Aguilares Air Quality Index (AQI)

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Aguilares, nestled in the department of San Salvador, El Salvador, occupies a geographically significant position within the Central Volcanic Belt of El Salvador. Located at approximately 13.95° N, 89.18° W, the city sits at an elevation of around 650 meters (2,130 feet) above sea level, contributing to a generally temperate climate. The surrounding landscape is characterized by rolling hills and valleys, typical of the volcanic terrain, with agricultural lands dominating the rural areas immediately bordering Aguilares. This proximity to farmland, particularly areas cultivating maize and beans, introduces potential sources of particulate matter from agricultural practices, including burning and fertilizer use. The urban-rural gradient transitions relatively quickly, with small villages and scattered rural settlements giving way to the more concentrated urban fabric of Aguilares. While not directly adjacent to a major river, the city benefits from the presence of smaller streams and drainage channels that influence local microclimates. San Salvador, the national capital, lies approximately 45 kilometers (28 miles) to the northwest, and the industrial activity concentrated in and around San Salvador can contribute to regional air pollution transported by prevailing winds. The volcanic soil, while fertile, can also be prone to erosion, leading to dust emissions during the dry season. The terrain’s topography, with its hills and valleys, can create localized areas of stagnant air, particularly during periods of low wind speed, exacerbating the impact of any pollution sources.

Aguilares experiences a tropical savanna climate, exhibiting distinct wet and dry seasons rather than the four traditional seasons. The dry season, typically spanning November through April, often presents the most significant air quality challenges. Reduced rainfall leads to lower atmospheric moisture, which inhibits the natural cleansing effect of precipitation. Furthermore, the lack of cloud cover allows for increased solar radiation, promoting photochemical reactions that contribute to ozone formation. Temperature inversions, common during the cooler nights of the dry season, trap pollutants near the ground, intensifying their concentration. Agricultural burning, a practice sometimes employed to clear land for planting, is most prevalent during this period, releasing substantial amounts of particulate matter and other pollutants. The wet season, from May to October, generally brings improved air quality due to frequent rainfall washing pollutants from the atmosphere and increased wind speeds dispersing them. However, heavy rainfall can also lead to increased levels of mold and fungal spores, impacting respiratory health. During the transition months (April/May and October/November), air quality can be variable, influenced by shifting wind patterns and the gradual change in precipitation frequency. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak sunlight hours and avoiding areas with visible smoke. Maintaining indoor air quality through proper ventilation and air filtration is also advisable.