Libon Air Quality Index (AQI)

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Legazpi City, nestled in the province of Albay in the Philippines, presents a unique geographic context influencing its air quality. Situated at 13.3000°N, 123.4333°E, the city lies in a valley dominated by the majestic Mayon Volcano, an active stratovolcano that profoundly shapes the landscape and atmospheric conditions. The terrain is characterized by fertile alluvial plains created by volcanic deposits, gradually rising towards the surrounding hills and the slopes of Mayon. Legazpi’s proximity to the Albay Gulf, a part of the Pacific Ocean, introduces maritime influences, including sea breezes that can both disperse and concentrate pollutants. The city functions as a regional hub for Bicol Region, serving as a commercial, educational, and transportation center. While not heavily industrialized, Legazpi experiences air quality impacts from vehicle emissions, construction, and seasonal agricultural burning in surrounding areas. The urban-rural gradient is relatively sharp, with agricultural lands and coconut plantations immediately bordering the city limits. The volcanic activity introduces particulate matter into the atmosphere, a constant background factor. The city’s location within a typhoon belt also means frequent heavy rainfall events, which can temporarily cleanse the air but also contribute to flooding and related issues.

Legazpi City experiences a distinct wet and dry season, heavily influencing air quality. The dry season, typically from March to May, sees a build-up of pollutants due to reduced rainfall for atmospheric cleansing and increased dust from agricultural activities and construction. Hotter temperatures during these months can also contribute to the formation of ground-level ozone. Conversely, the wet season, from June to February, brings frequent rainfall and strong winds associated with the southwest monsoon and typhoons, effectively washing away pollutants and improving air quality. However, these storms can also stir up dust and debris. November to January often experience the highest rainfall, offering the cleanest air. August and September, peak typhoon months, can see temporary spikes in particulate matter due to wind-blown dust and debris. Sensitive groups, including children, the elderly, and those with respiratory conditions, should limit prolonged outdoor exposure during the dry season and take precautions during and after typhoons. Monitoring wind direction is crucial; winds from the direction of Mayon Volcano can carry volcanic ash. The humidity is consistently high, potentially exacerbating respiratory issues.