Lima Duarte Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Lima Duarte, nestled in the mountainous heart of Minas Gerais, Brazil, presents a unique geographic context influencing its air quality. Situated at coordinates -21.8428, -43.7928, the city occupies a relatively high elevation within the Serra da Mantiqueira range, approximately 820 meters above sea level. This terrain significantly impacts atmospheric circulation, potentially trapping pollutants during temperature inversions. The surrounding landscape is characterized by rolling hills, interspersed with patches of Atlantic Forest remnants, and agricultural lands dedicated primarily to coffee and dairy farming. While not directly adjacent to major industrial belts, the regional economy relies on mining and processing activities further afield, contributing to background particulate matter levels. The urban-rural gradient is quite sharp; the city centre is compact, quickly transitioning to rural landscapes dominated by agriculture and forested areas. The lack of significant bodies of water nearby means limited evaporative cooling, potentially exacerbating heat-related pollution formation in warmer months. The city’s position within a valley can also restrict wind flow, hindering pollutant dispersion. Understanding these geographical factors is crucial for assessing and mitigating air quality challenges in Lima Duarte.

Lima Duarte experiences a distinct wet and dry season, heavily influencing air quality patterns. The dry season, typically from April to September, sees significantly reduced rainfall and increased dust resuspension from agricultural activities and unpaved roads, leading to higher particulate matter concentrations. Lower humidity also means pollutants are less likely to be scavenged by precipitation. August and September are often the months with the poorest air quality. Conversely, the wet season, from October to March, brings frequent rainfall which effectively washes pollutants from the atmosphere, improving air quality. However, increased humidity can also promote the formation of secondary pollutants like ozone, particularly on sunny days. November and December often experience calmer winds, potentially leading to localized pollution build-up. Sensitive groups, including children, the elderly, and those with respiratory conditions, should exercise caution during the dry season, limiting strenuous outdoor activity on dusty days. During the wet season, monitoring ozone levels is advisable. Temperature inversions, common during the cooler months, can trap pollutants at ground level regardless of the season, requiring vigilance.