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Lecherías, nestled in the state of Anzoátegui, Venezuela (10.1917, -64.6921), is a coastal city strategically positioned along the Caribbean Sea. Its relatively flat terrain, with an elevation barely above sea level, contributes to limited natural air dispersion. The city’s urban character is defined by a blend of residential areas, commercial zones catering to tourism, and a growing industrial sector focused on petrochemicals and related activities. Lecherías benefits from its proximity to the extensive oil fields of Anzoátegui, but this also introduces potential pollution sources. Surrounding the city is a landscape transitioning from coastal plains to the foothills of the Venezuelan Coastal Range. To the south, agricultural lands dominate, while the immediate hinterland exhibits a mixed urban-rural gradient. The constant sea breeze, while offering some relief, can also trap pollutants under certain atmospheric conditions, particularly during temperature inversions. The city’s location within a tropical climate zone means humidity is consistently high, potentially exacerbating the effects of particulate matter. The concentration of industry and port activity near the urban core directly impacts local air quality, creating a microclimate distinct from more rural areas further inland. This coastal location makes Lecherías particularly vulnerable to marine aerosol contributions to particulate matter.

Lecherías experiences a distinct wet and dry season, rather than traditional four seasons. Air quality generally improves during the wet season (May to November) due to increased rainfall which effectively washes particulate matter from the atmosphere. However, high humidity during this period can also promote the formation of secondary pollutants. The dry season (December to April) consistently presents the poorest air quality. This is driven by reduced rainfall, increased dust from drier agricultural lands, and a greater concentration of pollutants from industrial and vehicular sources. January and February are typically the months with the lowest air quality. Temperature inversions, common during the calmer dry season mornings, trap pollutants near ground level. The prevailing easterly trade winds offer some dispersion, but are often insufficient to fully clear the air. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the dry season, particularly in the mornings. During the wet season, while overall air quality is better, increased mold spores can trigger asthma attacks. Monitoring wind patterns and avoiding peak traffic hours are advisable year-round.