OKU INCORPORATED
PWS ID: CA4100540 · PESCADERO, California 94060
Population Served
35
Total Violations
94
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 10
- County
- San Mateo
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 78
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Radium-228 | MR | 6 | 2021 |
| Interim Enhanced Surface Water Treatment Rule | TT | 3 | 2010 |
| Lead and Copper Rule | MR | 3 | 2003 |
| TTHM | MCL | 2 | 2011 |
| Coliform (TCR) | MR | 2 | 2006 |
| Surface Water Treatment Rule | TT | 2 | 1996 |
| Arsenic | MR | 2 | 2019 |
| Barium | MR | 2 | 2019 |
| Chromium | MR | 2 | 2019 |
| Mercury | MR | 2 | 2019 |
| Nickel | MR | 2 | 2019 |
| Thallium, Total | MR | 2 | 2019 |
| cis-1,2-Dichloroethylene | MR | 2 | 2019 |
| Xylenes, Total | MR | 2 | 2019 |
| DICHLOROMETHANE | MR | 2 | 2019 |
| o-Dichlorobenzene | MR | 2 | 2019 |
| p-Dichlorobenzene | MR | 2 | 2019 |
| Vinyl chloride | MR | 2 | 2019 |
| trans-1,2-Dichloroethylene | MR | 2 | 2019 |
| 1,2-Dichloroethane | MR | 2 | 2019 |
| 1,1,1-Trichloroethane | MR | 2 | 2019 |
| Carbon tetrachloride | MR | 2 | 2019 |
| 1,2-Dichloropropane | MR | 2 | 2019 |
| Trichloroethylene | MR | 2 | 2019 |
| Toluene | MR | 2 | 2019 |
| Ethylbenzene | MR | 2 | 2019 |
| Styrene | MR | 2 | 2019 |
| Cadmium | MR | 2 | 2019 |
| Benzene | MR | 2 | 2019 |
| Antimony, Total | MR | 2 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.