Capitão de Campos Air Quality Index (AQI)

Loading live AQI data...

Loading weather snapshot...

Loading historical AQI trends...

Capitão de Campos, nestled in the heart of Piauí, Brazil, occupies a unique geographic position within the semi-arid Sertão region. Located at -4.4569 latitude and -41.9439 longitude, the city sits on a relatively flat terrain, typical of the Piauí interior, with an elevation around 80-100 meters. This low-lying landscape contributes to limited natural air dispersion. The surrounding landscape is dominated by *caatinga* vegetation – a thorny scrub forest adapted to prolonged drought. The city’s air quality is significantly influenced by its rural setting, though increasing agricultural activity, particularly cattle ranching, introduces dust and potential ammonia emissions. The nearby Parnaíba River, while a vital water source, doesn’t offer substantial cooling or wind flow to mitigate pollution. Capitão de Campos isn’t situated near major industrial belts, lessening the impact of heavy industry, but seasonal burning of vegetation for agricultural purposes and land clearing is a key factor. The urban-rural gradient is relatively sharp; the city itself is compact, with surrounding areas dedicated to agriculture and pasture. This proximity means pollutants from agricultural practices can readily affect the city’s air. The lack of significant topographical features hinders pollutant dispersal, concentrating emissions during calm weather conditions. Understanding this interplay of landscape and activity is crucial for assessing and managing air quality in Capitão de Campos.

Capitão de Campos experiences a pronounced wet and dry season, dictating the rhythm of its air quality. The dry season, typically from June to November, presents the most challenging conditions. Reduced rainfall leads to increased dust resuspension from the *caatinga* and agricultural lands, significantly impacting particulate matter levels. Strong, dry winds can exacerbate this, carrying dust across the city. Temperature inversions, common during the cooler nights of the dry season, trap pollutants near the ground. Conversely, the wet season (December to May) generally brings improved air quality. Rainfall effectively washes away particulate matter, and increased humidity reduces dust levels. However, even during the wet season, localized pollution events can occur due to agricultural burning, often undertaken to prepare fields for planting. February and March, transitioning from wet to dry, can see a temporary increase in biomass burning smoke. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the peak of the dry season (August-October). Monitoring wind direction is also important, as pollutants can be transported from surrounding agricultural areas. The transition periods require heightened awareness, as conditions can change rapidly.