Alexandria Air Quality Index (AQI)

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Alexandria, Egypt's second-largest city and primary Mediterranean port, occupies a narrow strip of land between Lake Mariout to the south and the Mediterranean Sea to the north, creating a distinctive coastal urban environment that profoundly influences its air quality. Situated on Egypt's northern coast approximately 180 kilometers northwest of Cairo, the city stretches along a low-lying coastal plain with minimal elevation variation, typically ranging from sea level to just 5 meters above, which limits natural ventilation and pollutant dispersion. Alexandria's strategic position as Egypt's maritime gateway means it hosts one of the Mediterranean's busiest ports, with shipping emissions directly impacting coastal air quality, while the city's industrial zones concentrate along its eastern and western peripheries, creating pollution corridors that affect residential areas. The surrounding landscape transitions rapidly from dense urban fabric to agricultural land and then desert, creating sharp urban-rural gradients that influence pollution transport. The Mediterranean Sea moderates temperatures but also contributes sea salt aerosols that interact with urban pollutants, while the city's position at the Nile Delta's western edge exposes it to agricultural dust from nearby farmlands. Alexandria's linear coastal development pattern, with major transportation arteries running parallel to the shoreline, concentrates vehicle emissions along specific corridors, and the city's dense urban core experiences heightened pollution due to building canyon effects that trap pollutants near ground level.

Alexandria's air quality follows distinct seasonal patterns shaped by its Mediterranean climate and urban emissions. During winter months from November through February, pollution peaks as cooler temperatures create frequent temperature inversions that trap vehicle exhaust, industrial emissions, and port-related pollutants near the surface, compounded by reduced wind speeds and occasional fog that further limit dispersion. These months present the greatest respiratory challenges, particularly for sensitive groups like children, elderly residents, and those with pre-existing conditions, who should limit prolonged outdoor exposure during morning hours when inversion layers are strongest. Spring brings gradual improvement as increasing temperatures and more frequent northerly winds from the Mediterranean help disperse pollutants, though March and April may experience occasional sandstorms carrying desert dust from the Western Desert. Summer months from June through August see reduced pollution levels despite intense heat, as consistent sea breezes provide natural ventilation, though ozone formation may increase during afternoon hours. Autumn marks a transition period with pollution beginning to accumulate as meteorological conditions become more stagnant. For optimal outdoor activity, late spring through early autumn offers better air quality, while winter requires careful timing of activities to avoid peak pollution periods, with sensitive individuals particularly advised to monitor daily conditions during the high-pollution season.