STOCKTON, CA · San Joaquin County
SAN JOAQUIN COUNTY - THORNTON Water System
Consumer Confidence Report status
SAN JOAQUIN COUNTY - THORNTON 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 SAN JOAQUIN COUNTY - THORNTON.
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)
- CA3910009
- System type
- Community Water System
- Population served
- 964
- Service connections
- 292
- Ownership
- local government
- Water source
- groundwater (wells)
SAN JOAQUIN COUNTY - THORNTON is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 964 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 2004 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.
All 2 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 Total Coliform Rules.
Violation history
Monitoring, Repeat Minor (TCR)
—Coliform (TCR)
July 1, 2009 – July 31, 2009
ResolvedMonitoring, Repeat Minor (TCR)
—Coliform (TCR)
January 1, 2004 – January 15, 2004
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2009 – July 31, 2009 | Monitoring, Repeat Minor (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2004 – January 15, 2004 | Monitoring, Repeat Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- August 20, 2009State Administrative/Compliance Order without penalty issued1 linked violation
- August 20, 2009State Compliance achieved1 linked violation
Common questions
Is SAN JOAQUIN COUNTY - THORNTON required to publish a Consumer Confidence Report?
- Yes. SAN JOAQUIN COUNTY - THORNTON 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 SAN JOAQUIN COUNTY - THORNTON’s next Consumer Confidence Report due?
- SAN JOAQUIN COUNTY - THORNTON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SAN JOAQUIN COUNTY - THORNTON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SAN JOAQUIN COUNTY - THORNTON.
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
IRONS, CLINTON
209-468-3090
STOCKTON, CA 95205