DOWNTOWN GRATON MUTUAL WATER SYSTEM
California - Community Water System - PWSID: CA4901246
System Information
| PWSID | CA4901246 |
| System Name | DOWNTOWN GRATON MUTUAL WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jun 24, 1999 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | GRATON |
| ZIP Code | 95444 |
| Address | P.O. Box 394 |
| Organization | THIESSEN, ORRIN |
| Phone | 707-823-0292 |
Population & Service
| Population Served | 115 |
| Service Connections | 28 |
Drinking Water Violations (6)
This water system has 6 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, 2008 | Jun 30, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Jun 30, 2008 | - | |
| Apr 1, 2008 | Jun 30, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Jun 30, 2008 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jul 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 24, 1998 | - | |
| Jul 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 24, 1998 | - |
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.