MUSTARD SEED
PWS ID: WA5312131 · Chehalis, Washington 98532
Population Served
405
Total Violations
28
Health-Based Violations
7
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Lewis
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 21
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 13 | 2011 |
| Coliform (TCR) | MCL | 7 | 1998 |
| Coliform (TCR) | MR | 5 | 2014 |
| Revised Total Coliform Rule | MON | 3 | 2022 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.