CALIFORNIA WATER SERVICE-S SAN FRANCISCO
California - Community Water System - PWSID: CA4110009
System Information
| PWSID | CA4110009 |
| System Name | CALIFORNIA WATER SERVICE-S SAN FRANCISCO |
| 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 | JAMES, SOPHIE |
| Phone | 408-367-8593 |
Population & Service
| Population Served | 64,146 |
| Service Connections | 16,449 |
Drinking Water Violations (8)
This water system has 8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jun 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Aug 19, 2013 | - | |
| Jun 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Aug 19, 2013 | - | |
| Jun 1, 1993 | Jun 30, 1993 | TT | Yes | No | - | - | - | Resolved | Jun 30, 1993 | - | |
| Jun 1, 1993 | Jun 30, 1993 | TT | Yes | No | - | - | - | Resolved | Jun 30, 1993 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1992 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | 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.