OAK BLUFFS WATER DISTRICT

OAK BLUFFS, MA · ~24,000 people served

Check your exact address → OAK BLUFFS overview

100

Excellent

PurityRadar safety score

PWSID

MA4221000

State

Massachusetts

City

OAK BLUFFS

Population served

24,000

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

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 Dec 2023). Levels in parts per trillion (ppt).

PFHxA

4 ppt

limit —

No federal limit

PFPeA

4 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2025. Official EPA record →

Other · EPA contaminant 7000 began Jul 2015 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Aug 2014 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 2013 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2013 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 2012 Resolved

Monitoring & reporting · EPA contaminant 2977 began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 2980 began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 2979 began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 2981 began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 2990 began Oct 2010 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 2976 began Oct 2010 Resolved

Recent enforcement actions

State action · SFO Aug 2025
State action · SFJ Aug 2015
State action · SOX Jul 2015
State action · SOX Oct 2014
State action · SFJ Sep 2014
State action · SFJ Oct 2013
State action · SOX Aug 2013
State action · SFJ Aug 2013

This profile is built from EPA public records for system MA4221000 — 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.