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Chorzów, nestled within the Silesian Voivodeship of southern Poland, occupies a geographically complex position within the Upper Silesian Metropolitan Area. Its coordinates (50.3000, 18.9500) place it on the edge of the historical industrial heartland of Poland, a region characterized by a legacy of coal mining and heavy industry. The city’s terrain is gently undulating, part of the Silesian Upland, with elevations ranging from approximately 210 to 300 meters above sea level. This relatively low elevation, combined with the surrounding topography, can contribute to localized air quality challenges. Chorzów is bordered by Katowice to the west, Ruda Śląska to the north, and Bytom to the east, forming a densely populated urban continuum. To the south, the landscape gradually transitions to more rural areas and agricultural fields, though these are increasingly interspersed with industrial zones. The Oder River, though not directly flowing through Chorzów, is nearby, influencing regional weather patterns and providing a potential pathway for pollutant transport. Historically, the area’s geography facilitated coal extraction, and the remnants of mining activity, including subsidence and spoil heaps, continue to shape the landscape. The urban–rural gradient is relatively abrupt, with the city rapidly transitioning to agricultural land and smaller villages. This proximity to both intensive industrial activity and agricultural zones creates a unique set of environmental pressures, impacting air quality and overall ecosystem health. The Silesian Basin's geological structure, with its layered sedimentary rocks, also influences groundwater flow and potential soil contamination, indirectly affecting air quality through dust resuspension.

Chorzów’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Winter, spanning December to February, typically presents the most challenging period. Cold temperatures lead to increased heating demand, primarily reliant on coal and other solid fuels in residential areas, significantly elevating particulate matter concentrations. Furthermore, frequent temperature inversions trap pollutants close to the ground, exacerbating the problem. Fog, common during these months, further reduces atmospheric dispersion. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, dispersing pollutants more effectively. However, agricultural activities, including fertilizer application, can introduce ammonia into the air. Summer (June-August) generally offers the best air quality, with warm temperatures, consistent winds, and frequent rainfall helping to cleanse the atmosphere. However, occasional heatwaves can lead to ozone formation, a secondary pollutant. Autumn (September-November) sees a return to more challenging conditions as temperatures cool, and the burning of agricultural waste becomes more prevalent. The transition months of October and November are particularly susceptible to stagnant air and elevated particulate levels. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during winter mornings and days with poor visibility. During the warmer months, monitoring ozone levels and avoiding strenuous activity during peak ozone hours is advisable. Public health advisories are often issued during periods of elevated pollution, recommending reduced outdoor exposure and the use of air purifiers.