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 | Resolved | 2014-08-01 → 2014-08-31 |
| MCL | Health-based | Resolved | 2014-08-01 → 2014-08-31 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-04-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-04-30 |
| MR | Monitoring | Resolved | 2001-08-01 |
| MR | Monitoring | Resolved | 2001-08-01 |
| Other | Monitoring | Archived | 1989-01-01 → 1989-01-31 |
PFAS detected
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0100 µg/L | 1/2 | 2025 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 8.34 µg/L No EPA limit set
worst single sample: 13 µg/L | 105/105 | SYR4 | 2012–2019 |
| Bromoform | 5.9 µg/L No EPA limit set
worst single sample: 7.7 µg/L | 105/105 | SYR4 | 2012–2019 |
| Chloroform | 8.18 µg/L No EPA limit set
worst single sample: 11 µg/L | 105/105 | SYR4 | 2012–2019 |
| Dibromochloromethane | 8.82 µg/L No EPA limit set
worst single sample: 20 µg/L | 105/105 | SYR4 | 2012–2019 |
| TTHM | 24.88 µg/L 31% of the EPA limit 80 µg/L
worst single sample: 46 µg/L | 105/105 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 16 µg/L 27% of the EPA limit 60 µg/L
worst single sample: 30 µg/L | 96/104 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 5.2 µg/L No EPA limit set
worst single sample: 6.6 µg/L | 95/104 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 5.1 µg/L No EPA limit set
worst single sample: 8.9 µg/L | 92/104 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.315 µg/L No EPA limit set
worst single sample: 7.3 µg/L | 60/104 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 8.63 µg/L No EPA limit set
worst single sample: 19 µg/L | 32/104 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2025 |
| Monobromoacetic Acid | 2.975 µg/L No EPA limit set
worst single sample: 3.1 µg/L | 6/104 | SYR4 | 2012–2019 |
| Lithium | 43 µg/L No EPA limit set | 2/2 | UCMR-5 | 2025 |
28 contaminants tested, none detected
Utility contact
Frequently asked questions about Rincon Del Diablo Mwd (id-1)
Is Rincon Del Diablo Mwd (id-1) tap water safe to drink?
EPA monitoring detected 14 contaminants in Rincon Del Diablo Mwd (id-1)'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 Rincon Del Diablo Mwd (id-1)'s water?
EPA monitoring detected Bromodichloromethane, Bromoform, Chloroform, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.
How many people does Rincon Del Diablo Mwd (id-1) serve?
Rincon Del Diablo Mwd (id-1) reports serving 30,757 people in California, per its EPA record.
Has Rincon Del Diablo Mwd (id-1) had any water quality violations?
The EPA has 7 violations on file for Rincon Del Diablo Mwd (id-1), of which 4 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.