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环保部:今年1-7月全国平均优良天数比例同比下降3.2%

2017-08-16 15:45:54   中国青年网

环保部发布微信公号8月16日消息:环境保护部今天向媒体发布了2017年7月和1-7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。

环境保护部环境监测司司长刘志全介绍,7月,全国338个地级及以上城市平均优良天数比例为82.5%,同比下降6.3个百分点。PM2.5浓度为27微克/立方米,同比下降6.9%;PM10浓度为53微克/立方米,同比上升3.9%。1-7月,平均优良天数比例为76.6%,同比下降3.2个百分点。 PM2.5浓度为45微克/立方米,同比持平;PM10浓度为78微克/立方米,同比持平。

7月,74个城市空气质量相对较差的后10位城市(从第74名到第65名)依次是:唐山、邢台、石家庄、邯郸、太原、济南、保定、廊坊、衡水和天津市。1-7月,后10位城市依次是:邯郸、石家庄、邢台、保定、唐山、太原、郑州、衡水、西安和济南市。

7月,74个城市空气质量相对较好的前10位城市(从第1名到第10名)依次是:海口、厦门、拉萨、珠海、惠州、深圳、舟山、台州、丽水和贵阳市。1-7月,前10位城市依次是:海口、拉萨、珠海、惠州、舟山、深圳、丽水、厦门、福州和贵阳市。

京津冀区域 13个城市7月平均优良天数比例为50.4%,同比下降4.9个百分点。PM2.5浓度为50微克/立方米,同比下降13.8%;PM10浓度为82微克/立方米,同比下降4.7%。1-7月,平均优良天数比例为50.6%,同比下降6.8个百分点。PM2.5浓度为69微克/立方米,同比上升11.3%;PM10浓度为121微克/立方米,同比上升10.0%。

北京市 7月优良天数比例为41.9%,同比上升6.4个百分点,PM2.5浓度为52微克/立方米,同比下降24.6%;PM10浓度为71微克/立方米,同比持平。1-7月,平均优良天数比例为53.3%,同比下降4.0个百分点。PM2.5浓度为64微克/立方米,同比下降1.5%;PM10浓度为92微克/立方米,同比上升13.6%。

长三角区域 25个城市7月平均优良天数比例为76.0%,同比下降2.7个百分点。PM2.5浓度为28微克/立方米,同比下降9.7%;PM10浓度为50微克/立方米,同比下降2.0%。1-7月,平均优良天数比例为71.3%,同比下降2.8个百分点。PM2.5浓度为45微克/立方米,同比下降10.0%;PM10浓度为73微克/立方米,同比下降9.9%。

珠三角区域 9个城市7月平均优良天数比例为87.4%,同比上升2.5个百分点。PM2.5、PM10浓度分别为19微克/立方米、32微克/立方米,均达到国家二级年均浓度标准。1-7月,平均优良天数比例为88.3%,同比下降5.0个百分点。PM2.5、PM10浓度分别为33微克/立方米、51微克/立方米,均达到国家二级年均浓度标准。

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