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Water system · PWSID MT0000007

SOUTH CHESTER WATER DIST

CHESTER, MT · ~55 people served

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

PWSID

MT0000007

State

Montana

City

CHESTER

Population served

55

Primary source

SWP

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

47

Violations on record

0

Unaddressed

1

Health-based

42

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2023. Official EPA record →

Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2011 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2011 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jun 2009 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2004 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2004 Resolved
Monitoring & reporting · Thallium began Jan 2000 Resolved
Monitoring & reporting · Total coliform began Jun 1999 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 1999 Resolved
Monitoring & reporting · EPA contaminant 2036 began Jan 1999 Resolved
Monitoring & reporting · EPA contaminant 2020 began Jan 1999 Resolved
Monitoring & reporting · EPA contaminant 2035 began Jan 1999 Resolved

Recent enforcement actions

  • State action · SOX Jul 2023
  • State action · SIA Jul 2023
  • State action · SOX Nov 2012
  • State action · SOX May 2012
  • State action · SIA Jan 2012
  • State action · SIE Jan 2012
  • State action · SIF Jan 2012
  • State action · SFL Apr 2010

This profile is built from EPA public records for system MT0000007 — 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.