The book "Chemistry and microbiology of water (waste water and methods of disinfection)" by A. C. Kukleva is a deep and comprehensive study devoted to one of the most pressing topics of our time water quality and methods of its purification. In the context of global environmental problems related to water pollution and the increase in wastewater volumes, this work is becoming especially important and in demand. Author, A. C. Kuklev is an experienced specialist in the field of chemistry and ecology, who for many years has been studying water resources and their protection. In his book, he shares not only theoretical knowledge, but also practical recommendations, which makes it useful for both students and professionals in the field of ecology, water supply and sanitation. The book covers a wide range of topics, ranging from the chemical composition of wastewater to methods of decontamination. The reader will be able to learn about different types of pollutants, their impact on the ecosystem and human health, as well as about modern technologies used for water purification. Kuklew emphasizes the importance of understanding the microbiological processes occurring in water bodies and their impact on water quality. This information will be of particular interest to ecologists, biologists, and chemists, as well as anyone who seeks a deeper understanding of the ecosystem and its protection. The book will be useful not only to specialists, but also to a wide range of readers interested in environmental issues and sustainable development. Students, graduate students and teachers will be able to find valuable materials for their research and training courses in it . In addition, the book can attract the attention of representatives of public and private organizations involved in water supply and environmental protection. The topics raised in the book are relevant and multifaceted. Kuklew addresses not only chemical and microbiological aspects, but also social, economic and legal issues related to water management. It emphasizes the need for an integrated approach to address water pollution problems and offers a number of recommendations to improve existing wastewater treatment systems. This makes the book not just a textbook, but a real guide to the complex world of water resources. The author's style is distinguished by clarity and accessibility of presentation, which allows even complex scientific concepts to be presented in an understandable and fascinating form. Kuklev uses many examples from practice, which helps the reader to better assimilate the material and see its application in real life. His previous work has also been successful and has been highly appreciated by both the scientific community and a wide audience. “Water chemistry and microbiology (wastewater and decontamination techniques)” is not just a book about science, it is an important step towards understanding the importance of clean water for our health and ecology. It inspires action and offers solutions to the challenges facing humanity in the field of water conservation. If you are looking for information on modern water treatment methods, want to understand how chemical and microbiological processes affect the environment, or are just interested in environmental issues, this book will be an excellent choice for you.