HILMAR COUNTY WATER DISTRICT
California — Community Water System — PWSID: CA2410012
System Information
| PWSID | CA2410012 |
| System Name | HILMAR COUNTY WATER DISTRICT |
| System Type | Community Water System |
| 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 | HILMAR |
| ZIP Code | 95324 |
| Address | P.O. Box 1060 |
| Organization | JORRITSMA, CURTIS |
| Phone | 209-632-3522 |
Population & Service
| Population Served | 5,504 |
| Service Connections | 1,684 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2025 | Nov 30, 2025 | MCL | Yes | No | 13.2 MG/L | 10 mg/L | 10 | Archived | Nov 30, 2025 | — | |
| Oct 1, 2025 | Oct 31, 2025 | MCL | Yes | No | 28 MG/L | 10 mg/L | 10 | Archived | Oct 31, 2025 | — | |
| Jul 1, 2025 | Jul 31, 2025 | MCL | Yes | No | 18.2 MG/L | 10 mg/L | 10 | Archived | Jul 31, 2025 | — | |
| Mar 1, 2025 | Mar 31, 2025 | MCL | Yes | No | 11.3 MG/L | 10 mg/L | 10 | Archived | Mar 31, 2025 | — | |
| Feb 1, 2025 | Feb 28, 2025 | MCL | Yes | No | 11.5 MG/L | 10 mg/L | 10 | Archived | Feb 28, 2025 | — | |
| Jan 1, 2025 | Jan 31, 2025 | MCL | Yes | No | 10.6 MG/L | 10 mg/L | 10 | Archived | Jan 31, 2025 | — | |
| Dec 1, 2024 | Dec 31, 2024 | MCL | Yes | No | 16.2 MG/L | 10 mg/L | 10 | Archived | Dec 31, 2024 | — | |
| Jul 1, 2024 | Jul 31, 2024 | MCL | Yes | No | 11.7 MG/L | 10 mg/L | 10 | Archived | Jul 31, 2024 | — | |
| May 1, 2024 | May 31, 2024 | MCL | Yes | No | 11.6 MG/L | 10 mg/L | 10 | Archived | May 31, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | MCL | Yes | No | 31 MG/L | 10 mg/L | 10 | Archived | Apr 30, 2024 | — | |
| Mar 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 11.9 MG/L | 10 mg/L | 10 | Archived | Mar 31, 2024 | — | |
| Feb 1, 2024 | Feb 29, 2024 | MCL | Yes | No | 15.9 MG/L | 10 mg/L | 10 | Archived | Feb 29, 2024 | — | |
| Jan 1, 2024 | Jan 31, 2024 | MCL | Yes | No | 12.2 MG/L | 10 mg/L | 10 | Archived | Jan 31, 2024 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 14.7 MG/L | 10 mg/L | 10 | Archived | Dec 31, 2023 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2019 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2019 | — | |
| Jul 1, 1983 | Jul 31, 1983 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jul 31, 1983 | — | |
| Aug 1, 1982 | Sep 30, 1982 | MCL | Yes | No | 60 | 10 mg/L | — | Archived | Sep 30, 1982 | — | |
| Jan 1, 1981 | Jan 31, 1981 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jan 31, 1981 | — | |
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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.