CITY OF CUPERTINO
California — Community Water System — PWSID: CA4310018
System Information
| PWSID | CA4310018 |
| System Name | CITY OF CUPERTINO |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| 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 | 95128 |
| Address | 1221A South Bascom Avenue |
| Organization | DELORENZO, SUZANNE |
| Phone | 408-918-7254 |
Population & Service
| Population Served | 16,336 |
| Service Connections | 4,692 |
Drinking Water Violations (15)
This water system has 15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 22, 1993 | Mar 31, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Mar 31, 1993 | — | |
| Feb 22, 1993 | Mar 31, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Mar 31, 1993 | — | |
| Feb 22, 1993 | Mar 31, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Mar 31, 1993 | — | |
| Feb 22, 1993 | Mar 31, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Mar 31, 1993 | — | |
| Nov 24, 1992 | Jan 22, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Jan 22, 1993 | — | |
| Nov 24, 1992 | Jan 22, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Jan 22, 1993 | — | |
| Nov 24, 1992 | Jan 22, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Jan 22, 1993 | — | |
| Nov 24, 1992 | Jan 22, 1993 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Jan 22, 1993 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — | |
| Sep 1, 1992 | Nov 24, 1992 | MCL | Yes | No | .11 MG/L | 0.080 mg/L | .1 | Resolved | Nov 24, 1992 | — |
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.