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Region
- Minnesota5
- FloridaHillsborough County4
- Georgia4
- New JerseyOcean County3
- New York (State)Oneida County3
- ArizonaSalt River Valley (Gila County and Maricopa County)2
- Colorado2
- FloridaHighlands County2
- High Plains Aquifer2
- Kansas2
- New JerseyGloucester County2
- New JerseyRancocas Creek Watershed2
- New York (State)Cattaraugus County2
- North Carolina2
- Oklahoma2
- South Carolina2
- TexasEdwards Plateau Region2
- TexasTrinity River Watershed2
- American SamoaTutuila Island1
- Anderson County (S.C.)1