This document summarizes state submissions and provides a national overview of water quality as requested in Section 305(b) of the 1972 Federal Water Pollution Control Act Amendments (P.L. 92-500). This report provides the first opportunity for states to summarize their water quality and to report to EPA and Congress. Chapters of this report deal with Current Water Quality Conditions, Recent Trends in Water Quality, Major Pollution Problems, Future Program Emphasis, and Costs and Benefits of Achieving the 1983 Goals. Numerous tables and figures are provided to supplement the text. Additionally, the Appendices provide reference information concerning the National Water Quality Surveillance System (NWQSS), the National Eutrophication Survey (NES), and State Agency Addresses. (CS)