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Water system · PWSID MN1570003

Thief River Falls

Thief River Falls, MN · ~8,701 people served

Check your exact address → Thief River Falls overview
100
Excellent
PurityRadar safety score

PWSID

MN1570003

State

Minnesota

City

Thief River Falls

Population served

8,701

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2023). Levels in parts per trillion (ppt).

PFBA

12 ppt

limit —

No federal limit

Violations & enforcement

19

Violations on record

0

Unaddressed

16

Health-based

89

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jan 2021 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jul 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jun 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began May 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Apr 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Mar 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Feb 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jan 2018 Resolved
Treatment technique · EPA contaminant 0300 health-based began Dec 2017 Resolved
Treatment technique · EPA contaminant 0300 health-based began Oct 2017 Resolved
Treatment technique · EPA contaminant 0300 health-based began Sep 2017 Resolved
Treatment technique · EPA contaminant 0300 health-based began Aug 2017 Resolved

Recent enforcement actions

  • EPA/federal action · EFL Mar 2025
  • State action · SOX Aug 2021
  • State action · SFJ Jun 2021
  • State action · SIE Jun 2021
  • State action · SOX Apr 2019
  • State action · SOX Sep 2018
  • State action · SIF Aug 2018
  • State action · SIE Aug 2018

This profile is built from EPA public records for system MN1570003 — 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.