下列哪项属于灰水？

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试卷: LEED v4 GA模拟题A卷中文[查看]
下列哪项属于灰水？Which of the following would be considered graywater?
A: 空调冷凝水 Air conditioning condensate
B: 城市循环使用的水（再生水） Recycled water from the city
C: 未处理的洗衣排水 Untreated laundry water
D: 洗碗排水 Water from a dishwasher

参考答案: C

本题解释:
正确答案：C
系统解析: A也是一种水质较好的非饮用水，可用于灌溉和冲厕，但不属于灰水。

C:Graywater is defined by the Uniform Plumbing Code (UPS) as untreated house-hold wastewater which has not come into contact with toilet waste or kitchen sinks.

Graywater includes used water from bathtubs, showers, bathroom wash basins, and water from clothes-washer and laundry tubs. It does not include water from kitchen sinks or dishwashers.

A:This is a source of non-potable water for uses such as irrigation.
B:This is just recycled water.
D:This is blackwater.