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Water system · PWSID SD4600376

WOONSOCKET

WOONSOCKET, SD · ~618 people served

Check your exact address → WOONSOCKET overview
100
Excellent
PurityRadar safety score

PWSID

SD4600376

State

South Dakota

City

WOONSOCKET

Population served

618

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

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

54

Violations on record

1

Unaddressed

6

Health-based

138

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2025. Official EPA record →

Monitoring & reporting · EPA contaminant 3014 began Aug 2024 Unaddressed
Monitoring & reporting · EPA contaminant 0999 began Apr 2015 Resolved
Treatment technique · EPA contaminant 0400 health-based began Feb 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2013 Resolved
Treatment technique · Lead & Copper Rule health-based began Oct 2011 Resolved
Treatment technique · Lead & Copper Rule health-based began Apr 2010 Resolved
Treatment technique · Lead & Copper Rule health-based began Apr 2010 Resolved
Treatment technique · EPA contaminant 0400 health-based began Feb 2010 Resolved
Monitoring & reporting · EPA contaminant 2985 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2009 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2009 Resolved

Recent enforcement actions

  • State action · SIF Apr 2025
  • State action · SIE Sep 2024
  • State action · SOX Dec 2016
  • State action · SOX Jan 2016
  • State action · SIF Aug 2015
  • State action · SIE Jul 2015
  • State action · SOX Mar 2014
  • State action · SIA Mar 2014

This profile is built from EPA public records for system SD4600376 — 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.