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Tiburon, nestled on the southwestern peninsula of Haiti (coordinates 18.3266, -74.3953), presents a unique geographic profile significantly influencing its air quality. The town sits within the Tiburon Department, a region characterized by dramatic coastal cliffs, rugged mountains, and a relatively narrow coastal plain. Its location on the peninsula creates a funneling effect for prevailing winds, which can concentrate pollutants in certain areas, particularly during periods of low wind speed. The surrounding landscape is dominated by steep slopes covered in a mix of remnant forests and agricultural land, primarily small-scale farming of coffee, cocoa, and plantains. This agricultural activity, while vital to the local economy, contributes to particulate matter through burning practices and soil erosion. The proximity to the Caribbean Sea moderates temperatures but also introduces marine aerosols, which can interact with other pollutants. The urban–rural gradient is sharp; Tiburon itself is a small town, transitioning quickly to rural agricultural areas and dense forests. There are no major industrial belts directly adjacent to Tiburon, however, the larger port city of Les Cayes, approximately 50km to the north, could potentially influence air quality through shipping emissions and industrial activity, though the distance and prevailing winds generally dilute this impact. Elevation varies considerably within the immediate area, with the mountains rising sharply from the coastline, impacting local air circulation patterns and potentially trapping pollutants in valleys. The terrain’s complexity means localized variations in air quality are likely.

Tiburon’s tropical climate dictates a wet and dry season pattern, profoundly impacting its air quality. The wet season, typically from April to October, brings frequent rainfall which naturally helps to cleanse the atmosphere, removing particulate matter and gaseous pollutants. However, intense rainfall events can also lead to increased soil erosion, contributing to dust and sediment in the air. The dry season, from November to March, is characterized by lower rainfall and increased sunshine, often accompanied by periods of relative calm. This can lead to temperature inversions, where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing. Agricultural burning, a common practice for land clearing and crop residue disposal, is most prevalent during the dry season, significantly increasing particulate matter concentrations. Fog, which can form in the mornings during the dry season, further exacerbates this issue by trapping pollutants close to the ground. The months of January and February are generally the most challenging for air quality due to the combination of temperature inversions, agricultural burning, and reduced rainfall. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during these periods, particularly during early morning hours. During the wet season, while overall air quality is generally better, heavy rainfall can still trigger episodes of respiratory discomfort due to increased humidity and potential mold growth. Maintaining indoor air quality through ventilation and air purification is advisable year-round.