呼和浩特市区污染状况分析

Analysis on Pollution Condition in Hohhot

文章利用呼和浩特市2006—2009年环境监测点监测的SO2、NO2和PM10平均浓度资料进行统计分析,得到:(1)呼和浩特市SO2日平均浓度在0.017～0.188mg·m-3之间,超标率为4.0%,NO2在0.026～0.081mg·m-3之间,未超过国家二级标准,PM10在0.036～0.332mg·m-3之间,超标率达到6.5%;(2)污染物浓度最小的月份是7月、8月,最大的月份是1月和12月;(3)近年呼和浩特污染物浓度总体呈下降趋势。

The mean concentration data of SO2.NO2 and PM10 of environmental monitoring sites were analyzed statistically in Hohhot city from 2006 to 2009. The results showed that daily mean concentration of S02 is between 0.017 and 0.188mg·m^-3, the superstandard rate is 4.0%, daily mean concentration of NO2 is between 0.026 and 0.081mg·m^-3, isn＇t more than national secondary standard, daily mean concentration of PM10 is between 0.036 and 0.332mg·m^-3, the superstandard rate is 6.5%, the pollutant concentration of June and August are minimum, January and December are maximum , the pollutant concentration of Hohhot showed a decreasing tendency in general in recent years.