Current Memberships

Compacts
- Appalachian Compact
- Atlantic Interstate Compact
- Central Interstate Compact
- Central Midwest Compact
- Midwest Compact
- Northwest Interstate Compact
- Rocky Mountain Compact
- Southeast Compact
- Southwestern Compact
- Texas-Vermont Compact
Compacts
- Appalachian Compact
- Atlantic Interstate Compact
- Central Interstate Compact
- Central Midwest Compact
- Midwest Compact
- Northwest Interstate Compact
- Rocky Mountain Compact
- Southeast Compact
- Southwestern Compact
- Texas-Vermont Compact
Host States
- South Carolina
- Pennsylvania
- Washington
- Utah
Unaffiliated States
- Massachusetts
- New York
Federal Affiliate Members
- U.S. Department of Energy
- U.S. Department of the Army
- U.S. Environmental Protection Agency
- U.S. Nuclear Regulatory Commission
Non-Government Affiliate Members
- Electric Power Research Institute
- EnergySolutions
- EnergySolutions– Barnwell
- Exelon Corporation
- Republic Services Richland
- Nuclear Energy Institute
- URENCO USA
Supporters / Contributors
- Advocates for Responsible Disposal in Texas (ARDT)
- Army Corps of Engineers
- JL Shepherd & Associates
Appalachian Compact
Delaware, Maryland, Pennsylvania (host state), and West Virginia
Atlantic Interstate Compact
Connecticut, New Jersey, and South Carolina (host state)
Central Interstate Compact
Arkansas, Kansas, Louisiana, and Oklahoma (host state)
Central Midwest Compact
Illinois (host state) and Kentucky
Midwest Compact
Indiana, Iowa, Minnesota (host state), Missouri, Ohio, and Wisconsin
Northwest Insterstate Compact
Alaska, Hawaii, Idaho, Montana, Oregon, Utah, Washington (host state), and Wyoming
Rocky Mountain Compact
Colorado (host state), Nevada, and New Mexico
Southeast Compact
Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, Tennessee (host state), and Virginia
Southwestern Compact
Arizona, California (host state), North Dakota, and South Dakota
