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Nestled in the Kasaragod district of northern Kerala, Kanhangad occupies a distinctive position along India's southwestern Malabar Coast, approximately 50 kilometers north of the major port city of Mangaluru. Situated at coordinates 12.3421°N, 75.0945°E, this urban center lies at a modest elevation of around 20 meters above sea level, positioned between the Arabian Sea to the west and the undulating foothills of the Western Ghats to the east. This geography creates a compressed urban-rural gradient where the town's compact urban core transitions rapidly into cashew plantations, paddy fields, and tile manufacturing clusters. Kanhangad's location along National Highway 66—a critical transport artery connecting Kerala with Karnataka—exposes it to continuous diesel exhaust from heavy freight vehicles, while its proximity to the minor port of Azhikkal contributes additional maritime emissions. The town's terrain is characterized by laterite-rich soil that generates significant road dust during dry periods, exacerbated by local tile kilns that process this material. Surrounded by water bodies including the Kavvayi Backwaters to the south and multiple rivers, Kanhangad's tropical monsoon climate traps pollutants when seasonal winds shift, particularly as the town sits in a slight topographic bowl that inhibits dispersion. The cashew processing industry—a regional economic mainstay—adds organic particulate matter to the mix, creating a complex pollution profile shaped by its position between coastal commerce, agricultural processing, and highway logistics.

Kanhangad's air quality follows a pronounced seasonal rhythm dictated by its tropical monsoon climate. During the dry winter months from December to February, northeasterly winds bring relatively cleaner continental air, though February begins showing early signs of deterioration as temperatures rise and wind speeds decrease. The peak pollution period from February through April coincides with the pre-monsoon summer, when high temperatures, low humidity, and stagnant atmospheric conditions create thermal inversions that trap vehicle exhaust, tile kiln dust, and cashew processing emissions near ground level. These months see minimal precipitation and frequent road dust resuspension, making them particularly challenging for outdoor activities. The southwest monsoon from June to September brings dramatic relief as heavy rains wash pollutants from the air, though this season introduces other hazards including flooding and reduced visibility. October and November experience the retreating monsoon with moderate rainfall that maintains relatively good air quality. Sensitive groups—including children, elderly residents, and those with respiratory conditions—should limit prolonged outdoor exposure during the February-April peak, especially during morning hours when inversions are strongest. The monsoon months offer the safest conditions for outdoor exercise, though attention must shift to weather-related hazards. Annual planning should prioritize indoor activities during peak pollution months while leveraging the cleansing effects of monsoon rains for respiratory health management.