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Los Bellosos, nestled within the Cibao Norte province of the Dominican Republic, occupies a geographically significant position within a region renowned for its fertile valleys and agricultural productivity. Located at approximately 19.8333° N, 71.0167° W, the city sits at a moderate elevation, contributing to a generally mild climate. The surrounding landscape is dominated by rolling hills and expansive plains, characteristic of the Cibao Valley, a major agricultural heartland. This proximity to intensive farming practices, particularly sugarcane and livestock rearing, inherently influences the local air quality. The valley’s topography, while generally open, can occasionally trap pollutants, especially during periods of low wind. Los Bellosos benefits from its location near the Yaque del Norte river, the country’s longest river, which provides a vital water source but also introduces potential sources of waterborne pollutants that can indirectly impact air quality through aerosolization. The urban–rural gradient around Los Bellosos is relatively gradual; the city blends seamlessly into the agricultural landscape, with small rural settlements and farms dotting the periphery. While not situated directly within a major industrial belt, the Cibao region does host some processing plants related to agriculture, and transportation corridors carrying goods to and from these facilities can contribute to localized air pollution. The prevailing winds, generally easterly, play a crucial role in dispersing or concentrating pollutants, depending on their strength and direction relative to the city’s layout.

The air quality in Los Bellosos follows a distinct seasonal pattern dictated by the Dominican Republic’s tropical climate, characterized by wet and dry seasons rather than the traditional four. The dry season, typically spanning from December to April, often sees a slight increase in particulate matter due to reduced rainfall and increased agricultural burning. Farmers may utilize controlled burns to clear fields for planting, releasing smoke and soot into the atmosphere. While wind speeds are generally moderate, temperature inversions can occasionally occur during the cooler nights of January and February, trapping pollutants closer to the ground. The wet season, from May to November, brings frequent rainfall, which naturally helps to cleanse the air by washing away particulate matter and reducing the concentration of gaseous pollutants. However, heavy rainfall can also lead to increased humidity, which can exacerbate respiratory issues for sensitive individuals. During the transition months (April and November), fluctuating weather patterns can result in unpredictable air quality. Fog, particularly in the mornings, can also temporarily reduce visibility and trap pollutants. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions like asthma, should be particularly cautious during the dry season and periods of reduced wind. Outdoor activities are generally more favorable during the wet season, but vigilance regarding potential allergens carried by the humidity is advised. Agricultural workers should be aware of potential smoke exposure during field clearing activities and take appropriate precautions.