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US Green Building Council Exam LEED-Green-Associate Topic 6 Question 42 Discussion

Actual exam question for US Green Building Council's LEED-Green-Associate exam
Question #: 42
Topic #: 6
[All LEED-Green-Associate Questions]

Waste water from kitchen sinks is considered blackwater unless

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Suggested Answer: B

Blackwater is wastewater that contains fecal matter and pathogens, such as from toilets.Greywater is wastewater that is less contaminated, such as from showers, sinks, and washing machines1. However, the classification of kitchen sink wastewater may vary depending on local codes and regulations.Some states and authorities consider kitchen sink wastewater as blackwater because it may contain food waste and germs123.Others consider it as greywater if it meets certain quality standards and is used for beneficial purposes, such as irrigation or toilet flushing45. A CIR (Credit Interpretation Request) is a process to seek clarification on a specific credit or prerequisite in a LEED rating system, but it does not change the definition of blackwater or greywater.


Greywater Reuse | WaterSense | US EPA4

Greywater - California Department of Water Resources5

What Is Greywater? What Is Blackwater?| HomeServe USA1

Grey Water / Reclaimed Water | University of Maryland Extension2

What is meant by the terms Gray water and black water3

Credit Interpretation Requests (CIRs) | U.S. Green Building Council

by Xochitl at May 05, 2025, 07:45 AM

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Noelia
2 months ago
In that case, I think the answer would be D) a CIR is submitted and approved.
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Giuseppe
2 months ago
But what if the local codes don't specifically address it?
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Sherly
2 months ago
I disagree, I believe the answer is B) local codes state otherwise.
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Tammara
2 months ago
Wait, we're supposed to be dealing with 'blackwater' here? I thought this was a test on plumbing, not a horror movie!
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Giuseppe
2 months ago
I think the answer is A) it is for use in toilets.
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Deeann
2 months ago
A makes the most sense to me. If it's being used for toilets, it shouldn't be considered blackwater.
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Izetta
1 months ago
B) local codes state otherwise
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Hayley
1 months ago
I agree, using it for toilets seems like a good way to classify it differently.
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Shad
1 months ago
A) it is for use in toilets
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Truman
2 months ago
I think local codes might also play a role in determining if it's considered blackwater.
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Truman
2 months ago
I agree, using it for toilets would make it greywater.
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Viki
2 months ago
I think the answer is D) a CIR is submitted and approved, as that would ensure proper treatment of the waste water.
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Fletcher
3 months ago
D is obviously the right choice. You need to get that CIR approved before you can do anything with that wastewater!
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Xuan
2 months ago
Using kitchen sink wastewater for drip irrigation is not always allowed, so it's best to check with authorities first.
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Kanisha
2 months ago
It's important to follow local codes when it comes to handling blackwater.
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Julieta
2 months ago
I agree, you definitely need that CIR approval before using kitchen sink wastewater.
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Diane
3 months ago
But what if the local codes don't specifically address it?
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Darrin
3 months ago
I think B is the correct answer. Local codes can override the general definition of blackwater.
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Jeannetta
2 months ago
It's always important to be aware of and follow local regulations when it comes to waste water management.
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Bobbie
2 months ago
Yes, local codes can play a big role in determining how waste water is treated and classified.
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Stefania
2 months ago
I think B makes sense, it's important to follow local regulations when it comes to waste water.
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Tiera
2 months ago
I agree, local codes can definitely impact how waste water is classified.
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Lindsey
3 months ago
I disagree, I believe the answer is B) local codes state otherwise.
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Diane
4 months ago
I think the answer is A) it is for use in toilets.
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