邵阳市环境空气质量月报

 邵阳市环境保护监测站                  2018年12月12期（总第12期） 

1、城市环境空气质量

2018年我市共有市化工厂、市罐头厂、市一中、市环保局和市水土所五个空气质量自动站监测点，均为空气质量日报点，其中市水土所作为对照点，不参与评价。按照《环境空气质量标准》（GB3095-2012）监测六个基本项目：二氧化硫、二氧化氮、可吸入颗粒物（PM₁₀）、细颗粒物（PM_2.5）、一氧化碳、臭氧。

⑴   各监测项目与上年同期、上月的情况比较

二氧化硫：全市月平均浓度为16μg/m³，较上年同期下降61.9％，与上月持平。

二氧化氮：全市月平均浓度为29μg/m³，较上年同期下降38.3％，较上月下降3.3％。

可吸入颗粒物（PM₁₀）：全市月平均浓度为68μg/m³,较上年同期下降47.3％,

 较上月上升11.5％。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

细颗粒物（PM_2.5）：全市月平均浓度为58μg/m³，较上年同期下降44.2％，较上月上升28.9％。

一氧化碳：全市日均值第95百分位浓度为1.7mg/m³，较上年同期下降5.6％，较上月上升30.8%。

臭氧*：全市日最大8小时平均第90百分位浓度为74μg/m³，较上年同期下降38.3％，较上月下降38.3%。

表1      2018年12月全市环境空气污染物浓度均值统计

备注：根据《环境空气质量评价技术规范（试行）》(HJ633-2013)，CO取城市日均值百分之95位数；臭氧取城市日最大8小时平均百分之90位数

（2）环境空气质量日报状况

本月我市空气质量自动站共发布环境空气质量日报31天。空气质量指数在20～228之间，达标天数比例为74.2%。轻度污染天数为5天，中度污染天数为1天，重度污染天数为2天，污染天数比例为25.8%。影响我市环境空气质量的超标污染物是细颗粒物（PM_2.5），污染天数中首要污染物是细颗粒物（PM_2.5）

与上月相比，本月优良天数比例为74.2％，比上月下降12.5％。

与上年同期相比，优良天数比例上升41.9％，优良天数增加13天，综合指数下降3.06，详见表2。

表2      2018年12月全市空气质量状况统计表

2、城市降水状况

我市降水设邵阳市监测站和泉塘冲两个测点。本月市监测站测点降水pH范围为4.75～5.25， pH 月均值为4.93；本月酸性降雨频率为100％。泉塘冲测点降水pH范围为5.46～5.89，pH 月均值为5.57；本月酸性降雨频率为40％。详见表3。

表3      2018年12月全市降水监测结果统计表

备注

  根据湖南省环保厅下发的《湘环函［2016］213号》文，邵阳市环保局2018年1月11日下发的《关于将水、环境空气质量报表分开编辑、出刊、上报的通知》，经请示湖南省环境监测中心站同意后，对《邵阳市环境质量月报》进行改版，分为《邵阳市环境空气质量月报》和《邵阳市水环境质量月报》。《邵阳市环境质量月报》从1985年开始编辑发出，截止2017年12月共发出388期。