The amount of water typically consumed by an adult is said to be about two liters per day, and nearly all of this is tap water or mineral water, generally referred to as 'drinking water.' Conducting safety inspections are the responsibility of each country according to their respective regulations. Typically, there are many target elements included in the test, such as sodium (Na), calcium (Ca), etc. which are present at the mg/L level or greater, and toxic trace elements such as lead (Pb) and cadmium (Cd), which are normally present at the μg/L level or less. This note presents how the simultaneous ICPE-9800 can provide accurate measurement of many elements, from those present at trace levels to those at high concentrations.