For what purpose may non-potable water be used?

Non-potable water is water that is not safe for human consumption but can be used for various purposes that do not require drinking quality. Using non-potable water for flushing water closets and urinals is a common practice because it helps conserve potable water, which is often in limited supply and should be reserved for drinking and cooking.

Flushing toilets typically requires large amounts of water, and utilizing non-potable sources, such as treated wastewater or gray water, can significantly reduce the demand on municipal water systems. This practice also promotes sustainability and resource management.

While non-potable water can also be utilized for other applications like irrigation and cooling machines, the use of non-potable water specifically for sanitary fixtures is often highlighted due to its effectiveness in preserving potable water resources.