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Tudela, nestled in the province of Misamis Occidental on the island of Mindanao in the Philippines, presents a unique geographic context influencing its air quality. Situated at coordinates 8.2472, 123.8424, the municipality lies relatively close to the coast of Panguil Bay, benefitting from some marine influence but also potentially experiencing localized sea breezes that can trap pollutants. The terrain is characterized by a mix of low-lying coastal plains and gently rolling hills, gradually rising inland. This topography can contribute to temperature inversions, particularly during calmer periods, exacerbating air pollution. Tudela’s urban character is that of a developing municipality, with a population of approximately 28,599, indicating a growing reliance on motorized transport and potential for increased industrial activity. Surrounding Tudela are significant agricultural zones, primarily dedicated to rice and corn cultivation, which can contribute to particulate matter from farming practices like land preparation and crop residue burning. The urban-rural gradient is relatively sharp, with agricultural land immediately bordering the town proper. The proximity to larger urban centers like Ozamiz City also means potential for pollutant transport via prevailing winds. Understanding these geographical factors is crucial for assessing and mitigating air quality challenges in Tudela.

Tudela experiences a distinct wet and dry season, heavily influencing its air quality. The dry season, typically from February to May, sees a peak in particulate matter due to increased dust from agricultural activities, road construction, and drier conditions facilitating the suspension of pollutants. Lower rainfall means less atmospheric cleansing. March and April are generally the months with the poorest air quality. The onset of the wet season, around June, brings significant improvements as rainfall washes away pollutants and increases humidity, suppressing dust. However, the wet season, lasting until November, can also see localized flooding, potentially releasing pollutants from stagnant water and increasing mold spore concentrations. The northeast monsoon, prevalent from December to February, brings cooler temperatures and generally cleaner air, though increased vehicle use during the holiday season can offset some of these benefits. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exposure during the peak of the dry season. During the wet season, precautions should be taken to avoid contact with floodwaters. Fog, though not frequent, can occur during the transition periods and trap pollutants near the ground.