OAK PARK WS
California - Transient Non-Community - PWSID: CA2700999
System Information
| PWSID | CA2700999 |
| System Name | OAK PARK WS |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| 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 | GREENFIELD |
| ZIP Code | 93927 |
| Address | PO Box 432 |
| Organization | THORP, JANET |
| Phone | 831-855-8873 |
Population & Service
| Population Served | 53 |
| Service Connections | 1 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2013 | Jun 30, 2013 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 2013 | - | |
| Apr 1, 2013 | Jun 30, 2013 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 2013 | - | |
| Jul 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jul 1, 2008 | Sep 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2008 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2007 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2007 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2007 | - | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2006 | - | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2006 | - | |
| Apr 1, 2006 | Apr 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2006 | - | |
| Apr 1, 2006 | Apr 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2006 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Jan 1, 2004 | Jan 31, 2004 | MCL | Yes | No | 54 MG/L | 10 mg/L | 45 | Resolved | Jan 31, 2004 | - | |
| Jan 1, 2004 | Jan 31, 2004 | MCL | Yes | No | 54 MG/L | 10 mg/L | 45 | Resolved | Jan 31, 2004 | - | |
| Jul 1, 2003 | Sep 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2003 | - | |
| Jul 1, 2003 | Sep 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2003 | - | |
| Jan 1, 2003 | Mar 31, 2003 | MCL | Yes | No | 58 MG/L | 10 mg/L | 45 | Resolved | Mar 31, 2003 | - | |
| Jan 1, 2003 | Mar 31, 2003 | MCL | Yes | No | 58 MG/L | 10 mg/L | 45 | Resolved | Mar 31, 2003 | - | |
| Jan 1, 2003 | Mar 31, 2003 | MCL | Yes | No | 58 MG/L | 10 mg/L | 45 | Resolved | Mar 31, 2003 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - |
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.