PURISSIMA HILLS WATER DISTRICT
California — Community Water System — PWSID: CA4310021
System Information
| PWSID | CA4310021 |
| System Name | PURISSIMA HILLS WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | LOS ALTOS HILLS |
| ZIP Code | 94022 |
| Address | 26375 FREMONT ROAD |
| Organization | WALTER, ERIK |
| Phone | 650-948-1217 |
Population & Service
| Population Served | 6,245 |
| Service Connections | 2,146 |
Drinking Water Violations (13)
This water system has 13 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, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 4, 2023 | Lead and Copper Rule |
| Jan 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 4, 2023 | Lead and Copper Rule |
| Nov 1, 1999 | Nov 30, 1999 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 30, 1999 | Total Coliform Rule |
| Nov 1, 1999 | Nov 30, 1999 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 30, 1999 | Total Coliform Rule |
| Nov 1, 1999 | Nov 30, 1999 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 30, 1999 | Total Coliform Rule |
| Aug 1, 1998 | Aug 31, 1998 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Aug 31, 1998 | Surface Water Treatment Rule |
| Aug 1, 1998 | Aug 31, 1998 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Aug 31, 1998 | Surface Water Treatment Rule |
| Mar 1, 1995 | Mar 31, 1995 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1995 | Surface Water Treatment Rule |
| Mar 1, 1995 | Mar 31, 1995 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1995 | Surface Water Treatment Rule |
| Mar 1, 1992 | Mar 31, 1992 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1992 | Surface Water Treatment Rule |
| Mar 1, 1992 | Mar 31, 1992 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1992 | Surface Water Treatment Rule |
| Mar 1, 1992 | Mar 31, 1992 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1992 | Surface Water Treatment Rule |
| Mar 1, 1992 | Mar 31, 1992 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 1992 | Surface Water Treatment 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.