Required Site and Water Guidelines
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S.8 Building Water Efficiency
Intent
Minimize municipal potable water or harvested groundwater (well water) use in buildings to conserve water resources and minimize water and wastewater treatment infrastructure impacts and cost.
Required Performance Criteria
A. Reduce municipal potable water or harvested groundwater use in building by 30% compared to code (1992 Energy Policy Act requirements) for any fixture types referenced by those requirements. The criteria may be met by any combination of: selection of low or no flow fixtures, use of alternatively sourced water, or other strategies.
Recommended Performance Criteria
B. Reduce municipal potable water or harvested groundwater use in building by 50% compared to code (1992 Energy Policy Act requirements) for any fixture types referenced by those requirements. The criteria may be met by any combination of: selection of low or no flow fixtures, use of alternatively sourced water, or other strategies.
Note: Portions of this guideline are adapted from LEED Version 2.0.
Compliance Tools and Resources
- Use Worksheet S-2 Building Water Calculator to calculate building water use for base and design. This also shows EPA required flow and flush fixture rates, and example fixture performance values.
Related MSBG Documents
- Form P-3 Site and Water Documentation
- Worksheet S-2 Building Water Calculator
- Appendix S-1 Suggested Implementation for All Site and Water Guidelines