DEL ORO WATER CO.-WALNUT RANCH
California - Community Water System - PWSID: CA0600011
System Information
| PWSID | CA0600011 |
| System Name | DEL ORO WATER CO.-WALNUT RANCH |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Non-Inventory |
| 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 | CHICO |
| ZIP Code | 95927 |
| Address | DRAWER 5172 |
| Organization | FORTINO, ROBERT |
| Phone | 530-809-3970 |
Population & Service
| Population Served | 182 |
| Service Connections | 78 |
Drinking Water Violations (11)
This water system has 11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | .013 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2011 | - | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | .013 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2011 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | .014 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | .014 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2010 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2010 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2010 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Dec 1, 1982 | Dec 31, 1982 | Other | No | No | - | - | - | Archived | Dec 31, 1982 | - | |
| Oct 1, 1981 | Sep 30, 1982 | MR | No | Yes | - | 15 pCi/L | - | Archived | Sep 30, 1982 | - | |
| Oct 30, 1980 | Oct 29, 1981 | MR | No | Yes | - | 15 pCi/L | - | Archived | Oct 29, 1981 | - |
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.