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Kailāshahar, nestled in the northern Tripura district of India, occupies a unique geographic position within the state’s undulating terrain. Situated at coordinates 24.3300°N, 92.0200°E, the town lies at an elevation of approximately 164 meters (538 feet) above sea level. This location places it within the foothills of the Baramura range, contributing to a landscape characterized by gentle slopes and valleys. The surrounding area is predominantly rural, dominated by agricultural lands – primarily rice cultivation – and interspersed with patches of mixed deciduous forests. The Howrah River flows nearby, influencing local humidity and potentially contributing to localized temperature inversions. Kailāshahar serves as a crucial market town for the surrounding agricultural communities, and a transit point for goods moving towards other parts of Tripura and neighbouring states. While not a major industrial hub, the presence of small-scale brick kilns and local industries contributes to particulate matter emissions. The urban-rural gradient is quite sharp, with a relatively concentrated town centre giving way rapidly to agricultural fields. This proximity to agricultural practices, including seasonal crop burning, significantly impacts local air quality, alongside dust from unpaved roads and construction activities. The town’s position within a valley can also trap pollutants, exacerbating air quality issues during calm weather conditions.

Kailāshahar experiences a tropical monsoon climate, resulting in distinct wet and dry seasons that heavily influence air quality. The pre-monsoon months of March to May are typically the worst for air quality. Rising temperatures and dry winds stir up dust from agricultural fields and unpaved roads, leading to increased particulate matter concentrations. This period often sees increased instances of wildfires in nearby forests, further degrading air quality. The arrival of the monsoon in June brings a temporary respite, as rainfall washes away pollutants and increases humidity, suppressing dust. However, increased moisture can also promote the growth of mold and allergens. Post-monsoon, from September to November, air quality generally remains favourable, with clear skies and moderate temperatures. The winter months, December to February, can see a build-up of pollutants due to temperature inversions – cool air trapped near the ground – and increased use of biomass for heating. Sensitive groups, including children, the elderly, and those with respiratory conditions, should limit outdoor activity during the pre-monsoon and winter months. Avoiding peak traffic hours and using masks when outdoors can offer additional protection. Monitoring local weather patterns and being aware of agricultural burning practices are also crucial for managing exposure.