Would you drink this water? What if that is your only choice? WHAT IF you couldn't even get this water everyday- it was just sporadically?
Generally, the water quality is considerably worse in the Gaza strip when compared to the West Bank. About a third to half of the delivered water in the Palestinian territories is lost in the distribution network. As for the "waste water", the existing treatment plants do not have the capacity to treat all of the produced "waste water", causing severe water pollution.
The high water loss rates are due to old pipes and other dysfunctions. Because of finances, the water supply is getting worse and less routinely.