Progress in Standardization of Aquatic Toxicity Tests provides a critical evaluation of the level of standardization achieved by freshwater and marine ecotoxicity tests used to evaluate potential risk of new chemicals and wastewater effluents. Tests at the sub-cellular, individual, laboratory microcosm, and ecosystem levels are presented and critically evaluated. The influence of environmental and genetic heterogeneity on test standardization is also discussed. The book will be an excellent reference for industry professionals, consultants, regulatory officials, and students working in the ecotoxicology field.