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Region
- Louisiana5
- Mississippi2
- Alamosa River (Colo.)1
- AlaskaKoyukuk River Valley1
- Arkansas1
- Black Creek Aquifer (S.C. and N.C.)1
- British Columbia1
- CaliforniaMojave River Watershed1
- CaliforniaSan Bernardino County1
- ColoradoConejos County1
- ColoradoJackson County1
- ColoradoNorth Park Region1
- FloridaBroward County1
- FloridaEscambia County1
- FloridaMatlacha Pass1
- FloridaSanta Rosa County1
- Fort Peck Indian Reservation (Mont.)1
- Gallatin River Watershed (Wyo. and Mont.)1
- IdahoBoise Region1
- KentuckyLouisville1