rain water
Canada.
Antarctica is considered the cleanest continent due to its limited human presence and strict environmental regulations in place for research activities.
Michigan has the best water system in America.
Hydrogen. The combustion product is water.
The drinking water in Antarctica is either melted blue ice -- i.e., no other minerals except oxygen and hydrogen, or desalinated sea water. It is the most delicious water ever tasted, some would say. 'Cleanest' means nothing else in the water, and under this definition, any desalinated sea water or melted blue ice would qualify as cleanest.
There are no rivers or lakes on Antarctica and therefore no waterfalls, the extreme cold freezes water. Antarctica is the highest, driest, windiest, coldest, cleanest, most isolated and most peaceful continent on earth.
Switzerland has the best drinking water. Switzerland's percentage is 95.5.
Scotland has some of the cleanest water in the world! The tap water is very safe to drink.
Cleanest.
Pakistan is the cleanest country in the world
a dog actually has the cleanest mouth