From January to March, the average number of good days in 339 cities at the prefecture level and above was 83.8%

　　China News Service, April 20. According to the official WeChat news of the Ministry of Ecology and Environment, the Ministry of Ecology and Environment announced on the 20th the national ambient air quality status in March and January-March 2022.

From January to March, the average number of days with good days in 339 cities at the prefecture level and above was 83.8%, an increase of 2.9 percentage points year-on-year.

Overall situation

　　In March, the average number of good days in 339 cities at the prefecture level and above was 87.2%, an increase of 5.4 percentage points year-on-year; the average PM2.5 concentration was 32 micrograms/m3, a year-on-year decrease of 15.8%; the average PM10 concentration was 61 micrograms/cubic m, a year-on-year decrease of 10.3%; the average concentration of O3 was 121 micrograms/cubic meter, a year-on-year increase of 6.1%; the average SO2 concentration was 9 micrograms/cubic meter, a year-on-year decrease of 10.0%; the average NO2 concentration was 23 micrograms/cubic meter, a year-on-year decrease of 14.8% %; the average concentration of CO was 0.9 mg/m3, a year-on-year decrease of 10.0%.

　　From January to March, the average number of good days in 339 cities at the prefecture level and above was 83.8%, an increase of 2.9 percentage points year-on-year; the average PM2.5 concentration was 43 micrograms/m3, a year-on-year decrease of 4.4%; the average PM10 concentration was 65 micrograms per cubic meter, down 13.3% year-on-year; the average concentration of O3 was 110 micrograms/cubic meter, up 1.9% year-on-year; the average SO2 concentration was 10 micrograms/cubic meter, down 16.7% year-on-year; the average concentration of NO2 was 25 micrograms/cubic meter, up 16.7% year-on-year A decrease of 13.8%; the average CO concentration was 1.2 mg/m3, a year-on-year decrease of 7.7%.

Proportion of days at each level in 339 cities at the prefecture level and above from January to March 2022

Concentrations and year-on-year changes of six indicators in 339 prefecture-level and above cities across the country from January to March 2022

key area

　　In March, the average number of good days in the “2+26” cities in Beijing-Tianjin-Hebei and surrounding areas was 64.7%, a year-on-year increase of 13.9 percentage points; the PM2.5 concentration was 51 micrograms per cubic meter, a year-on-year decrease of 17.7%.

From January to March, the average number of days with good quality was 63.5%, a year-on-year increase of 7.4 percentage points; the PM2.5 concentration was 63 micrograms/m3, a year-on-year decrease of 3.1%.

　　The proportion of good days in Beijing in March was 87.1%, a year-on-year increase of 51.6 percentage points; the PM2.5 concentration was 40 micrograms/m3, a year-on-year decrease of 50.0%.

From January to March, the proportion of good days was 90.0%, a year-on-year increase of 31.1 percentage points; the PM2.5 concentration was 36 micrograms/m3, a year-on-year decrease of 40.0%.

　　The average number of good days in 41 cities in the Yangtze River Delta region in March was 89.1%, a year-on-year decrease of 1.5 percentage points; the PM2.5 concentration was 33 micrograms per cubic meter, a year-on-year decrease of 8.3%.

From January to March, the average number of days with good quality was 82.2%, a year-on-year decrease of 5.2 percentage points; the PM2.5 concentration was 46 micrograms/m3, a year-on-year increase of 7.0%.

　　The average number of good days in the 11 cities in the Fenwei Plain in March was 52.8%, down 0.3 percentage points year-on-year; the PM2.5 concentration was 55 micrograms/m3, down 3.5% year-on-year.

From January to March, the average number of days with good quality was 50.1%, a year-on-year decrease of 7.8 percentage points; the PM2.5 concentration was 75 micrograms/m3, a year-on-year increase of 13.6%.

Comparison of air quality in the country and key regions from January to March 2022

Ranking of key cities

　　In March, among the 168 key cities, cities such as Haikou, Lhasa and Zhoushan had relatively good air quality (from 1st to 20th); cities such as Xianyang, Taiyuan and Yangquan had relatively poor air quality (from the bottom to the bottom). 1 to 20th from the bottom).

　　The list of the top 20 and bottom 20 cities in the air quality ranking of 168 key cities in March 2022

　　From January to March, among the 168 key cities, the air quality of Lhasa, Haikou and Zhoushan was relatively good (from 1st to 20th); the air quality of Urumqi, Xianyang and Nanyang was relatively poor (from 1st to 20th). 1st from last to tie for last 20th).

The changes in air quality in cities such as Huludao, Zhangjiakou and Tangshan were relatively good (from the 1st to the 20th); the changes in air quality in cities such as Xiaogan, Huaibei and Jinzhong were relatively poor (from the last to 20th). 20th from the bottom).

　　List of top 20 and bottom 20 cities in air quality of 168 key cities from January to March 2022

　　List of top 20 and bottom 20 cities in air quality changes of 168 key cities from January to March 2022