Baku Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Baku, the capital of Azerbaijan, occupies a unique geographical position on the western shore of the Caspian Sea, nestled within the Absheron Peninsula. This coastal location profoundly influences its urban character and air quality dynamics. The city sits at a relatively low elevation, averaging around 28 meters above sea level, with terrain that transitions from flat coastal plains to gentle hills inland, creating a natural basin effect that traps pollutants. Baku's urban fabric is densely concentrated, with sprawling industrial zones, particularly in the eastern and southern suburbs, where oil refineries, petrochemical plants, and shipping facilities cluster along the Caspian shoreline. This industrial belt, combined with heavy vehicular traffic in the city center, generates significant emissions. The surrounding landscape is predominantly arid, with limited vegetation to absorb pollutants, while the Caspian Sea to the east and the semi-desert hinterland to the west create a distinct urban–rural gradient. Proximity to the sea moderates temperatures but also contributes to industrial emissions from maritime activities. The city's position in a seismically active zone further complicates infrastructure, occasionally disrupting pollution control measures. This geographical setting, marked by industrial concentration, topographic trapping, and coastal influences, makes Baku particularly vulnerable to air quality degradation, especially during periods of atmospheric stagnation.

Baku's air quality follows a distinct seasonal pattern driven by its cold semi-arid climate and meteorological conditions. In winter, from November to February, pollution peaks due to a combination of factors: temperature inversions are common, trapping pollutants near the surface, while calm winds and frequent fog reduce dispersion. Heating demands increase emissions from industrial and residential sources, exacerbating particulate matter and sulfur dioxide levels. Sensitive groups, such as children, the elderly, and those with respiratory conditions, should limit outdoor activities during these months, especially on still, foggy days. Spring, from March to May, brings gradual improvement as temperatures rise and winds pick up, aiding pollutant dispersal, though occasional dust storms from the surrounding arid lands can spike particulate levels. Summer, from June to August, sees the cleanest air, with strong sea breezes from the Caspian and higher atmospheric mixing heights effectively clearing pollutants; this is the best time for outdoor activities. Autumn, from September to October, marks a transition, with decreasing winds and increasing humidity leading to a buildup of pollutants, setting the stage for winter peaks. Year-round, vulnerable individuals should monitor local air quality reports and use masks during high-pollution episodes, particularly in industrial areas.