to eliminate potable water consumption for site irrigation to
minimize the demand on limited water supplies.
Option 1 - Use only captured rainwater, recycled wastewater,
recycled gray water, or municipally provided gray water for
Option 2 - Do not use irrigation.
- Captured rainwater systems
- Recycled wastewater
- Municipally provided recycled gray water
- Indigenous plants
- Research the potential health issues associated with using
graywater for irrigation. Graywater may contain bacteria and other
potential pathogens. Some plants are not suited well for graywater
- The USGBC does not consider hard-piped underground irrigation
lines to be acceptable as a temporary irrigation system; however,
hose connections and above ground drip systems can be used for up
to one year to get plants established.
- When designing a site, consider the addition of a detention
pond or the use of an existing pond to provide a source of
untreated, non-potable water for landscape irrigation. This credit
may be complimentary to a detention pond used for storm water
- Spray irrigation is not permited for graywater irrigation due
to possible health issues.
- 30% of all California LEED Certified projects achieved this
credit for LEED v2.1.
Additional EDR Resources
Case Studies: Public Agency Demonstrates Resource Efficiency
Through Innovative Design
Case Studies: An Integrated Campus Benefits From Its Desert
Case Studies: Multi-Agency Library Benefits from Daylighting
Case Studies: Teaming
Up with Nature
Thinking Outside the Box
Design Briefs: Design
For Your Climate