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Shouguang occupies a strategic position in northern Shandong Province, China, situated on the vast North China Plain approximately 100 kilometers inland from the Bohai Sea. The city's coordinates at 36.8570°N, 118.7910°E place it within the fertile alluvial plain formed by the Yellow River, with an average elevation of just 20-30 meters above sea level, creating a flat topography that significantly influences air quality dynamics. Shouguang's urban character is defined by its dual identity as both a major agricultural hub—famously known as China's 'vegetable capital' with extensive greenhouse networks—and an emerging industrial center within the broader Shandong industrial belt. The city lies along the Jiaoji Railway corridor between Jinan and Qingdao, positioning it within one of China's most economically active regions. This location creates a distinct urban-rural gradient where dense agricultural activity transitions into urban industrial zones, contributing to complex pollution mixtures. Proximity to the Bohai Sea provides some maritime influence, but the city's inland position means it receives less direct coastal cleansing than port cities. The surrounding landscape is predominantly flat agricultural land with limited topographical features to disperse pollutants, while the city's position downwind of major industrial centers in central Shandong can lead to transported pollution. The combination of intensive agriculture with associated biomass burning and fertilizer emissions, growing industrial activity including food processing and manufacturing, and increasing vehicular traffic creates multiple pollution sources that interact with the region's meteorological patterns.

Shouguang's air quality follows distinct seasonal patterns shaped by the East Asian monsoon climate and local meteorological conditions. During winter (December-February), pollution typically peaks due to several converging factors: increased heating demand leads to higher emissions from coal and biomass burning, while frequent temperature inversions trap pollutants close to the ground in the stable atmospheric conditions. Cold, stagnant air with light winds from the northwest allows particulate matter to accumulate, making these months particularly challenging for air quality. Sensitive groups should limit prolonged outdoor exposure during winter smog episodes. Spring (March-May) brings gradual improvement as temperatures rise and wind patterns become more variable, though dust storms from the Gobi Desert can occasionally affect the region in early spring. Summer (June-August) offers the cleanest air despite higher temperatures, as the East Asian summer monsoon brings southeasterly winds from the ocean, increased precipitation that washes pollutants from the atmosphere, and stronger vertical mixing that prevents stagnation. This is the optimal season for outdoor activities. Autumn (September-November) sees a transitional period where decreasing temperatures and shifting wind patterns begin to create conditions conducive to pollution buildup, particularly in late autumn when heating season commences and atmospheric stability increases. Throughout the year, morning fog can combine with pollution to create reduced visibility conditions, while the flat terrain offers little natural ventilation. Residents with respiratory conditions should monitor daily air quality reports and plan outdoor activities for afternoons when mixing is typically better.