TRIUNFO WATER & SANITATION DISTRICT
California — Community Water System — PWSID: CA5610043
System Information
| PWSID | CA5610043 |
| System Name | TRIUNFO WATER & SANITATION DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | WESTLAKE VILLAGE |
| ZIP Code | 91362 |
| Address | 370 N. Westlake Boulevard, Suite 100 |
| Organization | RYDMAN, DAVE |
| Phone | 805-658-4643 |
Population & Service
| Population Served | 13,898 |
| Service Connections | 4,603 |
Drinking Water Violations (9)
This water system has 9 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, 2004 | Jul 31, 2004 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2004 | Total Coliform Rule |
| Jul 1, 2004 | Jul 31, 2004 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2004 | Total Coliform Rule |
| May 1, 2002 | May 31, 2002 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2002 | Total Coliform Rule |
| May 1, 2002 | May 31, 2002 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2002 | Total Coliform Rule |
| Oct 1, 2000 | Oct 31, 2000 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2000 | Total Coliform Rule |
| Oct 1, 2000 | Oct 31, 2000 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2000 | Total Coliform Rule |
| Jul 1, 1998 | Jul 31, 1998 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Mar 19, 1993 | Total Coliform Rule |
| Jul 1, 1998 | Jul 31, 1998 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Mar 19, 1993 | Total Coliform Rule |
| Jan 1, 1993 | Jan 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 1993 | 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.