CHELMSFORD WATER DISTRICT

CHELMSFORD, MA · ~28,750 people served

Check your exact address → CHELMSFORD overview

Fair

PurityRadar safety score

PWSID

MA3056000

State

Massachusetts

City

CHELMSFORD

Population served

28,750

Primary source

Groundwater

Score history

▼ 48 points — the score moved from 100 to 52 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 52

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

PFOA

Perfluorooctanoic acid

7.3 ppt

limit 4 ppt

Above EPA limit · 1.8×

PFOS

Perfluorooctanesulfonic acid

5.8 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFBS

4.2 ppt

limit —

No federal limit

PFPeA

3.2 ppt

limit —

No federal limit

PFHxA

3.1 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2014. Official EPA record →

Other · EPA contaminant 7000 began Jul 2014 Resolved

Monitoring & reporting · Nitrate began Jul 2013 Resolved

Recent enforcement actions

State action · SFJ Aug 2014
State action · SOX Aug 2014
State action · SOX Dec 2013
State action · SFJ Dec 2013
State action · SFL Nov 2009
State action · SFL Jul 2009
State action · SFO Sep 2006
State action · SFO Apr 2006

This profile is built from EPA public records for system MA3056000 — 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.