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Water system · PWSID MA4075000

DENNIS WATER DISTRICT

SOUTH DENNIS, MA · ~65,000 people served

Check your exact address → SOUTH DENNIS overview
100
Excellent
PurityRadar safety score

PWSID

MA4075000

State

Massachusetts

City

SOUTH DENNIS

Population served

65,000

Primary source

Groundwater

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

Latest detections from EPA’s UCMR5 monitoring (through Apr 2024). Levels in parts per trillion (ppt).

PFHxA

5.6 ppt

limit —

No federal limit

PFPeA

5.1 ppt

limit —

No federal limit

Violations & enforcement

2

Violations on record

0

Unaddressed

2

Health-based

7

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2009. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Dec 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2005 Resolved

Recent enforcement actions

  • State action · SFL Sep 2009
  • State action · SFL May 2007
  • State action · SOX May 2007
  • State action · SFL May 2006
  • State action · SOX May 2006
  • State action · SFL Nov 1990
  • State action · SIF Sep 1984

This profile is built from EPA public records for system MA4075000 — 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.