Which of the following is a source of graywater?

Which of the following is a source of graywater?
A . Toilets
B . Urinals
C . Sprinklers
D . Lavatory faucets

Answer: D

Explanation:

Graywater refers to relatively clean wastewater from domestic activities such as washing dishes, laundry, and bathing. Water from lavatory faucets falls into this category. Graywater can be treated and reused for non-potable purposes such as toilet flushing or irrigation, which can help conserve water.

Reference: LEED Green Associate Candidate Handbook, U.S. Green Building Council resources