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Pallippurattusēri, a municipality in Kerala, India, is situated amidst the lush, low-lying coastal plains of the state’s Malabar region. Located at coordinates 9.7566°N, 76.3607°E, the city’s terrain is predominantly flat, gently sloping towards the Arabian Sea, approximately 10-15 kilometers to the west. This proximity to the coast significantly influences local weather patterns and, consequently, air quality. The surrounding landscape is a mosaic of rice paddies, coconut groves, and increasingly, residential and commercial developments. While not directly within a major industrial belt, Pallippurattusēri benefits from, and is impacted by, the industrial activity concentrated further south around Kozhikode and Feroke. The urban-rural gradient is relatively sharp; the city centre is densely populated, transitioning quickly to agricultural land and forested areas further inland. This creates localized pollution hotspots within the urban core, exacerbated by vehicular emissions and construction dust. The region experiences high humidity for much of the year, which can trap pollutants near the ground. The lack of significant elevation hinders natural dispersion of airborne particles, making Pallippurattusēri susceptible to air quality issues, particularly during periods of calm weather. The city’s position within a tropical climate also means unique challenges related to biomass burning during drier periods.

Pallippurattusēri’s air quality follows a distinct seasonal pattern dictated by the monsoon and inter-monsoon periods. The southwest monsoon, typically arriving in June and lasting until September, generally brings cleaner air. Heavy rainfall effectively washes away particulate matter, and increased wind speeds aid in dispersion. However, increased humidity can also foster mold growth, impacting respiratory health. October to December sees a transition period with calmer winds and a build-up of pollutants from local sources. This is often a period of moderate air quality concerns. January to March are generally the driest months, and this is when air quality tends to be poorest. Reduced rainfall means pollutants accumulate, and temperature inversions – where a layer of warm air traps cooler, polluted air near the ground – are more frequent. Biomass burning in agricultural fields surrounding the city contributes significantly to particulate matter during this time. April and May, before the monsoon’s arrival, are particularly challenging, with high temperatures and stagnant air. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during these months. The post-monsoon period (September-November) offers a brief respite with improving conditions.