STOCKTON, CA · San Joaquin County
CITY OF STOCKTON Water System
Consumer Confidence Report status
CITY OF STOCKTON must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for CITY OF STOCKTON.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA3910012
- System type
- Community Water System
- Population served
- 191,302
- Service connections
- 51,522
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
CITY OF STOCKTON is one of 92 community water systems in California in the more than 100,000 people size category, serving 191,302 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 2021 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Stage 2 Disinfectants and Disinfection Byproducts Rule and the Lead and Copper Rule.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTTHM
January 1, 2023 – March 31, 2023
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2021 – January 10, 2025
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2023 – March 31, 2023 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| October 1, 2021 – January 10, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- January 10, 2025State Compliance achieved10 linked violations
- November 20, 2001State Compliance achieved2 linked violations
- November 20, 2001State Compliance achieved2 linked violations
Common questions
Is CITY OF STOCKTON required to publish a Consumer Confidence Report?
- Yes. CITY OF STOCKTON is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CITY OF STOCKTON’s next Consumer Confidence Report due?
- CITY OF STOCKTON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CITY OF STOCKTON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CITY OF STOCKTON.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
LYTLE, MEL
209-937-8438
STOCKTON, CA 95206