PONDEROSA BASIN MUTUAL WTR CO
California - Community Water System - PWSID: CA2210002
System Information
| PWSID | CA2210002 |
| System Name | PONDEROSA BASIN MUTUAL WTR CO |
| 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 | MARIPOSA |
| ZIP Code | 95338 |
| Address | 5623 PARKER DRIVE |
| Organization | DONATI, ALEARDO TUFFY |
| Phone | 209-742-6572 |
Population & Service
| Population Served | 798 |
| Service Connections | 317 |
Drinking Water Violations (30)
This water system has 30 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 1, 2024 | - | MR | No | No | - | TT | - | Addressed | - | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2013 | - | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2013 | - | |
| Aug 1, 2007 | Aug 31, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2007 | - | |
| Aug 1, 2007 | Aug 31, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2007 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Aug 1, 2006 | Aug 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2006 | - | |
| Aug 1, 2006 | Aug 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2006 | - | |
| Jun 1, 2006 | Jun 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2006 | - | |
| Jun 1, 2006 | Jun 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2006 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Oct 1, 2004 | Nov 30, 2004 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2004 | - | |
| Oct 1, 2004 | Nov 30, 2004 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2004 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Jan 1, 2001 | Dec 31, 2007 | MR | No | No | - | - | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2001 | Dec 31, 2007 | MR | No | No | - | - | - | Resolved | Dec 31, 2007 | - | |
| Jul 1, 1998 | Jul 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1998 | - | |
| Jul 1, 1998 | Jul 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1998 | - | |
| Jul 1, 1993 | Mar 1, 2000 | MR | No | No | - | TT | - | Resolved | Mar 1, 2000 | - | |
| Jan 1, 1993 | Feb 28, 1993 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 1993 | - | |
| Jan 1, 1993 | Feb 28, 1993 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 1993 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1992 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 1992 | - | |
| - | - | - | 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.