今年前三季度中国环境质量总体持续改善|国产亚洲精品久久777777黑寡妇
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中新社北京10月29日电 (记者 阮煜琳)中国生态环境部新闻发言人裴晓菲29日在北京举行的新闻发布会上表示,今年前三季度,中国环境空气质量和地表水环境质量总体持续改善。
在环境空气质量方面,全国339个地级及以上城市细颗粒物(PM2.5)平均浓度为26.0微克/立方米,同比下降5.1%;平均空气质量优良天数比例为87.6%,同比上升1.8个百分点;平均重度及以上污染天数比例为1.1%,同比持平。从重点区域来看,京津冀及周边地区“2+36”城市PM2.5平均浓度为33.0微克/立方米,同比下降15.6%;平均优良天数比例为73.5%,同比上升8.5个百分点。
在地表水环境质量方面,3641个国家地表水考核断面中,水质优良(Ⅰ—Ⅲ类)断面比例为89.0%,同比上升0.5个百分点;劣Ⅴ类断面比例为0.7%,同比持平。其中,长江、黄河、珠江、松花江、淮河、海河、辽河等七大流域及西北诸河、西南诸河和浙闽片河流水质优良(Ⅰ—Ⅲ类)断面比例为90.5%,同比上升0.5个百分点。监测的209个重点湖(库)中,水质优良(Ⅰ—Ⅲ类)湖库个数占比76.6%,同比下降2.0个百分点。(完)
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