PWSID
MA4292000
State
Massachusetts
City
SWANSEA
Population served
17,375
Primary source
Surface water
Score history
▼ 15 points — the score moved from 100 to 85 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 2024). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
4.4 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
7.7 ppt
limit 10 ppt
PFBA
6.4 ppt
limit —
PFHxA
4 ppt
limit —
PFPeA
3.5 ppt
limit —
PFBS
3 ppt
limit —
Violations & enforcement
3
Violations on record
0
Unaddressed
1
Health-based
11
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Aug 2022. Official EPA record →
Recent enforcement actions
- State action · SFL Aug 2022
- State action · SOX Aug 2022
- State action · SIE Nov 2018
- State action · SIE Aug 2018
- State action · SFJ Sep 2017
- State action · SOX Jul 2015
- State action · SO6 Jan 2014
- State action · SFL Jun 2012
This profile is built from EPA public records for system MA4292000 — 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.