According to the report, the average number of excellent days in 1- 13 cities in Beijing-Tianjin-Hebei region was 56.0%, down 0.8 percentage points year-on-year. The concentration of PM2.5 was 64 μ g/m3, down 9.9% year-on-year; The concentration of PM 10 was 1 13 μ g/m3, down 4.2% year-on-year. Among them, from June 5438+ 10 to June 5438+2, since the implementation of the Action Plan for Comprehensive Control of Air Pollution in Autumn and Winter in Beijing, Tianjin and Hebei and Its Surrounding Areas 20 17-20 18, the top six cities with the largest decline in PM2.5 concentration are Shijiazhuang, Beijing, Langfang and Baoding respectively. Compared with the same period of last year, the concentration of PM2.5 decreased significantly.
In 20 17, the average number of excellent days in Beijing was 62. 1%, up 6.9 percentage points year-on-year. The concentration of PM2.5 was 58 μ g/m3, a year-on-year decrease of 20.5%; The concentration of PM 10 was 84 μ g/m3, down 5.6% year-on-year. The Beijing Municipal Environmental Protection Bureau announced earlier this month that Beijing has completed the national "Ten Atmospheric Tasks". Excellent days increased by 28 days compared with 20 16, reaching 226 days; The days of severe pollution decreased by 16 days, which was 23 days. In the past five years, the average annual concentration of major pollutants in Beijing has obviously decreased, especially sulfur dioxide. In 20 17 years, the average annual concentration of sulfur dioxide dropped to single digits for the first time, which was 8 μ g/m3.
The proportion of average excellent days from 1 to 12 in 25 cities in the Yangtze River Delta region was 74.8%, down by 1.3 percentage points year-on-year. The concentration of PM2.5 was 44 μ g/m3, down 4.3% year-on-year; The concentration of PM 10 was 7 1 μ g/m3, down 5.3% year-on-year; From June 5438+0 to June 5438+February in nine cities in the Pearl River Delta region, the average proportion of excellent days was 84.5%, down 5.0 percentage points year-on-year. The concentrations of PM2.5 and PM 10 are 34 μ g/m3 and 53 μ g/m3, respectively, which both meet the national second-class annual average concentration standard.
According to the report, from June 5438+0 to February 10, the last 10 cities with relatively poor air quality are: Shijiazhuang, Handan, Xingtai, Baoding, Tangshan, Taiyuan, Xi 'an, Hengshui, Zhengzhou and Jinan. The former 10 cities are Haikou, Lhasa, Zhoushan, Xiamen, Fuzhou, Huizhou, Shenzhen, Lishui, Guiyang and Zhuhai.
20 17 is the last year of the implementation of the first phase of "ten atmospheric articles". The Action Plan for the Prevention and Control of Air Pollution, known as the "Ten Atmospheric Articles", was formulated and released in 20 13, and it was proposed that by 20 17, the concentration of inhalable particulate matter (PM 10) in cities at prefecture level and above in China would be lower than that in 20 12 years. The concentration of fine particulate matter (PM2.5) in Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta regions decreased by about 25%, 20% and 15% respectively, and the average annual concentration of PM2.5 in Beijing was controlled at about 60 μ g/m3.