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Region
- New York (State)Nassau County4
- United States4
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- NebraskaLoup City2
- New Mexico2
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- TexasDallas Region2
- TexasFort Worth Region2
- VirginiaBlacks Run2
- Wyoming2
- AlabamaFlorence Region1
- Animas River Watershed (Colo. and N.M.)1
- CaliforniaLos Angeles County1
- CaliforniaSacramento-San Joaquin Estuary1
- CaliforniaVentura County1
- Calleguas Municipal Water District (Calif.)1
- Calumet Region (Ill. and Ind.)1
- Colorado1
- Connecticut River1