The standard was formulated for the purpose of implementing the Environmental Protection Law of the People’s Republic of China, Law on the Prevention and Control of Water Pollution, Marine Environmental Protection Law, Decision of the State Council on the Implementation of the Outlook on Scientific Development and Strengthening Environmental Protection and Opinion of the State Council on Preparing the Plan on National Major Function Zones, protecting the environment, preventing and controlling pollution and propelling advances in production process and pollution control technology of ammonia industry. The standard provides the discharge limits for water pollutants from ammonia companies and requirements on monitoring and supervision. Discharge standard of water pollutants for ammonia industry (GB13458-2001) will be abolished upon the date when the standard is put into effect.

 Discharge standard of water pollutants for ammonia industry (GB 13458－2013 replacing GB 13458-2001)