What is the national air quality ranking?

According to the national air quality status released by the Ministry of Ecology and Environment in July 20 19, the top 10 were Haikou, Zhuhai, Lishui, Huangshan, Shenzhen, Zhongshan, Lhasa, Xiamen, Zhoushan and Taizhou.

From July 2065438 to July 2009, the average number of excellent days in 337 cities at prefecture level and above was 85.4%, down 6.9 percentage points year-on-year; The concentration of PM2.5 is 20 μ g/m3, which is flat year-on-year; The concentration of PM 10 was 40 μ g/m3, up 5.3% year-on-year.

O3 concentration was 146 μ g/m3, up 8.1%year-on-year; SO2 concentration was 8 μ g/m3, down11.1%year-on-year; NO2 concentration was 19 μ g/m3, up11.8% year-on-year; The concentration of carbon monoxide was 0.8 mg/m3, which was 1 1. 1% lower than the previous year.

The average number of excellent days in July in "2+26" cities in Beijing, Tianjin and Hebei and its surrounding areas was 38.6%, down 28.7 percentage points year-on-year, and the main pollutant was O3. The concentration of PM2.5 was 34 μ g/m3, down 2.9% year-on-year.

The proportion of excellent days in July in Beijing was 38.7%, down 25.8 percentage points year-on-year, and the main pollutant was O3. The concentration of PM2.5 was 37 μ g/m3, down 15.9% year-on-year.

The average number of excellent days in July in the Yangtze River Delta region of 4 1 city was 8 1.9%, down 9.9 percentage points year-on-year; The concentration of PM2.5 was 23 μ g/m3, up 9.5% year-on-year.

The average number of excellent days in Wei Fen Plain 1 1 city in July was 57.2%, down by 20.8 percentage points year-on-year, and the main pollutant was O3. The concentration of PM2.5 was 25 μ g/m3, down 19.4% year-on-year.

20 19 July, 168 Among the key cities, 20 cities such as Tangshan, Jincheng and Xingtai have poor air quality (168 to149); The air quality in 20 cities such as Haikou, Zhuhai and Lishui is relatively good (from 1 to 20).

Extended data:

In the first half of 20 19, the air quality of 42 cities in China/kloc-0 reached the standard;

According to the national air quality in June-June of 20 19 released by the Ministry of Ecology and Environment. The average number of excellent days in 337 prefecture-level and above cities was 80. 1%, up 0.4 percentage points year-on-year; 142 urban ambient air quality standards, an increase of 20; The concentration of PM2.5 was 40 μ g/m3, down 2.4% year-on-year; The concentration of PM 10 was 69 μ g/m3, down 4.2% year-on-year.

The ozone concentration was 143 μ g/m3, which was the same as last year. The concentration of sulfur dioxide was 12 μ g/m3, down14.3% year on year; The concentration of nitrogen dioxide was 27 μ g/m3, which was flat year-on-year; The concentration of carbon monoxide was 65438 0.5 mg/m3, up 7.65438 0% year-on-year.

The average number of excellent days in "2+26" cities in Beijing, Tianjin and Hebei and its surrounding areas was 47.5%, down 2.3 percentage points year-on-year; The concentration of PM2.5 was 66 μ g/m3, up 4.8% year-on-year. The proportion of excellent days in Beijing was 62.4%, up 2.7 percentage points year-on-year; The concentration of PM2.5 was 46 μ g/m3, down 13.2% year-on-year.

The ratio of 4 1 city average excellent days in the Yangtze River Delta region was 73.6%, down 0.2 percentage points year-on-year; The concentration of PM2.5 was 47 μ g/m3, down 4. 1% year-on-year.

From June to June in 20 19, the air quality in 20 key cities such as Linfen, Xingtai and Shijiazhuang was relatively poor. The air quality in 20 cities such as Haikou, Lhasa and Shenzhen is relatively good.

Judging from the year-on-year improvement of air quality, from June to June, among 168 key cities, 20 cities such as Nanning, Suzhou and Zhaoqing improved their air quality relatively well; The improvement of air quality in 20 cities such as Tai 'an, Dalian and Linyi is relatively poor.

Public trust. Com- National Air Quality Rankings Published in the First 7 Months

People's Daily Online -20 19 In the first half of the year, the air quality of 42 cities in China/KLOC-0 reached the standard.