The water quality in the lower Bear River Basin, Utah, was examined to assist the Bureau of Reclamation in planning reclamation projects in the area and to assist the Utah Water Pollution Control Board in controlling water pollution problems there. Focus was on the chemical and bacteriological quality of the Lower Bear River and its tributaries as well as with the discharge of wastes into the Bear River that affect water quality. The discharge of untreated and partially treated industrial and domestic wastes was found to be largely responsible for the high bacterial content of the river water at most of the sampling stations. High salt content was also found near Corinne, making the water unsuitable for most domestic and industrial purposes.