Core Viewpoint - The air quality and surface water quality in China have shown overall improvement in the first three quarters of this year, with significant reductions in pollutant concentrations and increases in the proportion of days with good air quality [1][5]. Air Quality Summary - The average PM2.5 concentration across 339 cities is 26.0 micrograms per cubic meter, a year-on-year decrease of 5.1% - The average PM10 concentration is 45 micrograms per cubic meter, down 4.3% year-on-year - The proportion of days with good air quality is 87.6%, an increase of 1.8 percentage points year-on-year - The proportion of days with heavy pollution or worse is 1.1%, unchanged from the previous year [5]. Key Regions - In the Beijing-Tianjin-Hebei region, the average PM2.5 concentration is 33.0 micrograms per cubic meter, a decrease of 15.6% year-on-year - The proportion of good air quality days is 73.5%, up 8.5 percentage points year-on-year - The proportion of heavy pollution days is 0.8%, down 1.2 percentage points year-on-year - In the Yangtze River Delta, the average PM2.5 concentration is 29.6 micrograms per cubic meter, a decrease of 6.3% year-on-year - The proportion of good air quality days is 81.6%, up 2.4 percentage points year-on-year - The proportion of heavy pollution days is 0.2%, down 0.4 percentage points year-on-year - In the Fenwei Plain, the average PM2.5 concentration is 30.9 micrograms per cubic meter, a decrease of 16.5% year-on-year - The proportion of good air quality days is 75.3%, up 9.4 percentage points year-on-year - The proportion of heavy pollution days is 2.0%, up 0.9 percentage points year-on-year [5]. Surface Water Quality Summary - Among 3,641 national surface water monitoring sections, the proportion of good water quality (Class I-III) is 89.0%, an increase of 0.5 percentage points year-on-year - The proportion of poor water quality (Class V or worse) is 0.7%, unchanged from the previous year - In major river basins, the proportion of good water quality sections is 90.5%, an increase of 0.5 percentage points year-on-year - The proportion of poor water quality sections is 0.5%, an increase of 0.1 percentage points year-on-year - Among 209 monitored key lakes and reservoirs, the proportion of good water quality lakes is 76.6%, a decrease of 2.0 percentage points year-on-year - The proportion of poor water quality lakes is 3.8%, a decrease of 0.5 percentage points year-on-year [6].

Core Insights - The overall air quality and surface water quality in China have shown continuous improvement in the first three quarters of this year [1] Air Quality Summary - The average PM2.5 concentration in 339 cities was 26.0 micrograms per cubic meter, a year-on-year decrease of 5.1% [1] - The average PM10 concentration was 45 micrograms per cubic meter, a year-on-year decrease of 4.3% [1] - The proportion of days with good air quality was 87.6%, an increase of 1.8 percentage points year-on-year [1] - The proportion of days with heavy pollution or worse was 1.1%, unchanged year-on-year [1] - In the Beijing-Tianjin-Hebei region, the average PM2.5 concentration was 33.0 micrograms per cubic meter, a year-on-year decrease of 15.6% [1] - The proportion of good air quality days in this region was 73.5%, an increase of 8.5 percentage points year-on-year [1] - In the Yangtze River Delta, PM2.5 concentration decreased by 6.3% year-on-year, with good air quality days increasing by 2.4 percentage points [1] - In the Fenwei Plain, PM2.5 concentration decreased by 16.5% year-on-year, with good air quality days increasing by 9.4 percentage points [1] Water Quality Summary - Among 3,641 national surface water monitoring sections, the proportion of sections with good water quality (Class I to III) was 89.0%, an increase of 0.5 percentage points year-on-year [1] - The proportion of sections classified as worse than Class V was 0.7%, unchanged year-on-year [1] - In major river basins, the proportion of sections with good water quality was 90.5%, an increase of 0.5 percentage points year-on-year [2] - The proportion of sections classified as worse than Class V in these basins was 0.5%, an increase of 0.1 percentage points [2] - Among 209 monitored key lakes and reservoirs, 76.6% had good water quality, while 3.8% were classified as worse than Class V [2]

Core Insights - The Ministry of Ecology and Environment reported continuous improvement in air and surface water quality in China during the first three quarters of the year [1][2] Air Quality Summary - The average PM2.5 concentration in 339 cities was 26 micrograms per cubic meter, a year-on-year decrease of 5.1% [1] - The average PM10 concentration was 45 micrograms per cubic meter, down 4.3% year-on-year [1] - The proportion of days with good air quality was 87.6%, an increase of 1.8 percentage points year-on-year [1] - The proportion of days with heavy pollution was 1.1%, unchanged from the previous year [1] - In the Beijing-Tianjin-Hebei region, the average PM2.5 concentration was 33 micrograms per cubic meter, a decrease of 15.6% year-on-year [1] - The proportion of good air quality days in this region was 73.5%, up 8.5 percentage points year-on-year [1] - The Yangtze River Delta region reported an average PM2.5 concentration of 29.6 micrograms per cubic meter, down 6.3% year-on-year [1] Surface Water Quality Summary - Among 3,641 national surface water monitoring sections, 89% were rated as good quality (Class I-III), an increase of 0.5 percentage points year-on-year [2] - The proportion of poor quality (Class V) sections was 0.7%, unchanged from the previous year [2] - In major river basins, 90.5% of monitoring sections were rated as good quality, an increase of 0.5 percentage points year-on-year [2] - The proportion of poor quality sections in these basins was 0.5%, up 0.1 percentage points year-on-year [2] - Among 209 key lakes and reservoirs monitored, 76.6% were rated as good quality, a decrease of 2.0 percentage points year-on-year [2] - The proportion of poor quality lakes and reservoirs was 3.8%, down 0.5 percentage points year-on-year [2]

在环境空气质量方面，全国339个地级及以上城市PM2.5平均浓度为26.0微克/立方米，同比下降 5.1%；PM10平均浓度为45微克/立方米，同比下降4.3%。平均空气质量优良天数比例为87.6%，同比上 升1.8个百分点；平均重度及以上污染天数比例为1.1%，同比持平。 从重点区域来看，京津冀及周边地区"2+36"城市PM2.5平均浓度为33.0微克/立方米，同比下降 15.6%；平均优良天数比例为73.5%，同比上升8.5个百分点；平均重度及以上污染天数比例为0.8%，同 比下降1.2个百分点。长三角地区31个城市PM2.5平均浓度为29.6微克/立方米，同比下降6.3%；平均优 良天数比例为81.6%，同比上升2.4个百分点；平均重度及以上污染天数比例为0.2%，同比下降0.4个百 分点。汾渭平原13个城市PM2.5平均浓度为30.9微克/立方米，同比下降16.5%；平均优良天数比例为 75.3%，同比上升9.4个百分点；平均重度及以上污染天数比例为2.0%，同比上升0.9个百分点。 在地表水环境质量方面，3641个国家地表水考核断面中，水质优良（Ⅰ—Ⅲ类）断面比例为 89.0%，同比上升0.5个百分 ...

Group 1 - The overall environmental quality in China has continued to improve in the first three quarters of this year, particularly in air and surface water quality [1][2] - The average concentration of PM2.5 in 339 cities was 26.0 micrograms per cubic meter, a year-on-year decrease of 5.1% [1] - The proportion of days with good air quality increased to 87.6%, up by 1.8 percentage points year-on-year, while the proportion of days with heavy pollution remained stable at 1.1% [1] Group 2 - Among 3,641 national surface water monitoring sections, 89.0% were rated as good quality (Class I-III), an increase of 0.5 percentage points year-on-year [2] - The proportion of Class V or worse water quality sections remained stable at 0.7% [2] - In major river basins, including the Yangtze, Yellow, and Pearl Rivers, the proportion of good quality sections was 90.5%, also up by 0.5 percentage points year-on-year [2]

Air Quality Improvement - The average PM2.5 concentration in 339 cities is 26 micrograms per cubic meter, a year-on-year decrease of 5.1% [1] - The average PM10 concentration is 45 micrograms per cubic meter, a year-on-year decrease of 4.3% [1] - The proportion of days with good air quality is 87.6%, an increase of 1.8 percentage points year-on-year [1] Regional Air Quality - In the Beijing-Tianjin-Hebei region, the proportion of good air quality days increased by 8.5 percentage points, while the proportion of heavily polluted days decreased by 1.2 percentage points [3] - Significant improvements in air quality were observed in key areas such as the Yangtze River Delta and Fenwei Plain [3] Surface Water Quality - Among 3,641 national surface water assessment sections, 89% are classified as good quality (Class I-III), an increase of 0.5 percentage points year-on-year [5] - The seven major river basins, including the Yangtze and Yellow Rivers, show continuous improvement in water quality, with 90.5% of sections classified as good quality, also an increase of 0.5 percentage points year-on-year [5]

Water Quality - The overall water quality rate for the 345 national and provincial monitoring points in the province reached 99.7%, an increase of 0.3 percentage points year-on-year [1] - Among the monitoring points, 49 were classified as Class I (14.2%), 198 as Class II (57.4%), 97 as Class III (28.1%), and 1 as Class IV (0.3%) [1] - The average concentrations of ammonia nitrogen, chemical oxygen demand, and total phosphorus decreased to 0.117 mg/L, 9.82 mg/L, and 0.058 mg/L, representing year-on-year declines of 3.45%, 0.22%, and 2.08% respectively [1] Air Quality - The average PM2.5 concentration in the province was 26.8 µg/m³, a year-on-year decrease of 6.6%, with a good air quality day rate of 88.4%, up by 1.6 percentage points [2] - Significant differences in PM2.5 concentration improvements were observed among 21 cities, with notable reductions in Zigong (20.4%), Ya'an (17.9%), and Yibin (15%), while increases were seen in Aba Prefecture (23.5%), Deyang (5.4%), and Guang'an (3.4%) [2] - The best air quality was reported in specific counties such as Baoxing County in Ya'an, Pingwu County in Mianyang, and others, while declines were noted in Suining, Guangyuan, and Bazhong [2]

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]