来源:北方网 | 2022-02-09 10:45:09 |
天津北方网讯:日前,市生态环境局公布了去年12月份我市及各区环境空气质量状况。去年12月,我市环境空气质量综合指数4.88,同比下降2.8%;优良天数23天,同比增加2天;优良天数比率74.2%,同比上升6.5个百分点;重污染天数1天,同比增加1天;PM2.5、NO2、CO和O3浓度同比下降,降幅分别为5.7%、5.6%、30.0%和5.1%。
去年12月,各区PM2.5浓度在29至65μg/m3之间,优良天数比率在64.5%至93.5%之间。按照PM2.5浓度、PM2.5改善率和优良天数比率排名位次数值各占30%、30%和40%的权重进行排名,去年12月排名较好的区为宁河区、武清区和蓟州区,较差的区为静海区、和平区和河北区。(津云新闻编辑刘颖)
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