USGS Real-Time Water Data
- Links to sites throughout the United States, by state, providing water level information.
- http://waterdata.usgs.gov/nwis/rt

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.
- http://www.nps.gov/ncrc/programs/rtca/nri/

Southeast River Forecast Center
- National Weather Service office that produces daily river and flood forecasts for rivers in the Southeastern U.S.
- http://www.srh.noaa.gov/serfc/

River Network
- River conservation resources, news, consulting services, land acquisition, grant and contact information for this non-profit organization for the protection of rivers.
- http://www.rivernetwork.org/

American Rivers
- A national non-profit conservation organization dedicated to protecting and restoring America's rivers and to fostering a river stewardship ethic.
- http://www.americanrivers.org/

River Forecasts
- Forecasts for Mississippi, Missouri, Illinois, and Ohio Rivers from NOAA.
- http://www.riverwatch.noaa.gov

Upper Mississippi, Illinois and Missouri River Association
- Mission is to promote improvement and maintenance of the flood control and navigation systems in the Upper Mississippi, Illinois and Missouri River Valleys.
- http://umimra.org/

American Heritage Rivers
- US EPA program to help river communities restore their environment, revitalize their economy, renew their culture and preserve their history.
- http://www.epa.gov/rivers/