Abstract
Six criteria pollutants were monitored in varied zones of Coimbatore City during a period of one year and correlated with the natural meteorological conditions such as temperature, relative humidity (RH), wind speed and precipitation using SPSS 23. The Spatial distribution analysis was determined by Inverse Distance Weighted (IDW) Interpolation Technique using ArcGIS 10.5. The interpolated values of the particulate matter (PM) i.e., PM <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</inf> (102-117 $\mu g/m^{3}$) and PM <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2.5</inf> (66-75 $\mu g/m^{3}$) showed a higher concentration in comparison with the permissible levels in 3 locations and Carbon monoxide (CO) in all the 5 locations. The Air Quality Index (AQI) in the different zones ranged between 77.04 to 151.01 indicating unhealthy condition. A significant impact of meteorological parameters in the air pollution distribution, showing positive correlation between the concentration of air pollutants and temperature (0.6- 0.8), wind speed and turbulence (0.1- 0.4) and a negative correlation with precipitation (-0.1 - -0.4) was found.
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