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 | 1997-11-01 → 1997-11-30 |
| MCL | Health-based | Resolved | 1997-11-01 → 1997-11-30 |
| MON | Monitoring | Resolved | 2022-10-01 → 2022-10-31 |
| MON | Monitoring | Resolved | 2022-10-01 → 2022-10-31 |
| MON | Monitoring | Resolved | 2022-10-01 → 2022-10-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 5.8 µg/L No EPA limit set
worst single sample: 10.5 µg/L | 257/257 | SYR4 | 2012–2019 |
| Bromoform | 15.52 µg/L No EPA limit set
worst single sample: 50.2 µg/L | 257/257 | SYR4 | 2012–2019 |
| Dibromochloromethane | 12.08 µg/L No EPA limit set
worst single sample: 31.2 µg/L | 257/257 | SYR4 | 2012–2019 |
| TTHM | 32.72 µg/L 41% of the EPA limit 80 µg/L
worst single sample: 95.7 µg/L | 257/257 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 10.625 µg/L 18% of the EPA limit 60 µg/L
worst single sample: 40 µg/L | 256/256 | SYR4 | 2012–2019 |
| Chloroform | 5.135 µg/L No EPA limit set
worst single sample: 7.6 µg/L | 194/257 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 6.285 µg/L No EPA limit set
worst single sample: 10 µg/L | 184/184 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 4.13 µg/L No EPA limit set
worst single sample: 6.4 µg/L | 158/184 | SYR4 | 2014–2019 |
| Trichloroacetic Acid | 2.2 µg/L No EPA limit set
worst single sample: 4.6 µg/L | 62/184 | SYR4 | 2014–2019 |
| Monobromoacetic Acid | 1.8 µg/L No EPA limit set
worst single sample: 2.9 µg/L | 58/184 | SYR4 | 2014–2019 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L | 40/40 | LCR | 2024 |
| Lithium | 17.9 µg/L No EPA limit set | 4/4 | UCMR-5 | 2024 |
| Monochloroacetic Acid | 32.3 µg/L No EPA limit set | 1/184 | SYR4 | 2014–2019 |
29 contaminants tested, none detected
Utility contact
Frequently asked questions about Cal American Water Co
Is Cal American Water Co tap water safe to drink?
EPA monitoring detected 13 contaminants in Cal American Water Co'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 Cal American Water Co's water?
EPA monitoring detected Bromodichloromethane, Bromoform, Dibromochloromethane, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Cal American Water Co serve?
Cal American Water Co reports serving 66,809 people in California, per its EPA record.
Has Cal American Water Co had any water quality violations?
The EPA has 5 violations on file for Cal American Water Co, of which 2 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.