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Pingliang occupies a distinctive position in eastern Gansu Province, situated at the convergence of the Loess Plateau and the Liupan Mountains, with coordinates placing it approximately 1,400 meters above sea level. This elevated basin location creates a semi-enclosed topography that significantly influences air quality patterns. The city lies along the upper reaches of the Jing River, a tributary of the Yellow River system, though water bodies are limited in scale to moderate pollution dispersion. Pingliang functions as a regional administrative and economic hub within the Longdong region, characterized by an urban-rural gradient where the compact urban core transitions rapidly to agricultural lands and pastoral areas. The surrounding landscape consists of deeply eroded loess hills and terraced farmland, with the Liupan Mountains to the southwest creating partial topographic barriers. This geography traps pollutants under stable atmospheric conditions, particularly during winter months when temperature inversions form in the basin. The city's position along historical trade routes has evolved into modern transportation corridors, with industrial activities concentrated in the urban periphery, including small-scale manufacturing and processing facilities typical of inland Chinese cities. Agricultural burning in surrounding rural areas contributes seasonal particulate matter, while the loess soil itself can become suspended during dry, windy periods. Pingliang's location away from major industrial belts like the Guanzhong Plain provides some relative insulation from transboundary pollution, but local emissions accumulate efficiently in the basin's confined airshed.

Pingliang's air quality follows a pronounced seasonal rhythm shaped by its continental climate and topographic setting. Winter (December-February) brings the most challenging conditions, as strong temperature inversions develop in the basin, trapping pollutants from heating emissions and limited industrial activity. Cold, stagnant air with frequent fog episodes creates persistent haze, making these months particularly problematic for respiratory health. Spring (March-May) sees gradual improvement as increasing solar radiation breaks up inversions, though March and April experience occasional dust storms when strong winds lift loess soil from surrounding farmlands. Summer (June-August) offers the cleanest air, with monsoon-influenced rainfall from the southeast helping to wash pollutants from the atmosphere, while convective mixing disperses local emissions. This season provides optimal conditions for outdoor activities. Autumn (September-November) begins with relatively good air quality but deteriorates through October and November as temperatures drop, inversions reestablish, and agricultural burning after harvest contributes particulate matter. Sensitive groups including children, elderly residents, and those with pre-existing respiratory or cardiovascular conditions should limit prolonged outdoor exposure during winter months and spring dust events, while summer presents the safest window for physical activity. Indoor air purification becomes particularly valuable during peak pollution periods from late autumn through early spring.