Assessment of Air Quality using Air Quality Indices for a Roadway Passing Through Commercial Area in Mysuru City

Air Quality Indices (AQI) are used for local and regional air quality management in many cities of the world. The present study signifies about the air pollutant concentrations for a roadway passing through commercial area in Mysuru city. Sulphur dioxide (SO2), nitrogen dioxide (NO2) and particulate matter10 (PM10) were collected over two sampling locations along the roadway. Simultaneously during the sampling period meteorological parameters like temperature, pressure, relative humidity, wind speed, wind direction and rainfall data were also collected and windroses were plotted. Monthly and seasonal variations of these pollutants have been observed and recorded and AQIs were calculated. It has been observed that the AQI’s are high in winter season in comparison to the summer season. In the present study it is noticed that the PM10 levels at both the locations exceed the prescribed limits as stipulated by CPCB.