Reducing potable water use is not only about conserving water but also about limiting the energy required to treat, transport, and pump that water. According to the LEED v4 BD+C Study Guide (WE Credit: Indoor Water Use Reduction and Outdoor Water Use Reduction), energy is inherently tied to water use because:
Treating and distributing potable water is energy-intensive.
Heating water (for showers, sinks, etc.) increases building energy use.
Reducing water use therefore reduces both water and energy consumption, supporting the integrative goals of sustainability.
From LEED's broader goals:
"Reduce the energy and resources used in treating potable water by encouraging alternative water sources and efficiency measures." Therefore, Option A most directly aligns with LEED's intent to reduce environmental impact through energy and water savings.
Options B, C, and D are not direct primary drivers in LEED's reasoning for potable water reduction.
Here is the next question formatted and categorized according to LEED principles under the Energy and Atmosphere topic: