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Kodusseri, a municipality nestled in the Kannur district of Kerala, India, occupies a low-lying coastal plain at approximately 10.3431°N, 76.3931°E. The terrain is largely flat, characteristic of the Malabar Coast, with a gentle slope towards the Arabian Sea, roughly 8 kilometers to the west. This proximity to the sea influences local weather patterns and contributes to high humidity levels. The surrounding landscape is a mosaic of lush paddy fields, coconut groves, and dense vegetation, typical of Kerala’s tropical climate. Kodusseri isn’t a major industrial hub, but benefits from, and is impacted by, the broader industrial activity concentrated further south in Kozhikode and towards the port city of Kannur. Agriculture dominates the local economy, with rice cultivation being prominent. The urban-rural gradient is relatively blurred; Kodusseri functions as a service centre for surrounding villages, resulting in moderate traffic and localised emissions. The lack of significant topographical features – hills or valleys – limits natural ventilation, potentially exacerbating pollutant concentrations during calm weather conditions. The coastal location means sea breezes can offer some dispersion, but also transport pollutants from marine sources. This geographical setting dictates the specific challenges and opportunities for maintaining good air quality in Kodusseri.

Kodusseri experiences a distinct wet and dry season, rather than traditional four seasons. Air quality generally improves during the Southwest Monsoon (June-September) as heavy rainfall effectively washes particulate matter from the atmosphere. However, increased humidity can also foster mould growth, impacting respiratory health. October-November sees a transition period with calmer winds and a build-up of pollutants from agricultural practices like post-harvest burning. This period often experiences stagnant air, leading to localised smog. The dry season (December-May) presents the most challenging air quality conditions. Lower rainfall and increased temperatures contribute to higher concentrations of dust and other particulate matter. January and February are typically the driest months, with minimal wind, creating ideal conditions for pollutant accumulation. March-May sees rising temperatures and potential for thermal inversions, trapping pollutants near the ground. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during these months. Monitoring local weather forecasts and avoiding peak traffic hours are recommended. The northeast monsoon in late autumn can bring temporary relief, but is less consistent than the Southwest Monsoon.