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Baradères, nestled in the Nippes department of Haiti (18.4826° N, 73.6388° W), occupies a geographically significant position within the country’s southern peninsula. The town is dramatically situated within a steep, mountainous landscape, characterized by rugged terrain and deep valleys carved by numerous streams and rivers flowing towards the Caribbean Sea. Its elevation, averaging around 600 meters above sea level, contributes to localized microclimates and influences air circulation patterns. The surrounding landscape is predominantly rural, a mosaic of small-scale agriculture – primarily coffee, plantains, and maize – interspersed with patches of dense tropical forest. This agricultural activity, while vital to the local economy, can contribute to localized air pollution through the burning of vegetation for land clearing and the use of fertilizers. The urban–rural gradient is sharp; Baradères itself is a relatively small town, exhibiting a traditional Haitian settlement pattern with densely packed housing and limited paved infrastructure. The proximity to the Caribbean Sea, approximately 30 kilometers to the south, introduces a maritime influence, moderating temperatures and occasionally bringing in sea breezes. However, the mountainous terrain often disrupts these breezes, leading to stagnant air conditions, particularly during periods of calm weather. There are no major industrial belts nearby; the region’s economy is overwhelmingly agrarian, minimizing large-scale industrial air pollution sources. The steep slopes and limited road access further isolate the town, impacting the dispersal of any pollutants that do arise.

Baradères experiences a tropical climate with distinct wet and dry seasons, significantly impacting air quality. The wet season, typically from April to November, brings frequent rainfall and high humidity. While the rain helps to cleanse the atmosphere, removing particulate matter, the increased humidity can exacerbate respiratory issues for sensitive individuals. The dry season, from December to March, is characterized by lower rainfall and prolonged periods of sunshine. During this time, stagnant air conditions are more common, particularly within the valleys and sheltered areas of the mountainous terrain. Temperature inversions, where cooler air is trapped beneath a layer of warmer air, can occur, preventing pollutants from dispersing vertically. Agricultural burning, a common practice at the start of the dry season to prepare fields, contributes significantly to particulate matter pollution. Fog, often forming in the higher elevations, can trap pollutants close to the ground, further degrading air quality. The months of January and February often see the highest concentrations of particulate matter due to a combination of agricultural burning and stable atmospheric conditions. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should limit outdoor activity during these periods, especially during the early morning hours when fog is prevalent. During the wet season, while overall air quality may improve, the high humidity can still trigger asthma and other respiratory ailments. Maintaining indoor air quality through proper ventilation is crucial year-round.