The campground host should have known. We only drink bottled water but that does not work for showers.
We stayed at a provincial park this year where therewas a boil water advisory. The government inspectors are very strict and in this case the man at the park in charge of the purification system said the park water was safe. All the staff living there used it. Apparently this insp. was insecure about his testing and was closing off water in parks unnecessarily. We used it...no problems. I am in no way saying ignore posts, only commenting on this one area.