PALOMAR OBSERVATORY
California — Community Water System — PWSID: CA3702236
System Information
| PWSID | CA3702236 |
| System Name | PALOMAR OBSERVATORY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | State |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | PALOMAR MOUNTAIN |
| ZIP Code | 92060 |
| Address | 35899 CANFIELD RD |
| Organization | RODERICK, DREW |
| Phone | 760-742-2100 |
Population & Service
| Population Served | 4,416 |
| Service Connections | 26 |
Drinking Water Violations (20)
This water system has 20 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2022 | Nov 30, 2022 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2022 | Revised Total Coliform Rule |
| Nov 1, 2022 | Nov 30, 2022 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Nov 30, 2022 | Revised Total Coliform Rule |
| Oct 1, 2022 | Oct 31, 2022 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Oct 31, 2022 | Revised Total Coliform Rule |
| Oct 1, 2022 | Oct 31, 2022 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Oct 31, 2022 | Revised Total Coliform Rule |
| Sep 1, 2013 | Sep 30, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2013 | Total Coliform Rule |
| Sep 1, 2013 | Sep 30, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2013 | Total Coliform Rule |
| Feb 1, 2008 | Feb 29, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 29, 2008 | Total Coliform Rule |
| Feb 1, 2008 | Feb 29, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 29, 2008 | Total Coliform Rule |
| Apr 1, 2005 | Apr 30, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2005 | Total Coliform Rule |
| Apr 1, 2005 | Apr 30, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2005 | Total Coliform Rule |
| Sep 1, 1984 | Sep 30, 1984 | Other | No | No | — | — | — | Archived | Sep 30, 1984 | Miscellaneous Other Rules | |
| Jul 1, 1984 | Jul 31, 1984 | Other | No | No | — | — | — | Archived | Jul 31, 1984 | Miscellaneous Other Rules | |
| Jun 1, 1984 | Jun 30, 1984 | Other | No | No | — | — | — | Archived | Jun 30, 1984 | Miscellaneous Other Rules | |
| Apr 1, 1984 | Apr 30, 1984 | Other | No | No | — | — | — | Archived | Apr 30, 1984 | Miscellaneous Other Rules | |
| Dec 1, 1983 | Dec 31, 1983 | Other | No | No | — | — | — | Archived | Dec 31, 1983 | Miscellaneous Other Rules | |
| Sep 1, 1983 | Sep 30, 1983 | Other | No | No | — | — | — | Archived | Sep 30, 1983 | Miscellaneous Other Rules | |
| Aug 1, 1983 | Aug 31, 1983 | Other | No | No | — | — | — | Archived | Aug 31, 1983 | Miscellaneous Other Rules | |
| Jul 1, 1983 | Jul 31, 1983 | Other | No | No | — | — | — | Archived | Jul 31, 1983 | Miscellaneous Other Rules | |
| Oct 1, 1981 | Sep 30, 1982 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Archived | Sep 30, 1982 | Radionuclides and Revised Rad Rule |
| Oct 30, 1980 | Oct 29, 1981 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Archived | Oct 29, 1981 | Radionuclides and Revised Rad Rule |
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.