WILLOWSIDE MUTUAL WATER COMPANY
PWS ID: CA4900561 · SANTA ROSA, California 95401
Population Served
448
Total Violations
16
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 160
- County
- Sonoma
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 13
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 6 | 2007 |
| Nitrate | MR | 2 | 2007 |
| ETHYLENE DIBROMIDE | MR | 2 | 2007 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Lead and Copper Rule | MR | 1 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.