For the most part, yes. That is why they tended to congregate around water sources. Even early settlements and towns and cities were near waters sources even after we had portable water containers because water is heavy and large numbers of people need a large water source.

But before we changed the environment significantly, there were a lot more potable water sources. More streams, more water pooled up after rains, etc. that could be ingested because of a lack of human pollution. If humans were within a days walking distance of a water source, they could do their hunting and gathering nearby and drink up afterwards.