Nova Russas Air Quality Index (AQI)

Loading live AQI data...

Loading weather snapshot...

Loading historical AQI trends...

Nova Russas, nestled in the interior of Ceará state, Brazil, occupies a strategic position within the broader Northeast region. Located at approximately -4.7000 latitude and -40.5667 longitude, the city’s geography is characterized by a gently undulating terrain typical of the Sertão biome. This arid landscape, historically shaped by fluctuating rainfall patterns, transitions gradually from scrubland and dry forests to more cultivated areas closer to the urban center. The surrounding landscape is predominantly semi-arid, punctuated by occasional seasonal streams and the Rio da Integração, which influences local microclimates. Elevation ranges modestly, generally between 200 and 400 meters above sea level, contributing to relatively stable atmospheric conditions, though susceptible to temperature inversions during cooler months. Nova Russas sits inland, far from the immediate coastal influence of the Atlantic Ocean, meaning maritime breezes are less frequent, potentially trapping pollutants. The urban–rural gradient is noticeable; agricultural activities, primarily focused on livestock and rain-fed crops like corn and beans, are prevalent in the periphery, with occasional small-scale industrial operations related to agricultural processing. While not situated within a major industrial belt, the city’s growth and vehicular traffic contribute to localized air quality concerns. The Sertão’s dry climate, with its low humidity and limited vegetation cover, can exacerbate dust and particulate matter issues, particularly during periods of wind and soil disturbance. The region's geology, with exposed sedimentary rock, also contributes to naturally occurring dust.

Nova Russas experiences a distinctly tropical climate with a pronounced wet and dry season, rather than the four traditional seasons. The dry season, typically spanning from July to November, is characterized by intense solar radiation, high temperatures, and minimal rainfall. This period often sees a noticeable increase in particulate matter pollution, largely due to wind-driven dust from surrounding agricultural lands and unpaved roads. The lack of rainfall means limited atmospheric cleansing, allowing dust and other pollutants to accumulate. Temperature inversions, common during the cooler nights of this season, can trap pollutants near the ground, worsening air quality. Conversely, the wet season (December to June) brings relief. Frequent rainfall effectively washes pollutants from the atmosphere, significantly improving air quality. The increased humidity also helps to suppress dust generation. However, periods of intense rainfall can lead to localized flooding and the release of mold spores, potentially impacting indoor air quality. During the transition months (May/June and October/November), variable wind patterns and fluctuating humidity levels can lead to unpredictable air quality episodes. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak sunlight hours and avoiding areas with high dust levels. The months of August to October often present the most challenging air quality conditions, while February to April generally offer the cleanest air.