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Greywater, also spelled gray water, is considered wastewater by most people. However, it’s beginning to be treated and used as fresh water around the world in places dealing with growing populations but shrinking amounts of fresh water. Greywater is the used water from showers, baths, hand washing, laundry, and dishes. It does not include sewage water, like water from toilets, which is called blackwater.
Greywater is non potable, which means it is unsafe to drink. It can contain many harmful things, like chemicals from soap, shampoo and dish liquids, to food particles, bacteria, and whatever dirt or germs you wash from your hands and body. In most households, the water that fills our toilets is unnecessarily potable (drinkable) water, and many communities are considering recycling greywater to flush toilets. But how safe is soapy water on plants?
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