Overall Rating Gold
Overall Score 79.39
Liaison Yolanda Cieters
Submission Date March 5, 2021

STARS v2.2

Seattle University
IN-43: Water Balance

Status Score Responsible Party
Complete 0.50 / 0.50 Yolanda Cieters
Sustainability Manager
CEJS
"---" indicates that no data was submitted for this field

Has the institution calculated a natural water balance for the campus to assess the sustainability of its water withdrawal?:
Yes

A brief description of the methodology used to calculate the campus water balance:

We took the total campus area at 50 acres and multiplied it by the average annual rainfall (40 inches) in Seattle to get the total volume of water that enters our campus each year. We also took evapotranspiration into account, which means about 10 inches of water leaves our campus each year by evaporation, so we net an average of 30 inches of water over 50 acres per year.


A brief description of how the institution’s water withdrawal compares to the natural water balance of the campus:

When taking evapotranspiration into account, we found our net water intake is 40,730,000 gallons per year from the natural environment while our average annual water consumption is 34,550,000, resulting in a net positive annual balance of 6,180,000 gallons.


Website URL where information about the institution’s natural water balance is available:
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Additional documentation to support the submission:
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