PWSID
010307001
State
Massachusetts
City
Chilmark
Population served
89
Primary source
Groundwater
Score history
No change since tracking began Jun 18, 2026.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.
Violations & enforcement
82
Violations on record
2
Unaddressed
4
Health-based
226
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →
Recent enforcement actions
- EPA/federal action · EOX Sep 2025
- EPA/federal action · EOX Jun 2025
- EPA/federal action · EOX Jun 2024
- EPA/federal action · EOX Jun 2024
- EPA/federal action · EIF Jun 2024
- EPA/federal action · EOX Jun 2024
- EPA/federal action · EIF Jun 2024
- EPA/federal action · EOX Jun 2024
This profile is built from EPA public records for system 010307001 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.