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Water system · PWSID MA3308000

WALTHAM WATER DEPARTMENT

WALTHAM, MA · ~65,218 people served

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

PWSID

MA3308000

State

Massachusetts

City

WALTHAM

Population served

65,218

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

12

Violations on record

0

Unaddressed

10

Health-based

27

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 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2012 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1999 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1997 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
Max contaminant level (MCL) · Total coliform health-based began Jul 1991 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1991 Resolved

Recent enforcement actions

  • State action · SFL Mar 2026
  • State action · SFL Nov 2016
  • State action · SOX Jul 2016
  • State action · SFJ Jun 2016
  • State action · SOX Nov 2013
  • State action · SFJ Oct 2013
  • State action · SOX Dec 2012
  • State action · SFL Sep 2012

This profile is built from EPA public records for system MA3308000 — 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.