WATERTOWN WATER DEPT. (MWRA)

WATERTOWN, MA · ~35,329 people served

Check your exact address → WATERTOWN overview

100

Excellent

PurityRadar safety score

PWSID

MA3314000

State

Massachusetts

City

WATERTOWN

Population served

35,329

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2009. Official EPA record →

Treatment technique · Lead & Copper Rule health-based began Jan 1996 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 · SFJ Jun 2009
State action · SFL Aug 2005
State action · SOX Jun 1998
State action · SFL Dec 1997
State action · SFO Nov 1997
State action · SOX Sep 1997
State action · SFL Mar 1997
State action · SOX Mar 1995

This profile is built from EPA public records for system MA3314000 — 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.