Maragogipe Air Quality Index (AQI)

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Maragogipe, a coastal municipality in the state of Bahia, Brazil, presents a unique geographic context influencing its air quality. Situated at -12.7778 latitude and -38.9189 longitude, the city lies along the Atlantic coastline, characterized by a low-lying terrain and a humid tropical climate. The surrounding landscape is a mosaic of coastal plains, mangrove forests, and sandy beaches, typical of the northeastern Brazilian coast. The Franaga River and other smaller waterways dissect the region, contributing to high humidity levels. Maragogipe’s urban character is largely defined by its fishing communities and growing tourism sector, with a population of approximately 35,859. While not heavily industrialized, the region supports agricultural activities, primarily coconut and cacao cultivation, and small-scale shrimp farming. These activities, alongside boat traffic and potential seasonal burning of vegetation, contribute to localized emissions. The urban-rural gradient is relatively sharp, with denser settlement concentrated near the coast and more dispersed rural areas inland. Proximity to the ocean provides some atmospheric dispersion, but also traps pollutants during periods of calm winds and temperature inversions, particularly during the dry season. The city’s location within a tropical zone means consistent high temperatures and humidity, impacting pollutant formation and dispersion.

Maragogipe experiences a distinct wet and dry season, profoundly impacting air quality. The wet season, typically from April to August, brings frequent rainfall and higher humidity, effectively scavenging pollutants from the atmosphere. This period generally sees the clearest air, with prevailing easterly trade winds aiding dispersion. However, increased rainfall can also lead to localized flooding and the spread of mold spores, potentially impacting respiratory health. The dry season, from September to March, is characterized by reduced rainfall, lower humidity, and calmer winds. This leads to pollutant build-up, particularly particulate matter from agricultural activities, dust from unpaved roads, and emissions from boat traffic. November to January are typically the months with the least atmospheric cleansing. Temperature inversions, common during the dry season’s cooler nights, exacerbate the problem by trapping pollutants near ground level. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during these periods. Monitoring wind patterns is crucial; periods of calm are associated with poorer air quality. The transition months (March/April and September/October) can be variable, requiring increased vigilance.