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Water system · PWSID MA2328000

WESTBOROUGH WATER DEPARTMENT

WESTBOROUGH, MA · ~21,567 people served

Check your exact address → WESTBOROUGH overview

Fair

PurityRadar safety score

PWSID

MA2328000

State

Massachusetts

City

WESTBOROUGH

Population served

21,567

Primary source

Surface water

Score history

▼ 38 points — the score moved from 100 to 62 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 62

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

PFOS

Perfluorooctanesulfonic acid

7.5 ppt

limit 4 ppt

Above EPA limit · 1.9×

PFOA

Perfluorooctanoic acid

4 ppt

limit 4 ppt

Near EPA limit

PFBS

3.4 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Treatment technique · EPA contaminant 0200 health-based began Nov 2025 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved

Monitoring & reporting · Arsenic began Jul 2023 Resolved

Monitoring · Lead & Copper Rule began Feb 2023 Resolved

Monitoring & reporting · EPA contaminant 2050 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2005 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2067 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2959 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2065 began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2051 began Oct 2022 Resolved

Monitoring & reporting · Chlorite began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2046 began Oct 2022 Resolved

Recent enforcement actions

State action · SOX Feb 2026
State action · SFJ Feb 2026
State action · SOX Sep 2025
State action · SOX Feb 2024
State action · SFL Feb 2024
State action · SOX Jun 2023
State action · SFL Jun 2023
State action · SFJ Mar 2023

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

2 stations · latest Aug 2024

3.68 · max 16.6 mg/L · 26

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 MA2328000 — 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.