Allen Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Allen, a municipality in Northern Samar, Philippines, occupies a geographically significant position on the Pacific coast of Samar Island. Located at 12.5013°N, 124.2820°E, the terrain is characterized by a coastal plain transitioning into rolling hills and mountains inland. This topography influences air quality by limiting atmospheric dispersion in valleys and lower-lying areas. The town directly borders the Pacific Ocean, experiencing the full force of prevailing winds and seasonal typhoons. While Allen isn’t heavily industrialized, its economy is largely agrarian, with rice paddies and coconut plantations dominating the surrounding landscape. These agricultural activities contribute to particulate matter through tilling, harvesting, and potential burning of agricultural waste. The urban-rural gradient is relatively sharp; Allen town proper is a concentrated area, quickly giving way to rural farmland and forested areas. Proximity to the ocean introduces sea salt aerosols, impacting air composition. The surrounding landscape, including the Biri Rock Formations to the north, creates localized wind patterns. The lack of significant industrial belts within Allen itself means that long-range transport of pollutants from other regions is a more significant factor than local emissions, though shipping traffic contributes. The coastal location makes it vulnerable to transboundary haze from Indonesian forest fires during certain periods.

Allen experiences a pronounced wet and dry season, dictating the rhythm of air quality. The dry season, typically from March to May, sees a peak in particulate matter. Reduced rainfall means less atmospheric cleansing, and agricultural practices like land preparation and potential slash-and-burn farming increase dust and smoke. Strong easterly winds during this period can also transport haze from other parts of the Philippines or even neighboring countries. The onset of the wet season in June brings a significant improvement in air quality as rainfall washes away pollutants. However, the wet season, lasting until November, is also typhoon season. While typhoons initially scrub the air, the strong winds can stir up dust and debris, and flooding can release pollutants from stagnant water. December to February represents a transitional period, generally with calmer winds and moderate rainfall, offering relatively better air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should exercise caution during the dry season and periods of intense wind. Avoiding strenuous outdoor activity during peak dust periods and staying indoors during typhoons is advisable. Monitoring weather patterns and being prepared for sudden shifts in air quality is crucial.