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Juatuba, nestled in the state of Minas Gerais, Brazil, occupies a strategically important position within the Belo Horizonte metropolitan region. Located at approximately -19.9519° latitude and -44.3428° longitude, the city sits at an elevation of around 830 meters (2723 feet) above sea level, contributing to a generally cooler climate compared to lower-lying areas of Minas Gerais. The surrounding landscape is characterized by the undulating hills and valleys typical of the Serra do Curral mountain range, a significant geological feature shaping the region's topography. This terrain influences local wind patterns and can contribute to localized air quality challenges. Juatuba’s proximity to Belo Horizonte, a major industrial and commercial hub, means it experiences a gradual urban–rural gradient, with increasing residential development encroaching upon agricultural lands. While Juatuba itself maintains a relatively small-town character, it’s increasingly integrated into the wider metropolitan network. The city is not directly adjacent to major rivers or lakes, though smaller streams and tributaries traverse the area, influencing microclimates. The dominant land use in the surrounding areas includes cattle ranching, soybean cultivation, and smaller-scale fruit orchards, all of which can contribute to particulate matter and volatile organic compound (VOC) emissions, particularly during harvest seasons. The Serra do Curral’s influence creates a bowl-like effect, potentially trapping pollutants under certain meteorological conditions, impacting air quality within Juatuba and its immediate vicinity.

Juatuba’s tropical savanna climate (Aw) dictates a distinct wet and dry season pattern, significantly impacting air quality throughout the year. The dry season, typically spanning from April to September, often sees a build-up of pollutants. Reduced rainfall and lower humidity contribute to increased particulate matter concentrations, as dust from agricultural activities and construction sites isn't effectively washed away. Temperature inversions, common during the cooler, drier months (June-August), trap pollutants near the ground, exacerbating the issue. The lack of strong winds during this period further limits dispersion. Conversely, the wet season (October to March) brings frequent rainfall, naturally cleansing the atmosphere and reducing particulate pollution. However, increased humidity can sometimes lead to elevated levels of ozone, a secondary pollutant formed through photochemical reactions involving VOCs and nitrogen oxides, particularly on sunny days. Agricultural burning, a common practice in the region to clear land for planting, is most prevalent at the transition between the dry and wet seasons (September-October), causing significant spikes in particulate matter and smoke. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season and be mindful of air quality alerts. Outdoor activities are generally more favorable during the wet season, although vigilance regarding ozone levels on warm, sunny days is still advised. The interplay of rainfall, temperature, and agricultural practices creates a dynamic air quality profile throughout the year in Juatuba.