My kitchen sink has started doing something really weird. When you turn it on it is effervecent for about 2 seconds and then it is all right. Then if you leave it off for about 10 minutes it does it again when you turn it on. Should we not be drinking this water?
Thanks, Nancy

That is air getting mixed into the water as it passes through the aerator, its fine. This sinlge issue does not indicate the water is bad to drink, it may be but not because of the effervescence.