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Águas Formosas, nestled in the southeastern Brazilian state of Minas Gerais, occupies a geographically significant position within the Mantiqueira Mountains range. Its coordinates, -17.0819, -40.9358, place it at an elevation of approximately 850 meters (2,789 feet) above sea level, contributing to a cooler, more temperate climate compared to lower-lying regions of Brazil. The surrounding landscape is characterized by rolling hills, dense Atlantic Forest remnants, and small agricultural plots, creating a distinct urban–rural gradient. The city’s terrain is moderately undulating, influencing local wind patterns and potentially trapping pollutants under certain meteorological conditions. While not directly adjacent to a major river, several smaller streams and tributaries feed into the Rio Grande, providing a crucial water source for the region. Águas Formosas’ location within Minas Gerais, a state historically reliant on mining and agriculture, means it’s situated within a broader zone of economic activity. While not a major industrial hub itself, the proximity to larger urban centers and mining operations in the state can indirectly impact air quality through transported pollutants. The Atlantic Forest, though fragmented, still plays a vital role in filtering air and regulating humidity, but deforestation and agricultural expansion continue to pose threats to this natural buffer. The town’s relatively small size (population 17,845) suggests a primarily rural character, with a focus on agriculture and small-scale commerce, which generally results in lower baseline pollution levels compared to larger industrial cities, but localized agricultural practices can still contribute to emissions.

Águas Formosas experiences a tropical savanna climate, characterized by distinct wet and dry seasons rather than the four traditional seasons. The dry season, typically spanning from April to September, often brings a noticeable increase in particulate matter. This is largely due to reduced rainfall, which limits the natural cleansing effect of precipitation, and increased agricultural burning practices used for land clearing and crop residue removal. The drier air also promotes the formation of temperature inversions, particularly during the cooler months of June and July, where a layer of warm air traps cooler air (and pollutants) near the ground. These inversions can significantly worsen air quality, leading to stagnant conditions and increased concentrations of smoke and dust. The wet season, from October to March, brings frequent rainfall and higher humidity, naturally dispersing pollutants and improving air quality. However, intense storms can occasionally stir up dust and soil, leading to temporary spikes in particulate matter. Fog, common during the cooler, drier months, can also exacerbate air quality issues by trapping pollutants close to the ground. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of agricultural burning or when temperature inversions are present. Limiting outdoor exertion and avoiding areas with visible smoke are advisable. During the wet season, while generally cleaner, awareness of potential dust events following storms remains important.