SONOMA, CA · Sonoma County
MOON VALLEY WATER SYSTEM Water System
Consumer Confidence Report status
MOON VALLEY WATER SYSTEM 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 MOON VALLEY WATER SYSTEM.
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)
- CA4900871
- System type
- Community Water System
- Population served
- 691
- Service connections
- 247
- Ownership
- privately owned
- Water source
- groundwater (wells)
MOON VALLEY WATER SYSTEM is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 691 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 2006, all of which EPA lists as closed. Nothing has been added since 2006.
All 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 inorganic chemicals.
Violation history
Monitoring, Regular
—Nitrate
January 1, 2006 – December 31, 2006
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2006 – December 31, 2006 | Monitoring, Regular | Nitrate | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is MOON VALLEY WATER SYSTEM required to publish a Consumer Confidence Report?
- Yes. MOON VALLEY WATER SYSTEM 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 MOON VALLEY WATER SYSTEM’s next Consumer Confidence Report due?
- MOON VALLEY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MOON VALLEY WATER SYSTEM have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MOON VALLEY WATER SYSTEM.
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
PERRY, LINDA
707-996-2818
SONOMA, CA 95476