CITY OF STOCKTON
California — Community Water System — PWSID: CA3910012
System Information
| PWSID | CA3910012 |
| System Name | CITY OF STOCKTON |
| 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 | STOCKTON |
| ZIP Code | 95206 |
| Address | 2500 Navy Dr |
| Organization | LYTLE, MEL |
| Phone | 209-937-8438 |
Population & Service
| Population Served | 191,302 |
| Service Connections | 51,522 |
Drinking Water Violations (20)
This water system has 20 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 17, 2024 | — | LEAD AND COPPER RULE REVISIONS | RPT | No | No | — | — | — | Unaddressed | — | Lead and Copper Rule Revisions |
| Oct 17, 2024 | — | LEAD AND COPPER RULE REVISIONS | TT | Yes | No | — | — | — | Unaddressed | — | Lead and Copper Rule Revisions |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Apr 1, 2023 | Jun 30, 2023 | TTHM | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2023 | Jun 30, 2023 | TTHM | MCL | Yes | No | .083 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2023 | Mar 31, 2023 | TTHM | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2023 | Mar 31, 2023 | TTHM | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Addressed | — | Lead and Copper Rule |
| Mar 1, 2016 | Mar 31, 2016 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2016 | Surface Water Treatment Rule |
| Mar 1, 2016 | Mar 31, 2016 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2016 | Surface Water Treatment Rule |
| Jan 1, 2013 | Mar 31, 2013 | TTHM | MCL | Yes | No | .096 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2013 | Mar 31, 2013 | TTHM | MCL | Yes | No | .096 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2013 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Nov 1, 2005 | Nov 30, 2005 | Coliform (TCR) | Other | No | No | — | 5% of samples | — | Resolved | Nov 30, 2005 | Total Coliform Rule |
| Nov 1, 2005 | Nov 30, 2005 | Coliform (TCR) | Other | No | No | — | 5% of samples | — | Resolved | Nov 30, 2005 | Total Coliform Rule |
| Jul 1, 2001 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 20, 2001 | Consumer Confidence Rule |
| Jul 1, 2001 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 20, 2001 | Consumer Confidence Rule |
| Jul 1, 2001 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 20, 2001 | Consumer Confidence Rule |
| Dec 1, 1999 | Dec 31, 1999 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 1999 | Total Coliform Rule |
| Dec 1, 1999 | Dec 31, 1999 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 1999 | 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.