LA TIERRA HEIGHTS MUTUAL
California - Community Water System - PWSID: CA2800525
System Information
| PWSID | CA2800525 |
| System Name | LA TIERRA HEIGHTS MUTUAL |
| 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 | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | ANGWIN |
| ZIP Code | 94508 |
| Address | PO BOX 295 |
| Organization | COX, KEN |
| Phone | 707-965-2874 |
Population & Service
| Population Served | 67 |
| Service Connections | 19 |
Drinking Water Violations (19)
This water system has 19 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 | - | - | - | Addressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Addressed | - | - | |
| Oct 1, 2022 | Dec 31, 2022 | MON | No | No | - | - | - | Resolved | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MON | No | No | - | - | - | Resolved | Dec 31, 2022 | - | |
| Jul 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Jun 22, 2021 | - | |
| Jul 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Jun 22, 2021 | - | |
| Jul 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Jun 22, 2021 | - | |
| Oct 1, 2019 | - | MR | No | No | - | TT | - | Resolved | Sep 7, 2020 | - | |
| Oct 1, 2019 | - | MR | No | No | - | TT | - | Resolved | Sep 7, 2020 | - | |
| Jan 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Jan 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Feb 1, 2006 | Feb 28, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2006 | - | |
| Feb 1, 2006 | Feb 28, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2006 | - | |
| Jul 1, 1993 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Sep 1, 1984 | Sep 30, 1984 | Other | No | No | - | - | - | Archived | Sep 30, 1984 | - | |
| Oct 1, 1981 | Sep 30, 1982 | MR | No | Yes | - | 15 pCi/L | - | Archived | Sep 30, 1982 | - | |
| Oct 30, 1980 | Oct 29, 1981 | MR | No | Yes | - | 15 pCi/L | - | Archived | Oct 29, 1981 | - |
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.