Santaluz Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Santaluz, Bahia, nestled in the semi-arid interior of northeastern Brazil at coordinates -11.2558, -39.3750, presents a unique geographic context influencing its air quality. The city sits within the broader Agreste region, a transitional zone between the humid coastal Mata Atlântica forest and the drier Sertão. The terrain is characterised by rolling hills and plateaus, with elevations ranging between 200-400 meters, contributing to localised variations in air circulation. Santaluz is not directly coastal, lying approximately 150km inland from the Atlantic Ocean, diminishing the moderating influence of marine air masses. The surrounding landscape is dominated by Caatinga scrubland, interspersed with small-scale agriculture – primarily subsistence farming and livestock raising. While Santaluz isn’t a major industrial hub, regional economic activity centres around agriculture and some light processing of agricultural products. The urban-rural gradient is relatively sharp; the city itself is compact, with a population of 37,834, quickly giving way to rural landscapes. Dust from agricultural activities and unpaved roads, coupled with seasonal wildfires in the Caatinga, are significant contributors to particulate matter. The city’s location within a valley can also exacerbate pollution events by trapping air masses, particularly during periods of calm weather. This geographical setting dictates the specific challenges to maintaining good air quality in Santaluz.

Santaluz experiences a distinct wet and dry season, rather than traditional four seasons. Air quality in Santaluz is most compromised during the prolonged dry season, typically from August to December. This period sees minimal rainfall, leading to increased dust resuspension from agricultural lands and unpaved roads. The dry air also facilitates the spread of wildfires in the surrounding Caatinga biome, releasing significant amounts of particulate matter and gaseous pollutants. Temperature inversions, common during the cooler nights of the dry season, trap pollutants near ground level, worsening air quality. January to April marks the wet season, bringing relief from dust and smoke. Rainfall effectively washes pollutants from the atmosphere, and increased humidity reduces dust resuspension. However, even during the wet season, localised pollution can occur from vehicle emissions and small-scale burning of agricultural waste. May to July represents a transitional period with improving, but still variable, air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should exercise caution during the peak of the dry season (September-November), limiting strenuous outdoor activity. Monitoring wind patterns is crucial; winds from the west often carry smoke from wildfires. The wet season offers the most favourable conditions for outdoor activities.