If you live in the USA you ...
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
If you live in the USA you can contact your water supplier and obtain all of the information on the water quality and their performance meeting drinking water standards. There are about 100 standards that cover organic and inorganic chemicals and microbials and radionuclides, filtration and disinfection. They are required to produce a Consumer Confidence Report that explains it all.