Ohio River Valley Water Sanitation Commission: Multi-state cooperative water quality improvement program. Includes online information about river conditions.
Ohio River Watch: Links to finding a towboat and getting updates of the Ohio including three day forecasts, local river stages, and water elevations.
The Ohio River System: The Ohio River begins at the confluence of the Allegheny and Monongahela rivers at the Point in Pittsburgh, Pa., and flows 981 miles to join the Mississippi at Cairo, Ill.