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Region
- Arkansas2
- Colorado2
- ArizonaPima County1
- Columbia Plateau1
- Florida1
- High Plains Aquifer1
- Louisiana1
- Mississippi1
- New HampshirePemigewasset River Watershed1
- New York (State)Black River Watershed (Herkimer County-Jefferson County)1
- New York (State)Genesee County1
- OhioDayton1
- Oro, CanĚada del (Ariz.)1
- Red River Region (Tex. and La.)1
- Saint Lawrence River Watershed1
- South Carolina1
- WyomingCheyenne Region1