nostr:npub1a2s4fd64mxwlgft6hws84plmkwchzv8fxd6xasdxsysywg3c08xq44hk7y Depending where you live. Local people know. For example, Long Island, NY should bottle and sell their tap water, by both detailed testing and human experience testing it. World class. Where we live now, Central TX, local city water tests excellently but taste is awful, worse if heated ex for tea. That expression matches my wife face when she first made tea here with tap water.