OAKS WATER USERS ASSOCIATION

NEW UNDERWOOD, SD · ~180 people served

Check your exact address → NEW UNDERWOOD overview

100

Excellent

PurityRadar safety score

PWSID

SD4602135

State

South Dakota

City

NEW UNDERWOOD

Population served

180

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2015. Official EPA record →

Treatment technique · EPA contaminant 0400 health-based began Feb 2015 Resolved

Monitoring & reporting · Gross alpha began Jul 2001 Resolved

Monitoring & reporting · Uranium began Jul 2001 Resolved

Monitoring & reporting · Total coliform began Apr 2001 Resolved

Monitoring & reporting · Total coliform began Sep 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began Feb 1999 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 1998 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 1998 Resolved

Monitoring & reporting · EPA contaminant 2981 began Jan 1998 Resolved

Monitoring & reporting · EPA contaminant 2987 began Jan 1998 Resolved

Monitoring & reporting · EPA contaminant 2992 began Jan 1998 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jan 1998 Resolved

Recent enforcement actions

State action · SOX Mar 2015
State action · SIA Mar 2014
State action · SO6 Jan 2002
State action · SO6 Jan 2002
State action · SOX Dec 2001
State action · SOX Dec 2001
State action · SOX Dec 2001
State action · SIF May 2001

This profile is built from EPA public records for system SD4602135 — 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.