Which of the following is an acceptable source of potable water?

Boiler water

.

Private well water

.

Mop water

Untreated water

An acceptable source of potable water is private well water.

Explanation:

A water well is usually a dug or drilled hole in the ground to be able to use groundwater. In addition, there are wells that aim to collect rainwater (rain well). They primarily serve to provide drinking water.

If the groundwater is just below the earth's surface, which is usually the case in humid environments, the groundwater level is easily reached by fairly simple digging. The excavated pit is usually also enclosed by bricks, so that the excavated hole can remain narrow over the entire length of the pit and also does not collapse if the soil itself becomes more humid and therefore less solid.