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Puerto Cumarebo, nestled in the state of Falcón, Venezuela (11.4861°N, -69.3503°W), is a coastal city profoundly shaped by its interaction with the Caribbean Sea. Situated at a relatively low elevation, the terrain is primarily flat, transitioning into arid and semi-arid landscapes inland. The city’s position within the Paraguaná Peninsula, a region known for its oil industry and salt production, significantly influences its air quality. While not a major industrial hub itself, Puerto Cumarebo is downwind from significant oil refining and processing facilities located further north along the peninsula, particularly around Cardón and Amuay. These facilities are potential sources of sulfur dioxide, particulate matter, and volatile organic compounds. The surrounding landscape is characterized by scrubland vegetation adapted to the dry climate, with limited forest cover to naturally filter pollutants. The urban-rural gradient is relatively sharp; the city itself is densely populated compared to the sparsely inhabited hinterland. Proximity to the sea introduces sea breezes that can both disperse and concentrate pollutants, depending on atmospheric conditions. Agricultural activity, primarily focused on livestock raising and limited crop cultivation, contributes to dust and ammonia emissions, particularly during drier periods. The prevailing winds, generally from the northeast, carry pollutants from industrial sources towards Puerto Cumarebo.

Puerto Cumarebo experiences a distinct dry season, typically from January to May, and a wet season from June to December. Air quality generally deteriorates during the dry season. Reduced rainfall means less atmospheric cleansing, allowing pollutants from regional industrial sources and dust from the arid landscape to accumulate. Stronger, consistent winds during this period can transport these pollutants directly into the city. Temperature inversions, common in the mornings, trap pollutants near the ground, exacerbating the issue. The wet season offers temporary relief, as rainfall washes pollutants from the air. However, increased humidity can also promote the formation of secondary pollutants. August and September, coinciding with peak rainfall, are generally the months with the best air quality. November, as the dry season approaches, sees a gradual decline. 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 air quality is better, mold growth indoors can pose a health risk. Monitoring wind direction is crucial; periods with winds from the north are likely to bring higher pollution levels. Fog, though infrequent, can trap pollutants during cooler mornings.