Section headings and selected papers: Preface. Chlorinated Organic Substances. Contan-tination of chlorinated organic substances in the ocean ecosystem, R. Tatsukawa. Pesticides. Aquatic environmental fate of dettamethrin, R. J. Maguire. Heavy Metal Pollution and Health Risk. Assessment of rapid method for determining heavy metals concentration in industrial wastewater, P. C. Chiang & E. E. Chang. New Methods of Detection and Monitoring Development of detection methods for monitoring of genetically engineered microorgamsms released into environment, Y. lshibashi et al. Detection of Organic Micro-pollutants. New methods for the identification of surfactants and their acid metabolites in raw and drinking water. FAB-MS and MS/ MS,F. Ventura et al. Mutagens in Environmental Water. Genotoxicity of organic substances in municipal sewage and its ozonated products, Y. Ono et al. Mutagens in Drinking Water. Seasonal variation and stability of chlorinated organic mutagens in drinking water, N. Kinae et al. Biological Detoxification of Micropollutants. Development of a kinetic model for prediction of priority pollutant removal from an industrial wastewater treatment plant, G. J. O'Brien. Waste Treatment and Remediation. Risk and Impact Assessment of Micropollutants. Regulatory Approach for Control of Micropollutants. Subject index.