Home/ Directory/ CO/ LOUISVILLE CITY OF

Water system · PWSID CO0107487

LOUISVILLE CITY OF

LOUISVILLE, CO · ~20,975 people served

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

PWSID

CO0107487

State

Colorado

City

LOUISVILLE

Population served

20,975

Primary source

Surface water

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

41

Violations on record

0

Unaddressed

2

Health-based

55

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2024. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Resolved
Treatment technique · EPA contaminant 0300 health-based began Dec 2021 Resolved
Treatment technique · EPA contaminant 0200 health-based began Dec 2021 Resolved
Monitoring & reporting · EPA contaminant 3014 began Apr 2018 Resolved
Monitoring & reporting · EPA contaminant 3014 began Jul 2017 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2017 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2017 Resolved

Recent enforcement actions

  • State action · SIA Nov 2024
  • State action · SIE Nov 2024
  • State action · SOX Oct 2024
  • State action · SIF Feb 2022
  • State action · SIF Feb 2022
  • State action · SOX Feb 2022
  • State action · SIA Jan 2022
  • State action · SIA Jan 2022

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

Nitrate

1 station · latest Dec 2024

6.31 · max 10.9 mg/L · 48

Manganese

2 stations · latest May 2025

54 · max 60.2 ug/L · 4

Arsenic

1 station · latest May 2022

0.478 · max 0.697 ug/L · 3

Fluoride

1 station · latest May 2025

0.34 · max 0.461 mg/L · 3

Lead

1 station · latest May 2025

0.329 · max 0.557 ug/L · 2

Copper

1 station · latest May 2025

0.8 · max 0.8 ug/L · 1

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 CO0107487 — 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.