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Region
- American SamoaTutuila Island1
- ArizonaMaricopa County1
- ArizonaSalt River Valley (Gila County and Maricopa County)2
- FloridaHernando County1
- FloridaHighlands County1
- FloridaHunters Lake1
- FloridaOrange County1
- High Plains (U.S.)1
- High Plains Aquifer1
- Hunters Lake (Fla.)1
- Minnesota4
- MinnesotaMinneapolis Region1
- Mississippi1
- Monument Valley (Ariz. and Utah)1
- Nebraska1
- New York (State)Cattaraugus County2
- New York (State)Croton-on-Hudson Region1
- New York (State)Herkimer County1
- New York (State)Oneida County3
- New York (State)Ossining Region1