MAPACHE TRAILER PARK
California - Community Water System - PWSID: CA3900661
System Information
| PWSID | CA3900661 |
| System Name | MAPACHE TRAILER PARK |
| 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 | CONCORD |
| ZIP Code | 94520 |
| Address | 1310 Monument Blvd |
| Organization | DENHOY, NITA |
| Phone | 415-309-6482 |
Population & Service
| Population Served | 275 |
| Service Connections | 99 |
Drinking Water Violations (18)
This water system has 18 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 1, 2016 | - | Other | No | No | - | - | - | Resolved | Jul 18, 2016 | - | |
| Jul 1, 2016 | - | Other | No | No | - | - | - | Resolved | Jul 18, 2016 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Mar 1, 2010 | Mar 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2010 | - | |
| Mar 1, 2010 | Mar 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2010 | - | |
| Jul 1, 2009 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2010 | - | |
| Jul 1, 2008 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2009 | - | |
| Oct 1, 2006 | Oct 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2006 | - | |
| Oct 1, 2006 | Oct 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2006 | - | |
| Oct 1, 2006 | Oct 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2006 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2006 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2006 | - | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2003 | - | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2003 | - | |
| Jul 1, 1993 | Apr 4, 2000 | MR | No | No | - | TT | - | Resolved | Apr 4, 2000 | - | |
| Oct 10, 1989 | Oct 9, 1990 | MCL | Yes | No | - | 0.010 mg/L | - | Archived | Oct 9, 1990 | - | |
| 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.