Public water system record
Sonoma County Water Agency
On record as serving Sonoma County, CA · Population served not reported
Federal records show no health-based violations and no monitoring or reporting issues for Sonoma County Water Agency 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
- Sonoma County Water Agency draws water from 8 wells.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 179 service lines.
Check whether Sonoma County Water Agency 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 1993
EPA's records for Sonoma County Water Agency go back to 1993. 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 |
|---|---|---|
| 1990s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began January 1994, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
Where the water comes from
Sonoma County Water Agency draws water from 8 wells. 14 other community water systems buy water from Sonoma County Water Agency.
Community systems that buy water from it
- California-American Larkfield (Puc) Sacramento, CA
- City of Cotati Cotati, CA
- City of Petaluma Petaluma, CA
- City of Rohnert Park Rohnert Park, CA
- City of Santa Rosa Santa Rosa, CA
- City of Sonoma Sonoma, CA
- Forestville Water District Forestville, CA
- Kenwood Village Water Company (Puc) Santa Rosa, CA
- Lawndale Mutual Water Company Kenwood, CA
- Marin Municipal Water District Corte Madera, CA
- North Marin Water District Novato, CA
- Penngrove Water Company (Puc) Santa Rosa, CA
- Town of Windsor Windsor, CA
- Valley of the Moon Water District El Verano, CA
Annual water quality report
Sonoma County Water Agency 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.
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