GRAND ISLAND MANSION
PWS ID: CA3400455 · WALNUT GROVE, California 95690
Population Served
600
Total Violations
4
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Sacramento
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 4
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 2 | 2012 |
| Revised Total Coliform Rule | MON | 2 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.