Some contaminants may cause aesthetic problems with drinking water, such as the presence of unpleasant tastes or odors, or cosmetic problems, such as tooth discoloration. Since these contaminants do not cause health problems, there are no legally enforceable limits on their presence in drinking water.
Some impurities might cause visual or sensory issues with drinking water, like unpleasant flavors or smells, or cosmetic problems such as tooth discoloration. Since these contaminants do not affect health, there are no legally mandated restrictions on their presence in the water supply.