My concern is with water that can make you sick. I've been reading up on water quality and it might be clean when it leaves the water company, but maybe not when it gets to the tap you are using. Some testing showed a public toilet has cleaner water than some drinking fountains for example. Last thing I want on a trip out of town is to get sick off the water. Bottled water for drinking might be viable, I don't know about using contaminated water for washing dishes though. Toilet would be o.k. to use unknown water.
It's my understanding that there are lots of bad stuff in water, but locals build up their tolerance. What happens when you are not local?
This has all come about because we have had vacations ruined by getting sick off local water supplies.