F0/100
LOUISVILLE WATER COMPANY — Water Quality Report 2026
Serving 764,769 people · Kentucky
Water Source
Surface Water
County
—
System ID
KY0560258
Violations
81
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 230.00 µg/L | — | Above Goal |
1,4-dioxane | 0.890 µg/L | — | Above Goal |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About LOUISVILLE WATER COMPANY
Is LOUISVILLE WATER COMPANY water safe to drink?
LOUISVILLE WATER COMPANY water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 81 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has LOUISVILLE WATER COMPANY detected?
76 contaminants were tested in LOUISVILLE WATER COMPANY's water. Notable contaminants include Lead (90th percentile), chlorate, 1,4-dioxane. No contaminants exceed EPA legal limits. 3 exceed EPA health goals (MCLGs).
Does LOUISVILLE WATER COMPANY have any EPA violations?
Yes, LOUISVILLE WATER COMPANY has 81 EPA violation(s) on record, with the most recent in 2006. Violation types include MR, Other, MCL. 7 are health-based violations.
How many people does LOUISVILLE WATER COMPANY serve?
LOUISVILLE WATER COMPANY serves approximately 764,769 people, Kentucky.
What type of water does LOUISVILLE WATER COMPANY provide?
LOUISVILLE WATER COMPANY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is KY0560258.
How does LOUISVILLE WATER COMPANY compare to other utilities in Kentucky?
LOUISVILLE WATER COMPANY scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Kentucky state page for a full comparison of water systems.