Because there was a fright re Earthquakes in this area,[approx. 30 years ago],over a short time I gradually stored approx. 40 gallons of tap water in plastic 1 gal.;4 litre,and some glass jugs,and wine bottles.On occasion I would take a sample out of a jug,and taste it.The chlorine had long ago worked out of it.There was no difference in taste or appearance from the day it was stored.Lately I have taken a jug,distilled it ,made , CS/EIS,no problem.If water would go bad in storage,how is it that water from deep Artesian wells that are millions of years old are being tapped for good water? Prior to moving here in 1978,I had rural property,and a deep well into an underground spring gave perfect water[tested].The water out of the tap now, is taken off in pails and let sit for a day to let the chlorine work out,then distilled for CS/EIS.
Be well all, Harold Ps,I still keep that water in reserve,just in case.