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 | 1996-08-01 → 1996-08-31 |
| MCL | Health-based | Resolved | 1996-08-01 → 1996-08-31 |
| MON | Monitoring | Archived | 2025-05-01 → 2025-06-30 |
| MR | Monitoring | Resolved | 2012-01-01 → 2012-12-31 |
| MR | Monitoring | Resolved | 2012-01-01 → 2012-12-31 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 7910 µg/L 79% of the EPA limit 10000 µg/L
worst single sample: 8362 µg/L | 328/362 | SYR4 | 2012–2019 |
| Bromodichloromethane | 22.54 µg/L No EPA limit set
worst single sample: 50.3 µg/L | 129/129 | SYR4 | 2012–2019 |
| Chloroform | 39.96 µg/L No EPA limit set
worst single sample: 124.6 µg/L | 129/129 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 18.1 µg/L No EPA limit set
worst single sample: 51.1 µg/L | 129/129 | SYR4 | 2012–2019 |
| TTHM | 78.06 µg/L 98% of the EPA limit 80 µg/L
worst single sample: 171.6 µg/L | 129/129 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 31.56 µg/L 53% of the EPA limit 60 µg/L
worst single sample: 97.1 µg/L | 129/129 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 9.25 µg/L No EPA limit set
worst single sample: 37.7 µg/L | 126/129 | SYR4 | 2012–2019 |
| Dibromochloromethane | 18.54 µg/L No EPA limit set
worst single sample: 38.7 µg/L | 125/129 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 8.285 µg/L No EPA limit set
worst single sample: 13.2 µg/L | 124/129 | SYR4 | 2012–2019 |
| Bromoform | 10.3 µg/L No EPA limit set
worst single sample: 12.9 µg/L | 92/129 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 45/45 | LCR | 2026 |
| Monochloroacetic Acid | 3.44 µg/L No EPA limit set
worst single sample: 5.6 µg/L | 29/129 | SYR4 | 2012–2019 |
| Fluoride | 310 µg/L 7.8% of the EPA limit 4000 µg/L
worst single sample: 340 µg/L | 22/24 | SYR4 | 2012–2018 |
| Monobromoacetic Acid | 1.495 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 8/129 | SYR4 | 2012–2019 |
| Lithium | 60 µg/L No EPA limit set | 8/8 | UCMR-5 | 2024 |
| Nitrate-Nitrite | 443490 µg/L 4435% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 630000 µg/L | 7/12 | SYR4 | 2014–2018 |
| Selenium | 7.675 µg/L 15% of the EPA limit 50 µg/L
worst single sample: 8.1 µg/L | 6/24 | SYR4 | 2012–2018 |
| Arsenic | 23.8 µg/L 238% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 24 µg/L | 5/26 | SYR4 | 2012–2018 |
| Combined Uranium | 9.20075 µg/L 31% of the EPA limit 30 µg/L
worst single sample: 9.536 µg/L | 2/3 | SYR4 | 2012–2013 |
| Cadmium | 2 µg/L 40% of the EPA limit 5 µg/L | 1/26 | SYR4 | 2012–2018 |
58 contaminants tested, none detected
Utility contact
Frequently asked questions about City of Arroyo Grande Utilities Division
Is City of Arroyo Grande Utilities Division tap water safe to drink?
EPA monitoring detected 26 contaminants in City of Arroyo Grande Utilities 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 Arroyo Grande Utilities Division's water?
EPA monitoring detected Nitrate, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.
How many people does City of Arroyo Grande Utilities Division serve?
City of Arroyo Grande Utilities Division reports serving 17,963 people in California, per its EPA record.
Has City of Arroyo Grande Utilities Division had any water quality violations?
The EPA has 5 violations on file for City of Arroyo Grande Utilities 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.