Lagonoy Air Quality Index (AQI)

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Lagonoy, a municipality in the province of Camarines Sur, Philippines, occupies a coastal position along the Bicol Peninsula, facing the Pacific Ocean. Its coordinates (13.7353, 123.5208) place it within a landscape characterized by a mix of alluvial plains, gently rolling hills, and the immediate coastal environment. The terrain is generally low-lying, particularly closer to the shoreline, with a gradual increase in elevation as one moves inland. This proximity to the ocean significantly influences local weather patterns and, consequently, air quality. Lagonoy’s air quality is affected by prevailing winds carrying maritime air, which can be relatively clean, but also by potential pollutants from shipping activity and coastal erosion. The surrounding region is predominantly agricultural, with rice paddies and coconut plantations dominating the landscape. While Lagonoy isn’t a major industrial hub, smaller-scale agricultural processing and fishing activities contribute to localized emissions. The urban-rural gradient is quite pronounced; the poblacion represents the most concentrated area, while the surrounding barangays are largely rural. This gradient impacts air quality, with higher concentrations of pollutants typically found in the more densely populated areas. The Bicol River also plays a role, potentially influencing humidity and pollutant dispersion.

Lagonoy experiences a distinct wet and dry season, heavily influenced by the prevailing monsoon patterns. Air quality generally improves during the wet season (roughly November to May) as rainfall effectively washes particulate matter from the atmosphere. However, increased humidity can also contribute to the formation of mold and other biological pollutants. The northeast monsoon, bringing consistent rainfall, is typically the period of cleanest air. Pollution levels tend to peak during the dry season (June to October), when reduced rainfall allows pollutants from agricultural activities – burning of crop residue – and vehicle emissions to accumulate. Calm wind conditions during this period exacerbate the problem, leading to localized air stagnation. Temperature inversions, though less frequent than in temperate climates, can occur, trapping pollutants near the ground. October and November often see the poorest air quality due to the combination of dry conditions and agricultural burning. Sensitive groups, including children, the elderly, and those with respiratory conditions, should limit strenuous outdoor activity during these months. Monitoring wind direction is crucial; onshore winds can bring pollutants from nearby areas. Overall, the wet season offers more favourable conditions for outdoor activities.