What is the definition of nonpotable water?

Nonpotable water refers to water that is not safe for human consumption, meaning it cannot be used for drinking or cooking purposes. This definition is crucial in plumbing and public health because it emphasizes the importance of using appropriate water supplies for specific applications. Nonpotable water can include sources such as graywater, water from certain industrial processes, or any water that may contain contaminants that could pose health risks if ingested.

Understanding this definition is vital for implementing proper plumbing systems that ensure safe drinking water is kept separate from nonpotable sources. Other definitions related to the quality or treatment of water, such as those for drinking purposes, bathing, or irrigation, do not encompass the risk aspect that nonpotable water presents. This clearly distinguishes the uses and safety precautions necessary for different water types in various contexts.