Eastern Study Area

• Bellwood
• Cedar Bluffs
• Clarks
• Colon
• Elgin
• Humphrey
• Osceola
• Shelby
• Stromsburg
• York

Central Study Area

• Anselmo
• Cairo
• Elwood
• Shelton

Panhandle Study Area

• Bridgeport
• Broadwater
• Lodgepole
• Lyman
• Morrill
• Oshkosh

Republican River/Frenchmen Creek Study Area

• Benkleman
• Cambridge
• Culbertson
• Haigler
• McCook
• Palisade
• Stratton
• Wauneta