Region
Oklahoma
81
Texas
14
Kansas
10
Arkansas
5
High Plains Aquifer
5
Missouri
3
Central Oklahoma Aquifer (Okla.)
2
Chickasaw National Recreation Area (Okla.)
2
Colorado
2
Cherokee Strip (Okla. and Kan.)
1
Hansford County
1
Lipscomb County
1
Nebraska
1
Ochiltree County
1
Ozark Aquifer (Ark.)
1
Roubidoux Aquifer
1
Salt Plains National Wildlife Refuge
1
Springfield Plateau Aquifer
1
Tishomingo National Wildlife Refuge (Okla.)
1