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Sumgait occupies a strategic position on the Absheron Peninsula along Azerbaijan's Caspian Sea coast, approximately 30 kilometres northwest of Baku, forming part of the Greater Baku metropolitan region. Situated on flat coastal plains with minimal elevation variation, the city lies within Azerbaijan's primary industrial belt, characterised by extensive petrochemical complexes, oil refineries, and chemical plants that dominate its eastern and southern peripheries. This industrial concentration creates a stark urban-rural gradient, with Sumgait's dense urban core transitioning abruptly to industrial zones rather than agricultural hinterlands. The city's proximity to the Caspian Sea influences local microclimates, but this maritime adjacency fails to provide significant air cleansing effects due to prevailing wind patterns that often trap pollutants. Sumgait's location within the semi-enclosed Absheron Peninsula exacerbates air quality challenges, as topographic features limit atmospheric dispersion. Industrial emissions from Sumgait's facilities frequently mingle with pollution drifting from Baku's urban and industrial sources, creating regional pollution plumes. The city's position on major transportation corridors between Baku and northern regions ensures persistent vehicle emissions, while construction dust adds to particulate loads in this rapidly developing urban area. Sumgait's geography as a coastal industrial city on a peninsula with limited natural ventilation mechanisms creates ideal conditions for pollutant accumulation, particularly during atmospheric stagnation events.

Sumgait's air quality follows distinct seasonal patterns shaped by its cold semi-arid climate and industrial emissions profile. During winter months from November through February, pollution reaches peak levels due to frequent temperature inversions that trap industrial emissions, vehicle exhaust, and heating-related pollutants close to the ground. These inversion layers, combined with reduced atmospheric mixing and occasional fog, create hazardous conditions where particulate matter and chemical pollutants accumulate to dangerous concentrations. Sensitive groups including children, elderly residents, and those with respiratory conditions should minimise outdoor activities during these months, particularly on calm, cold days when inversion conditions are strongest. Spring brings gradual improvement as increasing temperatures and more frequent winds from the Caspian Sea enhance atmospheric dispersion, though construction dust and occasional strong winds can create short-term particulate spikes. Summer offers the cleanest air overall, with sea breezes providing natural ventilation, though ozone formation from industrial precursors can occasionally elevate pollution on hot, sunny days. Autumn sees deteriorating conditions as temperatures drop and atmospheric stability increases, with October serving as a transition month before the severe winter pollution season begins. Visitors and residents should plan outdoor activities for summer months when dispersion is optimal, while remaining vigilant for occasional pollution episodes during other seasons.