What is required for the Outdoor Water Use Reduction Credit?

To achieve the Outdoor Water Use Reduction Credit under LEED V4, a project must demonstrate a reduction in outdoor water use compared to a baseline scenario. This means that projects need to implement strategies to minimize irrigation and rely on efficient landscaping practices, such as the use of native or drought-tolerant plants, smart irrigation systems, and the incorporation of rainwater harvesting.

Meeting the specific water usage reduction requirements is essential because it aligns with LEED's goal of promoting sustainable water use practices and reducing the environmental impact of developing properties. This makes option A the correct choice, as it reflects the necessity for all projects to achieve a quantified reduction in outdoor water consumption.

The other options miss the overarching requirement for all project types to pursue reductions in outdoor water use to earn the credit. Medical facilities, while having unique considerations, still must adhere to the basic credit requirements applicable to all projects. The ineligibility claims mentioned in some options do not align with the general principles set forth by LEED regarding outdoor water use reduction.