HOLLISTER, CITY OF
California — Community Water System — PWSID: CA3510001
System Information
| PWSID | CA3510001 |
| System Name | HOLLISTER, CITY OF |
| 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 | HOLLISTER |
| ZIP Code | 95023 |
| Address | 1321 South St. |
| Organization | HERNANDEZ, JAVIER |
| Phone | 831-636-4370 |
Population & Service
| Population Served | 26,017 |
| Service Connections | 7,884 |
Drinking Water Violations (35)
This water system has 35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2024 | Jun 30, 2024 | MR | No | No | — | 0.080 mg/L | — | Archived | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MR | No | No | — | 0.060 mg/L | — | Archived | Jun 30, 2024 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2022 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2022 | — | |
| Oct 1, 2018 | Dec 31, 2018 | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2018 | — | |
| Oct 1, 2018 | Dec 31, 2018 | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2018 | — | |
| Jul 1, 2018 | Sep 30, 2018 | MCL | Yes | No | .092 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2018 | — | |
| Jul 1, 2018 | Sep 30, 2018 | MCL | Yes | No | .092 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2018 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Oct 1, 2015 | Oct 31, 2015 | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2015 | — | |
| Oct 1, 2015 | Oct 31, 2015 | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2015 | — | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2010 | — | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | No | — | 30 ug/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | No | — | 30 ug/L | — | Resolved | Dec 31, 2004 | — | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2000 | — | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2000 | — | |
| Jan 1, 1999 | Jan 1, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2001 | — | |
| Jan 1, 1999 | Jan 1, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2001 | — | |
| Jan 1, 1999 | Jan 1, 2001 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jan 1, 2001 | — | |
| Jan 1, 1999 | Mar 31, 1999 | MCL | Yes | No | 48 MG/L | 10 mg/L | 45 | Resolved | Mar 31, 1999 | — | |
| Jan 1, 1999 | Mar 31, 1999 | MCL | Yes | No | 48 MG/L | 10 mg/L | 45 | Resolved | Mar 31, 1999 | — | |
| Jan 1, 1999 | Jan 1, 2001 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jan 1, 2001 | — | |
| Jul 31, 1998 | Sep 30, 1998 | MR | No | Yes | — | 10 mg/L | — | Resolved | Sep 30, 1998 | — | |
| Jul 31, 1998 | Sep 30, 1998 | MR | No | Yes | — | 10 mg/L | — | Resolved | Sep 30, 1998 | — | |
| Jul 31, 1997 | Sep 30, 1997 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Sep 30, 1997 | — | |
| Jul 31, 1997 | Sep 30, 1997 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Sep 30, 1997 | — | |
| Sep 1, 1987 | Sep 30, 1987 | Other | No | No | — | — | — | Archived | Sep 30, 1987 | — | |
| — | — | — | 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.