This is the fourth edition of The Clean Water Handbook and the first complete update since the third edition in 2003. This dense book begins by outlining the history, goals and policies, elements, and discharge prohibition of the Clean Water Act (CWA). Clearly aimed at environmental professionals, the book details the National Pollutant Discharge Elimination System permit program, Storm-Water Discharges, Dredge Permits, Enforcement, and other topics. An appendix contains the text of the CWA; a section on resources, notes, and an appendix round out the work. Statutory changes, regulatory enactments, and court decisions have amended this act, originally passed in 1972, so this guide is a valuable resource for those tasked with enforcing compliance.