There's quite the problem in Mothership Zeta (Not so much a bug as an oversight) in that I die of dehydration before managing to finish the DLC.
The only way I could prevent myself from dying was through cheats (Spawning some water bottles), and the only legit water source was a bottle of dirty water on a wastelander corpse.
If there was more water or some alien water, this wouldn't be an issue, but I'd rather not have to cheat/turn off hardcore mode/bring a butt-load of water with me.