SANTA MARGARITA WATER DISTRICT-ID9
California — Community Water System — PWSID: CA3010030
System Information
| PWSID | CA3010030 |
| System Name | SANTA MARGARITA WATER DISTRICT-ID9 |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| 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 | RANCHO SANTA MARGARITA |
| ZIP Code | 92688 |
| Address | 26111 Antonio Pkwy. |
| Organization | PETERSON, DANIEL |
| Phone | 949-459-6594 |
Population & Service
| Population Served | 39,684 |
| Service Connections | 11,013 |
Drinking Water Violations (22)
This water system has 22 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 1, 2022 | Dec 31, 2022 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Dec 31, 2022 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 21, 2021 | Lead and Copper Rule |
| Oct 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 21, 2021 | Lead and Copper Rule |
| Jan 1, 2013 | Mar 31, 2013 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2013 | Mar 31, 2013 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2013 | Mar 31, 2013 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2013 | Mar 31, 2013 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2012 | Dec 31, 2012 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2012 | Dec 31, 2012 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2012 | Dec 31, 2012 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2012 | Dec 31, 2012 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | Sep 30, 2012 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | Sep 30, 2012 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | Sep 30, 2012 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | Sep 30, 2012 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2012 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2011 | Dec 31, 2011 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2011 | Nitrate Rule |
| Jan 1, 2011 | Dec 31, 2011 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2011 | Nitrate Rule |
| Jan 1, 2011 | Dec 31, 2011 | Xylenes, Total | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2011 | Volatile Organic Chemicals |
| Jan 1, 2011 | Dec 31, 2011 | Xylenes, Total | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2011 | Volatile Organic Chemicals |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | 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.