L
worst single sample: 41 µg/L | 96/120 | SYR4 | 2014–2019 |
| Dibromoacetic Acid | 6.2 µg/L No EPA limit set
worst single sample: 9 µg/L | 91/120 | SYR4 | 2014–2019 |
| Trichloroacetic Acid | 4.76 µg/L No EPA limit set
worst single sample: 5.6 µg/L | 65/120 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 4.52 µg/L No EPA limit set
worst single sample: 6.5 µg/L | 57/120 | SYR4 | 2014–2019 |
| Combined Uranium | 9.64402 µg/L 32% of the EPA limit 30 µg/L
worst single sample: 11.0409 µg/L | 50/52 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 35/35 | LCR | 2025 |
| Chromium | 3.86 µg/L 3.9% of the EPA limit 100 µg/L
worst single sample: 4.2 µg/L | 33/151 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.68 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 25/120 | SYR4 | 2014–2019 |
| Monochloroacetic Acid | 30 µg/L No EPA limit set
worst single sample: 36 µg/L | 16/120 | SYR4 | 2014–2019 |
| Lithium | 44 µg/L No EPA limit set | 15/78 | UCMR-5 | 2024 |
| Selenium | 6.82 µg/L 14% of the EPA limit 50 µg/L
worst single sample: 6.9 µg/L | 5/151 | SYR4 | 2012–2019 |
| Dichloromethane | 0.6900 µg/L 14% of the EPA limit 5 µg/L | 1/144 | SYR4 | 2012–2019 |
| Nitrite | 120 µg/L 12% of the EPA limit 1000 µg/L | 1/151 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.3300 µg/L 33% of the EPA limit 1 µg/L | 1/68 | SYR4 | 2012–2019 |
79 contaminants tested, none detected
Utility contact
Frequently asked questions about Rancho California Water District
Is Rancho California Water District tap water safe to drink?
EPA monitoring detected 31 contaminants in Rancho California 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 Rancho California Water District's water?
EPA monitoring detected Nitrate, Fluoride, Arsenic, Chloroform, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Rancho California Water District serve?
Rancho California Water District reports serving 146,147 people in California, per its EPA record.
Has Rancho California Water District had any water quality violations?
The EPA has 2 violations on file for Rancho California Water District, 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.