Investigations were conducted in four parts of the Sound and is primarily concerned with the pollutional effects of wastes discharged by seven pulp and paper mills. These study areas are Bellingham, Anacortes, Everett, and Port Angeles. Each of these mills discharges untreated or partially treated process wastes into estuarine waters. The objectives of the Project were to determine the effects of these wastes on water quality and marine life, to delineate their interferences with legitimate water uses, and to ascertain pollution abatement needs. The study was begun in April 1962 and was completed in June 1966.