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Novaya Usman’, nestled within Voronezhskaya Oblast’ in southwestern Russia, occupies a gently undulating landscape characteristic of the East European Plain. Situated at coordinates 51.6450, 39.4142, the city’s elevation is relatively low, contributing to potential air stagnation. The Don River flows nearby, influencing local humidity and occasionally trapping pollutants during temperature inversions. The surrounding terrain is predominantly agricultural, with extensive fields of grain and sunflowers dominating the landscape. This agricultural activity, while vital to the regional economy, introduces particulate matter from harvesting and soil erosion, impacting local air quality. Novaya Usman’ is not a major industrial hub itself, but its proximity to Voronezh, a significant industrial centre approximately 30km to the north, means it can experience pollutant transport from that source. The urban-rural gradient is fairly sharp; the city is compact, transitioning quickly to open farmland. This proximity to agricultural land and a larger industrial city creates a complex interplay of local and transported pollution sources. The prevailing winds, generally from the west, can carry pollutants from Voronezh towards Novaya Usman’, exacerbating air quality concerns. Understanding these geographical factors is crucial for assessing and mitigating pollution risks.

Novaya Usman’ experiences a continental climate, with distinct seasonal variations impacting air quality. Winter (December-February) sees the most stable atmospheric conditions, often with temperature inversions trapping pollutants near the ground, particularly from residential heating using coal and wood. Reduced sunlight also limits pollutant dispersion. Spring (March-May) brings increased agricultural activity – plowing and fertilizer application – raising particulate matter levels. Frequent rainfall can temporarily improve air quality, but also creates muddy conditions contributing to road dust. Summer (June-August) generally offers the best air quality, with higher temperatures promoting dispersion and prevailing winds carrying pollutants away. However, heatwaves can exacerbate ozone formation. Autumn (September-November) is marked by the harvesting season, again increasing particulate matter, and the return to heating systems. October and November often see foggy conditions, trapping pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and peak agricultural periods. Monitoring weather forecasts and avoiding outdoor exertion on still, cold days is advisable. The months of June, July, and August typically present the most favourable conditions for outdoor activities.