Every day in restaurants across Toronto, thousands of litres of clean drinking water is flushed down the drain—without ever being used for its intended purpose.
Treated by the city, potable water is safe to be consumed. It’s the same water that flows from your taps, but it’s also the water that is typically found in toilet cisterns.
For advocates of greywater recycling systems, it’s a use that doesn’t make sense, especially when there is other water available.
Also called “sullage,” greywater is wastewater that has been captured from drains and reused, typically in toilets and subsurface irrigation. Unlike the forebodingly named “blackwater, ” it doesn’t contain toxic chemicals or fecal matter and is safe for use in washrooms.
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