Aquinnah Wampanoag
PWS ID: 010307001 · Chilmark, 01 02535
Population Served
89
Total Violations
240
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 32
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 210
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 24 | 2025 |
| Coliform (TCR) | MR | 20 | 2014 |
| Lead and Copper Rule | MR | 15 | 2024 |
| Coliform (TCR) | MCL | 14 | 2011 |
| Arsenic | MR | 6 | 2023 |
| Cadmium | MR | 6 | 2023 |
| Chromium | MR | 6 | 2023 |
| CYANIDE | MR | 6 | 2023 |
| Fluoride | MR | 6 | 2023 |
| Mercury | MR | 6 | 2023 |
| Antimony, Total | MR | 6 | 2023 |
| Thallium, Total | MR | 6 | 2023 |
| E. COLI | MR | 6 | 2016 |
| Revised Total Coliform Rule | RPT | 6 | 2025 |
| Selenium | MR | 6 | 2023 |
| Beryllium, Total | MR | 6 | 2023 |
| Lead and Copper Rule | TT | 6 | 2009 |
| Barium | MR | 6 | 2023 |
| Endrin | MR | 3 | 2017 |
| Toxaphene | MR | 3 | 2017 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2017 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2017 |
| Hexachlorocyclopentadiene | MR | 3 | 2017 |
| Atrazine | MR | 3 | 2017 |
| Heptachlor | MR | 3 | 2017 |
| 2,4-D | MR | 3 | 2017 |
| HEXACHLOROBENZENE | MR | 3 | 2017 |
| Benzo(a)pyrene | MR | 3 | 2017 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2017 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.