生态环境部:上半年全国环境空气和地表水环境质量总体改善|精品国产人妻一区二区三区
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中新网北京7月28日电(记者 袁秀月)7月28日,记者从生态环境部7月例行新闻发布会上获悉,今年上半年,我国环境空气质量和地表水环境质量总体持续改善。

在发布会上,生态环境部新闻发言人裴晓菲介绍,今年上半年,全国339个地级及以上城市平均空气质量优良天数比例为83.8%,同比上升1.0个百分点;平均重度及以上污染天数比例为1.5%,同比持平。全国PM2.5平均浓度为32.1微克/立方米,同比下降2.4%;PM10平均浓度同比持平,为55微克/立方米。
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40.8微克/立方米,同比下降15.4%;平均优良天数比例为67.6%,同比上升9.9个百分点;平均重度及以上污染天数比例为1.2%,同比下降1.8个百分点。
长三角地区31个城市PM2.5平均浓度为37.4微克/立方米,同比下降4.3%;平均优良天数比例为76.9%,同比上升1.6个百分点;平均重度及以上污染天数比例为0.3%,同比下降0.5个百分点。汾渭平原13个城市PM2.5平均浓度为38.3微克/立方米,同比下降13.7%;平均优良天数比例为68.4%,同比上升7.1个百分点;平均重度及以上污染天数比例为2.9%,同比上升1.2个百分点。
在地表水环境质量方面,裴晓菲表示,今年上半年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0.2个百分点;劣Ⅴ类断面比例为1.0%,同比上升0.2个百分点。
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90.4%,同比上升0.1个百分点;劣Ⅴ类断面比例为0.8%,同比上升0.3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78.0%,同比下降1.5个百分点;劣Ⅴ类水质湖库个数占比3.8%,同比下降0.5个百分点。(完)
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