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Case Report Open Access
Local topography plays a very important role in the dispersal of pollutants. It is worth mentioning here that a coastal station, Visakhapatnam recorded very high concentrations in April in spite of higher mixing, which is because of its basin-like topographical structure confined by two ranges of hills. In this article an attempt is made to calculate the morning (minimum) mixing heights for winter, pre-monsoon, monsoon and post-monsoon seasons. In this study a comparison is made within the pollutants (SPM, SO2, and NOx) concentrations. February recorded peak concentration and April recorded minimum value. If a comparison is made as season wise winter season recorded maximum concentrations and followed by post monsoon season, summer season respectively. In this article we observed that the maximum concentrations are occurring within a distance of 100 m.