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]

Core Viewpoint - The overall air and surface water quality in China has improved in the first half of the year, as reported by the Ministry of Ecology and Environment [1] Air Quality - In the first half of the year, the average proportion of days with good air quality in 339 cities at or above the prefecture level was 83.8%, an increase of 1 percentage point year-on-year [1] - The average concentration of PM2.5 nationwide was 32.1 micrograms per cubic meter, a decrease of 2.4% compared to the same period last year [1] Surface Water Quality - The report indicates a general trend of improvement in surface water quality, although specific numerical data was not provided in the document [1]

Air Quality Improvement - In the first quarter of this year, the overall air quality in China has continued to improve, with an average of 84.8% of days classified as good across 339 cities, an increase of 1.2 percentage points year-on-year [2] - The average concentration of PM2.5 decreased by 4.8% to 41.3 micrograms per cubic meter, while PM10 concentration fell by 3.0% to 65 micrograms per cubic meter [2] - Key regions such as Beijing-Tianjin-Hebei, Yangtze River Delta, and Fenwei Plain saw respective PM2.5 concentrations of 51.4, 48.2, and 50.2 micrograms per cubic meter, all showing a decline [2] Surface Water Quality Improvement - Among 3,641 national surface water monitoring sections, 91.0% were rated as good quality (Class I-III), an increase of 1.1 percentage points year-on-year, while the proportion of poor quality (Class V) sections remained at 0.7% [3] - The seven major river basins, including the Yangtze and Yellow Rivers, reported a 92.1% good quality rate, up by 0.6 percentage points [3] - In a survey of 196 key lakes and reservoirs, 82.1% were classified as good quality, with the proportion of poor quality lakes decreasing by 0.9 percentage points to 3.6% [3]