SAN JUSTO MUTUAL WATER COMPANY
California - Community Water System - PWSID: CA3500550
System Information
| PWSID | CA3500550 |
| System Name | SAN JUSTO MUTUAL WATER COMPANY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 5, 1981 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | HOLLISTER |
| ZIP Code | 95023 |
| Address | 155 HILLTOP DRIVE |
| Organization | SCHWEIGER, PAUL |
| Phone | 831-245-8044 |
Population & Service
| Population Served | 160 |
| Service Connections | 61 |
Drinking Water Violations (74)
This water system has 74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 17, 2024 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Dec 29, 2021 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Dec 29, 2021 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Nov 30, 2023 | - | |
| Jan 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Nov 30, 2023 | - | |
| Sep 1, 2007 | - | Other | No | No | - | - | - | Resolved | Dec 6, 2007 | - | |
| Sep 1, 2007 | Sep 30, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2007 | - | |
| Sep 1, 2007 | Sep 30, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2007 | - | |
| Sep 1, 2007 | Sep 30, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2007 | - | |
| Sep 1, 2007 | Sep 30, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2007 | - | |
| Sep 1, 2007 | - | Other | No | No | - | - | - | Resolved | Dec 6, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2007 | - | |
| Jul 1, 2005 | Jul 31, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2005 | - | |
| Jul 1, 2005 | Jul 31, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2005 | - | |
| Mar 1, 2005 | Mar 31, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - | |
| Mar 1, 2005 | Mar 31, 2005 | Other | No | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - | |
| Mar 1, 2005 | Mar 31, 2005 | Other | No | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - | |
| Mar 1, 2005 | Mar 31, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| Jun 1, 2001 | Jun 30, 2001 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2001 | - | |
| May 1, 1999 | May 31, 1999 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1999 | - | |
| Mar 1, 1999 | Mar 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1999 | - | |
| Mar 1, 1999 | Mar 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1999 | - | |
| Mar 1, 1999 | Mar 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1999 | - | |
| Mar 1, 1999 | Mar 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1999 | - | |
| Feb 1, 1999 | Feb 28, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1999 | - | |
| Feb 1, 1999 | Feb 28, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1999 | - | |
| Dec 1, 1998 | Dec 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 1998 | - | |
| Dec 1, 1998 | Dec 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 1998 | - | |
| Dec 1, 1998 | Dec 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 1998 | - | |
| Dec 1, 1998 | Dec 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 1998 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1998 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1998 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 1998 | - | |
| Sep 1, 1998 | Sep 30, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1998 | - | |
| Sep 1, 1998 | Sep 30, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1998 | - |
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.