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Water system · PWSID SD4600224

NEW UNDERWOOD

NEW UNDERWOOD, SD · ~679 people served

Check your exact address → NEW UNDERWOOD overview
100
Excellent
PurityRadar safety score

PWSID

SD4600224

State

South Dakota

City

NEW UNDERWOOD

Population served

679

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

36

Violations on record

0

Unaddressed

26

Health-based

139

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2023. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Oct 2022 Resolved
Monitoring · Lead & Copper Rule began Oct 2022 Resolved
Other began May 2013 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2010 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2010 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2010 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2010 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2009 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Oct 2009 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2009 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2009 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2009 Resolved

Recent enforcement actions

  • State action · SIF May 2023
  • State action · SOX May 2023
  • State action · SOX Apr 2023
  • State action · SIE Nov 2022
  • State action · SIE Nov 2022
  • State action · SOX Aug 2015
  • State action · SO6 Jan 2014
  • State action · SOX Mar 2011

This profile is built from EPA public records for system SD4600224 — 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.