SOUTHWEST HARBOR WATER & SEWER DISTRICT
PWS ID: ME0091490 · SOUTHWEST HARBOR, Maine 04679
Population Served
2,480
Total Violations
536
Health-Based Violations
426
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 992
- County
- Hancock
- School/Daycare
- No
- MCL Violations
- 383
- Monitoring Violations
- 84
- Treatment Tech Violations
- 43
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 283 | 2020 |
| Total Haloacetic Acids (HAA5) | MCL | 89 | 2007 |
| Surface Water Treatment Rule | TT | 43 | 1998 |
| Total Haloacetic Acids (HAA5) | MR | 36 | 2022 |
| TTHM | MR | 32 | 2022 |
| Coliform (TCR) | MCL | 11 | 2003 |
| Public Notice | Other | 10 | 2023 |
| Consumer Confidence Rule | Other | 9 | 2022 |
| Asbestos | MR | 4 | 2012 |
| Thallium, Total | MR | 2 | 1993 |
| Beryllium, Total | MR | 2 | 1993 |
| Antimony, Total | MR | 2 | 1993 |
| Nickel | MR | 2 | 1993 |
| Lead and Copper Rule | MR | 2 | 2021 |
| CYANIDE | MR | 2 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.