We should have to find and sanitize water

[Codexehow]

I realize there is probably a reason you didn't put this in the game . But it would be cool.

Water collection and sanitation could be a job.  It would be a very low-tech job. Just boil some water over a fire. Later it could be industrialized and automated.

People would die of dehydration if they don't drink regularly, but they could carry bottles of water so it wouldn't be a real threat unless a pawn is trapped away from base for an extended period of time.

The game really needs this, imo.