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Higüey, located in the eastern Dominican Republic's Yuma province, occupies a distinctive position within the Caribbean's urban-rural gradient that significantly influences its air quality patterns. Situated approximately 25 kilometers inland from the Caribbean Sea at coordinates 18.6181°N, -68.7111°W, the city rests in the fertile Higüey Valley at an elevation of around 100 meters above sea level, surrounded by the rolling hills of the Eastern Cordillera mountain range. This topographic basin creates a natural containment area where pollutants can accumulate under certain meteorological conditions. Higüey serves as the commercial and religious hub for the eastern Dominican Republic, with its urban character defined by a mix of colonial architecture and modern development radiating outward into agricultural zones dominated by sugarcane plantations, cattle ranches, and increasingly, tourism-related infrastructure. The city's position inland shields it somewhat from direct maritime influences but places it within the broader pollution transport patterns of the Caribbean basin. Proximity to major tourist destinations like Punta Cana (approximately 40 kilometers southeast) creates transportation corridors with significant vehicular emissions, while the surrounding agricultural activities contribute particulate matter during harvest seasons. The urban-rural interface sees gradual expansion of built-up areas into former agricultural lands, creating a patchwork landscape where local pollution sources interact with regional atmospheric conditions. Higüey's geography as an inland valley city in the tropics creates a complex air quality scenario where natural ventilation competes with pollutant trapping during stable atmospheric conditions.

Higüey experiences distinct seasonal air quality variations driven by Caribbean meteorological patterns, with pollution levels fluctuating in response to changing atmospheric conditions throughout the year. During the dry season from December to April, northeasterly trade winds typically provide good ventilation, dispersing pollutants and maintaining relatively favorable air quality, making these months optimal for outdoor activities. However, occasional temperature inversions can trap pollutants in the valley, particularly during calm nights and early mornings. The transition to the wet season from May to November brings increased humidity and convective rainfall that helps cleanse the atmosphere, though this period also sees higher temperatures and reduced wind speeds at times, allowing local pollution to accumulate. August through October represents the peak of hurricane season, when tropical systems can either flush the atmosphere with heavy rains or, conversely, create stagnant conditions ahead of approaching storms. Sensitive groups including those with respiratory conditions, children, and older adults should monitor local air quality reports particularly during the late dry season when agricultural burning may occur and during periods of atmospheric stability when pollutants concentrate near ground level. The most consistently favorable conditions for outdoor exertion typically occur during the mid-dry season months of January through March when trade winds are strongest and rainfall is minimal, while the hottest months of July and August may see reduced air quality during periods of low wind and high humidity.