This updated and revised classic text/reference draws upon basic chemical principles to present a quantitative treatment of the processes which determine the composition of natural waters. This edition places greater emphasis on rates of procedures and chemical reactions, reflecting increased information on these aspects of natural water chemistry. Features important advances in understanding mechanisms of redox processes, metal ion speciation and kinetics of complexation. Includes a new chapter on atmosphere-water interactions, demonstrating the important role that water plays in carrying out major chemical reactions in cloud, fog and rain. Contains scores of numerical examples.