SONOMA, CA · Sonoma County
SONOMA, CITY OF 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)
- CA4910012
- System type
- Community Water System
- Population served
- 11,725
- Service connections
- 4,343
- Ownership
- local government
- Water source
- groundwater (wells)
Violation history
Monitoring, Routine (IDSE)
—TTHM
January 1, 2020 – December 31, 2020
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
January 1, 2010 – January 31, 2010
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | TTHM | — | Resolved |
| January 1, 2010 – January 31, 2010 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 19, 2024State Compliance achieved7 linked violations
- September 19, 2024State Compliance achieved7 linked violations
- July 28, 2006State Violation/Reminder Notice19 linked violations
Contact
BERGER, MIKE
707-933-2230
SONOMA, CA 95476