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前8月北京PM2.5同比下降4.8%
2017-09-20 07:32:23 中国经济网
本报讯(记者 骆倩雯)昨天,环保部发布了今年8月和前8个月全国和京津冀、长三角、珠三角区域及直辖市、省会城市、计划单列市空气质量状况。今年前8个月,北京PM2.5浓度降至60微克/立方米,同比下降4.8%。
环保部环境监测司司长刘志全介绍,京津冀区域13个城市8月平均优良天数比例为67.5%,同比下降16.1%;PM2.5浓度为39微克/立方米,同比上升5.4%;PM10浓度为69微克/立方米,同比上升9.5%。1月至8月,平均优良天数比例为52.8%,同比下降8%;PM2.5浓度为65微克/立方米,同比上升10.2%;PM10浓度为115微克/立方米,同比上升10.6%。
具体到北京市,8月优良天数比例为74.2%,同比上升19.4%;PM2.5浓度为38微克/立方米,同比下降19.1%;1月至8月,平均优良天数比例为56.0%,PM2.5浓度为60微克/立方米,同比下降4.8%。
今年3月开始,本市PM2.5浓度屡创新低。到7月底的时候,全市PM2.5累计浓度为64微克/立方米,达到近五年同期最低,加上刚刚过去的8月,PM2.5浓度再次降至60微克/立方米。
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