Home/ Directory/ MA/ NATICK WATER AND SEWER DIVISION

Water system · PWSID MA3198000

NATICK WATER AND SEWER DIVISION

NATICK, MA · ~37,006 people served

Check your exact address → NATICK overview
58
Fair
PurityRadar safety score

PWSID

MA3198000

State

Massachusetts

City

NATICK

Population served

37,006

Primary source

Groundwater

Score history

▼ 42 points — the score moved from 100 to 58 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 58

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

PFOS

Perfluorooctanesulfonic acid

27 ppt

limit 4 ppt

Above EPA limit · 6.8×

PFOA

Perfluorooctanoic acid

9.7 ppt

limit 4 ppt

Above EPA limit · 2.4×

PFHxS

Perfluorohexanesulfonic acid

4 ppt

limit 10 ppt

Below EPA limit

PFBA

5 ppt

limit —

No federal limit

PFPeA

3.5 ppt

limit —

No federal limit

PFBS

3 ppt

limit —

No federal limit

Violations & enforcement

22

Violations on record

1

Unaddressed

0

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2021. Official EPA record →

Monitoring & reporting · EPA contaminant 3014 began Nov 2011 Unaddressed
Monitoring & reporting · EPA contaminant 2981 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2989 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2983 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2992 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2996 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2987 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2991 began Jan 2011 Resolved

Recent enforcement actions

  • State action · SIE Jul 2021
  • State action · SFL May 2021
  • State action · SFL Jan 2021
  • State action · SFL Jul 2016
  • State action · SIE Jun 2015
  • State action · SFJ Dec 2011
  • State action · SOX May 2011
  • State action · SFL May 2011

This profile is built from EPA public records for system MA3198000 — 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.