Tell them to try boiling it then refrigerating it.

I was in a campground with my son, the water smelled like rotten eggs. We boiled some for coffee and it killed the sulfur smell. Did it again and pored the boiled water into a Nalgene bottle ( after it cooled a bit) and put it in the cooler, it tasted fine and had no smell at all.


No idea why it worked to get rid of the egg smell or if it will work in all places, but it’s worth a try for them.