What is the name for the water that is disposed of from a washing machine draining to the outdoors?

The term for water that is disposed of from a washing machine draining to the outdoors is known as gray water. Gray water is defined as wastewater from domestic activities such as laundry, dishwashing, and bathing, excluding toilet waste. This type of water typically contains only low levels of contaminants and is considered less harmful compared to black water, which comes from toilets and contains feces and urine.

Understanding the classification of water waste is important, especially in the context of water management and environmental considerations. Gray water can often be reused for irrigation and other non-potable applications, making it significant for sustainability practices. The other terms refer to different types of wastewater or water sources: black water implies high levels of pathogens and waste, white water is not a standard term in this context, and blue water usually refers to surface and groundwater used for human purposes. Therefore, gray water is the correct and appropriate designation for water from a washing machine.