What was found in San Lucas's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 270550 µg/L 2706% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Nitrate | 27120 µg/L 271% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2019 | 1/1 | SYR4 |
| Fluoride | 290 µg/L 7.2% of the EPA limit 4000 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Nitrite | 200 µg/L 20% of the EPA limit 1000 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Barium | 104 µg/L 5.2% of the EPA limit 2000 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Combined Uranium | 43.9624 µg/L 147% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2019 | 1/1 | SYR4 |
| TTHM | 27.34 µg/L 34% of the EPA limit 80 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Bromoform | 22.75 µg/L No EPA limit set Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Arsenic | 9.7 µg/L 97% of the EPA limit 10 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Dibromoacetic Acid | 7.3 µg/L No EPA limit set Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.3 µg/L 12% of the EPA limit 60 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Chromium | 6 µg/L 6% of the EPA limit 100 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Selenium | 5.9 µg/L 12% of the EPA limit 50 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Dibromochloromethane | 4.59 µg/L No EPA limit set Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Cadmium | 2.2 µg/L 44% of the EPA limit 5 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Carbon Tetrachloride | 0.6900 µg/L 14% of the EPA limit 5 µg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2017 | 1/1 | SYR4 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: SAN LUCAS COUNTY WATER DISTRICT · 315 people · 2025 | 1/1 | LCR |
Water suppliers serving San Lucas
| Supplier | Population served |
|---|---|
| SAN LUCAS COUNTY WATER DISTRICT | 315 |
Frequently asked questions about San Lucas tap water
Is San Lucas tap water safe to drink?
EPA testing detected 17 contaminants in the water serving San Lucas. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve San Lucas?
1 public water supplier report drinking-water monitoring for San Lucas, California to the EPA. Each is listed above with its population served.
What contaminants are in San Lucas's water?
The contaminants EPA monitoring detected in San Lucas include Nitrate-Nitrite, Nitrate, Fluoride, Nitrite, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
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.