CITY OF TUSTIN
California — Community Water System — PWSID: CA3010046
System Information
| PWSID | CA3010046 |
| System Name | CITY OF TUSTIN |
| 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 | TUSTIN |
| ZIP Code | 92780 |
| Address | 300 Centennial Way |
| Organization | GRISSO, MICHAEL |
| Phone | 714-361-4719 |
Population & Service
| Population Served | 66,600 |
| Service Connections | 14,150 |
Drinking Water Violations (12)
This water system has 12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2018 | Jun 30, 2018 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 21, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2018 | Jun 30, 2018 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 21, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2018 | Jun 30, 2018 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 21, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2018 | Jun 30, 2018 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 21, 2018 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 29, 2016 | — | E. COLI | MR | No | No | — | — | — | Resolved | Aug 16, 2016 | Ground Water Rule |
| Jul 29, 2016 | — | E. COLI | MR | No | No | — | — | — | Resolved | Aug 16, 2016 | Ground Water Rule |
| Nov 1, 2006 | Nov 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2006 | Total Coliform Rule |
| Nov 1, 2006 | Nov 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2006 | Total Coliform Rule |
| Aug 15, 1998 | Sep 16, 1998 | Nitrate | MCL | Yes | No | 54.7 MG/L | 10 mg/L | 45 | Resolved | Sep 16, 1998 | Nitrate Rule |
| Aug 15, 1998 | Sep 16, 1998 | Nitrate | MCL | Yes | No | 54.7 MG/L | 10 mg/L | 45 | Resolved | Sep 16, 1998 | Nitrate Rule |
| Oct 1, 1982 | Oct 31, 1982 | Nitrate | MCL | Yes | No | — | 10 mg/L | — | Archived | Oct 31, 1982 | Nitrate Rule |
| Oct 30, 1979 | Jan 29, 1980 | Nitrate | MCL | Yes | No | — | 10 mg/L | — | Archived | Jan 29, 1980 | Nitrate 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.