CDT Environmental Technology Investment Holdings Limited designs, develops, manufactures, sells, installs, operates, and maintains sewage treatment systems in China. The company sells complete sewage treatment systems; constructs rural sewage treatment plants; installs systems; and provides on-going operation and maintenance services for systems and plants in China for municipalities and enterprise clients. It provides sewage treatment services, such as on-site or in-situ septic tank treatment services in the urban and rural areas for municipalities, and residential and business property management companies. The company was incorporated in 2016 and is based in Shenzhen, China.