This catalog has been prepared to demonstrate how EPA had aided in this cause in the past, and, more importantly, how EPA can help now in achieving the universal goal of a clean environment with regard to wastewater. Information is presented on every program in EPA which is concerned with wastewater, whether it be control, treatment, monitoring, or the establishment of standards. Key individuals and organization charts for each program are included; availability of documents and/or information is indicated and sources are listed; important current projects of each program are described. Color illustrations reproduced in black and white.