HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE

HYANNIS, MA · ~35,000 people served

Check your exact address → HYANNIS overview

100

Excellent

PurityRadar safety score

PWSID

MA4020004

State

Massachusetts

City

HYANNIS

Population served

35,000

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 Apr 2024). Levels in parts per trillion (ppt).

PFBA

9.3 ppt

limit —

No federal limit

PFHxA

6.5 ppt

limit —

No federal limit

PFPeA

5.1 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2024. Official EPA record →

Other · EPA contaminant 0700 began Jul 2017 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2009 Resolved

Monitoring & reporting · Total coliform began Sep 2009 Resolved

Other · Total coliform began Aug 2009 Resolved

Monitoring & reporting · Total coliform began Aug 2009 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2009 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jul 2009 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jul 2009 Resolved

Monitoring & reporting · EPA contaminant 2982 began Jul 2009 Resolved

Monitoring & reporting · EPA contaminant 2990 began Jul 2009 Resolved

Monitoring & reporting · EPA contaminant 2981 began Jul 2009 Resolved

Recent enforcement actions

State action · SFL Aug 2024
State action · SIE Jun 2024
State action · SOX Oct 2017
State action · SFJ Sep 2017
State action · SFL Nov 2012
State action · SOX Oct 2010
State action · SOX Apr 2010
State action · SFL Mar 2010

This profile is built from EPA public records for system MA4020004 — 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.