 The county has 7 permanent river but there But their watering varies between 10 million cubic meters to 1 billion cubic meters.The largest river of the county is Dareroud; The valley of the river originates from the slopes of Mount Sabalan and joins Aras river on the northern border of I.R.Iran passing through the counties of Ardabil, Meshkin-Shahr, Germi and Bilesuvar and joining several rivers along the route.