CWSC LOS ALTOS SUBURBAN
California — Community Water System — PWSID: CA4310001
System Information
| PWSID | CA4310001 |
| System Name | CWSC LOS ALTOS SUBURBAN |
| 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 | Nov 17, 2025 |
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 | 69,973 |
| Service Connections | 18,530 |
Drinking Water Violations (4)
This water system has 4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2002 | Dec 31, 2004 | Simazine | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Dec 31, 2004 | Synthetic Organic Chemicals |
| Mar 29, 1995 | Jun 7, 1995 | Nitrate | MR | No | No | — | 10 mg/L | — | Resolved | Jun 7, 1995 | Nitrate Rule |
| Mar 29, 1995 | Jun 7, 1995 | Nitrate | MR | No | No | — | 10 mg/L | — | Resolved | Jun 7, 1995 | Nitrate Rule |
| Nov 1, 1992 | Dec 31, 1992 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 1992 | Total Coliform Rule |
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.