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Water system · PWSID MT0000235

HARDIN CITY OF

HARDIN, MT · ~3,500 people served

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

PWSID

MT0000235

State

Montana

City

HARDIN

Population served

3,500

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 Dec 2024). Levels in parts per trillion (ppt).

Lithium

29,000 ppt

limit —

No federal limit

Violations & enforcement

25

Violations on record

0

Unaddressed

6

Health-based

47

Enforcement actions

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

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2025 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2020 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2014 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Other · EPA contaminant 7000 began Jul 2012 Resolved
Other · EPA contaminant 7000 began Jul 2010 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved
Monitoring & reporting · Bromate began Jul 2004 Resolved
Monitoring & reporting · Bromate began Jul 2004 Resolved
Monitoring & reporting · Bromate began Jul 2004 Resolved

Recent enforcement actions

  • State action · SIF Nov 2025
  • State action · SOX Jul 2025
  • State action · SIE Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Oct 2021
  • State action · SIA Oct 2021
  • State action · SIE Oct 2021
  • State action · SOX Jan 2014

This profile is built from EPA public records for system MT0000235 — 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.