Which prerequisite category must all projects comply with for indoor water use?

The prerequisite category that all projects must comply with for indoor water use is indeed the Water Efficiency (WE) Prerequisite. This prerequisite underlines the importance of reducing indoor water consumption to promote sustainability and contribute to the overall goals of a LEED certified project. By adhering to this requirement, projects demonstrate a commitment to efficient water use, which is critical in addressing resource conservation and environmental impacts.

In the context of the broader LEED framework, other categories such as Site Sustainability (SS) Credits, Materials and Resources (MR) Credits, and Energy and Atmosphere (EA) Credits focus on different aspects of sustainability. While all these categories contribute to a building project's overall performance and LEED certification, the WE Prerequisite specifically targets indoor water efficiency and ensures that all projects implement best practices in managing water resources indoors, thereby enhancing water conservation efforts effectively.