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Water system · PWSID MA4197000

WANNACOMET WATER COMPANY

NANTUCKET, MA · ~27,703 people served

Check your exact address → NANTUCKET overview
100
Excellent
PurityRadar safety score

PWSID

MA4197000

State

Massachusetts

City

NANTUCKET

Population served

27,703

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

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

15

Violations on record

1

Unaddressed

6

Health-based

30

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2022. Official EPA record →

Other · EPA contaminant 7000 began Jul 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2022 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2011 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2009 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2008 Resolved
Other · EPA contaminant 7500 began Apr 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2008 Resolved
Monitoring & reporting · Total coliform began Mar 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2007 Resolved
Monitoring & reporting · Total coliform began Aug 2007 Resolved

Recent enforcement actions

  • State action · SFL Aug 2022
  • State action · SOX Aug 2022
  • State action · SFJ Feb 2018
  • State action · SOX Feb 2018
  • State action · SFJ Dec 2016
  • State action · SFJ Aug 2015
  • State action · SOX Aug 2015
  • State action · SFL Nov 2012

This profile is built from EPA public records for system MA4197000 — 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.