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Kartal is a major district on Istanbul's Asian side, positioned along the northern coast of the Sea of Marmara where the urban fabric meets the Marmara shoreline. This coastal location at approximately 40 meters elevation creates a distinctive geography where the Kartal plains transition into the rising terrain of the Aydos Forest to the east, establishing an urban-rural gradient that influences local air circulation patterns. Kartal sits within Istanbul's broader industrial belt, historically hosting manufacturing facilities that have evolved alongside residential expansion, creating mixed land-use zones where industrial emissions intersect with dense urban traffic corridors. The district's position between the sea and forested hills creates microclimatic conditions where marine breezes from the Marmara can disperse pollutants, but topographic features can also trap emissions during certain weather patterns. Proximity to major transportation arteries including the D100 highway and ongoing urban development projects contribute to mobile and construction-related pollution sources. The coastal orientation means Kartal experiences both the cleansing effects of sea winds and the potential for maritime transport emissions, while its location within the greater Istanbul metropolitan area subjects it to regional pollution transport from the city's western industrial zones under prevailing wind conditions.

Kartal's air quality follows distinct seasonal patterns shaped by Istanbul's transitional climate between Mediterranean and oceanic influences. During winter months from December through February, colder temperatures and frequent temperature inversions create stable atmospheric conditions that trap pollutants near the surface, particularly when weak winds fail to disperse emissions from heating systems and traffic. These months often see the highest pollution concentrations, making outdoor activities less advisable especially for sensitive groups like children, elderly residents, and those with respiratory conditions. Spring brings gradual improvement as increasing temperatures and more frequent rainfall in March and April help cleanse the atmosphere, though pollen from the surrounding Aydos Forest can create additional challenges for allergy sufferers. Summer months from June through August benefit from consistent sea breezes off the Marmara that effectively disperse pollutants, creating generally better air quality despite increased ozone formation on hot, sunny days. Autumn presents a transitional period where decreasing temperatures and changing wind patterns in October and November can lead to pollution accumulation, particularly during calm periods before winter precipitation begins. Sensitive residents should monitor local air quality reports during seasonal transitions and consider indoor activities during prolonged high-pressure systems that limit atmospheric mixing.