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 | Resolved | 1993-06-01 → 1993-06-30 |
| TT | Health-based | Resolved | 1993-06-01 → 1993-06-30 |
| MR | Monitoring | Resolved | 2015-06-01 |
| MR | Monitoring | Resolved | 2015-06-01 |
| MR | Monitoring | Resolved | 2008-04-01 → 2008-04-30 |
| MR | Monitoring | Resolved | 2008-04-01 → 2008-04-30 |
| MR | Monitoring | Resolved | 1993-06-30 → 2000-03-01 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Arsenic | 21 µg/L 210% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 36 µg/L | 291/371 | SYR4 | 2012–2019 |
| Nitrate | 3845 µg/L 38% of the EPA limit 10000 µg/L
worst single sample: 7232 µg/L | 232/306 | SYR4 | 2012–2019 |
| TTHM | 60.52 µg/L 76% of the EPA limit 80 µg/L
worst single sample: 83 µg/L | 87/93 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 18.85 µg/L 31% of the EPA limit 60 µg/L
worst single sample: 24.4 µg/L | 87/87 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13.725 µg/L No EPA limit set
worst single sample: 17 µg/L | 86/93 | SYR4 | 2012–2019 |
| Chloroform | 19.51 µg/L No EPA limit set
worst single sample: 27 µg/L | 83/93 | SYR4 | 2012–2019 |
| Dibromochloromethane | 24.97 µg/L No EPA limit set
worst single sample: 30 µg/L | 83/93 | SYR4 | 2012–2019 |
| Selenium | 28.1 µg/L 56% of the EPA limit 50 µg/L
worst single sample: 41 µg/L | 79/123 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 8.67 µg/L No EPA limit set
worst single sample: 10.3 µg/L | 74/87 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 10.72 µg/L No EPA limit set
worst single sample: 13.2 µg/L | 69/87 | SYR4 | 2012–2019 |
| Bromoform | 24.44 µg/L No EPA limit set
worst single sample: 41 µg/L | 67/93 | SYR4 | 2012–2019 |
| Fluoride | 494 µg/L 12% of the EPA limit 4000 µg/L
worst single sample: 960 µg/L | 55/55 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 46/46 | LCR | 2025 |
| Trichloroacetic Acid | 9.55 µg/L No EPA limit set
worst single sample: 13 µg/L | 46/87 | SYR4 | 2012–2019 |
| Combined Uranium | 8.5526 µg/L 29% of the EPA limit 30 µg/L
worst single sample: 11.175 µg/L | 45/45 | SYR4 | 2012–2019 |
| Barium | 246 µg/L 12% of the EPA limit 2000 µg/L
worst single sample: 330 µg/L | 25/55 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 910000 µg/L 9100% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 980000 µg/L | 25/37 | SYR4 | 2012–2019 |
| Lithium | 46.2 µg/L No EPA limit set | 19/23 | UCMR-5 | 2025 |
| Monobromoacetic Acid | 2.05 µg/L No EPA limit set
worst single sample: 2.1 µg/L | 6/87 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3.38 µg/L No EPA limit set
worst single sample: 3.5 µg/L | 3/87 | SYR4 | 2012–2019 |
| Lead | 7.1 µg/L 47% of the EPA limit 15 µg/L | 1/55 | SYR4 | 2012–2019 |
83 contaminants tested, none detected
Utility contact
Frequently asked questions about City of Paso Robles Water Division
Is City of Paso Robles Water Division tap water safe to drink?
EPA monitoring detected 28 contaminants in City of Paso Robles Water Division'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 City of Paso Robles Water Division's water?
EPA monitoring detected Arsenic, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does City of Paso Robles Water Division serve?
City of Paso Robles Water Division reports serving 31,176 people in California, per its EPA record.
Has City of Paso Robles Water Division had any water quality violations?
The EPA has 7 violations on file for City of Paso Robles Water Division, 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.