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Sultanhisar, nestled within Aydın Province in southwestern Turkey, occupies a geographically significant position within the fertile Maeander River basin. Located at approximately 37.8897° N, 28.1575° E, the town sits at an elevation of roughly 185 meters (607 feet) above sea level, contributing to a generally mild climate. The surrounding landscape is dominated by agricultural plains, a legacy of the ancient Maeander’s meandering course, now largely controlled by irrigation systems. This intensive agricultural activity, particularly the cultivation of olives, figs, and cotton, plays a crucial role in the regional economy and, consequently, influences local air quality. To the north and west, gently rolling hills transition into the more rugged terrain of the Aydın Mountains, impacting prevailing wind patterns. While Sultanhisar itself is a relatively small town with a population of around 20,230, it lies within a broader agricultural belt extending across Aydın Province, connecting it to larger urban centers like Aydın city. The urban–rural gradient is gradual, with smaller villages and agricultural fields directly bordering the town. The absence of major heavy industries within Sultanhisar itself mitigates some pollution risks, however, agricultural practices, including the use of fertilizers and pesticides, and occasional burning of crop residues, can contribute to localized air quality concerns. The proximity to the Aegean Sea, approximately 60 kilometers (37 miles) to the west, introduces a maritime influence, moderating temperatures and occasionally bringing in sea breezes that can disperse pollutants, though also potentially carrying coastal aerosols.

Sultanhisar’s air quality experiences a distinct seasonal cycle dictated by its Mediterranean climate. Summers (June-August) are characterized by high temperatures and prolonged periods of sunshine, often accompanied by stagnant air conditions. The intense heat can exacerbate ground-level ozone formation, a secondary pollutant resulting from reactions involving sunlight and precursor gases emitted from agricultural activities and distant urban areas. This period typically sees a noticeable increase in particulate matter, stemming from dust lifted by dry winds and occasional agricultural burning. Spring (March-May) and Autumn (September-November) generally offer the most favorable air quality, with moderate temperatures and more frequent wind patterns that help to disperse pollutants. However, spring can also bring pollen concentrations, impacting respiratory health. Winters (December-February) are relatively mild and wet, with occasional fog, which can trap pollutants near the ground, leading to temporary reductions in visibility and localized air quality degradation. Temperature inversions, where a layer of warm air sits above cooler air, are less frequent than in colder climates but can still occur, particularly during calm winter nights, preventing vertical mixing and concentrating pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the hot, dry summer months and be mindful of potential fog events in winter. Outdoor activities are generally best enjoyed during the transitional spring and autumn seasons, taking advantage of the improved ventilation and moderate temperatures.