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Khartsyzk, situated in the Donetska Oblast of Ukraine (coordinates 48.0428, 38.1425), occupies a geographically significant position within the Donbas region, a historically industrial heartland. The city’s terrain is characterized by gently rolling plains, typical of the broader steppe landscape that dominates much of southeastern Ukraine. Elevation averages around 180 meters above sea level, contributing to a relatively stable atmospheric layer, though this can also exacerbate pollution accumulation under certain conditions. Khartsyzk lies approximately 15 kilometers north of the Siverskyi Donets River, a major waterway that influences local climate and potentially disperses pollutants, though its impact is moderated by the surrounding urban and agricultural development. The city’s urban fabric is largely defined by its legacy as a coal mining and metallurgical center, with a dense network of industrial zones and residential areas reflecting this history. Surrounding Khartsyzk is a mosaic of agricultural land – primarily grain and sunflower cultivation – and smaller settlements, creating a gradual urban-rural gradient. The proximity to the extensive Donbas industrial belt, including larger cities like Kramatorsk and Pokrovsk, means Khartsyzk shares a regional air quality profile influenced by broader industrial emissions. The flat topography limits natural ventilation, and the prevalence of coal-fired power plants and heavy industry within the region collectively contribute to a heightened potential for localized air pollution episodes, particularly during periods of meteorological stagnation. The landscape is dominated by flat agricultural fields and the remnants of mining infrastructure, shaping the city's visual character and influencing its microclimate.

Khartsyzk’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological patterns. Winter (December-February) typically presents the most challenging conditions. Cold temperatures lead to increased residential heating reliant on coal and other solid fuels, adding to particulate matter pollution. Furthermore, frequent temperature inversions trap pollutants close to the ground, resulting in prolonged periods of poor air quality. Fog, common during these months, further concentrates pollutants. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, aiding in pollutant dispersion. However, agricultural activities, including fertilizer application, can introduce ammonia and other agricultural pollutants. Summer (June-August) generally offers the best air quality, with warmer temperatures promoting atmospheric mixing and frequent rainfall helping to cleanse the air. However, heatwaves can lead to stagnant air and ozone formation. Autumn (September-November) sees a return to more challenging conditions as temperatures cool and wind patterns become less predictable. Agricultural burning, a traditional practice in the region, can significantly degrade air quality during this period. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter and autumn months, limiting outdoor exposure and avoiding strenuous activity when air quality is visibly poor. During the warmer months, monitoring for ozone alerts is advisable. The interplay of industrial emissions, agricultural practices, and prevailing weather systems dictates the annual air quality narrative in Khartsyzk, demanding proactive mitigation strategies and public awareness.