The primary ruling is that these are permissible to use. However, if it is known that they are contaminated with impurity, then they may not be used until they have been washed.
The water that ensures purification is called tahur, and it is defined as pure and purifying. It is every type of water that retains its original state as it is created, whether it falls from the sky, such as rainwater, snow, and hail, or comes up from the earth, such as the water of rivers, springs, wells, and seas