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Paluan, a municipality nestled in the western region of Occidental Mindoro, Philippines, presents a unique geographic setting influencing its air quality. Situated at coordinates 13.4200, 120.4700, the town is characterized by a coastal terrain, bordering the South China Sea. The landscape transitions from relatively flat coastal plains to gently rolling hills inland, with elevation generally remaining low, contributing to limited natural air dispersion. Paluan’s position within Mindoro Island places it within a region heavily influenced by agricultural activity, particularly rice farming and livestock rearing, which can contribute to particulate matter and ammonia emissions. While not a major industrial hub, smaller-scale processing of agricultural products occurs, adding to potential localised pollution sources. The urban-rural gradient is pronounced; the *poblacion* (town centre) is relatively compact, while surrounding areas are predominantly rural, with dispersed settlements and agricultural land. Proximity to the sea introduces the influence of sea breezes, which can both dilute and transport pollutants. The prevailing winds, influenced by the monsoon patterns, play a crucial role in pollutant dispersal, but can also concentrate them during periods of calm. The surrounding forests, though present, are under pressure from agricultural expansion, reducing their capacity as natural air filters. This combination of factors creates a complex air quality profile for Paluan.

Paluan experiences a distinct wet and dry season, profoundly impacting air quality. The dry season, typically from December to May, sees a concentration of pollutants due to reduced rainfall and increased dust from agricultural activities and unpaved roads. February to April are often the months with the poorest air quality, as winds are calmer, and temperature inversions can trap pollutants near the ground. During this period, sensitive individuals – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity. The onset of the wet season, around June, brings significant improvements. Monsoon rains effectively wash particulate matter from the atmosphere, and increased humidity suppresses dust. However, the wet season also brings increased fungal spores, potentially exacerbating allergies. August and September, peak monsoon months, generally offer the cleanest air. November sees a transitional period, with decreasing rainfall and a gradual build-up of pollutants. Fog, common during the cooler months, can also trap pollutants, reducing visibility and impacting respiratory health. Overall, avoiding prolonged outdoor exertion during the drier months and being mindful of potential allergens during the wet season are key to protecting respiratory health in Paluan.