Public Water System

Thief River Falls

PWSID MN1570003 · Minnesota · 8,701 people served

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Thief River Falls is an EPA-regulated public water system in Minnesota (PWSID MN1570003). It serves an estimated 8,701 residents — a small town of customers — across 1 community across 1 ZIP code.

Over the past five years, Thief River Falls has recorded 3 EPA health-based violations. The grade of C summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

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Centered on the averaged ZIP-code centroid of 1 ZIP served.

Population

8,701

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for Thief River Falls over the past five years of EPA SDWIS reporting.

E. Colimicrobial

EPA Code 0300 · Treatment Technique Violation

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

—

First Reported

Jan 2025

Most Recent

Jan 2025

What this violation means

E. coli detection is an EPA Tier 1 acute violation, requiring same-day public notification. It confirms that fecal matter has entered the drinking water supply, posing immediate health risks — particularly to children, the elderly, and immunocompromised individuals.

Recommended precautions

→Do not drink the water until the utility has lifted the advisory.
→Boil water for at least one minute (three minutes at elevations above 6,500 ft).
→Disinfect dishes and surfaces that touched contaminated water.
→Seek medical attention if you develop bloody diarrhea or persistent vomiting.

Read the complete guide to E. Coli

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by Thief River Falls

Thief River Falls

ZIP Codes Served

56701

About this system

EPA records this system as PWSID MN1570003. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact Thief River Falls directly or review their annual Consumer Confidence Report (CCR).