Iowa State University
OP-21: Water Use

• Documentation Fields
• Credit Info

Level of ”Physical Risk Quantity” for the institution’s main campus as indicated by the World Resources Institute Aqueduct Water Risk Atlas:
Total water withdrawal (potable and non-potable combined):

	Performance Year	Baseline Year
Total water withdrawal	540,653,761 Gallons	639,227,463 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	373,873,058 Gallons	355,732,763 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):

	Start Date	End Date
Performance Period	July 1, 2021	June 30, 2022
Baseline Period	July 1, 2011	June 30, 2012

A brief description of when and why the water use baseline was adopted:
Figures needed to determine "Weighted Campus Users":

	Performance Year	Baseline Year
Number of students resident on-site	8,888	9,886
Number of employees resident on-site	1	1
Number of other individuals resident on-site	1	1
Total full-time equivalent student enrollment	29,458	29,991
Full-time equivalent of employees	6,131	5,704
Full-time equivalent of students enrolled exclusively in distance education	1,108	1,469
Weighted campus users	28,084	28,142.25

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	13,312.67 Gallons	12,640.52 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
Gross floor area of building space:

	Performance Year	Baseline Year
Gross floor area	13,487,445 Gross square feet	12,585,043 Gross square feet

Potable water use per unit of floor area:

	Performance Year	Baseline Year
Potable water use per unit of floor area	27.72 Gallons per square foot	28.27 Gallons per square foot

Percentage reduction in potable water use per unit of floor area from baseline:
Area of vegetated grounds:

	Performance Year	Baseline Year
Vegetated grounds	200 Acres	200 Acres

Total water withdrawal per unit of vegetated grounds:

	Performance Year	Baseline Year
Total water withdrawal per unit of vegetated grounds	2,703,268.81 Gallons per acre	3,196,137.32 Gallons per acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
A brief description of the institution's water-related behavior change initiatives:
A brief description of the institution's water recovery and reuse initiatives:
A brief description of the institution's initiatives to replace plumbing fixtures, fittings, appliances, equipment, and systems with water-efficient alternatives:
Website URL where information about the institution’s water conservation and efficiency efforts is available:
Additional documentation to support the submission:
Data source(s) and notes about the submission: