Never, Never, Never wear your jewelry into chlorinated pools, hot tubs, etc. or clean with products containing bleach while wearing it. Chlorine content is too high and will cause pitting making the gold brittle over a period of time. I had a friend who wore her ring into a hot tub only to have the piece literally fall apart before her very eyes. Fortunately it wasn't an expensive piece, and wasn't good quality to start with, but still... We never worried about common tap water, it's what we usually cleaned jewelry in, along with an ammonia based jewelry cleaning product. I read one article many years ago about it probably being best not to expose jewelry to tap water, this may have been the jewelers opinion, can't recall, but IMHO I never worried about it, and the umpteen other jewelers I worked with didn't either. I would be the type to forget a ring in a public restroom and walk out without it.