7月城市平均空气质量优良天数比例达93.0%

Core Insights - The Ministry of Ecology and Environment reported that the average PM2.5 concentration in 339 cities was 14.5 micrograms per cubic meter in July, representing an 8.2% year-on-year decrease [1] - The average number of days with good air quality was 93.0%, an increase of 1.0 percentage points year-on-year [1] Group 1: National Air Quality - PM2.5 average concentration in 339 cities: 14.5 micrograms per cubic meter, down 8.2% year-on-year [1] - PM10 average concentration: 28 micrograms per cubic meter, down 3.4% year-on-year [1] - Average days with good air quality: 93.0%, up 1.0 percentage points year-on-year [1] - Average days with severe pollution: 0.2%, down 0.1 percentage points year-on-year [1] Group 2: Regional Air Quality - Beijing-Tianjin-Hebei region PM2.5 average concentration: 18.3 micrograms per cubic meter, down 21.1% year-on-year [1] - Average days with good air quality in this region: 75.7%, down 4.6 percentage points year-on-year [1] - Beijing's PM2.5 concentration: 18.3 micrograms per cubic meter, down 31.2% year-on-year [1] - Average days with good air quality in Beijing: 83.9%, up 16.2 percentage points year-on-year [1] Group 3: Yangtze River Delta and Fenwei Plain - Yangtze River Delta PM2.5 average concentration: 14.6 micrograms per cubic meter, down 3.9% year-on-year [1] - Average days with good air quality in the Yangtze River Delta: 87.8%, down 5.9 percentage points year-on-year [1] - Fenwei Plain PM2.5 average concentration: 18.5 micrograms per cubic meter, down 20.6% year-on-year [1] - Average days with good air quality in the Fenwei Plain: 82.1%, up 14.1 percentage points year-on-year [1]