PLYMOUTH, CITY OF
California - Community Water System - PWSID: CA0310004
System Information
| PWSID | CA0310004 |
| System Name | PLYMOUTH, 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 | PLYMOUTH |
| ZIP Code | 95669 |
| Address | P. O. Box 429 |
| Organization | ROBERTS, MARGARET |
| Phone | 209-245-6941 |
Population & Service
| Population Served | 1,060 |
| Service Connections | 535 |
Drinking Water Violations (51)
This water system has 51 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 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2021 | - | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2021 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MON | No | No | - | - | - | Resolved | Aug 31, 2017 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MON | No | No | - | - | - | Resolved | Aug 31, 2017 | - | |
| Jun 1, 2017 | Jun 30, 2017 | MON | No | No | - | - | - | Resolved | Jun 30, 2017 | - | |
| Jun 1, 2017 | Jun 30, 2017 | MON | No | No | - | - | - | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2017 | - | |
| Dec 1, 2016 | Dec 31, 2016 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2016 | - | |
| Dec 1, 2016 | Dec 31, 2016 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2016 | - | |
| Apr 1, 2016 | Apr 30, 2016 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2016 | - | |
| Apr 1, 2016 | Apr 30, 2016 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2016 | - | |
| Jan 1, 2005 | Jan 31, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jan 31, 2005 | - | |
| Jan 1, 2005 | Jan 31, 2005 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jan 31, 2005 | - | |
| Jan 1, 2005 | Jan 31, 2005 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jan 31, 2005 | - | |
| Jan 1, 2005 | Jan 31, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jan 31, 2005 | - | |
| Jul 1, 2001 | - | Other | No | No | - | - | - | Resolved | Nov 20, 2001 | - | |
| Jul 1, 2001 | - | Other | No | No | - | - | - | Resolved | Nov 20, 2001 | - | |
| Jan 26, 2000 | Jan 25, 2001 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 2001 | - | |
| Jan 26, 2000 | Jan 25, 2001 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 2001 | - | |
| Jan 25, 2000 | Jan 24, 2001 | MR | No | Yes | - | - | - | Resolved | Jan 24, 2001 | - | |
| Jan 25, 2000 | Jan 24, 2001 | MR | No | Yes | - | - | - | Resolved | Jan 24, 2001 | - | |
| Jan 25, 2000 | Jan 24, 2001 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 2001 | - | |
| Jan 25, 2000 | Jan 24, 2001 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 2001 | - | |
| Jan 26, 1999 | Jan 25, 2000 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 2000 | - | |
| Jan 26, 1999 | Jan 25, 2000 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 2000 | - | |
| Jan 25, 1999 | Jan 24, 2000 | MR | No | Yes | - | - | - | Resolved | Jan 24, 2000 | - | |
| Jan 25, 1999 | Jan 24, 2000 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 2000 | - | |
| Jan 25, 1999 | Jan 24, 2000 | MR | No | Yes | - | - | - | Resolved | Jan 24, 2000 | - | |
| Jan 25, 1999 | Jan 24, 2000 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 2000 | - | |
| Jan 26, 1998 | Jan 25, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 1999 | - | |
| Jan 26, 1998 | Jan 25, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 1999 | - | |
| Jan 25, 1998 | Jan 24, 1999 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 1999 | - | |
| Jan 25, 1998 | Jan 24, 1999 | MR | No | Yes | - | - | - | Resolved | Jan 24, 1999 | - | |
| Jan 25, 1998 | Jan 24, 1999 | MR | No | Yes | - | - | - | Resolved | Jan 24, 1999 | - | |
| Jan 25, 1998 | Jan 24, 1999 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 1999 | - | |
| Feb 1, 1997 | Feb 28, 1997 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1997 | - | |
| Jan 26, 1997 | Jan 25, 1998 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 1998 | - | |
| Jan 26, 1997 | Jan 25, 1998 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jan 25, 1998 | - | |
| Jan 25, 1997 | Jan 24, 1998 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 1998 | - | |
| Jan 25, 1997 | Jan 24, 1998 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jan 24, 1998 | - | |
| Jan 25, 1997 | Jan 24, 1998 | MR | No | Yes | - | - | - | Resolved | Jan 24, 1998 | - | |
| Jan 25, 1997 | Jan 24, 1998 | MR | No | Yes | - | - | - | Resolved | Jan 24, 1998 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1994 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1994 | - | |
| Jul 1, 1993 | Jul 31, 1993 | TT | Yes | No | - | - | - | Resolved | Jul 31, 1993 | - | |
| Jul 1, 1993 | Mar 1, 2000 | MR | No | No | - | TT | - | Resolved | Mar 1, 2000 | - | |
| - | - | - | 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.