This report summarizes the state submissions and provides a national overview of water quality as required in Section 305(b) of the 1972 Federal Water Pollution Control Act Amendments (P.L. 92-500). Topics receiving the greatest coverage include toxic substances, quantitative assessments of the percentage of waters currently meeting the goals of the Act and the percentage expected to meet those goals by 1983, and analysis of the effectiveness of current pollution control programs. Separate sections of the document are devoted to analysis of oil spills, the water quality of the Great Lakes, and projected municipal and industrial costs associated with meeting the goals of the Act. The report also presents profiles of 17 areas across the country where pollution control programs have succeeded in reestablishing significant beneficial water uses. (CS)