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Tuminkatti, a small town in Karnataka, India, rests at coordinates 14.4131°N, 75.6206°E, nestled within the undulating terrain of the Western Ghats foothills. With a population of approximately 20,000, it represents a crucial node in the rural-urban gradient of the region, serving as a market and service centre for surrounding agricultural communities. The landscape is predominantly characterised by paddy fields, coconut groves, and areca nut plantations, typical of the coastal Karnataka plains. While not directly on the coast, Tuminkatti is influenced by the proximity to the Arabian Sea, experiencing a humid tropical climate. The town’s elevation, though modest, contributes to localised variations in temperature and wind patterns. Air quality is significantly impacted by its agricultural surroundings; seasonal burning of crop residue is a major contributor to particulate matter. The absence of large-scale heavy industry within Tuminkatti itself is somewhat offset by regional industrial activity further east, and transport emissions from the national highway that passes nearby. The town’s relatively limited infrastructure and reliance on biomass for cooking further exacerbate localised pollution challenges. Understanding this interplay of geography and activity is vital for assessing and mitigating air quality concerns.

Tuminkatti’s air quality follows a distinct seasonal pattern dictated by the monsoon and post-monsoon conditions. The southwest monsoon, typically arriving in June and lasting until September, brings heavy rainfall which temporarily washes pollutants from the air, resulting in relatively cleaner air during these months. However, increased humidity can also foster mould growth, impacting respiratory health. October to November sees a post-monsoon transition, with decreasing rainfall and increasing agricultural activity, including crop residue burning, leading to a noticeable spike in particulate matter. This is often the worst period for air quality. December to February are generally drier months with cooler temperatures, and stable atmospheric conditions can trap pollutants, particularly in the mornings, creating localised smog. Wind speeds are lower during this period, hindering dispersion. March to May are the hottest and driest months, with dust storms and increased vehicle emissions contributing to poorer air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the post-monsoon and pre-monsoon seasons. Investing in indoor air purification and monitoring conditions is advisable.