LEXINGTON WATER DEPT. (MWRA)

LEXINGTON, MA · ~34,074 people served

Check your exact address → LEXINGTON overview

100

Excellent

PurityRadar safety score

PWSID

MA3155000

State

Massachusetts

City

LEXINGTON

Population served

34,074

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 Mar 2026. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2025 Addressed

Monitoring & reporting · Lead & Copper Rule began Jul 2024 Addressed

Treatment technique · Lead & Copper Rule health-based began Jan 1999 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 Mar 2026
State action · SFJ May 2025
State action · SFL Feb 2025
State action · SFJ Oct 2020
State action · SFL Jan 2017
State action · SFL Jul 2009
State action · SOX Apr 2000
State action · SFL Feb 2000

This profile is built from EPA public records for system MA3155000 — 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.