In January, the air quality ranking of China's key cities was announced, and cities in Hebei dropped out of the top 20 worst cities

　　China News Agency, Beijing, February 21 (Reporter Ruan Yulin) The reporter learned on the 21st that the Ministry of Ecology and Environment of China reported that the air quality rankings of China's key cities in January showed that Xianyang, Xi'an, and Weinan were among the top three with the worst air quality in the country. The obvious change is that cities in Hebei Province have withdrawn from the list of the bottom 20 cities in the country for air quality.

　　According to the Ministry of Ecology and Environment's report on the national ambient air quality status, in January, among the 168 key cities, Lhasa, Fuzhou, Haikou, Huizhou, Shenzhen, Xiamen, Zhuhai, Dongguan, Lishui, Zhangjiakou and other cities had relatively good air quality; Xianyang, Xi'an The air quality of cities such as Weinan and Weinan is relatively poor.

　　In January, the average proportion of days with good air quality in 339 prefecture-level and above cities across the country was 74.3%, an increase of 0.9 percentage points year-on-year; the average proportion of days with heavy pollution and above was 5.4%, an increase of 2.3 percentage points year-on-year.

During the same period, the average proportion of good days in "2+26" cities in Beijing-Tianjin-Hebei and surrounding areas was 56.0%, an increase of 13.7 percentage points year-on-year; the average proportion of days with heavy pollution and above was 11.2%, an increase of 2.9 percentage points year-on-year.

Puyang, Zhengzhou, Liaocheng, Heze, Jining and other cities had more severe and above pollution days.

　　The relevant person in charge of the Ecological Environment Monitoring Department of the Ministry of Ecology and Environment stated that in January, the proportion of good days nationwide increased by 0.9 percentage points year-on-year, but the proportion of heavily polluted days also increased by 2.3 percentage points year-on-year. A total of 564 days of heavy pollution occurred in cities at the prefecture level and above across the country. The year-on-year increase of 239 days was mainly due to the joint influence of three factors including the continuous heavy pollution process in key areas across the year, fireworks and firecrackers during the Spring Festival, and more sand and dust weather year-on-year.

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