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Explore this LEED credit
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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Prerequisites
None.Credits
Note: Rainwater and graywater capture systems are subject to local codes and may require special permits. Note that the water quality should meet local standards, and consult manufacturers’ recommendations to determine the compatibility of plumbing fixtures with graywater. Many states and regulatory agencies require that water going into a toilet or sink meet potable water standards; builders should comply with local codes.1.1 Rainwater harvesting system (maximum 4 points, as specified in Table 1 below). Design and install a rainwater harvesting and storage system (including surface runoff and/or roof runoff) for landscape irrigation use or indoor water use. The storage system must be sized to hold all the water from a 1-inch rainfall event (equivalent to 0.62 gallons per square foot of roof area used for capture), taking into consideration the size of the harvest system (i.e., 50% or 75% of total roof area, depending on the measure chosen from Table 1 below).AND/OR
1.2 Graywater reuse system (1 point). Design and install a graywater reuse system for landscape irrigation use (i.e., not a septic system) or indoor water use. The system must include a tank or dosing basin that can be used as part of the irrigation system. Graywater must be collected from at least one of the following:- clothes washer;
- showers;
- some combination of faucets and other sources estimated to exceed 5,000 gallons per year.
OR
1.3 Use of municipal recycled water system (3 points). Design the plumbing such that irrigation system water demand is supplied by municipal recycled water. This is applicable only in communities with a municipal recycled water program. Note: A home using a municipal recycled water system cannot receive points under WE 1.2 (Graywater Reuse System) or WE 1.1 (Rainwater Harvesting System) for outdoor applications.Table 1. Rainwater Harvesting
System size |
Application |
Points |
|---|---|---|
≥ 50% of roof area |
Indoor only |
2 |
≥ 50% of roof area |
Outdoor only |
3 |
≥ 75% of roof area |
Both indoor and outdoor |
4 |
What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
See all forum discussions about this credit »Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Prerequisites
None.Credits
Note: Rainwater and graywater capture systems are subject to local codes and may require special permits. Note that the water quality should meet local standards, and consult manufacturers’ recommendations to determine the compatibility of plumbing fixtures with graywater. Many states and regulatory agencies require that water going into a toilet or sink meet potable water standards; builders should comply with local codes.1.1 Rainwater harvesting system (maximum 4 points, as specified in Table 1 below). Design and install a rainwater harvesting and storage system (including surface runoff and/or roof runoff) for landscape irrigation use or indoor water use. The storage system must be sized to hold all the water from a 1-inch rainfall event (equivalent to 0.62 gallons per square foot of roof area used for capture), taking into consideration the size of the harvest system (i.e., 50% or 75% of total roof area, depending on the measure chosen from Table 1 below).AND/OR
1.2 Graywater reuse system (1 point). Design and install a graywater reuse system for landscape irrigation use (i.e., not a septic system) or indoor water use. The system must include a tank or dosing basin that can be used as part of the irrigation system. Graywater must be collected from at least one of the following:- clothes washer;
- showers;
- some combination of faucets and other sources estimated to exceed 5,000 gallons per year.
OR
1.3 Use of municipal recycled water system (3 points). Design the plumbing such that irrigation system water demand is supplied by municipal recycled water. This is applicable only in communities with a municipal recycled water program. Note: A home using a municipal recycled water system cannot receive points under WE 1.2 (Graywater Reuse System) or WE 1.1 (Rainwater Harvesting System) for outdoor applications.Table 1. Rainwater Harvesting
System size |
Application |
Points |
|---|---|---|
≥ 50% of roof area |
Indoor only |
2 |
≥ 50% of roof area |
Outdoor only |
3 |
≥ 75% of roof area |
Both indoor and outdoor |
4 |
