This manual summarizes the accumulation of information and knowledge of environmental microbiology in a single source. It details the natural fate of microorganisms in the environment as well as the intentional attempts to eliminate from the environment microorganisms that are pathogenic to humans or to plants and animals. The basic principles of environmental microbiology and general analytical methodologies, common across the range of the environments covered, are presented first. The core sections are structured with regard to the type of environmental medium being discussed. This landmark effort defines the study of environmental microbiology as we know it today and serves as an essential contribution to the literature. TABLE OF CONTENTS: Introduction to Environmental Microbiology General Methodology Water Microbiology in Public Health Aquatic Environments Soil, Rhizosphere, and Phyllosphere Subsurface and Landfills Aerobiology Biotransformation and Biodegradation.