This is how moronic this whole conversation is. People drinking from the Nile for as long as people have been living beside it, just like the the Earth is round, is an unequivocal fact. You can go there today and watch people still doing it every day. The only reason some of you still bewilderingly try and argue against it is for no other reason than you want there to be an abundance of water on the Giza plateau to support your various pet theories. So in your fucked up way of thinking-your idea is only possible if the pyramid builders who worked on the Giza plateau could not drink from the Nile therefore they must have gotten it from somewhere actually on the Giza plateau which the fact they lived at all, and "could not drink from the Nile", then this is proof of this other water source you believe must be located on the Giza plateau to power your stone moving schemes. Senseless and unfortunately the common logic trope of the fringe.
Some of you think there was nothing else in Egypt during the pyramid age and all the people lived and worked at the plateau, which it pains me to even have to say it, but of course nothing could be farther from the truth. The city of Memphis, for example, had a population of roughly 20,000 people during the OK and had been a major Egyptian city since the 1st Dynasty. They did not get their water from the Giza plateau and of course relied on the Nile as did the rest of the AE population:
Stop with this nonsense about not getting drinking water form the Nile and focus on proving your case in a positive way which ironically whether the AE drank from the Nile is irrelevant.