本报电(记者刘发为)记者日前从生态环境部获悉，2025年，中国环境空气质量和地表水环境质量持续改 善。 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37.3微克/立方米，同比下降11.6%； 平均优良天数比例为73.8%，同比上升5.5个百分点。长三角地区31个城市PM2.5平均浓度为31.7微克/立 方米，同比下降3.9%；平均优良天数比例为82.7%，同比上升0.6个百分点。汾渭平原13个城市PM2.5平 均浓度为33.7微克/立方米，同比下降14.9%；平均优良天数比例为77.5%，同比上升7.0个百分点。 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28.0微克/立方米，同比下降4.4%； PM10平均浓度为48微克/立方米，同比下降2.0%。平均空气质量优良天数比例为89.3%(扣除沙尘异常超 标天后)，同比上升1.9个百分点；平均重度及以上污染天数比例为0.9%，同比持平。 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91.4%，同比 上升1.0个百分点。其中，长江、黄河、珠江、松花江、淮河、海河、辽河等七大流域 ...

Group 1 - The average PM2.5 concentration in Beijing for the first 11 months of 2025 was 26.5 micrograms per cubic meter, a year-on-year decrease of 16.7%, marking the best historical level for the same period since monitoring began [1] - The number of days with good air quality reached 282, an increase of 23 days compared to the previous year [1] - Beijing's ecological environment bureau reported significant progress in the "0.1 microgram" action plan, focusing on structural, engineering, and management emission reductions [1] Group 2 - The number of new green enterprises in Beijing increased by 1,090, raising the proportion of green enterprises to 37.5% [2] - The city exceeded its clean heating transformation targets, completing deep governance for 1,060 steam tons of gas boilers [2] - The average road dust load in the city decreased by 18.6% year-on-year, with the promotion of fully enclosed construction techniques for foundation pits [2] Group 3 - The ecological environment bureau plans to enhance air quality forecasting and focus on key areas and links to ensure the successful completion of the "14th Five-Year Plan" and the blue sky defense battle action plan by 2025 [2]