MOUNT LAGUNA IMPROVEMENT ASSN.
California - Non-Transient Non-Community - PWSID: CA3702283
System Information
| PWSID | CA3702283 |
| System Name | MOUNT LAGUNA IMPROVEMENT ASSN. |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Nov 30, 1981 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | MT LAGUNA |
| ZIP Code | 91948 |
| Address | PO BOX 192 |
| Organization | MOSER, JAY |
| Phone | 619-933-6189 |
Population & Service
| Population Served | 578 |
| Service Connections | 168 |
Drinking Water Violations (17)
This water system has 17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Feb 1, 2019 | Feb 28, 2019 | MON | No | No | - | - | - | Resolved | Feb 28, 2019 | - | |
| Feb 1, 2019 | Feb 28, 2019 | MON | No | No | - | - | - | Resolved | Feb 28, 2019 | - | |
| May 1, 2014 | May 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2014 | - | |
| May 1, 2014 | May 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2014 | - | |
| Aug 28, 2011 | - | MR | No | No | - | TT | - | Resolved | Jan 21, 2014 | - | |
| Aug 28, 2011 | - | MR | No | No | - | TT | - | Resolved | Jan 21, 2014 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2009 | - | |
| Jun 30, 2007 | - | MR | No | No | - | TT | - | Addressed | - | - | |
| Oct 1, 2005 | Dec 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2005 | - |
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.