RT - 杂志 - Jour YR - 19-06-2020 JF - 当前世界环境Jo - Sp - Op - Vo - 67是 - 70 ul - www.a-i-l-s-a.com/article/1198/ Do - 10.12944 / CWe.15.2。11 N2 - 糟糕的空气是今天大多数城市中心的关键问题之一，而Siliguri则不例外。为了评估硅藻土的空气质量，基于污染物的平均年度浓度施加超过因子（EF）方法;No2，SO2，PM2.5和PM10，发现PM2.5和PM10是对城市产生严重威胁的主要污染物。在施加EF方法后，发现PM2.5的值在中度至高污染水平和PM10之间，它在高到临界污染水平下降。另一方面，NO 2和SO2的浓度下降到中度至低污染水平。通过对各种污染物的趋势分析，发现它们的浓度在自然界中变化。在PM10的情况下，该趋势显示出超过国家标准的高浓度;如果没有检查，PM2.5临近靠近违反国家标准的浓度。相比之下，NO2和SO2的趋势被记录低于国家标准。基于空气质量指标分析了硅藻土环境空气的现状，揭示了城市的空气质量可以分为两个赛季，即清洁空中时期（从4月至10月）和污染期（从11月到3月）。 Lastly, the annual trends of PM2.5 and PM10 were constructed as they are the major pollutants, and it shows their skewed nature during winter months which results in smog episodes. It unveils how critical the situation of air quality of Siliguri became especially during winter months which seek immediate attention. Thus the study tries to present a vivid scenario about the present air quality of Siliguri, which concludes with some of the suggestions to restrain the air quality. ER -