Through the Industrial Waste Studies Program, the U.S. Environmental Protection Agency is conducting a comprehensive study of industrial waste water technology in an effort to develop effluent limitation guidelines. During the first phase of the program studies of each of twenty-one industrial categories were completed under contract by private firms. Emphasis was placed on collecting the available data concerning the waste water involved, the available control and treatment technology, and the achievable effluent levels. The information contained in this document is based upon the data collected.