Mitomkai Tribal Water System
California - Community Water System - PWSID: 090605120
System Information
| PWSID | 090605120 |
| System Name | Mitomkai Tribal Water System |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Nov 30, 2009 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | California |
| City | Willits |
| ZIP Code | 95490 |
| Address | 190 Sherwood Hill Drive |
| Organization | Sherwood Valley Rancheria |
| Phone | 7074599690 |
Population & Service
| Population Served | 300 |
| Service Connections | 21 |
Drinking Water Violations (55)
This water system has 55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1, 2025 | - | MR | No | Yes | - | - | - | Unaddressed | - | - | |
| Aug 1, 2025 | - | RPT | No | No | - | - | - | Resolved | Sep 25, 2025 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2015 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2014 | - | |
| Sep 1, 2014 | Sep 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Sep 30, 2014 | - | |
| Mar 1, 2014 | Mar 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Dec 8, 2014 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.0005 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.4 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.5 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.0004 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2013 | - | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 2013 | - | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2013 | - |
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.