Analysis of Air Quality in Shijiazhuang in 2014-2018

The environmental air quality monitoring data of Shijiazhuang from 2014 to 2018 was selected to analyze the change trend of the air quality.The results showed that the air quality situation was beyond optimism.By the end of 2018,the annual average concentration of PM_2.5,PM₁₀,NO₂ and O₃ exceeded the national secondary standard concentration limits by 105.7%,85.7%,20.0% and 31.9% respectively.Overall,the pollution situation of PM_2.5 and PM10 has been improved.The annual average concentration of pollutants and the number of days exceeding the standard have shown a downward trend.However,the problem of exceeding the standard was still serious.PM_2.5 and PM₁₀ were the targets of environmental air quality in Shijiazhuang,which would be the future research focus.At the same time,the O₃ concentration has increased significantly in recent years,and the number of days of the primary pollutant has also increased significantly,which should be taken seriously.