DUNHAM SCHOOL
California - Non-Transient Non-Community - PWSID: CA4900739
System Information
| PWSID | CA4900739 |
| System Name | DUNHAM SCHOOL |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Jun 22, 2026 |
Location & Contact
| State | California |
| City | PETALUMA |
| ZIP Code | 94952 |
| Address | 4111 Roblar Road |
| Organization | LARSON, ANI |
| Phone | 707-795-5050 |
Population & Service
| Population Served | 175 |
| Service Connections | 3 |
Drinking Water Violations (20)
This water system has 20 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Apr 1, 2007 | Apr 30, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2007 | - | |
| Apr 1, 2007 | Apr 30, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2007 | - | |
| Mar 1, 2007 | Mar 31, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2007 | - | |
| Mar 1, 2007 | Mar 31, 2007 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 2007 | - | |
| Jan 1, 2007 | Jan 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2007 | - | |
| Jan 1, 2007 | Jan 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2007 | - | |
| Feb 1, 2003 | Feb 28, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 2003 | - | |
| Feb 1, 2003 | Feb 28, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 2003 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 1999 | - | |
| Feb 1, 1995 | Feb 28, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1995 | - | |
| Feb 1, 1995 | Feb 28, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 1995 | - | |
| Aug 1, 1984 | Aug 31, 1984 | Other | No | No | - | - | - | Archived | Aug 31, 1984 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.