Because beer won’t keep for a few months?
>> Because beer won’t keep for a few months? <<
Mebbe some town can spare its water tank? But even so: did you ever read how Flint’s water crisis happened? It sounded like a slam-dunk: use the now-much-cleaner river water at a tiny, tiny fraction of the municipal water. They tested it, and it was absolutely safe. The problem was that the perfectly good water hit the outdated, should-have-been-replaced, slum-hole water pipes and picked up lead THERE.
The beer company probably figures the safety engineering needed to protect them from some unforeseeable problem simply isn’t worth it.