The book is primarily intended for the use of undergraduate and postgraduate students of environmental science and also useful for the research scholars, environmental consultants, pollution control authorities and those concerned with the environmental issues in any way. It comprises the most suitable methods for the analysis of physical, chemical and biological parameters of water and soil generally conducted in the fieldwork and laboratory. The objective of this book is to acquaint the students and research scholars about the physicochemical and biological processes generally occur between various components in water and sediment soil within the aquatic ecosystem. The information and relevancy on analytical methods was thought to be compiled in a suitable style and simple language in the form of a comprehensive handbook to the benefit of a large number of users. The compilation work has been done with the help of published papers, books, journals as well as periodical reports.