What is the only kind of water which can be used for drinking?

There is no "only" kind of water that can be used for drinking. Many types of water can be safe to drink, but they need to meet certain standards for safety and purity. Here's a breakdown:

* Safe Drinking Water:

* Tap Water: Treated water from public water systems is generally safe to drink.

* Bottled Water: Water that has been purified and bottled.

* Well Water: Water drawn from an underground source. This needs to be tested regularly for contaminants and may require treatment before drinking.

* Spring Water: Water that originates from a natural spring. It is often bottled but can also be accessed directly from the source.

* Filtered Water: Water that has been passed through a filter to remove impurities.

* Unsafe Drinking Water:

* Untreated Surface Water: Water from rivers, lakes, and oceans is often contaminated and unsafe to drink without treatment.

* Water from Unknown Sources: Always be cautious about drinking water from sources you can't identify.

Important Note: The safety of any water source depends on factors like location, contaminants, and treatment methods. It's always best to consult local authorities and water quality reports to determine the safest water to drink.