11月中国地级及以上城市平均空气质量优良天数比例为88.2%

Overall Situation - In November, the average PM2.5 concentration across 339 cities in China was 33.9 micrograms per cubic meter, an increase of 4.6% year-on-year [2] - The average PM10 concentration was 59 micrograms per cubic meter, up 9.3% year-on-year [2] - The average O3 concentration was 96 micrograms per cubic meter, down 5.0% year-on-year [2] - The average SO2 concentration remained stable at 8 micrograms per cubic meter [2] - The average NO2 concentration was 25 micrograms per cubic meter, unchanged year-on-year [2] - The average CO concentration was 0.9 milligrams per cubic meter, also stable year-on-year [2] - The proportion of days with good air quality was 88.2%, a decrease of 5.6 percentage points year-on-year [2] - The proportion of days with heavy pollution or worse was 0.7%, an increase of 0.4 percentage points year-on-year [2] - Days exceeding standards due to dust storms accounted for 5.3%, with heavy pollution days at 0.3% [2] Key Regions Beijing-Tianjin-Hebei and Surrounding Areas - The average PM2.5 concentration was 52.4 micrograms per cubic meter, up 9.6% year-on-year [6] - The average O3 concentration was 94 micrograms per cubic meter, down 4.1% year-on-year [6] - The proportion of good air quality days was 70.4%, down 13.0 percentage points year-on-year [6] - The proportion of heavy pollution days was 1.3%, up 0.1 percentage points year-on-year [6] - Dust storm-related exceedance days accounted for 11.8%, with heavy pollution days at 0.3% [6] Yangtze River Delta - The average PM2.5 concentration was 43.6 micrograms per cubic meter, up 47.3% year-on-year [7] - The average O3 concentration was 120 micrograms per cubic meter, up 3.4% year-on-year [7] - The proportion of good air quality days was 78.8%, down 18.3 percentage points year-on-year [7] - The proportion of heavy pollution days was 0.7%, up 0.7 percentage points year-on-year [7] Fenwei Plain - The average PM2.5 concentration was 42.1 micrograms per cubic meter, down 17.0% year-on-year [8] - The average O3 concentration was 86 micrograms per cubic meter, down 7.5% year-on-year [8] - The proportion of good air quality days was 80.8%, up 3.1 percentage points year-on-year [8] - The proportion of heavy pollution days was 0.8%, up 0.3 percentage points year-on-year [8]