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Water system · PWSID 083090041

FORT BELKNAP AGENCY WATER SYSTEM

HARLEM, MT · ~2,600 people served

Check your exact address → HARLEM overview
100
Excellent
PurityRadar safety score

PWSID

083090041

State

Montana

City

HARLEM

Population served

2,600

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

146

Violations on record

0

Unaddressed

94

Health-based

84

Enforcement actions

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

Monitoring & reporting · EPA contaminant 2964 began Jan 2025 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2022 Resolved
Treatment technique · Bromate health-based began Oct 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2021 Resolved
Treatment technique · Bromate health-based began Oct 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2021 Resolved
Treatment technique · Bromate health-based began Jan 2021 Resolved
Treatment technique · Bromate health-based began Jan 2021 Resolved
Treatment technique · Bromate health-based began Jan 2021 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2021 Resolved

Recent enforcement actions

  • EPA/federal action · EF/ Dec 2025
  • EPA/federal action · EFH Dec 2025
  • State action · SOX Jun 2025
  • State action · SIF May 2024
  • State action · SOX May 2023
  • State action · SOX Nov 2022
  • State action · SIF Aug 2022
  • State action · SOX May 2022

This profile is built from EPA public records for system 083090041 — 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.