Surveys the state-of-the-art in the toxicology of important aquatic pollutants. Evaluates new concepts, methods, and data, and provides an overview of key research results. Topics covered range from the principles of aquatic toxicology and the development of water quality guidelines for the protection of aquatic resources, to the environmental effects of monitoring and future trends in water quality management. Emphasized is the importance of the linkages between aquatic and terrestrial ecosystems to practical and effective environmental effects assessment.