In the first 11 months of this year, the average number of days in Beijing, Tianjin, Hebei and surrounding areas was 66.2%.

　　China News Agency, Beijing, December 26 (Reporter Ruan Yulin) The Ministry of Ecology and Environment of China notified the media on the 26th of the national ambient air quality status, showing that in the first 11 months of this year, the average number of days in the "2+26" cities in the Beijing-Tianjin-Hebei region and the surrounding areas The proportion of good days The average concentration of PM2.5 (fine particulate matter) is 42 micrograms per cubic meter.

　　In November, the average number of days with good air quality in 339 prefecture-level and above cities across the country was 91.9%, a year-on-year increase of 3.8 percentage points; the average PM2.5 concentration was 34 micrograms per cubic meter, a year-on-year decrease of 5.6%.

From January to November, the average number of days with good air quality in 339 prefecture-level and above cities across the country was 86.8%, a year-on-year decrease of 0.8 percentage points; the average concentration of PM2. The concentration was 147 micrograms per cubic meter, a year-on-year increase of 6.5%.

　　In November, the average number of days in "2+26" cities in Beijing, Tianjin, Hebei and surrounding areas was 68.3%, an increase of 1.0 percentage points year-on-year; the average concentration of PM2.5 was 64 micrograms per cubic meter, an increase of 10.3% year-on-year.

From January to November, the average number of days in "2+26" cities in Beijing-Tianjin-Hebei and surrounding areas was 66.2%; the average concentration of PM2.5 was 42 micrograms per cubic meter, the same as last year.

　　In November, the proportion of good days in Beijing was 73.3%, a year-on-year decrease of 3.4 percentage points; the PM2.5 concentration was 45 micrograms per cubic meter, a year-on-year increase of 2.3%.

From January to November, the proportion of good days in Beijing was 76.6%, a year-on-year decrease of 0.6 percentage points; the PM2.5 concentration was 31 micrograms per cubic meter, a year-on-year decrease of 6.1%.

　　The report shows that from January to November this year, among the 168 key cities, Lhasa, Haikou and Zhoushan had relatively good air quality; cities such as Weinan, Jingzhou and Xianyang had relatively poor air quality.

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