China News Service, June 12th, according to the WeChat public account of the Ministry of Ecology and Environment, the Ministry of Ecology and Environment informed the media today of the state of surface water and ambient air quality throughout the country in May and January-May 2020. The report pointed out that in May, among the 168 key cities, Tangshan, Chengdu, Deyang City and other cities had relatively poor air quality; Zhuhai, Haikou, Lhasa and other cities had relatively good air quality.
According to the report, in May, the proportion of average good days in 337 cities at the prefecture level and above was 85.5%, an increase of 3.3 percentage points year-on-year; the PM2.5 concentration was 24 μg/m3, a decrease of 11.1% year-on-year; and the PM10 concentration was 52 μg/ Cubic meters, a year-on-year decrease of 11.9%; O3 concentration of 153 micrograms/cubic meter, a year-on-year decrease of 0.6%; SO2 concentration of 9 micrograms/cubic meter, a year-on-year decrease of 10%; NO2 concentration of 21 micrograms/cubic meter, a year-on-year decrease of 8.7%; The CO concentration was 0.8 mg/m3, a year-on-year decrease of 11.1%.
From January to May, the proportion of average good days in 337 prefecture-level and higher cities nationwide was 84.9%, an increase of 4.6 percentage points year-on-year; 145 cities met ambient air quality standards, an increase of 27 year-on-year; PM2.5 concentration was 39 micrograms/cubic meter , A year-on-year decrease of 11.4%; PM10 concentration of 63 μg/m3, a year-on-year decrease of 16.0%; O3 concentration of 135 μg/m3, a year-on-year increase of 2.3%; SO2 concentration of 11 μg/m3, a year-on-year decrease of 15.4%; NO2 concentration It is 24 micrograms/cubic meter, down 14.3% year-on-year; CO concentration is 1.4 milligrams/cubic meter, down 6.7% year-on-year.
In May, the average ratio of good days in the "2+26" cities in Beijing, Tianjin and Hebei and surrounding areas was 62.0%, an increase of 11.5 percentage points year-on-year; PM2.5 concentration was 32 micrograms per cubic meter, a decrease of 8.6% year-on-year. From January to May, the average good days ratio was 64.2%, an increase of 11.8 percentage points year-on-year; the PM2.5 concentration was 60 μg/m3, a decrease of 16.7% year-on-year.
The proportion of excellent days in Beijing in May was 67.7%, an increase of 9.6 percentage points year-on-year; the PM2.5 concentration was 36 micrograms/cubic meter, an increase of 2.9% year-on-year. From January to May, the ratio of good days was 78.9%, an increase of 11.4 percentage points year-on-year; the PM2.5 concentration was 45 μg/m3, a decrease of 6.2% year-on-year.
In 41 cities in the Yangtze River Delta region, the average number of good days in May was 73.9%, up 0.4 percentage points year-on-year; the PM2.5 concentration was 30 micrograms/cubic meter, down 6.2% year-on-year. From January to May, the average good days ratio was 84.0%, an increase of 8.7 percentage points year-on-year; the PM2.5 concentration was 40 μg/m3, a decrease of 21.6% year-on-year.
The average good days ratio of 11 cities in Fenwei Plain in May was 76.8%, an increase of 11.4 percentage points year-on-year; PM2.5 concentration was 25 micrograms/cubic meter, a decrease of 13.8% year-on-year. From January to May, the average good days ratio was 67.6%, an increase of 12.6 percentage points year-on-year; the PM2.5 concentration was 58 micrograms/cubic meter, a decrease of 19.4% year-on-year.
In May, among the 168 key cities, Tangshan, Chengdu, Deyang City and other cities had relatively poor air quality (from the last to the 19th place), and Zhuhai, Haikou, Lhasa and other cities had relatively good air quality (from 1st to 20th).
From January to May, the air quality of 168 key cities such as Zhongshijiazhuang, Anyang, Linfen and other cities was relatively poor (from the last to the 20th); Haikou, Lhasa, Zhuhai and other cities had relatively good air quality ( (From 1st to tied for 19th).
The list of the top 20 and the bottom 20 cities in the environmental air of 168 key cities in May 2020
From January to May 2020, the list of 168 key cities ranked in the top 20 and the bottom 20 cities