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Pendurti, a rapidly urbanising locality within the Visakhapatnam Metropolitan Region of Andhra Pradesh, India, occupies a relatively low-lying coastal plain. Situated at coordinates 17.8278°N, 83.2022°E, its terrain is generally flat, gently sloping towards the Bay of Bengal, approximately 15-20 kilometers east. This proximity to the coast influences local weather patterns and contributes to humidity levels. The surrounding landscape is a mix of agricultural land – primarily paddy fields – and increasingly, residential and industrial development linked to Visakhapatnam’s growth. Pendurti’s air quality is significantly impacted by its position downwind of the major industrial belt of Visakhapatnam city, including steel plants, refineries, and port activities. The urban-rural gradient is steepening as the city expands, with agricultural areas being converted into housing and commercial zones. This land-use change contributes to dust pollution during construction and increased vehicular emissions. The lack of substantial natural barriers, like hills, allows pollutants to disperse, but also means Pendurti is vulnerable to air masses carrying pollutants from the wider Visakhapatnam area. The local topography doesn’t promote strong air circulation, potentially exacerbating pollution episodes. Understanding this geographic context is crucial for addressing Pendurti’s air quality challenges.

Pendurti experiences a tropical climate, with distinct wet and dry seasons heavily influencing air quality. The post-monsoon and winter months (October to February) often see the poorest air quality. Cooler temperatures lead to temperature inversions, trapping pollutants near the ground, compounded by reduced wind speeds. This period coincides with increased burning of agricultural residue after the harvest, adding to particulate matter. The pre-monsoon months (March to May) bring rising temperatures and dry winds, stirring up dust from construction sites and unpaved roads, further degrading air quality. The southwest monsoon (June to September) provides a temporary respite, with rainfall washing away pollutants and increased wind speeds dispersing them. However, increased humidity can also promote the formation of secondary pollutants. Outdoor activity is best suited during the monsoon season, though caution is advised regarding waterborne diseases. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exposure during October-February and March-May. Monitoring wind direction is vital; pollutants from Visakhapatnam are most concentrated when winds blow from the northwest. Consistent monitoring and public health advisories are essential to mitigate seasonal air quality fluctuations.