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Water system · PWSID MA3274000

SOMERVILLE WATER DEPT. (MWRA)

SOMERVILLE, MA · ~81,045 people served

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

PWSID

MA3274000

State

Massachusetts

City

SOMERVILLE

Population served

81,045

Primary source

SWP

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

11

Violations on record

0

Unaddressed

10

Health-based

26

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jan 2020 Addressed
Treatment technique · Lead & Copper Rule health-based began Nov 2019 Addressed
Max contaminant level (MCL) · Total coliform health-based began Nov 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2009 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2000 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 2000 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1998 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1994 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1993 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1992 Resolved

Recent enforcement actions

  • State action · SFL Apr 2024
  • State action · SFO Jul 2021
  • State action · SFL Nov 2017
  • State action · SFL Jan 2017
  • State action · SFO Jan 2015
  • State action · SOX Jan 2011
  • State action · SFL Dec 2010
  • State action · SOX Dec 2009

This profile is built from EPA public records for system MA3274000 — 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.