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Water system · PWSID MT0000330

SIDNEY CITY OF

SIDNEY, MT · ~5,000 people served

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

PWSID

MT0000330

State

Montana

City

SIDNEY

Population served

5,000

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

Latest detections from EPA’s UCMR5 monitoring (through Jun 2025). Levels in parts per trillion (ppt).

Lithium

37,700 ppt

limit —

No federal limit

Violations & enforcement

1

Violations on record

0

Unaddressed

0

Health-based

6

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2009. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2004 Resolved

Recent enforcement actions

  • State action · SOX May 2009
  • State action · SOX Sep 2006
  • State action · SIF Sep 2006
  • State action · SIE Jan 2005
  • State action · SIA Jan 2005
  • State action · SIA Sep 1984

This profile is built from EPA public records for system MT0000330 — 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.