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Kottá Kalidindi, nestled in Andhra Pradesh, India, occupies a geographically significant position within the Krishna River delta, a region characterized by fertile alluvial plains and a gradual urban–rural gradient. Located at approximately 16.5032° N, 81.2877° E, the town sits at a relatively low elevation, averaging around 25 meters above sea level, contributing to a generally flat terrain. This low elevation, coupled with its proximity to the Krishna River, influences local weather patterns and can exacerbate air quality issues under certain conditions. The surrounding landscape is predominantly agricultural, with rice paddies and other crops dominating the rural areas extending outwards from Kottá Kalidindi. This agricultural activity, while vital to the regional economy, can contribute to seasonal particulate matter pollution, particularly from crop burning practices. To the west, the landscape gradually transitions to more undulating terrain. The town’s regional position places it within a zone experiencing moderate industrial development, with smaller manufacturing units and processing facilities scattered throughout the district. While not a major industrial hub, these localized industries contribute to emissions. The deltaic environment also means the town is susceptible to flooding during the monsoon season, which can temporarily redistribute pollutants. The urban character of Kottá Kalidindi is that of a developing town, with a mix of traditional dwellings and newer constructions, and a growing population density impacting local air quality through increased vehicular traffic and domestic emissions.

Kottá Kalidindi’s air quality experiences a distinct seasonal cycle dictated by the region’s tropical climate and monsoon patterns. The dry season, typically spanning from March to May, often witnesses a noticeable increase in particulate matter. This is largely attributable to increased dust levels due to higher temperatures and drier conditions, combined with agricultural practices like crop residue burning after the harvest season. Temperature inversions, common during these months, trap pollutants close to the ground, worsening the situation. The monsoon season, from June to September, brings relief as rainfall washes away pollutants and strong winds disperse them. However, heavy rainfall can also lead to localized flooding, temporarily impacting air quality due to resuspended sediments. October and November mark a transitional period, with decreasing rainfall and gradually increasing temperatures, potentially leading to a resurgence of particulate matter. The winter months (December to February) are generally characterized by cooler temperatures and calmer winds, which can occasionally lead to stagnant air and localized pollution episodes, especially if fog develops. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season and be mindful of potential fog events in winter. Outdoor activities are generally more favourable during the monsoon months, but awareness of potential flooding impacts is crucial. Minimizing exposure to dust and smoke during peak agricultural burning periods is strongly advised.