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 | 2008-01-01 → 2008-03-31 |
| MCL | Health-based | Resolved | 2008-01-01 → 2008-03-31 |
| MCL | Health-based | Resolved | 1993-11-01 → 1993-11-30 |
| MCL | Health-based | Resolved | 1993-11-01 → 1993-11-30 |
| MON | Monitoring | Resolved | 2021-06-01 → 2021-06-30 |
| MON | Monitoring | Resolved | 2021-06-01 → 2021-06-30 |
| MR | Monitoring | Resolved | 1993-11-01 → 1993-11-30 |
| MR | Monitoring | Resolved | 1993-11-01 → 1993-11-30 |
| MR | Monitoring | Resolved | 1993-11-01 → 1993-11-30 |
| MR | Monitoring | Resolved | 1993-11-01 → 1993-11-30 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Arsenic | 7.02 µg/L 70% of the EPA limit 10 µg/L
worst single sample: 12 µg/L | 217/265 | SYR4 | 2012–2019 |
| Nitrate | 2486 µg/L 25% of the EPA limit 10000 µg/L
worst single sample: 3000 µg/L | 54/66 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 50/50 | LCR | 2025 |
| Fluoride | 319 µg/L 8% of the EPA limit 4000 µg/L
worst single sample: 330 µg/L | 12/12 | SYR4 | 2013–2019 |
| TTHM | 6.35 µg/L 7.9% of the EPA limit 80 µg/L
worst single sample: 6.6 µg/L | 11/12 | SYR4 | 2014–2019 |
| Dibromochloromethane | 2.965 µg/L No EPA limit set
worst single sample: 3.1 µg/L | 10/12 | SYR4 | 2014–2019 |
| Bromoform | 2.3 µg/L No EPA limit set | 8/12 | SYR4 | 2014–2019 |
| Dibromoacetic Acid | 1.5 µg/L No EPA limit set | 4/12 | SYR4 | 2014–2019 |
| Total Haloacetic Acids (HAA5) | 1.5 µg/L 2.5% of the EPA limit 60 µg/L | 4/12 | SYR4 | 2014–2019 |
| Bromodichloromethane | 1.68 µg/L No EPA limit set
worst single sample: 1.7 µg/L | 3/12 | SYR4 | 2014–2019 |
| Lithium | 18.5 µg/L No EPA limit set | 2/4 | UCMR-5 | 2024 |
92 contaminants tested, none detected
Utility contact
Frequently asked questions about South Montebello Irrigation Dist.
Is South Montebello Irrigation Dist. tap water safe to drink?
EPA monitoring detected 17 contaminants in South Montebello Irrigation Dist.'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 South Montebello Irrigation Dist.'s water?
EPA monitoring detected Arsenic, Nitrate, Lead, Fluoride, TTHM, and others. The full list with the level and data source for each is above.
How many people does South Montebello Irrigation Dist. serve?
South Montebello Irrigation Dist. reports serving 15,021 people in California, per its EPA record.
Has South Montebello Irrigation Dist. had any water quality violations?
The EPA has 10 violations on file for South Montebello Irrigation Dist., 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.