Region
United States
12
Arizona
2
California
1
Chesapeake Bay Region (Md. and Va.)
1
Chesapeake Bay Watershed
1
Clark Fork (Mont. and Idaho)
1
Delaware River Watershed (N.Y.-Del. and N.J.)
1
Fossil Creek
1
Fossil Creek (Ariz.)
1
Montana
1
Nevada
1
Ohio River Watershed
1
Sawtooth National Forest (Idaho and Utah)
1
Stanislaus National Forest
1
Verde River
1
Verde River (Ariz.)
1
Wasatch National Forest (Utah and Wyo.)
1