Tepecoyo Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Tepecoyo, nestled within the department of La Libertad, El Salvador, occupies a geographically complex position. Located at coordinates 13.7003, -89.4678, the city sits within a valley influenced by the surrounding volcanic landscapes of the Apaneca mountain range. This terrain creates localized wind patterns and potential for temperature inversions, impacting air dispersion. The Pacific Ocean lies a short distance south, influencing humidity and coastal breezes, but also potentially contributing to salt aerosol concentrations. Tepecoyo’s elevation, approximately 80 meters above sea level, moderates temperatures but doesn’t fully negate the effects of regional climate. The urban character is transitioning, with a growing population of 14,322 experiencing increasing density. Surrounding Tepecoyo are significant agricultural zones, primarily dedicated to sugarcane and coffee cultivation, which contribute to seasonal biomass burning. While not a major industrial hub itself, Tepecoyo’s proximity to larger industrial areas along the coastal highway means it can experience transboundary pollution. The urban-rural gradient is relatively sharp, with agricultural land immediately bordering the city limits. This proximity means pollutants from agricultural practices, like pesticide drift and smoke from land clearing, can directly affect local air quality. The valley’s topography limits natural ventilation, exacerbating pollution build-up.

Air quality in Tepecoyo experiences distinct fluctuations tied to El Salvador’s bimodal rainfall pattern. The dry season, typically from November to April, presents the most challenging conditions. Reduced rainfall means less atmospheric cleansing, and increased agricultural burning for sugarcane harvest significantly elevates particulate matter. January and February are often the months with the poorest air quality. Stronger solar radiation during these months also promotes photochemical smog formation, increasing ground-level ozone. The transition to the wet season (May-June) brings a noticeable improvement as rainfall washes away pollutants and suppresses dust. However, increased humidity can also foster mold growth, impacting indoor air quality. July to October, the peak of the rainy season, generally offers the cleanest air, with consistent rainfall and higher wind speeds dispersing pollutants. However, localized flooding can disrupt transportation and potentially release contaminants from damaged infrastructure. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exertion during the dry season, particularly in January and February. Monitoring wind direction is crucial; winds from agricultural areas will carry higher pollutant loads. During the wet season, maintaining good ventilation indoors is important to prevent mold growth.