PWSID
MA4131000
State
Massachusetts
City
HINGHAM
Population served
45,339
Primary source
Surface water
Score history
▼ 23 points — the score moved from 100 to 77 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Aug 2025). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
6.4 ppt
limit 4 ppt
PFBA
5.7 ppt
limit —
PFBS
3.3 ppt
limit —
PFPeA
3.2 ppt
limit —
PFHxA
3 ppt
limit —
Violations & enforcement
1
Violations on record
0
Unaddressed
1
Health-based
10
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Feb 2016. Official EPA record →
Recent enforcement actions
- State action · SFJ Feb 2016
- State action · SFL Oct 2012
- State action · SIE Jun 2010
- State action · SOX Jun 1996
- State action · SFL Jul 1994
- State action · SFM Sep 1993
- State action · SFL Aug 1993
- State action · SFL Jun 1993
This profile is built from EPA public records for system MA4131000 — 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.