Ilaka Atsinanana Air Quality Index (AQI)

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Ilaka Atsinanana, nestled within the Toamasina Province of Madagascar, occupies a geographically significant position on the eastern coast. Located at approximately -19.5503 latitude and 48.8371 longitude, the area’s urban character is intrinsically linked to its coastal setting. The terrain is generally low-lying, transitioning from sandy beaches and coastal plains to gently undulating hills further inland. This proximity to the Indian Ocean exerts a powerful influence on the local climate and, consequently, air quality. Toamasina, the provincial capital and the dominant urban centre nearby, acts as a regional hub for trade and agriculture, contributing to localized pollution sources. The surrounding landscape is a mosaic of coastal forests, palm groves, and agricultural land, primarily dedicated to clove, vanilla, and rice cultivation. These agricultural zones, while vital to the regional economy, can contribute to particulate matter through burning practices and fertilizer use. The urban–rural gradient is relatively sharp, with the densely populated areas of Ilaka Atsinanana quickly giving way to more sparsely populated agricultural and forested regions. The prevailing easterly trade winds, common to this part of Madagascar, play a crucial role in dispersing pollutants, though their effectiveness can be diminished by local topography and weather patterns. The presence of the Port of Toamasina, a major shipping hub, introduces potential sources of air pollution from vessel emissions and associated industrial activities, impacting air quality in surrounding areas like Ilaka Atsinanana.

The air quality in Ilaka Atsinanana is heavily dictated by Madagascar’s tropical climate, characterized by distinct wet and dry seasons rather than the four traditional seasons. The dry season, typically spanning from May to October, often sees a slight improvement in air quality due to reduced humidity and increased wind speeds. These winds, predominantly easterly, help to disperse pollutants, preventing significant build-up. However, agricultural burning, a common practice during land clearing for planting, can lead to spikes in particulate matter during this period, particularly in late April and early May. The wet season, from November to April, brings increased rainfall and higher humidity. While the rain helps to wash pollutants from the atmosphere, persistent fog and reduced wind speeds can trap pollutants near the ground, especially during the peak of the rainy season (January-February). Temperature inversions, though less frequent than in temperate climates, can occasionally occur, further exacerbating air quality issues by preventing vertical mixing. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of agricultural burning and when fog is prevalent. Outdoor activities are generally more favourable during the drier months, but vigilance regarding potential smoke events remains essential. The impact of the monsoon winds, though less pronounced than in other parts of the Indian Ocean, still influences local wind patterns and the dispersal of pollutants, contributing to the overall seasonal variability in air quality.