Learn about the different types of alternative water sources covered on the USGBC LEED Green Associate certification exam, including rainwater, greywater, and more.
Table of Contents
Question
Which type of water should be considered an alternative water source?
A. Rainwater
B. Dirty water
C. Blackwater
D. Potable water
Answer
A. Rainwater
Explanation
Rainwater is considered an alternative water source because it is a sustainable source of water that is not supplied from fresh surface water or groundwater. Rainwater can be harvested from roofs or other surfaces and stored for later use.
Rainwater can offset the demand for freshwater and reduce the pressure on water resources. Rainwater can be used for various purposes, such as irrigation, toilet flushing, cooling, and cleaning. LEED projects can earn credits for using alternative water sources under the Water Efficiency category.
Rainwater is considered an alternative water source in the context of the LEED Green Associate exam and green building practices. Rainwater can be captured from roofs and other surfaces, stored, and then used for non-potable applications like irrigation, toilet flushing, and cooling tower make-up water. Using rainwater helps reduce the demand on municipal potable water supplies.
The other options are not considered alternative water sources:
B. Dirty water is not a specific technical term and does not refer to an alternative water source.
C. Blackwater refers to wastewater from toilets and kitchen sinks that contains fecal matter and high levels of contaminants. Blackwater requires advanced treatment before reuse and is not itself an alternative water source.
D. Potable water refers to treated municipal drinking water, the opposite of an alternative source. The goal of using alternative water sources like rainwater is to reduce potable water consumption.
Other examples of alternative water sources include:
- Air conditioner condensate
- Foundation drain water
- Greywater from sinks, showers, and washing machines
- Stormwater runoff
- Treated wastewater
Using alternative, non-potable water sources for appropriate applications is an important water efficiency strategy covered on the LEED Green Associate exam.
USGBC LEED Green Associate certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the USGBC LEED Green Associate exam and earn USGBC LEED Green Associate certification.