4.6: Alternate Water Sources

(28 maximum points possible)

4.6.1 Alternate Water Sources for Indoor Uses (12 points)

GREEN GLOBES #4.6.1.1 - ANSI #9.6.1.1 What percentage of indoor water demands are met with non-potable water?

• >75% (10 points) 
• >50 and ≤75% (8 points)
• ≥25% and ≤50% (6 points) 
• ≥15% and ≤24% (3 points) 
• <15% (0 points) 
• N/A

Assessment Guidance

Not applicable where the authority having jurisdiction prohibits the use of alternate water sources for indoor applications.

References 

• EPA’s Guidelines for Water Reuse

Recommended Documents

• Designer’s drawings, specifications, and performance documentation including estimated yield and calculations to demonstrate the percentage of water from nonpotable sources and alternate water sources 
• Description of alternate water sources and implementation for non-potable water applications

GREEN GLOBES #4.6.1.2 - ANSI #9.6.1.2 Is one or more of the following systems at least 80% pre-plumbed (pipes and valves) during construction?

• Graywater 
• Reclaimed water 
• Recycled water 
• Stormwater 
• Rainwater

Assessment Guidance

Pre-plumbed systems are marked or otherwise identified as such.

Recommended Documents 

• Designer’s drawings, specifications, and performance documentation including estimated yield and calculations to demonstrate the percentage of water from nonpotable sources and alternate water sources 
• Description of alternate water sources and implementation for non-potable water applications 
• Construction Documents

4.6.2 Alternate Water Sources for Outdoor Uses (15 points)

GREEN GLOBES #4.6.2.1 - ANSI #9.6.2.1 Are alternate water sources used to replace potable water for one of the following outdoor purposes?

• Cooling Towers (15 points) 
• Irrigation (15 points)
• Water features, Wash Down/ Surface Washing; AND/OR Dust Control (0 points) 
• N/A

Assessment Guidance

Irrigation is not applicable where the vegetative landscape is less than 25% of the site. Not applicable where there is no irrigation or other outdoor demand.

Note: Criterion only visible if 4.6.2.1 is answered with "Water features, Wash Down/ Surface Washing; AND/OR Dust Control"

GREEN GLOBES #4.6.2.1.1 - ANSI #9.6.2.1.3 Are alternate water source(s) used for Water features?

• Yes (5 points)
• No (0 points)
• N/A

Assessment Guidance

Not applicable where there is no irrigation or other outdoor demand.

GREEN GLOBES #4.6.2.1.2 - ANSI #9.6.2.1.4 Are alternate water source(s) used for Wash Down/Surface Washing?

• Yes (5 points)
• No (0 points)
• N/A

Assessment Guidance

Not applicable where there is no irrigation or other outdoor demand.

GREEN GLOBES #4.6.2.1.3 - ANSI #9.6.2.1.5 Are alternate water source(s) used for Dust Control?

• Yes (5 points)
• No (0 points)
• N/A

Assessment Guidance

Not applicable where there is no irrigation or other outdoor demand.

4.6.3 Graywater Treatment (1 point)

GREEN GLOBES #4.6.3.1 - ANSI #9.6.3.1 Are graywater treatment systems NSF 350 listed where present?

• Yes (1 point)
• No (0 points)
• N/A

Assessment Guidance

Not applicable where there are no Graywater treatment systems.

Recommended Documents

• Designer’s drawings, specifications, and performance documentation including estimated yield and calculations to demonstrate the percentage of water from nonpotable sources and alternate water sources 
• Description of alternate water sources and implementation for non-potable water applications 
• Manufacturer’s specifications, cut sheets and performance documentation

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