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Water system · PWSID MA4173000

MATTAPOISETT WATER DEPARTMENT

MATTAPOISETT, MA · ~7,685 people served

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

PWSID

MA4173000

State

Massachusetts

City

MATTAPOISETT

Population served

7,685

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

7

Violations on record

0

Unaddressed

7

Health-based

17

Enforcement actions

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

Max contaminant level (MCL) · Total coliform health-based began Nov 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1995 Resolved

Recent enforcement actions

  • State action · SIE Jun 2025
  • State action · SFL Oct 2021
  • State action · SOX Feb 2016
  • State action · SFJ Feb 2016
  • State action · SOX Nov 2014
  • State action · SFJ Nov 2014
  • State action · SFJ Aug 2013
  • State action · SOX Aug 2013

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

24 stations · latest May 2023

0.88 · max 44 ppm · 80

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system MA4173000 — 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.