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Rose Belle, nestled within the Grand Port district of Mauritius, occupies a geographically significant position on the island’s southeast coast. Its coordinates, -20.4025, 57.6061, place it within a gently sloping coastal plain, transitioning gradually to the undulating terrain of the interior highlands. The village itself is characterized by a relatively low elevation, rarely exceeding 50 meters above sea level, which influences local air circulation patterns. The proximity to the Indian Ocean is a defining feature, providing a constant source of sea breezes that generally contribute to air dilution, though they can also carry marine aerosols. Surrounding Rose Belle is a mosaic of landscapes: to the west, agricultural lands dominate, with sugarcane fields stretching towards the central plateau; to the east, the coastline extends, punctuated by small bays and rocky outcrops. Further inland, the terrain rises, leading to more forested areas. The urban–rural gradient is relatively smooth, with smaller settlements and agricultural activities interspersed throughout the region. While Rose Belle itself is a small village, its location within the Grand Port region means it is influenced by activities in larger towns like Mahébourg. There are no major industrial belts immediately adjacent to Rose Belle, but the broader Grand Port area does contain some light industrial and commercial zones, and the island's primary airport, Sir Seewoosagur Ramgoolam International Airport, is located nearby, potentially contributing to localized air pollution events. The prevailing trade winds, typical of Mauritius, play a crucial role in dispersing pollutants, but local topography can create sheltered pockets where concentrations may build up.

Mauritius’s tropical climate dictates a distinct wet and dry season pattern, significantly impacting Rose Belle’s air quality. The wet season, typically from November to April, brings increased rainfall and humidity, generally leading to improved air quality due to atmospheric cleansing. Frequent showers wash away particulate matter, and higher humidity can trap some pollutants, but the overall effect is a reduction in airborne particles. The dry season, from May to October, is characterized by lower rainfall and increased sunshine, often accompanied by periods of relative atmospheric stability. During these months, particularly in September and October, temperature inversions can occur, trapping pollutants closer to the ground, especially in the mornings when cooler air settles in the valleys. Sea breezes, while usually beneficial, can be weaker during this period, reducing air mixing. Fog, though infrequent, can also exacerbate air quality issues by trapping pollutants. The agricultural activities surrounding Rose Belle, particularly sugarcane burning during the dry season, can contribute to localized smoke events. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of stagnant air, particularly in the mornings of the dry season. While the ocean provides a natural buffer, localized sources can still impact air quality. Outdoor activities are generally more favorable during the wet season, but even then, monitoring local conditions is advisable, especially near agricultural areas during harvest times. The airport's operations can occasionally lead to temporary increases in air pollutants, particularly during peak flight hours.