ST JOHN TOWN OF
PWS ID: WA5375300 · Washtucna, Washington 99371
Population Served
800
Total Violations
43
Health-Based Violations
12
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 320
- County
- Whitman
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 29
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 12 | 2006 |
| Nitrate | MR | 9 | 2017 |
| Consumer Confidence Rule | Other | 2 | 2024 |
| Lead and Copper Rule | MR | 2 | 2018 |
| Barium | MR | 1 | 2014 |
| Cadmium | MR | 1 | 2014 |
| Chromium | MR | 1 | 2014 |
| Selenium | MR | 1 | 2014 |
| Antimony, Total | MR | 1 | 2014 |
| Beryllium, Total | MR | 1 | 2014 |
| Thallium, Total | MR | 1 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2018 |
| Revised Total Coliform Rule | MON | 1 | 2022 |
| Coliform (TCR) | MR | 1 | 1996 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Arsenic | MR | 1 | 2014 |
| Mercury | MR | 1 | 2014 |
| TTHM | MR | 1 | 2018 |
| Fluoride | MR | 1 | 2014 |
| Nitrite | MR | 1 | 2014 |
| CYANIDE | MR | 1 | 2014 |
| Nickel | MR | 1 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.