LOS ALAMOS COMMUNITY SERVICES DISTRICT
California — Community Water System — PWSID: CA4210002
System Information
| PWSID | CA4210002 |
| System Name | LOS ALAMOS COMMUNITY SERVICES DISTRICT |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 31, 1980 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | LOS ALAMOS |
| ZIP Code | 93440 |
| Address | PO Box 675 |
| Organization | GOMEZ, JUAN RAMON |
| Phone | 805-344-4195 |
Population & Service
| Population Served | 1,534 |
| Service Connections | 615 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2018 | Dec 31, 2018 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2018 | Dec 31, 2018 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2018 | Dec 31, 2018 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2018 | Dec 31, 2018 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 1997 | May 31, 1997 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 1997 | Total Coliform Rule |
| May 1, 1997 | May 31, 1997 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 1997 | Total Coliform Rule |
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.