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Water system · PWSID MA2282000

STERLING WATER DEPARTMENT

STERLING, MA · ~6,754 people served

Check your exact address → STERLING overview
85
Excellent
PurityRadar safety score

PWSID

MA2282000

State

Massachusetts

City

STERLING

Population served

6,754

Primary source

Groundwater

Score history

▼ 15 points — the score moved from 100 to 85 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 85

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 Aug 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

5.2 ppt

limit 4 ppt

Above EPA limit · 1.3×

Violations & enforcement

60

Violations on record

0

Unaddressed

6

Health-based

44

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2026. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2026 Addressed
Treatment technique · Lead & Copper Rule health-based began Feb 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2018 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2014 Resolved
Other · EPA contaminant 7000 began Jul 2011 Resolved
Monitoring & reporting · Total coliform began Jul 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2010 Resolved
Monitoring & reporting · EPA contaminant 2977 began Oct 2009 Resolved
Monitoring & reporting · EPA contaminant 2982 began Oct 2009 Resolved
Monitoring & reporting · EPA contaminant 2979 began Oct 2009 Resolved
Monitoring & reporting · EPA contaminant 2989 began Oct 2009 Resolved
Monitoring & reporting · EPA contaminant 2976 began Oct 2009 Resolved

Recent enforcement actions

  • State action · SFL Mar 2026
  • State action · SOX Dec 2024
  • State action · SFL Feb 2024
  • State action · SIE Oct 2023
  • State action · SIE Aug 2019
  • State action · SOX Apr 2019
  • State action · SFL Apr 2019
  • State action · SIE Jul 2018

This profile is built from EPA public records for system MA2282000 — 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.