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Region
- PennsylvaniaChester County2
- Tennessee, West2
- Connecticut1
- ConnecticutSimsbury Region1
- DelawareNew Castle County1
- EgyptSinai1
- Farmington River (Mass. and Conn.)1
- Fort Rock Basin (Or.)1
- GeorgiaGlynn County1
- IowaMarion County1
- IowaPella Region1
- Memphis Aquifer1
- New JerseyMorris County1
- New York (State)Mohawk River Watershed1
- OregonLake County1
- Red Rock Dam (Iowa)1
- Skunk Creek (S.D.)1
- South DakotaMinnehaha County1
- VirginiaRichmond1