According to the Emergency Plan for Heavy Air Pollution in Beijing (revised at the end of 20 16), when it is predicted that the daily average value of the city's air quality index (AQI) is greater than 200 for three consecutive days (namely "five-level heavy pollution") and the daily average value is greater than 300 (namely "six-level heavy pollution"), an orange warning (level 2) will be issued.
The Ministry of Environmental Protection said on the 2nd that there will be a regional heavy pollution weather process in Beijing, Tianjin and Hebei and its surrounding areas from the 4th to the 8th. On the 4th, the air quality was mainly "three-level light pollution", on the 5th-7th, it reached "five-level heavy pollution" and on the 6th, it reached "six-level heavy pollution". Affected by cold air on the evening of the 7th, Beijing's air quality gradually improved.
It is understood that the early warning of heavy air pollution is divided into four levels, from light to heavy, blue, yellow, orange and red.
The health protection measures of orange warning are: children, the elderly and patients with chronic diseases such as respiratory tract, cardiovascular and cerebrovascular diseases should stay indoors as much as possible; Primary and secondary schools and kindergartens stop outdoor courses and activities.
Active emission reduction measures of orange warning include: reducing motor vehicles on the road; Strengthen the implementation of dust control measures in construction sites, exposed ground, material stacking and other places, and strengthen road cleaning; Reduce the use of raw materials and products containing volatile organic compounds, such as paints, coatings and solvents; Enterprises and institutions can commute at peak hours according to air pollution.
The mandatory emission reduction measures of orange warning include: stopping construction operations such as spraying and painting, slope protection and shotcreting, building demolition, cutting and earthwork on outdoor construction sites; On the basis of implementing regional traffic restriction measures during the peak hours of working days, light gasoline vehicles (including driving school coaches) with national I and II emission standards are prohibited from driving on the road; Construction waste, muck and gravel transport vehicles are prohibited from driving on the road (except clean energy vehicles); For enterprises listed in the list of production enterprises to stop production and limit production during the orange warning period of heavy air pollution, implement measures to stop production and limit production; Fireworks and firecrackers and open-air barbecues are prohibited.