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Region
- Alaska1
- ColoradoFountain Creek Watershed1
- ColoradoGunnison River Watershed1
- Galena River Watershed (Wis. and Ill.)1
- HawaiiMolokai1
- IdahoGooding County1
- MarylandCharles County1
- MarylandPrince George's County1
- MassachusettsCape Cod1
- MinnesotaAnoka County1
- MinnesotaMinneapolis Metropolitan Area1
- MinnesotaSaint Paul Metropolitan Area1
- Molokai (Hawaii)1
- Montana1
- MontanaCarbon County1
- Moultrie, Lake (S.C.)1
- Oklahoma1
- Pennsylvania1
- Puerto RicoGuanajibo River Valley1
- Saint Joseph River Watershed (Mich. and Ind.)1