MADISON SERVICE DIST
PWS ID: CA5700571 · MADISON, California 95653
Population Served
876
Total Violations
53
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 149
- County
- Yolo
- School/Daycare
- No
- MCL Violations
- 19
- Monitoring Violations
- 27
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 10 | 2009 |
| Nitrate | MCL | 9 | 2002 |
| Revised Total Coliform Rule | MON | 7 | 2024 |
| Nitrate | MR | 4 | 2020 |
| Lead and Copper Rule | MR | 3 | 2017 |
| COLIPHAGE | MR | 3 | 2017 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Nitrite | MR | 2 | 2020 |
| Asbestos | MR | 2 | 2008 |
| TTHM | MR | 2 | 2018 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2018 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.