What is the term for recycled wastewater that has never come in contact with human waste?

Grey Water

Explanation:

Gray water is any wastewater from domestic processes that corresponds to 50 to 80% of residential sewage. Water used in crockery, baths, sinks, laundry can be used for many things, especially land irrigation.

In other words, gray water is the term used to refer to recycled wastewater that has never come into contact with human waste. The water that came into contact with human waste is called black water.

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