This dataset contains the air pollutant and meteorological data of five provinces in China, including Nanjing, Beijing, Wuhan, Guangzhou and Chengdu. These provinces are highly polluted by ozone. The dataset has air pollutant and meteorological data of nine monitoring stations in each province. Each monitoring station is labeled by thire ID and the geographical location is also saved in the same directory. Each row contains three kinds of information: 1) timestamp(year, month, day and hour); 2) air pollutant(AQI, PM2.5, PM10, SO2, NO2, O3 and CO); 3)meteorological data(radial wind - u and v, temperature, relative humidity and planetary boundary layer height). These monitoring data is from 2015 to 2021.