Public water system record
Moon Valley Water System
Serves Sonoma, Sonoma County, CA · 691 people served
Federal records show no health-based violations and no monitoring or reporting issues for Moon Valley Water System in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Moon Valley Water System draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, December 2007.
- Record on file since 2006, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 249 service lines.
Check whether Moon Valley Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016, and no monitoring or reporting violations either.
Full record since 2006
EPA's records for Moon Valley Water System go back to 2006. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began November 2007, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Nov 1, 2007 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against Moon Valley Water System in 2007. The most recent was a compliance order (no penalty) in December 2007.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 28, 2007 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 13, 2007 | California | Compliance order (no penalty) | 1 violation: Nitrate |
Where the water comes from
Moon Valley Water System draws water from 1 well. It also has an emergency connection to City of Sonoma.
Emergency or part-time connections to
- City of Sonoma Sonoma, CA
Annual water quality report
Moon Valley Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells