What is the definition of potable water?

Potable water is defined as water that is free from impurities harmful to health, making it safe for human consumption. This definition encompasses various factors such as the absence of harmful microorganisms, toxic substances, and other pollutants that can affect human health. To be classified as potable, water must meet specific quality standards set by health authorities, ensuring that it does not pose any health risks when consumed.

The other options do not accurately define potable water. Treating water with chemicals may be part of the process to make it safe, but it does not inherently make the water potable; it depends on the resulting quality. While water can contain minerals and still be considered healthy, the mere presence of minerals does not guarantee that the water is safe to drink. Additionally, limiting the source of potable water strictly to rivers is overly restrictive, as potable water can come from various sources including wells, reservoirs, and municipal supply systems, provided it meets safety standards. Thus, the comprehensive understanding of what constitutes potable water directly aligns with the definition that recognizes the absence of harmful impurities.