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Shelekhov is a strategic industrial hub situated in the heart of the Irkutskaya Oblast’, positioned as a satellite city to the regional capital, Irkutsk. Nestled within the vast expanse of the East Siberian taiga, the city is defined by its proximity to the Angara River, which provides both a critical transport artery and a source of cooling for its heavy industrial complexes. The terrain is characterized by undulating plains and dense coniferous forests that encircle the urban core, creating a distinct urban-rural gradient where industrial zones transition abruptly into wild wilderness. This geographic arrangement plays a pivotal role in the city's air quality dynamics. The surrounding hills and the dense forest canopy can act as physical barriers, trapping pollutants within the lower atmospheric layers. Because Shelekhov is situated in a region prone to significant temperature fluctuations, the local topography often facilitates the formation of stagnant air masses. The industrial belt, dominated by aluminum smelting and chemical processing, releases a steady stream of particulate matter and gaseous pollutants that often linger over the residential districts. The interaction between the river valley's humidity and the industrial output frequently creates a localized haze. Consequently, the city’s air quality is not merely a product of its emissions but is deeply intertwined with the Siberian landscape, where the lack of strong, consistent ventilation allows industrial plumes to settle, affecting the health of the local population.

In Shelekhov, the air quality narrative is dictated by the extreme continental climate of Siberia. Winter is the most challenging season, characterized by severe cold and the frequent occurrence of temperature inversions. During these events, a layer of warm air traps colder, pollutant-heavy air near the ground, concentrating emissions from coal-fired boilers and industrial stacks. This creates a persistent winter smog, making January and February the worst months for outdoor activity, especially for those with respiratory conditions. As spring arrives, the thawing of the permafrost and the movement of snow bring a transition; however, wind-blown dust and the initial awakening of industrial activity can keep particulate levels elevated. Summer offers a temporary reprieve from heating emissions, but it introduces the threat of colossal wildfires in the surrounding taiga. Smoke from these distant or nearby blazes often blankets the city in a thick, acrid haze, spiking particulate matter levels and triggering health warnings for sensitive groups. Autumn marks a return to atmospheric stability as the region cools. While the air is often crisp and clear in September, the onset of the first frosts in October triggers the reactivation of domestic heating systems, leading to a gradual rise in pollution. For sensitive individuals, the peak of summer fire season and the depth of winter inversions are the most hazardous periods, necessitating the use of air filtration and reduced physical exertion during severe smog alerts.