If your project team is able to locate in a building that has highly efficient core plumbing fixtures, and the tenant is using these core fixtures in its scope of work, focusing on this credit is highly recommended, as the credit could be achieved with minimal or no adjustments.
Depending on the state and municipality, the use of graywater, as well as the use of waterless fixtures, may be more or less regulated. Check local codes for what is allowed in your area.
There are two ways to comply with this path—choose one of the following:
Find a building that treats 100% of its wastewater onsite to tertiary standards (meaning that water is treated enough to be discharged back into the environment).
Reduce the use of potable water for sewage conveyance (toilet and urinal flushing) by 50%.
Refer to LEED-NC WEc2for detailed requirements and documentation guidance. Note, however, that while LEED-NC requires 50% of wastewater be treated onsite, this path for LEED-CI requires 100% of water be treated onsite.
You can meet the requirements of this path (along with Path 7) by simply having no irrigation. Alternatively, you can irrigate with non-potable water such as graywater, rainwater, or treated wastewater, but you must still reduce total water used for irrigation by 50%.
