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Water system · PWSID CO0107496

LYONS TOWN OF

LYONS, CO · ~2,990 people served

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

PWSID

CO0107496

State

Colorado

City

LYONS

Population served

2,990

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

35

Violations on record

0

Unaddressed

26

Health-based

88

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2010. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Sep 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2008 Resolved
Monitoring & reporting · Total coliform began Oct 2006 Resolved
Monitoring & reporting · EPA contaminant 0200 began Nov 2003 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jul 1999 Resolved
Monitoring & reporting · Total coliform began Jul 1999 Resolved
Monitoring & reporting · Total coliform began Jun 1999 Resolved
Treatment technique · EPA contaminant 0200 health-based began May 1999 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 1999 Resolved
Treatment technique · EPA contaminant 0200 health-based began Apr 1998 Resolved
Treatment technique · EPA contaminant 0200 health-based began Mar 1998 Resolved
Treatment technique · EPA contaminant 0200 health-based began Feb 1998 Resolved

Recent enforcement actions

  • State action · SOX Aug 2010
  • State action · SIF Nov 2009
  • State action · SIE Oct 2009
  • State action · SIA Oct 2009
  • State action · SOX Apr 2009
  • State action · SOX Aug 2008
  • State action · SIA Aug 2008
  • State action · SIF Aug 2008

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Manganese

2 stations · latest Jan 2025

10.9 · max 60.2 ug/L · 84

Nitrate

2 stations · latest Nov 2024

0.945 · max 3.51 mg/L · 30

Copper

2 stations · latest Jun 2024

1.6 · max 4.5 ug/L · 16

Arsenic

1 station · latest Dec 2024

1 · max 2 ug/L · 9

Lead

2 stations · latest May 2024

0 · max 3 ug/L · 7

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CO0107496 — 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.