Everyone should have their drinking and bathing water tested regularly.
Private wells are at the top of the danger list for drinking water quality.
Even public and city water systems can offer surprising amounts of chemical and biological contamination. The direct source of water is not the only factor that affects what is in it. Your drinking water must pass through a maze of piping, fittings, and possibly even lead solder to arrive at your faucet. Many water systems, constructed prior to 1930, used lead elbows and other fittings to carry residential drinking water supplies to customers. The possibility of having some form of bacterial or industrial contaminant in your drinking water has never been greater.