中新网3月28日电 据环保部网站消息，环境保护部有关负责人今日向媒体通报，3月27日夜间开始，北京等地出现降水过程，受其影响，28日我国京津冀及周边地区空气质量得到明显改善。
这位负责人说，3月27日，京津冀及周边地区开展空气质量新标准监测的39个城市中，有13个城市出现重度及以上污染，较26日减少10个。其中，北京、邢台、唐山等11个城市空气质量属重度污染，石家庄、鄂尔多斯2个城市属严重污染。鄂尔多斯和威海空气质量由良恶化为严重污染和重度污染；呼和浩特、包头和烟台由轻度污染下降为重度污染；济南、淄博、邯郸、沧州、枣庄等15个城市由重度及以上污染减轻至良至中度污染。石家庄市为区域内污染最重城市，AQI值为323，空气质量为严重污染。北京市AQI值为285，空气质量为重度污染。
截至3月28日10:00，京津冀及周边地区39个城市中，有7个城市PM2.5小时平均浓度大于150微克/立方米，空气质量属重度及以上污染，其中邢台市PM2.5小时平均浓度大于250微克/立方米，属严重污染。北京市PM2.5小时平均浓度为151微克/立方米，与27日同期相比PM2.5浓度明显下降，空气质量明显改善。
这位负责人表示，29日京津冀大部分地区大气扩散条件好转，北京和河北北部以优良为主，天津和河北中南部以良至轻度污染为主。30日河北北部以优良为主，北京和天津以良至轻度污染为主，河北中南部以轻至中度污染为主。
(原标题：环保部：京津冀空气质量明显改善 周末优良为主)
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