HIGHLANDS MUTUAL WATER COMPANY
California — Community Water System — PWSID: CA1710003
System Information
| PWSID | CA1710003 |
| System Name | HIGHLANDS MUTUAL WATER COMPANY |
| System Type | Community Water System |
| Water Source | Surface 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 | CLEARLAKE |
| ZIP Code | 95422 |
| Address | 14774 Hillcrest Avenue |
| Organization | SISCO, RICHARD |
| Phone | 707-994-8676 |
Population & Service
| Population Served | 7,772 |
| Service Connections | 2,355 |
Drinking Water Violations (23)
This water system has 23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2021 | Jun 30, 2021 | MCL | Yes | No | 61.125 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MCL | Yes | No | 61.125 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .064 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .064 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2021 | — | |
| Oct 1, 2019 | — | MR | No | No | — | TT | — | Resolved | Jan 22, 2020 | — | |
| Oct 1, 2019 | — | MR | No | No | — | TT | — | Resolved | Jan 22, 2020 | — | |
| Oct 1, 2019 | — | MR | No | No | — | TT | — | Resolved | Jan 22, 2020 | — | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | 61.4 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | 61.4 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | 61 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2019 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | 61 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2019 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | 81.7 UG/L | 0.080 mg/L | 80 | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | 81.7 UG/L | 0.080 mg/L | 80 | Resolved | Dec 31, 2015 | — | |
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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.