UPPER SKAGIT
PWS ID: 105300048 · MOUNT VERNON, 10 98273
Population Served
365
Total Violations
40
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 98
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 33
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 10 | 2014 |
| Lead and Copper Rule | MR | 7 | 2025 |
| Chlorine | MR | 6 | 2018 |
| Consumer Confidence Rule | Other | 5 | 2014 |
| Revised Total Coliform Rule | MON | 3 | 2018 |
| TTHM | MR | 2 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2014 |
| Nitrate | MR | 2 | 2011 |
| Asbestos | MR | 1 | 2008 |
| Revised Total Coliform Rule | RPT | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.