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Region
- Arkansas2
- Massachusetts2
- MassachusettsCape Cod2
- MassachusettsCharles River Watershed2
- Nebraska2
- New MexicoAlbuquerque2
- Tennessee River Watershed2
- United States2
- ArizonaWilliams Region1
- ArkansasBeaver Lake1
- ArkansasClarendon Region1
- Brandywine Creek (Pa. and Del.)1
- Brandywine Creek Watershed (Pa. and Del.)1
- Bull Shoals Lake (Ark. and Mo.)1
- California, Southern1
- CaliforniaPanoche Creek1
- CaliforniaPanoche Creek Watershed1
- CaliforniaSan Joaquin River1
- Cannonsville Reservoir Watershed (N.Y.)1
- Chattahoochee River Watershed1