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Water system · PWSID MA4072000

DARTMOUTH WATER DIVISION

DARTMOUTH, MA · ~24,630 people served

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

PWSID

MA4072000

State

Massachusetts

City

DARTMOUTH

Population served

24,630

Primary source

SWP

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

PFOS

Perfluorooctanesulfonic acid

51 ppt

limit 4 ppt

Above EPA limit · 12.7×

PFOA

Perfluorooctanoic acid

4.2 ppt

limit 4 ppt

Above EPA limit · 1.0×

PFBS

21 ppt

limit —

No federal limit

PFPeA

12 ppt

limit —

No federal limit

PFBA

9.4 ppt

limit —

No federal limit

PFHxA

7.6 ppt

limit —

No federal limit

PFHpA

3 ppt

limit —

No federal limit

Violations & enforcement

8

Violations on record

0

Unaddressed

4

Health-based

19

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2024. Official EPA record →

Monitoring & reporting · EPA contaminant 3002 began Oct 2024 Addressed
Monitoring & reporting · EPA contaminant 3002 began Aug 2020 Resolved
Other · EPA contaminant 7500 began Jan 2020 Resolved
Treatment technique · Lead & Copper Rule health-based began Dec 2019 Resolved
Reporting · Lead & Copper Rule began Nov 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2009 Resolved

Recent enforcement actions

  • State action · SFL Oct 2024
  • State action · SOX Oct 2023
  • State action · SIE Sep 2021
  • State action · SOX Oct 2020
  • State action · SFL Oct 2020
  • State action · SFJ Feb 2020
  • State action · SOX Feb 2020
  • State action · SIE Nov 2018

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

1 station · latest Aug 2022

0.88 · max 0.88 ppm · 1

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 MA4072000 — 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.