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NC-v4 WEc4:Water metering

Reclaimed water irrigation service metering - can this effectively fulfill quota of (2) minimum water subsystems?

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Joanna Switzer
Sustainability Project Manager
Atkins
LEEDuser Basic Member
59 thumbs up

Step 2 of the Step-by-Step BD+C Reference guidance notes...."if the team is using reclaimed water for irrigation, 100% of this water must be submetered. The meter for reclaimed water may also be the same meter that is counted for irrigation, fxtures, or process
water. If reclaimed water is used in multiple applications in the project (e.g., for irrigation, flush fixtures, or process water), then all reclaimed water use must be metered; the team may report data from multiple submeters, as applicable."

Based on this, I am interpreting that a project that uses reclaimed water exclusively for landscape irrigation purposes can qualify for this credit as long as the reclaim/irrigation water consumption is adequately metered so that it encompasses >80% of the landscaped area within the LEED boundary.

In this case, no additional water subsystems would need to be metered to fulfill credit requirements?

Has anyone been successful / had this credit awarded to date using this approach?


 

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Trista Brown
Project Director
WSP USA
LEEDuser Basic Member
381 thumbs up

Thu, 05/17/2018 - 01:48

Hi Leanne, I believe you're interpreting this correctly. I haven't heard of anyone using this approach before, so please let us know how it goes!

Wed, 12/19/2018 - 15:59

Joanna - any luck with only using the reclaim meter in this instance?

Thu, 07/20/2023 - 18:27

I sent this question to GBCI and here is the response I receieved:  Yes, a rainwater harvesting system used for irrigation with a makeup water submeter would qualify as two subsystems (reclaimed water and irrigation).   The LEED v4 BD+C Reference Guide states, “Meter reclaimed water, regardless of rate. A reclaimed water system with a makeup water connection must also be metered so that the true reclaimed water component can be determined.”   Additionally, “The meter for reclaimed water may also be the same meter that is counted for irrigation, fixtures, or process water. If reclaimed water is used in multiple applications in the project (e.g., for irrigation, flush fixtures, or process water), then all reclaimed water use must be metered; the team may report data from multiple submeters, as applicable.”

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