Lake Urmia, previously known as Lake Rezaiyeh, is located in the northwest of Azerbaijan District. According to the latest country subdivisions, Lake Urmia lies between East Azerbaijan and West Azerbaijan Provinces.
After Anzali Lagoon, The National Park of Lake Urmia is one of the most interesting natural habitats in Iran. This ecosystem has been registered internationally by UNESCO as a protected area. Iranian Department of Environment has identified most parts of this lake as national park.
Lake Urmia is the biggest inland lake in Iran and the second salt lake in the world. It is the largest water of Western Asia which is located in the northwest of Iranian Plateau.
The lake water is too salty, and it is mostly fed by Zarrinehrud, Siminehrud, Aji Chay, Gadar, Shahar Chay, Nazlou, and Zola rivers.