CITY OF PALO ALTO
California — Community Water System — PWSID: CA4310009
System Information
| PWSID | CA4310009 |
| System Name | CITY OF PALO ALTO |
| 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 | Nov 17, 2025 |
Location & Contact
| State | California |
| City | PALO ALTO |
| ZIP Code | 94303 |
| Address | P.O. Box 10250 |
| Organization | ZUCCA, MATT |
| Phone | 650-329-2639 |
Population & Service
| Population Served | 67,231 |
| Service Connections | 19,949 |
Drinking Water Violations (12)
This water system has 12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar 1, 2015 | Mar 31, 2015 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2015 | Surface Water Treatment Rule |
| Mar 1, 2015 | Mar 31, 2015 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2015 | Surface Water Treatment Rule |
| May 1, 2012 | May 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2012 | Total Coliform Rule |
| Jul 1, 2010 | Jul 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2010 | Total Coliform Rule |
| Jul 1, 2010 | Jul 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2010 | Total Coliform 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 |
| 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.