Relevant Mandates and Rating Systems
|Mandates / Standards||Rating Systems|
The Guiding Principles for Sustainable Federal Buildings: New Construction and Modernization
- As per EISA 2007, thirty percent of the hot water demand should be met using the installation of solar hot water heaters when lifecycle cost-effective.
- Section III of the Guiding Principles addresses the need to "Protect and Conserve Water" in facilities indoors and outdoors as well as using alternative water sources and managing stormwater.
- Guidance requires reducing outdoor water use by 50% compared to conventional practices and the installation of water efficient landscaping.
- Water meters are required both inside and outside the facility, as are the use of water-efficient products.
The Guiding Principles for Sustainable Federal Buildings: Existing Buildings
- Install water meters.
- Use water efficient products.
- Reduce indoor potable water use by 20% compared to the specific building’s water use data in 2007.
- Install separate water meters for irrigation systems above 25,000 sf and reduce potable water for irrigation by at least fifty percent compared to conventional practices.
Executive Order 13693 (2015)
Planning for Federal Sustainability in the Next Decade
Executive Order 13693 requires Federal agencies to improve water use efficiency and management by reducing potable water intensity (gallon per square foot of building area) by 36 percent by fiscal year 2025, through 2 percent annual reductions relative to baseline of agency's water consumption from FY2007. EO13693 further requires a reduction in agency industrial, landscaping, and agricultural (ILA) water consumption by two percent annually through FY2025 relative to baseline of the agency's ILA water consumption in Fy2010. Agencies are also encouraged to identify, promote, and implement water reuse strategies consistent with state law that limits the need to consume potable water.
Energy Independence and Security Act (2007)
The Energy Independence and Security Act (EISA) requires facility managers, as defined by the act, to complete comprehensive water evaluations through retro-commissioning of 25 percent of covered facilities each year, so that each facility is completed at least once every four years. Water efficiency measures were specified, with the promotion of bundling measures into combined projects as a cost-effective strategy to reduce overall energy consumption per square foot by thirty percent by FY2015. Measuring and verifying water savings through metering is also made explicit.