Basin City Water Sewer District
PWS ID: WA5304461 · Mesa, Washington 99343
Population Served
1,740
Total Violations
68
Health-Based Violations
22
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 266
- County
- Franklin
- School/Daycare
- No
- MCL Violations
- 22
- Monitoring Violations
- 41
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 14 | 2025 |
| Lead and Copper Rule | MR | 12 | 2021 |
| Revised Total Coliform Rule | MON | 10 | 2024 |
| Coliform (TCR) | MCL | 8 | 2011 |
| Coliform (TCR) | MR | 8 | 1999 |
| Nitrate | MR | 5 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2022 |
| TTHM | MR | 2 | 2022 |
| Consumer Confidence Rule | Other | 2 | 2025 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2014 |
| ETHYLENE DIBROMIDE | MR | 1 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.