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 | 2005-02-01 → 2005-02-28 |
| MCL | Health-based | Resolved | 2005-02-01 → 2005-02-28 |
| MCL | Health-based | Resolved | 2005-02-01 → 2005-02-28 |
| MR | Monitoring | Resolved | 2010-12-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2010-12-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 1999-09-01 → 1999-09-30 |
| MR | Monitoring | Resolved | 1999-09-01 → 1999-09-30 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 2712 µg/L 27% of the EPA limit 10000 µg/L
worst single sample: 2938 µg/L | 200/254 | SYR4 | 2012–2019 |
| Fluoride | 664 µg/L 17% of the EPA limit 4000 µg/L
worst single sample: 780 µg/L | 99/113 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 832000 µg/L 8320% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L | 49/64 | SYR4 | 2012–2019 |
| Arsenic | 4.87 µg/L 49% of the EPA limit 10 µg/L
worst single sample: 5.2 µg/L | 27/122 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 23/23 | LCR | 2025 |
| Chromium | 20.45 µg/L 20% of the EPA limit 100 µg/L
worst single sample: 21 µg/L | 12/90 | SYR4 | 2012–2019 |
| TTHM | 3.9 µg/L 4.9% of the EPA limit 80 µg/L
worst single sample: 4.4 µg/L | 11/26 | SYR4 | 2012–2019 |
| Bromoform | 2 µg/L No EPA limit set | 7/26 | SYR4 | 2012–2019 |
| Chloroform | 4.25 µg/L No EPA limit set
worst single sample: 4.4 µg/L | 4/26 | SYR4 | 2012–2019 |
| Copper | 170 µg/L 13% of the EPA limit 1300 µg/L | 1/83 | SYR4 | 2012–2019 |
| Combined Uranium | 3.427 µg/L 11% of the EPA limit 30 µg/L | 1/2 | SYR4 | 2015 |
| Lead | 17 µg/L 113% of the EPA limit, at the 95th percentile of samples — 15 µg/L | 1/80 | SYR4 | 2012–2019 |
| Lithium | 10.2 µg/L No EPA limit set | 1/30 | UCMR-5 | 2025 |
64 contaminants tested, none detected
Utility contact
Frequently asked questions about Hesperia Wd
Is Hesperia Wd tap water safe to drink?
EPA monitoring detected 20 contaminants in Hesperia Wd'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 Hesperia Wd's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Arsenic, Lead, and others. The full list with the level and data source for each is above.
How many people does Hesperia Wd serve?
Hesperia Wd reports serving 100,744 people in California, per its EPA record.
Has Hesperia Wd had any water quality violations?
The EPA has 7 violations on file for Hesperia Wd, of which 3 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.