There was something about one of the parents bathing the kids in water that smelled bad, I nearly freaked when I heard that in the program.
There are whole regions with high sulphur content in groundwater, giving it a vague odor of rotten eggs. Soap won’t lather in it either, it’s too hard. It was just something you put up with to be at the beach in NC and SC prior to the advent of municipal water systems down there, and it’s still not great water, just better than awful.
Weird parents, clueless about testing water.