Lefineder:

The English, said Sir John Fortescue (c. 1470), “drink no water, unless at certain times upon religious score, or by way of doing penance.”, looking at reconstructions of beer consumption from the middle ages to the pre-industrial era this was only a slight exaggeration. When estimating consumption from the amount of beer provided to soldiers, convicts, and workers or reconstructing consumption from tax revenues on beer we see that the average person consumed about a liter of beer a day, this is around four times as much as consumption in modern beer-drinking countries.

Better times, ya know