ANTIOCH, CA · Contra Costa County
CITY OF ANTIOCH Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
- CA0710001
- System type
- Community Water System
- Population served
- 115,074
- Service connections
- 33,597
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Treatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
January 1, 1997 – January 31, 1997
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
January 1, 1992 – January 31, 1992
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1997 – January 31, 1997 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
| January 1, 1992 – January 31, 1992 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- December 30, 1992State Compliance achieved1 linked violation
Contact
WOODLAND, BENJAMIN M.
916-767-7536
ANTIOCH, CA 94531-5007