SIASCONSET WATER DEPARTMENT

NANTUCKET, MA · ~3,000 people served

Check your exact address → NANTUCKET overview

100

Excellent

PurityRadar safety score

PWSID

MA4197001

State

Massachusetts

City

NANTUCKET

Population served

3,000

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

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

Violations on record

Unaddressed

Health-based

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

Monitoring & reporting · Total coliform 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 Aug 2010 Resolved

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

Max contaminant level (MCL) · Total coliform health-based began Jun 2007 Resolved

Recent enforcement actions

State action · SFL Aug 2022
State action · SOX Aug 2022
State action · SOX Aug 2013
State action · SFJ Aug 2013
State action · SOX Nov 2010
State action · SFL Nov 2010
State action · SFL Nov 2009
State action · SOX Nov 2009

This profile is built from EPA public records for system MA4197001 — 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.