FORT THOMPSON WATER SYSTEM

FORT THOMPSON, SD · ~1,357 people served

Check your exact address → FORT THOMPSON overview

100

Excellent

PurityRadar safety score

PWSID

084690440

State

South Dakota

City

FORT THOMPSON

Population served

1,357

Primary source

Surface water

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

101

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2024. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2024 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2024 Resolved

Treatment technique · EPA contaminant 0800 health-based began Sep 2022 Resolved

Monitoring & reporting · Fluoride began Jan 2022 Resolved

Monitoring · Lead & Copper Rule began Jun 2021 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2012 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2012 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2012 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2012 Resolved

Monitoring & reporting · Total coliform began Apr 2012 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2012 Resolved

Recent enforcement actions

State action · SOX Aug 2024
State action · SOX Aug 2024
State action · SOX Jun 2023
State action · SOX Mar 2023
State action · SOX Jul 2021
State action · SOX May 2020
State action · SOX Aug 2014
State action · SIF Sep 2013

This profile is built from EPA public records for system 084690440 — 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.