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

Actual exam question for US Green Building Council's LEED AP ND exam

Question #: 28
Topic #: 3

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

ANon-potable water for cooling towers

BDual-flush toilet

CNative vegetation

DWater submeters

Show Suggested Answer

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).

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

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Maynard

3 days ago

I thought native vegetation was more about landscaping?

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Tashia

8 days ago

A dual-flush toilet can save a lot of water!

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My

13 days ago

C) Native vegetation? I don't see how that relates to indoor water use.

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Lashanda

18 days ago

D) Water submeters definitely help track usage!

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Shayne

23 days ago

Really? I didn't know non-potable water could earn points.

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Bo

28 days ago

I thought dual-flush toilets were the best choice here.

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Vallie

1 month ago

A) Non-potable water for cooling towers is a great option!

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Carma

1 month 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.

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Annita

1 month 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.

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Trinidad

2 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.

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Mari

2 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.

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Jani

2 months ago

I’m not confident, but I think native vegetation is more about landscaping than indoor water use reduction.

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Alysa

2 months ago

I’m leaning towards dual-flush toilets, but I also remember something about water submeters being important for tracking usage.

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Tatum

2 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.

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Rasheeda

4 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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