GB 31572-2015 "synthetic resin industrial pollutant emission standard" stipulates the emission limits, monitoring and supervision and management requirements of waste gas and wastewater pollutants in the synthetic resin industrial production process. The standard covers new and existing enterprises, and clearly limits the emission of non-methane total hydrocarbons, particulate matter (PM), chemical oxygen demand and other pollutants. At the same time, it regulates the pollutant sampling method and monitoring frequency, aiming to strengthen the prevention and control of synthetic resin industrial pollution and promote the green and sustainable development of the industry.