Kudachi, a town in Karnataka, India, sits at coordinates 16.4800°N, 74.7800°E, nestled within the broader Deccan Plateau. The terrain is generally undulating, characteristic of this region, with a moderate elevation contributing to relatively stable atmospheric conditions. The town’s population of approximately 35,000 reflects its status as a developing urban centre, transitioning from a predominantly agricultural base. Kudachi is situated near the Krishna River, a vital water source but also a potential pathway for pollutant transport during monsoon seasons. Surrounding Kudachi are extensive agricultural lands, primarily sugarcane and cotton, with associated agricultural practices like crop residue burning contributing to localised air pollution. The urban-rural gradient is pronounced; the town itself experiences higher concentrations of vehicular emissions and dust, while surrounding villages rely more heavily on biomass burning for cooking and heating. The proximity to industrial areas in nearby cities like Hubballi-Dharwad, approximately 60km away, introduces long-range transport of pollutants. The prevailing winds, influenced by the monsoon patterns and regional topography, play a crucial role in dispersing or concentrating these pollutants. Understanding this geographic context is vital for assessing and mitigating air quality challenges in Kudachi.

Kudachi experiences a tropical climate with distinct wet and dry seasons heavily influencing air quality. The post-monsoon period (October-November) often sees a temporary improvement as rainfall washes away accumulated pollutants, but this is short-lived. The dry season (December-May) is typically the worst for air quality. Lower wind speeds and increased temperatures lead to stagnant air, trapping pollutants from vehicular traffic, construction, and agricultural burning. January and February are particularly challenging, with potential for temperature inversions exacerbating particulate matter concentrations. The pre-monsoon months (April-May) witness increased dust storms and agricultural fires preparing fields for planting, further degrading air quality. The monsoon season (June-September) brings relief through rainfall, but increased humidity can promote the formation of secondary pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, especially in April and May. During the monsoon, while particulate matter decreases, mould and fungal spores can trigger respiratory issues. Monitoring wind patterns and avoiding peak pollution times are crucial for protecting public health.