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Water system · PWSID MA3317000

WELLESLEY WATER DIVISION

WELLESLEY, MA · ~29,550 people served

Check your exact address → WELLESLEY overview
54
Fair
PurityRadar safety score

PWSID

MA3317000

State

Massachusetts

City

WELLESLEY

Population served

29,550

Primary source

SWP

Score history

▼ 46 points — the score moved from 100 to 54 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 54

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 2025). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

6.6 ppt

limit 4 ppt

Above EPA limit · 1.6×

PFOA

Perfluorooctanoic acid

6.2 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFBS

5.3 ppt

limit —

No federal limit

PFBA

5.2 ppt

limit —

No federal limit

PFHxA

3.3 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

4

Health-based

9

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2023. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jul 2022 Addressed
Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2000 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1997 Resolved

Recent enforcement actions

  • State action · SFL Feb 2023
  • State action · SOX Sep 2014
  • State action · SFL Aug 2014
  • State action · SOX Jan 2001
  • State action · SOX Jan 2001
  • State action · SFL Jan 2001
  • State action · SOX May 2000
  • State action · SFL Dec 1997

This profile is built from EPA public records for system MA3317000 — 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.