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Region
- Edwards Aquifer (Tex.)3
- TexasBexar County3
- Georgia2
- ArizonaGlen Canyon Dam Region1
- Colorado River (Colo.-Mexico)1
- Devils Lake Watershed (N.D.)1
- High Plains Aquifer1
- Kansas1
- MichiganKent County1
- MinnesotaMoorhead1
- Montana1
- Nebraska1
- NebraskaPlatte River1
- NebraskaPlatte River Region1
- North DakotaDevils Lake Watershed1
- North DakotaFargo1
- North DakotaFort Berthold Indian Reservation1
- North DakotaFort Totten Indian Reservation1
- OklahomaOklahoma Panhandle1
- United States1