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Water system · PWSID WY5600023

GUERNSEY, TOWN OF

GUERNSEY, WY · ~1,157 people served

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

PWSID

WY5600023

State

Wyoming

City

GUERNSEY

Population served

1,157

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

74

Violations on record

0

Unaddressed

9

Health-based

20

Enforcement actions

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

Monitoring · Lead & Copper Rule began Mar 2025 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved
Monitoring · Lead & Copper Rule began Jan 2024 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jul 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved
Monitoring & reporting · Nitrate began Jan 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2009 Resolved
Monitoring & reporting · Barium began Jan 2008 Resolved
Monitoring & reporting · Chromium (total) began Jan 2008 Resolved
Monitoring & reporting · Selenium began Jan 2008 Resolved

Recent enforcement actions

  • State action · SOX Nov 2025
  • State action · SOX Apr 2025
  • State action · SOX Feb 2024
  • State action · SOX Dec 2019
  • EPA/federal action · EFL Sep 2011
  • State action · SOX Aug 2011
  • State action · SOX Jun 2011
  • State action · SOX May 2011

This profile is built from EPA public records for system WY5600023 — 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.