来源:北方网 | 2022-04-19 13:51:24 |
天津北方网讯:昨日,市生态环境局发布了3月份环境空气质量状况。3月份,我市环境空气质量综合指数4.49,同比下降22.2%;达标天数25天,同比增加13天;达标比例为80.6%,同比上升41.9个百分点;无重污染天气,同比减少3天。PM2.5、PM10、NO2和CO浓度同比下降,降幅分别为33.3%、22.6%、21.3%和7.7%;SO2和O3浓度同比持平。
据了解,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,3月排名较好的区为蓟州区、宁河区和武清区,较差的区为静海区、河北区和津南区。(津云新闻编辑刘颖)
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