|Area||528 km2 (204 sq mi)|
Ahvaz is a city in the southwest of Iran. Ahvaz has the world's worst air pollution according to a survey by the World Health Organization in 2011
Ahvaz is built on the banks of the Karun River and is situated in the middle of Khuzestan Province, of which it is the capital and most populous city. The city has an average elevation of 20 meters above sea level.