ST. HELENA, CITY OF
California — Community Water System — PWSID: CA2810004
System Information
| PWSID | CA2810004 |
| System Name | ST. HELENA, CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water |
| 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 | ST. HELENA |
| ZIP Code | 94574 |
| Address | 1088 COLLEGE AVENUE |
| Organization | LEACH, JOSEPH |
| Phone | 707-968-2629 |
Population & Service
| Population Served | 5,386 |
| Service Connections | 2,551 |
Drinking Water Violations (23)
This water system has 23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 84.87 UG/L | 0.060 mg/L | 60 | Archived | Sep 30, 2023 | — | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 79.32 UG/L | 0.060 mg/L | 60 | Archived | Jun 30, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 81 UG/L | 0.060 mg/L | 60 | Archived | Mar 31, 2023 | — | |
| Oct 1, 2022 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .064 MG/L | 0.060 mg/L | .06 | Archived | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Archived | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | 87.1 UG/L | 0.060 mg/L | 60 | Archived | Mar 31, 2021 | — | |
| Nov 1, 2020 | Nov 30, 2020 | TT | Yes | No | — | — | — | Resolved | Nov 30, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | TT | Yes | No | — | — | — | Resolved | Nov 30, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .065 MG/L | 0.060 mg/L | .06 | Archived | Dec 31, 2020 | — | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2017 | — | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2017 | — | |
| Oct 1, 2016 | Dec 31, 2016 | MCL | Yes | No | .069 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2016 | — | |
| Oct 1, 2016 | Dec 31, 2016 | MCL | Yes | No | .069 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2016 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2016 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2016 | — | |
| Feb 1, 1995 | Feb 28, 1995 | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 27, 1995 | — | |
| Feb 1, 1995 | Feb 28, 1995 | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 27, 1995 | — | |
| Jun 1, 1993 | Jun 30, 1993 | TT | Yes | No | — | — | — | Resolved | Mar 29, 1993 | — | |
| Jun 1, 1993 | Jun 30, 1993 | TT | Yes | No | — | — | — | Resolved | Mar 29, 1993 | — | |
| — | — | — | 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.