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Mambusao is an inland municipality nestled within the fertile plains of Capiz on Panay Island. Unlike the coastal hubs of the province, Mambusao is characterized by a predominantly rural landscape, where vast stretches of rice paddies and sugarcane plantations define the urban–rural gradient. The terrain is generally flat, though it is bordered by rolling hills that create a natural basin effect. This topographical arrangement plays a critical role in local air quality; while the open fields allow for significant dispersion of pollutants, the surrounding elevations can occasionally trap stagnant air during temperature inversions. The city serves as a vital agricultural node, meaning the atmospheric composition is heavily influenced by seasonal farming activities rather than heavy industrial belts. There are no massive factories here, but the proximity to agricultural zones introduces organic particulate matter into the air. The urban center is compact, with a network of roads dominated by light transport, which concentrates emissions in the town plaza and market areas. Water bodies, including local streams and irrigation canals, provide some evaporative cooling, helping to mitigate the urban heat island effect common in denser cities. Positioned far from the immediate saline influence of the Sibuyan Sea, Mambusao relies on the broader regional wind patterns of the Western Visayas to flush out pollutants. Consequently, the air quality is typically superior to metropolitan centers, yet remains susceptible to localized spikes during harvest and clearing seasons of crops.

Mambusao’s air quality is dictated by the rhythmic oscillation between the dry season and the wet season. From December to May, the region experiences the dry period, often influenced by the cool Northeast Monsoon, or Amihan. During these months, particularly in March and April, air quality can dip as lower humidity and reduced rainfall lead to an accumulation of dust and particulate matter. This period coincides with agricultural clearing, where the burning of rice straws and sugarcane trash releases significant smoke into the basin, potentially triggering respiratory distress for sensitive groups. Conversely, the wet season, spanning June to November, brings the Southwest Monsoon, or Habagat. Frequent, heavy rainfall acts as a natural scrubbing mechanism, washing pollutants from the atmosphere and keeping the air crisp and clean. However, high humidity during these months can exacerbate the feeling of heaviness in the air, and stagnant conditions before a storm can trap ground-level emissions. For those with asthma or chronic obstructive pulmonary disease, the peak burning months of the dry season are the most hazardous, requiring limited outdoor exertion during midday peaks. Conversely, the late monsoon months offer the most refreshing air for outdoor activities. To maintain health, residents are encouraged to monitor smoke haze during the harvest. Overall, the meteorological cycle ensures a natural reset of the atmosphere, though the intersection of heat and agricultural biomass burning remains the primary seasonal challenge faced here.