Spatial Coverage
- Nevada2
- Pennsylvania2
- Powder River Basin (Wyo. and Mont.)2
- Weld County2
- Alamosa River (Colo.)1
- Alberta1
- Alberta.1
- American Samoa1
- Appalachian Region1
- Arizona1
- Barnstable County1
- Bay County1
- Bel Air Region (Harford County)1
- Bexar County1
- Blackfeet Indian Reservation1
- Boulder County1
- Camp Bullis (Tex.)1
- Camp Stanley (Tex.)1
- Central Oklahoma Aquifer (Okla.)1
- Cockeysville Region1
