UPPER PRESTON WATER ASSN
PWS ID: WA5390700 · Falls City, Washington 98024
Population Served
150
Total Violations
27
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 60
- County
- King
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 21
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MR | 7 | 2007 |
| Coliform (TCR) | MR | 5 | 2011 |
| Arsenic | MCL | 2 | 2010 |
| Coliform (TCR) | MCL | 2 | 1992 |
| Lead and Copper Rule | MR | 1 | 1997 |
| Selenium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.