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Region
- Arkansas3
- Kansas2
- MassachusettsCape Cod2
- Alabama1
- Altus, Lake, Watershed (Okla. and Tex.)1
- ArizonaPinal Creek Watershed1
- CaliforniaSanta Ana River Watershed1
- ColoradoBoulder Creek Watershed (Boulder County and Weld County)1
- ColoradoFountain Creek1
- ColoradoFountain Creek Watershed1
- Florida1
- FloridaBiscayne Aquifer1
- Georgia1
- High Plains Aquifer1
- Hueco Bolson1
- IllinoisChicago1
- Indiana1
- IndianaCamp Atterbury1
- IndianaEdinburgh Region1
- KansasQuivira National Wildlife Refuge1