Water use reduction, 30% reduction | U.S. Green Building Council
Please upgrade your browser. This site requires a newer version to work correctly. Read more
Our "watch" feature allows you to stay current on all aspects of this specific credit. In your account, you can control what you get updated on and how you receive your notifications. Hide

LEED ID+C: Retail | v1 - LEED 1.0 pilot

Water use reduction, 30% reduction

WEc1.2 | Possible 1 point


Maximize water efficiency within tenant spaces to reduce the burden on municipal water supply and wastewater systems.


For projects with water use fixtures in the scope

Employ strategies that in aggregate use 30% less water than the water use baseline calculated for the building (not including outdoor irrigation for landscaping) after meeting the Energy Policy Act of 1992 fixture performance requirements. Calculations are based on estimated occupant usage and shall include only the following fixtures and fittings (as applicable to the building): water closets, urinals, lavatory faucets, showers, kitchen sinks.


Employ strategies in aggregate use 30% less water use baseline calculated for commercial equipment performance requirements as listed in the Table below. Calculations are based on estimated occupant usage and shall include only the following fixtures (as applicable to the building): clothes washers, dishwashers,
ice machines, food steams, pre-rinse spray values, and combination ovens.

For equipment not addressed by EPACT 92 or the table below, additional equipment performance baseline requirements may be proposed, provided that documentation supporting the proposed benchmark or industry standard is provided.

Commercial equipment performance requirements table

For projects with no water use in the scope

The credit can be achieved if the base building fixtures used by the occupants of the project comply.

FTE: Maximum full-time shift equivalent numbers for both employees and customers can be determined in the following three ways. In all three a 50/50 ration of male to female should be used:

    1. Actual or Historical data
    2. Projections
    3. If there is no actual data or projections, the following chart can be used:

Note for Calculation: Large Format Retailers are defined as greater than 50,000 square feet.

Resources: 2001 Uniform Building Code, 2004-2005 Database for Energy Efficiency Resources (DEER) Update Study, Field Investigation work performed by LEED Retail Core Committee Members, ASHRAE 90.1-2004, LEED-CS Version 2.0 Reference Guide

Join LEEDuser

Ask questions, share tips, and get notified of new forum posts by joining LEEDuser, a tool developed by BuildingGreen and supported by USGBC!

  • Share on Twitter
  • Share on Facebook
  • Share on LinkedIn
  • Print to PDF
Sample forms
View sample forms