SUMAS WATER DEPT
PWS ID: WA5384870 · Sumas, Washington 98295
Population Served
1,740
Total Violations
77
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 838
- County
- Whatcom
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 70
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 28 | 2007 |
| Diquat | MR | 10 | 2005 |
| Coliform (TCR) | MCL | 5 | 2006 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 5 | 2005 |
| ETHYLENE DIBROMIDE | MR | 5 | 2005 |
| Arsenic | MR | 2 | 2008 |
| Fluoride | MR | 2 | 2008 |
| Mercury | MR | 2 | 2008 |
| Selenium | MR | 2 | 2008 |
| Consumer Confidence Rule | Other | 2 | 2013 |
| Coliform (TCR) | MR | 2 | 1992 |
| Cadmium | MR | 2 | 2008 |
| Barium | MR | 2 | 2008 |
| Chromium | MR | 2 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Nickel | MR | 1 | 2008 |
| CYANIDE | MR | 1 | 2008 |
| Beryllium, Total | MR | 1 | 2008 |
| Antimony, Total | MR | 1 | 2008 |
| Thallium, Total | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.