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Region
- Black Creek Aquifer (S.C. and N.C.)1
- Fort Peck Indian Reservation (Mont.)1
- MontanaBig Horn County1
- MontanaDaniels County1
- MontanaFort Peck Indian Reservation1
- MontanaNorthern Cheyenne Indian Reservation1
- MontanaRosebud County1
- MontanaRosebud Creek1
- MontanaSheridan County1
- NevadaNevada National Security Site1
- North CarolinaBladen County1
- North CarolinaHoke County1
- North CarolinaRobeson County1
- North CarolinaScotland County1
- North DakotaWilliams County1
- Northern Cheyenne Indian Reservation (Mont.)1