Cloud Seeding by State
All 50 states — programs, bans & legislation
A comprehensive guide to cloud seeding and weather modification programs across every US state. Know what's happening in your skies.
No active cloud seeding programs.
No cloud seeding programs. Indigenous groups have protested geoengineering experiments.
Historical cloud seeding for drought relief. Has considered narrow geoengineering bans.
No active cloud seeding programs.
Active cloud seeding for water supply in multiple counties and watersheds.
Active statewide cloud seeding program targeting snowpack augmentation.
No active cloud seeding programs.
No active cloud seeding programs.
BANNED — Comprehensive ban signed into law (SB 56). Unauthorized geoengineering is a felony.
No active programs. Home of Rep. Greene, primary CLEAR Skies Act sponsor.
Historical pineapple industry cloud seeding. No active programs.
Major active program — $4M/year for snowpack augmentation.
No active programs. State committee rejected geoengineering ban proposal.
No active cloud seeding programs.
No active programs. Farmers have voiced opposition to weather modification.
Active cloud seeding for hail suppression and rain enhancement.
Anti-geoengineering legislation has been introduced.
BANNED — Passed legislation banning geoengineering practices.
No active cloud seeding programs.
No active cloud seeding programs.
No active cloud seeding programs.
No active cloud seeding programs.
No active cloud seeding programs.
No active programs. Committee rejected geoengineering ban.
Clear Skies Act legislation introduced (HB 2388 / HB 2656).
BANNED aerosol injection/solar radiation management. Cloud seeding for water resources permitted.
Active cloud seeding for hail suppression and precipitation enhancement.
Active cloud seeding for water supply augmentation.
No active programs. Committee rejected geoengineering ban.
Anti-geoengineering legislation introduced (SB 4161).
Active cloud seeding for drought mitigation and water supply.
Historic cloud seeding by NYC for water supply (1950s). No current programs.
Clean Skies Geoengineering Ban introduced (HB 362).
Active statewide cloud seeding for rain enhancement and hail suppression.
No active cloud seeding programs.
Active cloud seeding for precipitation enhancement.
Historical cloud seeding. Community petitions to stop programs.
Clean Air Preservation Act introduced (SB 508) with strong enforcement.
Broad geoengineering ban proposed (HB 5217) with citizen reporting.
No active cloud seeding programs.
Active cloud seeding. Site of tragic 1972 Rapid City flood linked to cloud seeding.
BANNED — First state to ban intentional weather/sunlight modification (2024).
Active programs. Government ban proposed (SB 1154). Requires TDLR permits.
Major active program — fully remote statewide mountain cloud seeding.
Clean Air Preservation Act introduced (HB 217).
No active cloud seeding programs.
Historical programs. Home of controversial geoengineering experiment shut down in 2024.
No active cloud seeding programs.
No active programs. Rep. Wied co-sponsors federal CLEAR Skies Act.
Active program. Narrowly avoided cloud seeding ban in February 2025.
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