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Water system · PWSID MT0000256

JOLIET TOWN OF

JOLIET, MT · ~600 people served

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

PWSID

MT0000256

State

Montana

City

JOLIET

Population served

600

Primary source

Groundwater

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

80

Violations on record

1

Unaddressed

0

Health-based

73

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2025 Unaddressed
Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2021 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2021 Resolved
Other · EPA contaminant 7000 began Jul 2020 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Monitoring & reporting · Arsenic began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jan 2011 Resolved
Monitoring & reporting · Fluoride began Jan 2011 Resolved
Monitoring & reporting · Barium began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 1085 began Jan 2011 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2011 Resolved
Monitoring & reporting · Cadmium began Jan 2011 Resolved

Recent enforcement actions

  • State action · SIA Oct 2025
  • State action · SIE Oct 2025
  • State action · SOX Aug 2023
  • State action · SIE Oct 2022
  • State action · SIA Oct 2022
  • State action · SOX Jul 2020
  • State action · SIA Jul 2020
  • State action · SOX Jul 2015

This profile is built from EPA public records for system MT0000256 — 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.