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Druten, nestled within the province of Gelderland in the Netherlands, occupies a geographically significant position at the confluence of the Meuse and Maas-Waal rivers. Its coordinates (51.8889, 5.6044) place it within a relatively flat, alluvial plain characteristic of the Dutch riverlands. The surrounding landscape is predominantly agricultural, a patchwork of fertile fields cultivated with grains, potatoes, and sugar beets, contributing to a strong rural character. Druten’s urban fabric is compact and traditional, featuring a historic town centre with characteristic brick buildings and canals, reflecting its medieval origins as a trading post. The urban–rural gradient is gradual; the town seamlessly blends into the surrounding agricultural areas, with scattered farms and orchards defining the immediate periphery. Elevation is minimal, rarely exceeding 15 meters above sea level, which influences local weather patterns and can exacerbate air quality issues during stagnant conditions. While not directly adjacent to major industrial belts, Druten’s proximity to the Maas-Waal corridor, a vital transportation artery for goods and freight, means it experiences some indirect impacts from vehicular emissions. The Meuse and Maas-Waal rivers themselves, while providing scenic beauty and recreational opportunities, can also contribute to localised humidity and fog formation, impacting pollutant dispersion. The flat terrain and riverine setting mean that air pollutants, particularly those released at ground level, tend to linger longer, especially during periods of low wind speed, making Druten susceptible to localised air quality challenges.

Druten’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Spring (March-May) often brings a gradual improvement as temperatures rise and winds increase, dispersing accumulated pollutants. However, this period can also be punctuated by episodes of elevated pollen counts, impacting respiratory health. Summer (June-August) generally sees good air quality due to consistent winds and convective mixing, though heatwaves can lead to temperature inversions, trapping pollutants near the ground, particularly in the evenings. Autumn (September-November) presents a more complex picture. While wind speeds remain relatively high, cooler temperatures and increased humidity can lead to fog formation, especially in the mornings, hindering pollutant dispersion and creating localised pockets of poor air quality. Agricultural activities, such as harvesting and fertiliser application, can also contribute to ammonia emissions during this season. Winter (December-February) is typically the most challenging period. Cold, stable air masses frequently result in temperature inversions, trapping pollutants close to the surface. Reduced wind speeds and increased residential heating contribute to elevated levels of particulate matter and nitrogen oxides. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit prolonged outdoor activity during these periods, particularly on days with low visibility or a noticeable odour. Maintaining indoor air quality through ventilation and air purification can also be beneficial. The interplay of these factors dictates that spring and autumn require careful monitoring, while winter demands heightened vigilance regarding air quality impacts.