生态环境部：我国环境空气质量和地表水环境质量持续改善

Core Viewpoint - The Ministry of Ecology and Environment of China announced that the air quality and surface water quality in the country continue to improve, with significant reductions in pollutant concentrations and increases in the proportion of good air quality days and excellent water quality sections by 2025 [1][3][4]. Air Quality Summary - The average PM2.5 concentration in 339 cities is 28.0 micrograms per cubic meter, a year-on-year decrease of 4.4% [3]. - The average PM10 concentration is 48 micrograms per cubic meter, down 2.0% year-on-year [3]. - The proportion of days with good air quality is 89.3%, an increase of 1.9 percentage points year-on-year [3]. - The proportion of days with heavy pollution is 0.9%, unchanged from the previous year [3]. - In the Beijing-Tianjin-Hebei region, the average PM2.5 concentration is 37.3 micrograms per cubic meter, down 11.6% year-on-year [3]. - The Yangtze River Delta region has an average PM2.5 concentration of 31.7 micrograms per cubic meter, a decrease of 3.9% year-on-year [3]. - The Fenwei Plain region shows a PM2.5 concentration of 33.7 micrograms per cubic meter, down 14.9% year-on-year [3]. Surface Water Quality Summary - Among 3,641 national surface water monitoring sections, 91.4% are classified as good quality (Class I-III), an increase of 1.0 percentage points year-on-year [4]. - The proportion of sections classified as poor quality (Class V) is 0.6%, unchanged from the previous year [4]. - In major river basins, 93.0% of monitoring sections are of good quality, up 0.6 percentage points year-on-year [4]. - The proportion of good quality lakes and reservoirs is 78.5%, an increase of 1.4 percentage points year-on-year [4]. - The proportion of poor quality lakes and reservoirs is 3.3%, down 1.0 percentage points year-on-year [4]. Ecological Assessment Summary - The Ministry has completed ecological assessments in nine key regions, including the Yellow River Basin and the Yangtze River Economic Belt, indicating a preliminary halt in the deterioration of ecosystems [4][5]. - The Yellow River Basin has established a governance system that promotes ecological quality improvement, with vegetation coverage expanding approximately 300 kilometers westward [5]. - Groundwater levels in the Beijing-Tianjin-Hebei region have increased by 2.59 meters and 7.06 meters for shallow and deep groundwater, respectively, since 2018 [5]. - The degree of desertification in typical desert areas has decreased, with a 12.9% reduction in the Yellow River "bending" area [5].