WILLIAM HEISE COUNTY PARK
California — Transient Non-Community — PWSID: CA3700072
System Information
| PWSID | CA3700072 |
| System Name | WILLIAM HEISE COUNTY PARK |
| 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 | Nov 17, 2025 |
Location & Contact
| State | California |
| City | SAN DIEGO |
| ZIP Code | 92123 |
| Address | 5510 Overland Avenue |
| Organization | MARES, MARCO |
| Phone | 858-966-1361 |
Population & Service
| Population Served | 850 |
| Service Connections | 58 |
Drinking Water Violations (8)
This water system has 8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 1, 2025 | May 31, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Archived | May 31, 2025 | Revised Total Coliform Rule |
| Feb 1, 2020 | Feb 29, 2020 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Feb 29, 2020 | Revised Total Coliform Rule |
| Oct 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Oct 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Jan 1, 2005 | Mar 31, 2005 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Jan 24, 2005 | Nitrate Rule |
| Jan 1, 2005 | Mar 31, 2005 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Jan 24, 2005 | Nitrate Rule |
| Mar 1, 1984 | Mar 31, 1984 | Other | No | No | — | — | — | Archived | Mar 31, 1984 | Miscellaneous Other Rules | |
| Dec 1, 1983 | Dec 31, 1983 | Other | No | No | — | — | — | Archived | Dec 31, 1983 | Miscellaneous Other Rules |
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.