This text book deals with the analysis of physico chemical and biological parameters and reflects on the status of the environment in connection with both the biotic and a biotic factors. This help in utilizing the resources in right manner in order to curb the pollution, to boost the productivity and the conserve the prosperity of the biodiversity. Since there is a constant interaction and exchange of mass and energy in an ecosystem. Thus in present book an attempt has been mode to evaluate the important physico-chemical parameters, biological parameters such as Plankton and to overcome the problem of unhygienic water condition for safe drinking water.Authors believes that this book will surely serve the purpose of those poor people who consume unhygienic water.