Resplendor Air Quality Index (AQI)

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Resplendor, nestled in the state of Minas Gerais, Brazil, occupies a unique geographic position at coordinates -19.3258, -41.2550. The city’s terrain is characterized by rolling hills and valleys typical of the Iron Quadrangle region, a historically significant area for mining. Situated approximately 250-300 meters above sea level, Resplendor benefits from a moderate elevation, but this also influences air circulation patterns. The surrounding landscape is a mosaic of remnant Atlantic Forest, pastureland dedicated to cattle ranching, and areas impacted by iron ore extraction. The nearby Doce River, tragically affected by the 2015 Mariana dam disaster, plays a crucial role in the regional hydrology, though its water quality and sediment transport now significantly impact the local ecosystem. Resplendor’s relatively small population of 17,226 suggests a strong urban-rural gradient, with agricultural activities and mining operations dominating the periphery. The city itself is a developing urban center, experiencing growth linked to the mining industry. Air quality is particularly vulnerable due to the combination of localized industrial emissions, dust from mining activities, and the potential for temperature inversions in the valleys, trapping pollutants near the ground. The prevailing winds, influenced by the regional topography, can either disperse or concentrate these emissions, impacting air quality across the municipality.

Resplendor experiences a distinct wet and dry season, rather than traditional four seasons. The dry season, typically from May to September, presents the most challenging air quality conditions. Reduced rainfall means less atmospheric cleansing, allowing particulate matter from mining operations and vehicle emissions to accumulate. Lower humidity also contributes to increased dust suspension. August and September are often the months with the poorest air quality, coinciding with peak agricultural burning for land preparation. The wet season, from October to April, brings significant improvements. Frequent rainfall effectively washes pollutants from the atmosphere, and higher humidity suppresses dust. However, even during the wet season, localized pollution events can occur, particularly after periods of intense mining activity. November and December generally offer the most favourable conditions for outdoor activity. Sensitive groups – children, the elderly, and individuals with respiratory conditions – should exercise caution during the dry season, limiting strenuous outdoor activity and monitoring their health. Temperature inversions, common during cooler nights throughout the year, can exacerbate pollution episodes by trapping pollutants at ground level, regardless of the season. Fog, prevalent during the cooler months, can also contribute to increased particulate matter concentrations.