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Region
- Southern States4
- Floridan Aquifer2
- Louisiana2
- Mississippi River2
- Mississippi River Valley2
- PennsylvaniaBucks County2
- Arkansas1
- Florida1
- FloridaSaint Johns County1
- High Plains Aquifer1
- Hudson River Watershed1
- Indiana1
- Kansas1
- Middle West1
- PennsylvaniaChester County1
- Springfield (Bucks County, Pa. : Township)1
- TennesseeArnold Air Force Base1
- TennesseeCoffee County1
- TennesseeFranklin County1