中国生态环境部于2026年10月26日在北京公布了全国及重点区域2026年前三季度（1月至9月）的空气质量监测数据 1。统计显示，全国339个地级及以上城市的PM2.5平均浓度为每立方米24.9微克，同比下降3.9%；同时，全国平均空气质量优良天数比例达到86.6%，较去年同期上升了2.8个百分点 1。
尽管全国整体空气状况有所改善，但京津冀及周边地区“2+36城市”的污染情况却出现反弹。该区域PM2.5平均浓度高达每立方米37.0微克，比去年同期升高12.1%，表明当地空气污染未得到有效遏制 1。相比之下，长三角地区31个城市的PM2.5平均浓度为每立方米28.0微克，实现了5.4%的年降幅 1。
China’s Ministry of Ecology and Environment released national air quality monitoring data for the first three quarters of 2026 on October 26, 2026, in Beijing. 1 The statistics indicate a general improvement across the country, with the average PM2.5 concentration in 339 prefecture-level and above cities dropping to 24.9 micrograms per cubic meter, representing a year-on-year decrease of 3.9%. 1 Additionally, the proportion of days rated as excellent or good nationwide rose by 2.8 percentage points to reach 86.6%. 1
Despite these national gains, air pollution worsened significantly in the Beijing-Tianjin-Hebei region and its surrounding areas. The "2+36" city cluster in this zone recorded an average PM2.5 concentration of 37.0 micrograms per cubic meter, which is 12.1% higher than the same period last year. 1 In contrast, the Yangtze River Delta region demonstrated positive trends, where the 31 monitored cities saw their average PM2.5 levels fall by 5.4% to 28.0 micrograms per cubic meter. 1
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