• Smita
• Subroto Dutta
• Pawan Kumar

In presents study, the ambient air quality along with variation in the concentration of gaseous and particulate matter such as PM10, PM2.5, SO2 and NO2 at Shastri Nagar, Narnaul city, Mahendragarh observed during the year 2023-2024 and compared with NAAQS. The data shows the concentration of SO2 and NO2 were always below the permissible limits of CPCB; and the mass concentration for PM10 and PM2.5 crosses the permissible limit with particulate matter concentration maximum in post monsoon i.e. Nov & minimum during monsoon season. As the AQI increases, large percentage of the population is likely to experience increasingly severe adverse health effects. In the study, Air Quality Index clearly depicts the changes in different meteorological season in 2023 and 2024. The study shows the air quality was very poor during winter month and satisfactory during monsoon season due to washout and rain out of pollutants.

Keywords: Air pollution, AQI, CPCB, WHO, particulate matter, PM10, PM2.5, SO2 and NO2

"AIR QUALITY INDEX OF MAHENDRAGARH DISTRICT, HARYANA, INDIA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 8, page no.e189-e196, August-2025, Available :http://www.jetir.org/papers/JETIR2508426.pdf

"AIR QUALITY INDEX OF MAHENDRAGARH DISTRICT, HARYANA, INDIA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 8, page no. ppe189-e196, August-2025, Available at : http://www.jetir.org/papers/JETIR2508426.pdf