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Region
- Oklahoma3
- AlaskaCook Inlet1
- Arkansas1
- ArkansasSiloam Springs Region1
- ArkansasStamps Region1
- Colorado1
- FloridaBonita Springs Region1
- GeorgiaAlbany1
- GeorgiaPlains1
- Idaho1
- Illinois River (Ark. and Okla.)1
- Illinois River Watershed1
- Illinois River Watershed (Ark. and Okla.)1
- MarylandAberdeen Proving Ground1
- MassachusettsAshumet Pond1
- MassachusettsCharles River1
- OhioLittle Miami River, East Fork1
- OhioWilliam H. Harsha Lake1
- OregonClackamas River Watershed1
- OregonFanno Creek (Multnomah County and Washington County)1