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Water system · PWSID MT0000153

BILLINGS CITY OF

BILLINGS, MT · ~114,000 people served

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

PWSID

MT0000153

State

Montana

City

BILLINGS

Population served

114,000

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).

Lithium

38,000 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

0

Health-based

1

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2008. Official EPA record →

Monitoring & reporting · Total coliform began Nov 1998 Resolved
Monitoring & reporting · Total coliform began Aug 1998 Resolved
Monitoring & reporting · Total coliform began Jul 1998 Resolved
Monitoring & reporting · Total coliform began Aug 1993 Resolved

Recent enforcement actions

  • State action · SOX Dec 2008

This profile is built from EPA public records for system MT0000153 — 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.