Water that is safe to drink is sometimes referred to as potable water.

Potable water is defined as water that is safe for human consumption. This means it is free from harmful microorganisms, chemicals, and contaminants that could pose a risk to health. The term is widely used in water quality discussions to designate water that meets the standards set by health authorities for drinking.

The other options introduce conditions that are either misleading or inaccurate. Treated water can be made potable, but not all treated water is automatically safe, as it depends on the treatment methods used and the initial quality of the water. Similarly, while bottled water is often treated and made potable, potable water is not limited to just bottled forms; it can come from various sources, including municipal supplies and well water, provided it meets the safety standards. Therefore, the primary understanding is that if water is labeled as potable, it is explicitly deemed safe for drinking.