MONTARA WATER AND SANITARY DISTRICT
California — Community Water System — PWSID: CA4110010
System Information
| PWSID | CA4110010 |
| System Name | MONTARA WATER AND SANITARY DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | MONTARA |
| ZIP Code | 94037 |
| Address | P.O. BOX 370131 |
| Organization | HELDMAIER, CLEMENS |
| Phone | 650-728-3358 |
Population & Service
| Population Served | 6,078 |
| Service Connections | 1,698 |
Drinking Water Violations (8)
This water system has 8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jun 1, 2010 | Jun 30, 2010 | Nitrate | MCL | Yes | No | 48 MG/L | 10 mg/L | 45 | Resolved | Jun 30, 2010 | Nitrate Rule |
| Jun 1, 2010 | Jun 30, 2010 | Nitrate | MCL | Yes | No | 48 MG/L | 10 mg/L | 45 | Resolved | Jun 30, 2010 | Nitrate Rule |
| Dec 31, 1996 | Dec 1, 1997 | CYANIDE | MCL | Yes | No | 4.4 MG/L | 0.2 mg/L | .2 | Resolved | Dec 1, 1997 | Inorganic Chemicals |
| Dec 31, 1996 | Dec 1, 1997 | CYANIDE | MCL | Yes | No | 4.4 MG/L | 0.2 mg/L | .2 | Resolved | Dec 1, 1997 | Inorganic Chemicals |
| Dec 31, 1996 | Dec 1, 1997 | Nitrate | MR | No | No | — | 10 mg/L | — | Resolved | Dec 1, 1997 | Nitrate Rule |
| Dec 31, 1996 | Dec 1, 1997 | Nitrate | MR | No | No | — | 10 mg/L | — | Resolved | Dec 1, 1997 | Nitrate Rule |
| Feb 1, 1996 | Feb 29, 1996 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 25, 1996 | Total Coliform Rule |
| — | — | — | 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.