MO HB3390

Defines "hyperscale data center" as a facility requiring at least 25 megawatts of energy that houses equipment for data storage, processing, and transmission

Prohibits hyperscale data centers on agricultural, conservation, environmental stewardship, mixed use, and residential zoned land in unincorporated areas, effective August 28, 2026

Bans construction on agricultural land, within 10 miles of agricultural/recreational/conservation areas, or within 5 miles of state waters

Establishes a "Hyperscale Data Center Siting Board" (composed of the Governor, Lieutenant Governor, Secretary of State, Auditor, Treasurer, and Attorney General) that must approve all projects after local approval; denial by the board is final with no appeal

Prohibits government entities from providing economic incentives to hyperscale data centers and bars utilities from passing capital costs for data center construction onto residential or small commercial customers

Requires a "major industrial water user permit" for withdrawals exceeding 2.4 million gallons per day, with permits limited to 5 years and subject to reevaluation during drought emergencies