Our project is pursuing LEED v4 BD+C certification, and we are located on a campus. The landscape within our LEED project boundary is served by an irrigation loop which irrigates land beyond the boundary. The irrigation loop is metered at the campus level, and it is cost-prohibitive for us to install a new irrigation meter for the small patch of grass within our LEED project boundary receiving irrigation. Is it possible for us to achieve LEED v4 WE prerequisite Building-Level Water Metering using the campus irrigation data?
The project is requesting clarification as to how to document compliance with LEED v4 WE prerequisite Building-Level Water Metering, given that the project landscape is served by an irrigation loop which is part of a campus system.
For compliance with LEED v4 WE prerequisite Building Level Water Metering, projects whose water use for irrigation is metered at the campus system level may submit an engineering calculation that accurately reflects the water consumption of the landscaped area within the project boundary, or prorate irrigation data for the project boundary from the campus meter.
If the project chooses to prorate irrigation data from the campus meter in lieu of installing irrigation meter(s) to track landscape water consumption within the project boundary for WE prerequisite Building Level Water Metering, irrigation water systems are excluded from the list of water subsystems eligible for WE credit Water Metering.
**Made applicable to LEED v4.1 on 4/18/2023**