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Vaddāpalli, a small town in the Kurnool district of Andhra Pradesh, India, sits at coordinates 18.5323°N, 77.8959°E. The terrain is largely characterised by undulating plains typical of the Deccan Plateau, with a gentle slope towards the east. The town’s elevation is relatively low, contributing to limited atmospheric dispersion of pollutants. Vaddāpalli is not directly adjacent to a major body of water, though the Tungabhadra River flows within a reasonable distance, influencing local humidity. The surrounding landscape is predominantly agricultural, with significant cultivation of cotton, groundnuts, and pulses. This agricultural activity, while vital to the local economy, introduces potential sources of particulate matter through dust from tilling and harvesting, as well as emissions from agricultural burning. While not a major industrial hub itself, Vaddāpalli’s proximity to larger industrial areas in Kurnool district means it can experience transboundary pollution. The urban-rural gradient is pronounced; the town itself is compact, surrounded by extensive rural farmland. This proximity means that air quality is heavily influenced by both local activities and regional meteorological patterns. The lack of substantial green cover within the town limits further exacerbates the potential for pollutant build-up, limiting natural air purification processes. The town’s small size and limited infrastructure contribute to localised pollution hotspots, particularly along major roadways.

Vaddāpalli experiences a tropical climate with distinct wet and dry seasons. Air quality generally deteriorates during the dry season, from November to May. The winter months (November-February) often see temperature inversions, trapping pollutants near the ground, particularly from biomass burning for warmth and cooking. Dust from agricultural activities also contributes to higher particulate matter levels during this period. March and April are typically the worst months for air quality, preceding the monsoon. The arrival of the southwest monsoon in June brings a temporary respite, as rainfall washes away pollutants and increases humidity, suppressing dust. However, increased cloud cover can also exacerbate temperature inversions. The monsoon season (June-September) generally offers the cleanest air, though localised flooding can disrupt drainage and contribute to stagnant water, potentially fostering mosquito-borne diseases. Post-monsoon (October-November) sees a gradual return to drier conditions and a corresponding increase in dust and agricultural burning, leading to a decline in air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, particularly in March and April. Wearing masks and avoiding peak traffic hours are recommended.