The Clean Water Act (CWA) Regulates 91 contaminates. If Tap water contains less the maximum Levels (MCL) of accepted contaminates, your tap water is Legally safe. Drugs have been reported in tap water around the world for over 10 years, including animal pharmaceuticals. None of these emerging drug contaminates are regulated in Legally safe tap water and many become more toxic when they contact chlorine, Which is used heavily in our municipal water plants. The laws today are more strict then they were 10 and 20 years ago, and you can be sure that drinking water laws are going to become more protective over the next 20 years. With hazardous waste, industrial discharge, landfills ect… polluting our water supply, combined with municipal water plants legally allowing contaminates in our drinking water.