Louisville, KY water quality
Louisville, KY is served by 1 public water system, serving 806,997 people combined. Across those systems, we count 0 health-based violations in the last 5 years. The worst Tap Grade among them is B.
Water systems serving Louisville
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Is Louisville, KY tap water safe to drink?
1 public water system serve Louisville, KY, with 0 health-based violations in the last 5 years across them. The worst Tap Grade among them is B. A Tap Grade summarizes public EPA compliance records; it is not a determination that water is safe or unsafe to drink.
Does Louisville's water have lead in it?
The most recent 90th-percentile lead sample is 1.1 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Louisville's water?
Yes — at least one water system serving Louisville has detected PFAS under UCMR5.
Source: EPA SDWIS/ECHO · Data as of 2026Q2
TapGraded presents public EPA data for information only — it is not health advice and not a determination that any water is safe or unsafe to drink. For health concerns, contact your water utility or local health department.