Vohipaho Air Quality Index (AQI)

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Vohipaho, nestled within the Fianarantsoa region of Madagascar, occupies a challenging geographical position in the central highlands. Situated at approximately -23.5521 latitude and 47.5093 longitude, the city’s elevation contributes to cooler temperatures than coastal areas, but also influences air dispersion patterns. The surrounding landscape is characterised by rolling hills and a mosaic of agricultural land, primarily rice paddies and small-scale farming. This agricultural activity, while vital to the local economy, introduces particulate matter from land preparation, burning of agricultural residue, and the use of fertilizers. Vohipaho isn’t directly adjacent to major bodies of water, though smaller rivers and streams dissect the region, potentially acting as conduits for pollutants during heavy rainfall. The urban-rural gradient is relatively sharp; the city centre is densely populated, transitioning quickly to rural farmland. Limited industrial activity exists within Vohipaho itself, but regional transport routes passing through the city contribute to vehicular emissions. The terrain, with its undulating hills, can create localized pockets of stagnant air, exacerbating pollution during calm weather conditions. Dust from unpaved roads is a significant contributor to particulate matter, particularly during the dry season. The city’s location within a valley further restricts air circulation.

Vohipaho experiences a distinct wet and dry season, profoundly impacting air quality. The dry season, roughly from April to October, sees a significant increase in particulate matter. Reduced rainfall means less atmospheric cleansing, and agricultural burning for land preparation is prevalent during this period, releasing substantial smoke and ash. Dust from unpaved roads also becomes a major issue as drier conditions facilitate its suspension. November marks the beginning of the wet season, bringing relief from particulate pollution as rainfall washes away accumulated dust and suppresses agricultural fires. However, the heavy rains can also lead to increased runoff, carrying pollutants from agricultural lands into waterways and potentially contributing to localised air quality issues near these sources. January and February are typically the wettest months, offering the cleanest air. Temperature inversions, common during the cooler nights of the dry season, trap pollutants near ground level, worsening conditions. Sensitive individuals – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, particularly in the mornings when inversions are strongest. The transition months (March and November) can be unpredictable, with fluctuating air quality.