Shaddad al-Attili, director of the authority, told Ma’an that they currently buy water from Israel for 2.6 shekels ($0.67) per cubic meter and sell it to local municipalities at the same price.
Israel is planning to increase water prices to 3.30 shekels ($0.85), al-Attili said, adding that the authority will not increase the sales price to municipalities.
In September, demonstrators protested the rising cost of living in the West Bank and demanded the cancellation of the Paris Protocol, an economic annex to the Oslo Accords which Palestinians say mostly benefited Israel.
Under agreements signed in 1994, Israel controls more than 80 percent of West Bank water resources by occupying the areas where the water is most plentiful.
Human rights organization Amnesty International says Palestinians on average use 70 liters of water a day while Israelis and Jewish settlers consume an average 300 liters a day.
The differential is even more stark in settler communities in the Jordan Valley and northern Dead Sea, where, according to the Israeli rights group B’Tselem, residents used some 1,312 liters a day in 2008, mainly for agriculture.
This was almost 18 times more than the amount of water made available to Palestinians, the group said in a 2011 report. It said the monthly cost of water for Palestinians was three times more than that paid by settlers.