 The King Talal Dam was built across the lower Zarqa in 1970, and created a reservoir with a capacity of 55 million cubic meters, and increased in 1987 to 86 million cubic meters. When built, it was expected that the reservoir would supply water for municipal use in the Amman region. However, the current levels of pollution in the lake make the water unfit for human consumption, and it is used for irrigation only.
