LAKE PRESTON

LAKE PRESTON, SD · ~589 people served

Check your exact address → LAKE PRESTON overview

100

Excellent

PurityRadar safety score

PWSID

SD4600398

State

South Dakota

City

LAKE PRESTON

Population served

589

Primary source

GWP

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 Apr 2021. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Apr 2020 Resolved

Monitoring · Lead & Copper Rule began Apr 2020 Resolved

Other · EPA contaminant 0700 began Sep 2019 Resolved

Treatment technique · EPA contaminant 0400 health-based began May 2017 Resolved

Treatment technique · EPA contaminant 0400 health-based began Oct 2013 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2012 Resolved

Treatment technique · EPA contaminant 0400 health-based began Oct 2011 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2011 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2009 Resolved

Treatment technique · EPA contaminant 0400 health-based began Feb 2009 Resolved

Other · EPA contaminant 7000 began Jul 2003 Resolved

Recent enforcement actions

State action · SOX Apr 2021
State action · SOX Jun 2020
State action · SIF May 2020
State action · SIF May 2020
State action · SIE May 2020
State action · SIE May 2020
State action · SOX Oct 2019
State action · SIA Oct 2019

This profile is built from EPA public records for system SD4600398 — 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.