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US Green Building Council LEED AP ND Exam - Topic 3 Question 28 Discussion

Posted by Ricki on May 12, 2026 at 07:40 PM

Which strategy contributes to earning points for the Green Infrastructure and Buildings Credit, Indoor Water Use Reduction?

Suggested Answer: B

The Green Infrastructure and Buildings Credit for Indoor Water Use Reduction rewards projects that implement water-saving technologies and fixtures, such as dual-flush toilets. Dual-flush toilets allow users to choose between a full flush or a reduced flush, which significantly reduces water consumption for toilet use. This strategy directly contributes to earning points under this credit by lowering the total indoor water usage in the project.


LEED v4 Neighborhood Development Guide: This guide outlines the requirements for achieving points in Indoor Water Use Reduction, including the use of dual-flush toilets and other water-efficient fixtures (USGBC, LEED v4 Neighborhood Development Current Version).

LEED Reference Guide for Neighborhood Development: Provides detailed information on water-saving strategies that qualify for the Indoor Water Use Reduction credit (USGBC, LEED Reference Guide for Neighborhood Development).

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24 comments · newest first
LE
Leontine 1 day ago
I think B is a solid choice. Dual-flush toilets save a lot of water.
GE
Georgene 6 days ago
I disagree, C) Native vegetation doesn't seem relevant to indoor water use.
AL
Aliza 12 days ago
D) Water submeters definitely help track usage!
FR
Frank 17 days ago
Wait, can using native vegetation really help with indoor water use?
RO
Romana 22 days ago
I think B) Dual-flush toilet is the best option here.
KA
Katie 27 days ago
A) Non-potable water for cooling towers is a solid choice!
CH
Chaya 1 month ago
Water submeters help track usage, definitely a good strategy!
LE
Leontine 1 month ago
Really? I didn’t know dual-flush toilets counted for that credit.
MA
Mariann 1 month ago
Non-potable water for cooling towers is a smart move!
MA
Maynard 2 months ago
I thought native vegetation was more about landscaping?
TA
Tashia 2 months ago
A dual-flush toilet can save a lot of water!
MY
My 2 months ago
C) Native vegetation? I don't see how that relates to indoor water use.
LA
Lashanda 2 months ago
D) Water submeters definitely help track usage!
SH
Shayne 2 months ago
Really? I didn't know non-potable water could earn points.
BO
Bo 2 months ago
I thought dual-flush toilets were the best choice here.
VA
Vallie 3 months ago
A) Non-potable water for cooling towers is a great option!
CA
Carma 3 months ago
I practiced a similar question where water submeters were mentioned, and I think they help track usage, but I'm not confident they directly earn points for this credit.
AN
Annita 3 months ago
I thought native vegetation was more about landscaping than indoor water use, so I’m leaning towards the dual-flush toilet or water submeters for this question.
TR
Trinidad 3 months ago
I remember studying about non-potable water systems, and I feel like using that for cooling towers might help with water reduction, but I can't recall if it's specifically for this credit.
MA
Mari 3 months ago
I think the dual-flush toilet is a good option for reducing indoor water use, but I'm not entirely sure if it directly contributes to the credit.
JA
Jani 3 months ago
I’m not confident, but I think native vegetation is more about landscaping than indoor water use reduction.
AL
Alysa 4 months ago
I’m leaning towards dual-flush toilets, but I also remember something about water submeters being important for tracking usage.
TA
Tatum 4 months ago
I feel like non-potable water for cooling towers was mentioned in a similar practice question, but I can't recall if it specifically counts for indoor water use.
RA
Rasheeda 5 months ago
I think I remember that dual-flush toilets help reduce indoor water use, but I'm not entirely sure if that's the best option for this credit.
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