Regional Watersheds

To learn more about our nation’s watersheds, click on the map or use the links below to explore one of the 21 U.S. watersheds.

Click anywhere on the image to visit the regional watershed page for that location.

New England
Mid-Atlantic
South Atlantic-Gulf
Great Lakes
Ohio River Basin
Tennessee River Basin
Mississippi River Basin
Lower Mississippi
Souris River Basins
Missouri River
Arkansas River
Texas-Gulf
Rio Grande
Upper Colorado
Lower Colorado
Great Basin
Pacific Northwest
California
Alaska
Hawaii
Caribbean