LEED Green Associate (LEED GA) — Question 3

A developer has asked the building designer to incorporate a landscape irrigation system using the building's graywater in order to earn LEED points. Which is the most appropriate source of graywater for this use?

Answer options

• A. Urinal
• B. Toilet
• C. Janitor sink
• D. Bathroom sink

Correct answer: D

Explanation

The correct answer is D, as graywater from a bathroom sink is cleaner and more suitable for irrigation than water from a urinal, toilet, or janitor sink, which may contain contaminants. Using graywater from these other sources can pose health risks and is typically not allowed for irrigation purposes.