Water treatment chemicals are substances used to improve the quality of water through various chemical processes. They help in removing contaminants, balancing water chemistry, and preventing issues such as corrosion and scaling in pipelines and equipment. Common categories of water treatment chemicals include coagulants, flocculants, disinfectants, pH adjusters, and corrosion inhibitors, among others. Each type serves a specific purpose and is essential in different treatment processes, such as municipal wastewater treatment, industrial water treatment, and desalination.