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PM2.5浓度同比下降约67% 北京去年12月空气全国十佳

2018-01-19 01:10:38   中国新闻网

资料图。中新社记者 侯宇 摄

北京入围去年12月空气最好前十名

当月优良天占83.9% PM2.5浓度同比下降约67%

北京晨报讯(记者 吴婷婷)昨天,环保部发布了2017年12月和1月至12月全国和京津冀等重点区域空气质量状况。去年全国PM2.5浓度43微克/立方米,北京入围上个月74个空气质量相对较好城市的前10名,位列第9。

上个月,全国338个地级及以上城市平均优良天数比例为66%,同比上升8.5个百分点。PM2.5浓度为65微克/立方米,同比下降16.7%;PM10浓度为103微克/立方米,同比下降12.7%。1月至12月,平均优良天数比例为78%,PM2.5浓度为43微克/立方米,PM10浓度为75微克/立方米。

去年12月,74个城市空气质量相对较好的前10名城市依次是:海口、张家口、福州、厦门、大连和舟山(并列)、拉萨、深圳、北京、昆明。1月至12月,前10名城市依次是:海口、拉萨、舟山、厦门、福州、惠州、深圳、丽水、贵阳和珠海。

环保部介绍,京津冀区域13个城市去年12月平均优良天数比例为64.6%,同比上升三成。PM2.5浓度为73微克/立方米,同比下降约五成;PM10浓度为119微克/立方米,同比下降约四成。1月至12月,平均优良天数比例为56%。PM2.5浓度为64微克/立方米,同比下降9.9%;PM10浓度为113微克/立方米,同比下降4.2%。

去年10月至12月,《京津冀及周边地区2017-2018年秋冬季大气污染综合治理攻坚行动方案》实施以来,PM2.5浓度削减幅度最大的前六位城市是石家庄、北京、廊坊、保定、鹤壁和安阳,与去年同期相比,PM2.5浓度削减幅度均在40%以上。

北京市12月优良天数比例为83.9%,同比上升四成。PM2.5浓度为44微克/立方米,同比下降约67%;PM10浓度为68微克/立方米,同比下降超过五成。1月至12月,平均优良天数比例为62.1%,同比上升6.9个百分点。PM2.5浓度为58微克/立方米,同比下降约两成;PM10浓度为84微克/立方米,同比下降5.6%。

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