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Sigaboy, nestled within the province of Davao Oriental in the Philippines, presents a unique geographic context influencing its air quality. Located at 6.6536°N, 126.0717°E, the city sits relatively close to the Pacific Ocean, experiencing maritime influences. The terrain is characterized by a mix of coastal plains and rolling hills, gradually ascending inland. This topography can contribute to localized air stagnation, particularly in lower-lying areas. Sigaboy’s urban character is that of a developing coastal town, with a population of approximately 59,891. While not heavily industrialized, the surrounding region features significant agricultural activity, primarily focused on banana plantations and coconut farming. These agricultural practices, including the use of fertilizers and potential burning of agricultural waste, can contribute to particulate matter and ammonia emissions. The urban-rural gradient is fairly sharp, with agricultural lands immediately bordering the town proper. Proximity to the ocean generally provides some atmospheric dispersion, but prevailing wind patterns, often influenced by the seasonal monsoons, can concentrate pollutants during calmer periods. The Davao Oriental coastline is also prone to occasional typhoons, which, while bringing cleansing rains, can also stir up dust and debris, temporarily impacting air quality. Understanding these geographical factors is crucial for assessing and mitigating air pollution in Sigaboy.

Sigaboy experiences a distinct wet and dry season, heavily influencing its air quality. The dry season, typically from March to May, sees a peak in particulate matter due to increased dust from agricultural activities and potential open burning. Lower rainfall means less atmospheric cleansing, and stable atmospheric conditions can lead to pollutant build-up. This is a period when individuals with respiratory conditions should exercise caution. The onset of the wet season, around June, brings significant improvements in air quality as rainfall washes away pollutants. However, increased humidity can also foster mold growth, potentially exacerbating allergies. The peak of the wet season, July to September, often coincides with typhoon activity. While typhoons offer temporary relief through heavy rainfall, they can also stir up dust and debris, causing short-term air quality dips. October to November represents a transitional period with gradually decreasing rainfall and a potential return of dust. December to February generally offers the most favourable air quality conditions, with cooler temperatures and occasional rainfall. Sensitive groups, including children and the elderly, should be particularly mindful during the dry season and periods of high humidity, limiting strenuous outdoor activity and considering the use of air purifiers when necessary.