CALIFORNIA WATER SERVICE CO. - DOMINGUEZ
California — Community Water System — PWSID: CA1910033
System Information
| PWSID | CA1910033 |
| System Name | CALIFORNIA WATER SERVICE CO. - DOMINGUEZ |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | SAN JOSE |
| ZIP Code | 95112 |
| Address | 1720 NORTH FIRST STREET |
| Organization | HENRIE, TARRAH |
| Phone | 408-367-8490 |
Population & Service
| Population Served | 143,996 |
| Service Connections | 33,150 |
Drinking Water Violations (19)
This water system has 19 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | No | — | 0.080 mg/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | No | — | 0.060 mg/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | No | — | 0.060 mg/L | — | Resolved | Mar 31, 2018 | — | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | No | — | 0.080 mg/L | — | Resolved | Mar 31, 2018 | — | |
| Nov 1, 2001 | Nov 30, 2001 | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2001 | — | |
| Nov 1, 2001 | Nov 30, 2001 | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2001 | — | |
| Oct 1, 1995 | Oct 31, 1995 | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | — | |
| Oct 1, 1995 | Oct 31, 1995 | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | — | |
| Sep 1, 1993 | Sep 30, 1993 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 1993 | — | |
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| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.