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- Minnesota3
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- New York (State)Oneida County3
- New JerseyGloucester County2
- New JerseyRancocas Creek Watershed2
- Oklahoma2
- TexasEdwards Plateau Region2
- TexasTrinity River Watershed2
- Appalachian Region1
- Central Oklahoma Aquifer (Okla.)1
- FloridaHillsborough County1
- FloridaPalm Beach County1
- GeorgiaRichmond County1
- Hillsborough County (Fla.)1
- Indiana1
- KentuckyJefferson County1
- Lake Tahoe Basin National Forest (Calif. and Nev.)1
- LouisianaVernon Parish1
- MinnesotaMinneapolis Region1
- Mississippi1