Mississippi
A Huge, Boat-Hurdling Carp Is No Mississippi Fish , Life on the Mississippi River with Towboater David, Long-Term Estuary Assessment Group, Lower Mississippi River Forecast Center, Mississippi River Homepage, Mississippi River Parkway Commission, Mississippi River Parkway Commission, Old Man River.com, Upper Mississippi River Conservation Committee, Upper Mississippi River Interest Group
Ohio
Ohio River Basin Commission, Ohio River Valley Water Sanitation Commission, Ohio River Watch, The Ohio River System
Potomac
Bridging the Watershed, GORP: Potomac Basin, Interstate Commission on the Potomac River Basin, Potomac River Guide, The Potomac Conservancy
American Heritage Rivers
US EPA program to help river communities restore their environment, revitalize their economy, renew their culture and preserve their history.
American Rivers
A national non-profit conservation organization dedicated to protecting and restoring America's rivers and to fostering a river stewardship ethic.
Mississippi River Basin Alliance
A citizens' coalition that unites environmental justice organizations and traditional conservation groups around issues impacting the Mississippi River and its tributaries.
River Forecasts
Forecasts for Mississippi, Missouri, Illinois, and Ohio Rivers from NOAA.
River Network
River conservation resources, news, consulting services, land acquisition, grant and contact information for this non-profit organization for the protection of rivers.
Southeast River Forecast Center
National Weather Service office that produces daily river and flood forecasts for rivers in the Southeastern U.S.
The Nationwide Rivers Inventory
A listing of more than 3000 free-flowing river segments in the United States that are believed to possess one or more "outstandly remarkable" natural or cultural values. From the National Park Service.
Upper Mississippi, Illinois and Missouri River Ass
Mission is to promote improvement and maintenance of the flood control and navigation systems in the Upper Mississippi, Illinois and Missouri River Valleys.
USGS Real-Time Water Data
Links to sites throughout the United States, by state, providing water level information.