MARLBOROUGH DPW WATER DIV. (MWRA)

MARLBOROUGH, MA · ~41,799 people served

Check your exact address → MARLBOROUGH overview

100

Excellent

PurityRadar safety score

PWSID

MA2170000

State

Massachusetts

City

MARLBOROUGH

Population served

41,799

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

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

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

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Dec 2020 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2020 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2012 Resolved

Monitoring & reporting · Lead & Copper Rule began Apr 2012 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2011 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2009 Resolved

Monitoring & reporting · EPA contaminant 0200 began Feb 2006 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jan 2006 Resolved

Monitoring & reporting · EPA contaminant 0200 began Dec 2005 Resolved

Monitoring & reporting · EPA contaminant 0200 began Nov 2005 Resolved

Monitoring & reporting · EPA contaminant 0200 began Oct 2005 Resolved

Monitoring & reporting · EPA contaminant 0200 began Sep 2005 Resolved

Recent enforcement actions

State action · SOX Mar 2021
State action · SFJ Mar 2021
State action · SOX Mar 2021
State action · SFL Mar 2021
State action · SOX Dec 2017
State action · SFL Dec 2017
State action · SFO May 2014
State action · SOX Jun 2013

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

3 stations · latest Sep 2024

6.28 · max 19 mg/L · 34

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system MA2170000 — 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.