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Water system · PWSID MA4050000

CANTON WATER DEPT

CANTON, MA · ~22,453 people served

Check your exact address → CANTON overview
86
Excellent
PurityRadar safety score

PWSID

MA4050000

State

Massachusetts

City

CANTON

Population served

22,453

Primary source

SWP

Score history

▼ 14 points — the score moved from 100 to 86 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 86

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jul 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

4.9 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFPeA

3.4 ppt

limit —

No federal limit

PFHxA

3.2 ppt

limit —

No federal limit

4:2 FTS

3 ppt

limit —

No federal limit

Violations & enforcement

8

Violations on record

0

Unaddressed

7

Health-based

20

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jul 2024 Addressed
Max contaminant level (MCL) · Total coliform health-based began Aug 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2012 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
Max contaminant level (MCL) · Total coliform health-based began Jul 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2012 Resolved
Max contaminant level (MCL) · EPA contaminant 2964 health-based began Jan 2011 Resolved

Recent enforcement actions

  • State action · SFL Jan 2025
  • State action · SFJ Apr 2014
  • State action · SFJ Nov 2013
  • State action · SOX Nov 2013
  • State action · SOX Jan 2013
  • State action · SFL Nov 2012
  • State action · SIE Nov 2012
  • State action · SOX Aug 2012

This profile is built from EPA public records for system MA4050000 — 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.