上半年我国环境空气质量和地表水环境质量总体持续改善

Core Insights - The overall air quality and surface water quality in China have shown continuous improvement in the first half of this year, with 83.8% of days classified as good air quality, a 1 percentage point increase year-on-year [1] - The proportion of surface water quality classified as good (Class I to III) stands at 89% across 3,641 national monitoring sections [1] Air Quality Summary - In key regions, the average PM2.5 concentration in the Beijing-Tianjin-Hebei region's "2+36" cities is 40.8 micrograms per cubic meter, a decrease of 15.4% year-on-year [1] - The average PM2.5 concentration in the Yangtze River Delta's 31 cities is 37.4 micrograms per cubic meter, down 4.3% year-on-year [1] - The average PM2.5 concentration in the Fenwei Plain's 13 cities is 38.3 micrograms per cubic meter, a reduction of 13.7% year-on-year [1] Surface Water Quality Summary - The proportion of good water quality (Class I to III) in major river basins, including the Yangtze, Yellow, Pearl, Songhua, Huai, Hai, and Liao rivers, is 90.4%, an increase of 0.1 percentage points year-on-year [1] - The proportion of sections classified as poor quality (Class V and below) is 0.8%, an increase of 0.3 percentage points year-on-year [1] - Among 209 monitored key lakes and reservoirs, 78% are classified as good quality (Class I to III), a decrease of 1.5 percentage points year-on-year, while 3.8% are classified as poor quality, a decrease of 0.5 percentage points year-on-year [1]