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Water system · PWSID KY0560258

LOUISVILLE WATER COMPANY

LOUISVILLE, KY · ~764,769 people served

Check your exact address → LOUISVILLE overview

Good

PurityRadar safety score

PWSID

KY0560258

State

Kentucky

City

LOUISVILLE

Population served

764,769

Primary source

Surface water

Score history

▼ 30 points — the score moved from 100 to 70 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 70

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Nov 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

7.5 ppt

limit 4 ppt

Above EPA limit · 1.9×

PFPeA

4.1 ppt

limit —

No federal limit

PFHxA

3.6 ppt

limit —

No federal limit

PFBS

3 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

524

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2008. Official EPA record →

Monitoring & reporting · Bromate began Oct 2006 Resolved

Monitoring & reporting · Total coliform began Jun 2004 Resolved

Monitoring & reporting · Total coliform began Sep 2001 Resolved

Other · EPA contaminant 7000 began Jul 2001 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 1085 began Jan 1999 Resolved

Monitoring & reporting · Cadmium began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 1085 began Jul 1998 Resolved

Monitoring & reporting · Cadmium began Jul 1998 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jul 1998 Resolved

Max contaminant level (MCL) · EPA contaminant 1075 health-based began Jun 1998 Resolved

Max contaminant level (MCL) · Cadmium health-based began Jun 1998 Resolved

Recent enforcement actions

State action · SIF Feb 2008
State action · SIE Feb 2007
State action · SFJ Feb 2007
State action · SIE Feb 2007
State action · SOX Feb 2007
State action · SOX Feb 2007
State action · SIF Feb 2005
State action · SOX Aug 2004

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

1 station · latest Nov 2024

21.4 · max 216 ug/L · 52

Copper

1 station · latest Nov 2024

1.52 · max 6.11 ug/L · 50

Arsenic

1 station · latest Sep 2024

1.13 · max 1.97 ug/L · 18

Lead

1 station · latest Mar 2024

1.67 · max 3.02 ug/L · 10

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 KY0560258 — 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.