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Āgiripalle, nestled in the Prakasam district of Andhra Pradesh, India, occupies a geographically significant position within the Krishna-Godavari plains. Located at approximately 16.68°N, 80.65°E, the town’s terrain is predominantly flat, characteristic of the fertile alluvial landscape formed by the Krishna River and its tributaries. The elevation is relatively low, hovering around 30 meters above sea level, contributing to a tendency for pollutants to accumulate, particularly during periods of low wind speed. Āgiripalle’s proximity to the Bay of Bengal, roughly 150 kilometers to the east, influences local weather patterns and can occasionally introduce marine aerosols into the air. The surrounding landscape is a mosaic of agricultural fields – predominantly rice and groundnut cultivation – interspersed with smaller villages and pockets of scrubland. This agricultural activity, while vital to the regional economy, can contribute to air pollution through the burning of crop residue after harvest, a common practice in the region. The urban–rural gradient around Āgiripalle is gradual; the town itself is a small, primarily agrarian settlement, with limited industrial presence. However, it lies within a broader agricultural belt that extends towards Guntur and Vijayawada, and is increasingly connected to these larger urban centers via road networks, potentially increasing vehicular emissions. The flat topography and limited natural barriers mean that pollutants from these connected areas can readily impact Āgiripalle’s air quality, especially during stagnant atmospheric conditions.

Āgiripalle’s air quality follows a distinct seasonal pattern dictated by the region’s tropical climate and the influence of the Indian monsoon. The dry season, typically spanning from March to May, is often characterized by elevated particulate matter concentrations. This is largely due to the prevalence of crop residue burning following the harvest of rabi crops (winter crops), combined with increased dust from agricultural activities and construction. Temperature inversions, common during these months, trap pollutants close to the ground, exacerbating the problem. The monsoon season, from June to September, brings significant relief as rainfall washes away pollutants and strong winds disperse them. However, the onset of the monsoon can initially be accompanied by increased humidity and fog, which can temporarily reduce visibility and trap pollutants. October and November represent a transitional period, with decreasing rainfall and gradually increasing temperatures, often leading to a resurgence of particulate matter. December and January are generally cooler and drier, with relatively better air quality compared to the peak of the dry season, although fog events can still occur. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of crop residue burning. Limiting outdoor exertion and wearing masks can help mitigate exposure. During the monsoon, while air quality generally improves, those with allergies should be mindful of increased pollen counts and humidity.