生态环境部：11月下半月全国空气质量整体以优良至轻度污染为主

Core Viewpoint - The overall air quality in China during the second half of November 2025 is expected to be predominantly good to lightly polluted, influenced by multiple cold air masses, with specific regions experiencing moderate pollution levels due to local conditions such as dust storms and temperature variations [1]. Summary by Region Beijing-Tianjin-Hebei and Surrounding Areas - The air quality is expected to range from good to lightly polluted, with specific dates showing variations due to cold air influences and changing weather patterns [2]. - From November 16-17, the air quality is predicted to be good, while from November 25-27, conditions may worsen to lightly polluted due to a weakening pressure system [2]. Beijing - The air quality is anticipated to be predominantly good, with potential pollution events during cold air intermissions [3]. - Notable dates include November 22-23, where conditions may lead to light to moderate pollution due to increased humidity [3]. Yangtze River Delta - The air quality is expected to be lightly polluted in the northern part, with short-term moderate pollution possible, while the southern part remains predominantly good [4]. - Specific dates indicate varying conditions, with November 16 showing poor dispersion leading to light to moderate pollution in the northern region [4]. Fenwei Plain - The air quality is generally good, with potential for localized light pollution during cold air intermissions [5]. - The period from November 22-24 may see light pollution due to dust transmission from upstream sources [5]. Northeast Region - The air quality is expected to be predominantly good, with light to moderate pollution possible during warmer periods [6]. - Cold air activity is expected to maintain good dispersion conditions, particularly from November 16-21 [6]. South China - The air quality is expected to be predominantly good, with localized light to moderate pollution possible due to ozone and particulate matter [7]. - Specific dates indicate variations, with November 16 showing generally good conditions but localized pollution in certain areas [7]. Southwest Region - The air quality is expected to be good overall, with localized light pollution in the Chengdu-Chongqing area during certain periods [8]. - The influence of cold air and precipitation is expected to improve air quality towards the end of the month [8]. Northwest Region - The air quality is expected to be generally good, with potential light pollution due to dust storms on specific dates [8]. - The period from November 21-24 may see moderate pollution levels due to significant dust weather processes [8]. Xinjiang Region - The air quality is expected to be predominantly good, with localized light to moderate pollution in southern cities due to dust storms [8]. - Specific dates indicate potential for heavy pollution in certain areas during dust events [8].