To be 100 percent fair, tap water in China has shown a concerning level of trace amounts of heavy metals (Not the Led Zeppelin kind, unfortunately) and is often slightly worse than in the U.S., in China its more understandable given that the nation is still a developing country containing over 16 percent of humanity and installing and cleaning new state of the art pipes and irrigating water and purifying minerals from water is extremely complex and tedious work, the Chinese government at least has greatly improved water treatment over the past few decades, continues to do so, has a very strong drive to provide for its people, and has spent billions of dollars introducing tap water to Tibet, which previously didn’t have running water until recently.

Where as the U.S. if anything probably wants to get rid of tap water because “its communist!”

the head of the relevant official, obviously