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Water system · PWSID WY5600779

WINCHESTER HILLS

CHEYENNE, WY · ~1,078 people served

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

PWSID

WY5600779

State

Wyoming

City

CHEYENNE

Population served

1,078

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

15

Violations on record

0

Unaddressed

1

Health-based

19

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2015. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2014 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2014 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Other · EPA contaminant 7000 began Jul 2007 Resolved
Monitoring & reporting · Total coliform began Feb 2004 Resolved
Monitoring & reporting · Gross alpha began Jan 2004 Resolved
Monitoring & reporting · EPA contaminant 4020 began Jan 2004 Resolved
Monitoring & reporting · EPA contaminant 4030 began Jan 2004 Resolved
Monitoring & reporting · Combined radium-226/228 began Jan 2004 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2004 Resolved
Monitoring & reporting · Nitrate began Jan 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2001 Resolved

Recent enforcement actions

  • State action · SOX Aug 2015
  • State action · SOX May 2010
  • EPA/federal action · EOX Oct 2009
  • EPA/federal action · EOX Jun 2009
  • EPA/federal action · EFL Jul 2008
  • State action · SOX Jul 2008
  • State action · SOX Jun 2008
  • State action · SIA Jan 2008

This profile is built from EPA public records for system WY5600779 — 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.