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Nilüfer, situated as a northwestern district of Bursa in Turkey's Marmara Region, occupies a strategically significant position at the foothills of Uludağ Mountain, with coordinates placing it approximately 40.2833°N and 28.9500°E. This urban area, part of Turkey's fourth-largest metropolitan region, lies within the fertile Bursa Plain, characterized by gently rolling terrain that gradually ascends toward the mountainous south, where Uludağ rises to over 2,500 meters, creating a dramatic topographic contrast. The district's elevation averages around 100 meters above sea level, positioning it in a transitional zone between coastal influences and inland continental effects. Proximity to the Sea of Marmara, about 30 kilometers north, moderates temperatures but also introduces maritime air masses that can trap pollutants under certain conditions. Nilüfer functions as both a residential suburb and an industrial hub within Bursa's broader manufacturing belt, known for automotive, textile, and machinery production, which contributes significantly to urban emissions. The urban-rural gradient is pronounced, with dense residential neighborhoods in the north gradually giving way to agricultural zones and forested mountain slopes to the south, where olive groves and fruit orchards dominate. This geographic setting specifically affects air quality through temperature inversions common in the valley-like plain, especially during winter, when cold air drains from Uludağ and settles over the city, trapping vehicular and industrial pollutants. Additionally, the district's location downwind of Bursa's industrial core can lead to pollutant transport, while limited air circulation in the basin exacerbates particulate matter accumulation, making geographic factors a key determinant of local air pollution dynamics.

In Nilüfer, air quality follows a distinct seasonal pattern shaped by local meteorology and urban activities. During winter, from December to February, pollution typically peaks due to increased heating demand, with residents relying on coal and natural gas, coupled with frequent temperature inversions that trap pollutants near the surface. Cold, stagnant air from Uludağ settles over the Bursa Plain, reducing dispersion and leading to elevated particulate matter levels; sensitive groups like children, the elderly, and those with respiratory conditions should limit outdoor exertion on calm, foggy days. Spring, from March to May, brings gradual improvement as temperatures rise and precipitation increases, with rain helping to wash pollutants from the air, though occasional dust events from arid regions can temporarily degrade air quality. Summer, from June to August, sees lower pollution levels overall due to stronger breezes from the Sea of Marmara and more active atmospheric mixing, but ozone formation may increase on hot, sunny days, particularly in July and August, making early mornings or evenings better for outdoor activities. Autumn, from September to November, marks a transition with rising pollution as heating season begins and atmospheric stability returns, with October and November often experiencing smog episodes; health guidance recommends monitoring local air quality reports and using masks during peak commute hours. Throughout the year, wind patterns play a crucial role, with northerly winds aiding dispersion but southerly flows sometimes carrying industrial emissions from Bursa's core into Nilüfer, underscoring the need for seasonal awareness among residents.