Status of air quality and its trend in gorakhpur city

In this study, an attempt has been made to determine the air quality of Lucknow city during the years (2015- 2022). Data on air pollutants (NO2, SO2, and PM10) has been analyzed from three monitoring sites which are operated by Madan Mohan Malaviya University of Technology (MMMUT), Gorakhpur. There are monitoring stations in residential, commercial, and industrial areas. The annual average concentrations of AQI for 2015 -2022 rangeexceeding the National Ambient Air Quality Standards for industrial, commercial, and residential areas. The annual averagevalue of the AQIexceeded in residential, commercial, and industrial areas respectively. However, AQIindicates distinct seasonality during winter months. The months of December and January demonstrate higher concentrations of AQI exhibiting the influence of winter inversion. These values distinctly exceed in winter, which is more than 3 times the national ambient air quality standard for residential areas. The paper also investigates the count of exceedances of national ambient air quality standards and briefly compares the results with previous air quality stutus to understand the comparative status of air quality in Gorakhpur city. The exceedance count of AQI is high with values above 100 for all the years and all sites.