Yes, rainwater collection is legal in Kentucky, but compliance hinges on adherence to state and local water rights laws, particularly for potable use. The Kentucky Division of Water permits rainwater harvesting for non-potable purposes under general water use regulations, though no statewide statute explicitly governs it. Municipalities like Louisville and Lexington impose additional restrictions, requiring permits for systems exceeding 500 gallons. Recent 2026 compliance shifts emphasize stormwater management alignment, with the Kentucky Energy and Environment Cabinet reviewing larger-scale systems for environmental impact.
Key Regulations for Rainwater Collection in Kentucky
- Water Rights Compliance: Collection must not interfere with existing riparian or prior appropriation rights, per KRS 151.010–151.250. Systems diverting runoff from shared watersheds may trigger review by the Kentucky Division of Water.
- Potable vs. Non-Potable Use: The Kentucky Department for Public Health defers to local health departments for potable systems, which often require treatment certifications. Non-potable use (e.g., irrigation, toilet flushing) faces fewer restrictions but must comply with plumbing codes (KRS 318.010).
- Municipal Permitting: Cities like Louisville Metro require permits for systems over 500 gallons under stormwater ordinances (Chapter 156.050). Lexington-Fayette County enforces similar thresholds via its Urban County Code §18.300.