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Sucat, nestled within Muntinlupa City in the Philippines, occupies a crucial position in the broader Metro Manila conurbation. Its coordinates (14.4600, 121.0500) place it in the western portion of the city, relatively close to Laguna de Bay, the largest lake in the Philippines. The terrain is generally flat to gently rolling, characteristic of the alluvial plains formed by the Pasig-Marikina River system. This proximity to the lake, while offering ecological benefits, also contributes to humidity and potential for stagnant air masses. Sucat’s urban character is rapidly transitioning, evolving from a primarily residential and agricultural area to a bustling commercial and industrial hub, particularly along the South Luzon Expressway (SLEX). This industrial growth, coupled with the high population density (56,354), is a significant driver of air pollution. The surrounding landscape is a mosaic of urban sprawl, interspersed with pockets of agricultural land further south and east. The urban-rural gradient is steep, with densely populated areas immediately adjacent to more sparsely populated, agricultural zones. The location within the Manila metropolitan area means Sucat is heavily influenced by regional pollution transport, exacerbated by prevailing wind patterns and the concentration of emissions from surrounding cities and transport corridors.

Sucat experiences a tropical monsoon climate, broadly defined by wet and dry seasons rather than traditional four seasons. Air quality generally deteriorates during the dry season (November to May), peaking between March and April. This is due to reduced rainfall, leading to the accumulation of pollutants, and increased dust from construction and unpaved roads. Temperature inversions, common during the calmer mornings of the dry season, trap pollutants near ground level. The southwest monsoon (habagat), arriving around June, brings heavy rainfall that temporarily washes away pollutants, improving air quality. However, increased traffic congestion during the monsoon season, as people seek shelter from the rain, can partially offset these gains. The northeast monsoon (amihan), from November to February, brings cooler, drier air, but also contributes to pollutant build-up. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the peak of the dry season. Fog, particularly in the early mornings, can exacerbate respiratory issues. Months of June to October generally offer the best air quality, though localised pollution from traffic remains a concern. Staying indoors during peak traffic hours and using air purifiers are recommended.