Indoor water use reduction | U.S. Green Building Council
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LEED BD+C: New Construction | v4 - LEED v4

Indoor water use reduction

Possible 6 points

Submittal Tips (click to expand)
Keep these important GBCI reviewer tips in mind when preparing your submittal documentation and avoid some of the common issues reviewers see during the LEED review process.

WE Credit: Indoor Water Use Reduction

  • Remember that projects following the Prescriptive Achievement path in the prerequisite are not eligible for the credit.
  • The credit calculations must include fixtures and fittings necessary to meet the needs of the occupants. Some of these fittings and fixtures may be outside the tenant space (for Commercial Interiors) or project boundary (for New Construction).
  • Core and Shell projects must include in the credit documentation all plumbing fixtures necessary to meet the occupants’ needs, whether they will be installed as part of the project’s scope of work or not. For example, include at a minimum all necessary restroom fixtures (toilets, urinals, and lavatories) to meet the project occupants’ needs, and showers when seeking LT Credit Bicycle Facilities. Assume that the as-yet-uninstalled (future) fixtures have the baseline water consumption rates. A Core and Shell project may earn credit for the efficiency of not-yet-installed future plumbing fixtures by submitting a legally binding tenant sales or lease agreement. The agreement, signed by both owner and tenant, must state the performance requirements for the future fixtures, including the maximum water flush or flow rates and the WaterSense label (or a local equivalent for projects outside the U.S.) for all newly installed fixtures eligible for labeling. The project cannot earn credit this way unless the tenant sales or lease agreement is fully executed.
  • The related prerequisite must be earned in order for the credit to be earned.
  • If applying alternative water in the credit, provide alternative water system design drawings, a narrative describing the alternative source, and calculations confirming the alternative water quantity. Include climate data and storage size/use calculations.
  • If the non-potable water is used for multiple applications - for example, flush fixtures and landscape irrigation - demonstrate that a sufficient quantity is available to meet the demands of all uses.
  • Retail, Hospitality, Healthcare, and Schools projects can earn additional credit for meeting the appliance and process water requirements of any one table. Schools, Retail, and Healthcare projects can earn a second point for meeting the requirements of two tables.
Case Study: Using Onsite Reclaimed Waste Water to Reduce Potable Demand

International Water Labeling Programs Instructions

International Water Labeling Programs

Water Use Reduction Case Study: Morris Arboretum