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Kirikera, a small town in Andhra Pradesh, India (13.7690°N, 77.4841°E), is situated within the undulating terrain of the Deccan Plateau. Its elevation, relatively low-lying, contributes to limited natural dispersion of pollutants. The town’s geography is characterised by a mix of agricultural land – primarily paddy fields and small-scale farming – and increasingly, peri-urban development. Kirikera isn’t directly adjacent to major industrial belts, but benefits from, and is impacted by, the industrial activity concentrated around Hindupur to the north and Penukonda to the south. The Penneru River flows nearby, but its influence on local air quality is more related to irrigation practices and potential agricultural runoff than direct pollutant dilution. The urban-rural gradient is quite sharp; the town itself is compact, quickly giving way to agricultural landscapes. This proximity to agricultural practices introduces seasonal biomass burning, a significant contributor to particulate matter. The surrounding landscape, largely devoid of dense forests, offers minimal natural filtration of airborne pollutants. The prevailing winds, influenced by the monsoon patterns and regional topography, play a crucial role in pollutant transport and accumulation within the Kirikera basin, often leading to localised air quality issues. The town’s small size means pollution sources have a disproportionately large impact.

Kirikera experiences a distinct wet and dry season, heavily influencing its air quality. The dry season, from February to May, sees a significant deterioration in air quality. Higher temperatures and stagnant air masses create conditions for pollutant build-up, exacerbated by dust from agricultural activities and potential localised burning of crop residue. March and April are typically the worst months for respiratory issues. The onset of the southwest monsoon in June brings a temporary respite, with rainfall effectively washing away particulate matter and increasing atmospheric humidity. However, increased humidity can also foster mould growth, impacting indoor air quality. Post-monsoon (September-November) sees a moderate improvement, but the cooler temperatures can lead to temperature inversions, trapping pollutants near the ground. The winter months (December-January) can experience fog, further reducing visibility and exacerbating particulate matter concentrations. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit outdoor activity during the dry season and periods of fog. Monitoring local weather patterns and avoiding peak pollution times is crucial for maintaining respiratory health. The monsoon, while offering temporary relief, requires attention to indoor air quality due to increased humidity.