In November, the average PM2.5 concentration across 339 prefecture-level and above cities nationwide was 33.9 micrograms per cubic meter, representing a 4.6% year-on-year increase. The average PM10 concentration was 59 micrograms per cubic meter, up 9.3% year-on-year. The average O3 concentration was 96 micrograms per cubic meter, down 5.0% year-on-year. The average SO₂ concentration was 8 μg/m³, unchanged year-on-year; the average NO₂ concentration was 25 μg/m³, unchanged year-on-year; and the average CO concentration was 0.9 mg/m³, unchanged year-on-year.

In November, the average proportion of days with good or excellent air quality across 339 prefecture-level and above cities nationwide was 88.2%, down 5.6 percentage points year-on-year; the average proportion of days with severe or worse pollution was 0.7%, up 0.4 percentage points year-on-year. The average proportion of days with exceedances caused by sandstorms was 5.3%, of which the proportion of days with severe or worse pollution was 0.3%.

Proportion of Days by Pollution Level in 339 Prefecture-Level and Above Cities, November 2025

Comprehensive Air Quality Index and PM2.5 Concentration Status in 168 Key Cities for November and January–November

See attached table for details

Source: Ministry of Ecology and Environment