Overall Rating Gold - expired
Overall Score 76.81
Liaison Aaron Durnbaugh
Submission Date March 6, 2020

STARS v2.2

Loyola University Chicago
OP-21: Water Use

Status Score Responsible Party
Complete 2.65 / 5.00 Aaron Durnbaugh
Director of Sustainability
Office of Sustainability
"---" indicates that no data was submitted for this field

Level of ”Physical Risk Quantity” for the institution’s main campus as indicated by the World Resources Institute Aqueduct Water Risk Atlas:
Medium to High

Total water withdrawal (potable and non-potable combined):
Performance Year Baseline Year
Total water withdrawal 108,122,000 Gallons 113,582,000 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 108,122,000 Gallons 113,582,000 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Period July 1, 2018 June 30, 2019
Baseline Period July 1, 2007 June 30, 2008

A brief description of when and why the water use baseline was adopted:

We use 2008 as our baseline for all measures.


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 4,725 3,753
Number of employees resident on-site 20 25
Number of other individuals resident on-site 78 0
Total full-time equivalent student enrollment 15,983 13,923
Full-time equivalent of employees 2,844 2,639
Full-time equivalent of students enrolled exclusively in distance education 534 114
Weighted campus users 14,984 13,280.50

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 7,215.83 Gallons 8,552.54 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
15.63

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 4,414,199 Gross square feet 3,647,900 Gross square feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 24.49 Gallons per square foot 31.14 Gallons per square foot

Percentage reduction in potable water use per unit of floor area from baseline:
21.33

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 28.70 Acres 26.90 Acres

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 3,767,317.07 Gallons per acre 4,222,379.18 Gallons per acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
10.78

A brief description of the institution's water-related behavior change initiatives:

We have systematically retrofitted our facilities for water efficiency and engaged in education and outreach towards this end. In 2014/15 we did a research project on behavior vs. retrofit interventions in the residence hall setting.


A brief description of the institution's water recovery and reuse initiatives:

Loyola has installed permeable pavers, drought-tolerant landscaping, rain-water collection cisterns, and living rooftops that all seek to reduce and divert stormwater run-off that otherwise would enter sewer systems, requiring energy-intensive cleaning and purification processes. The cisterns connect to Lake Michigan and feed back over 10 million gallons of water annually to the Great Lakes watershed. Semi-permeable paving material is also used on campus and semi-permeable artificial turf is used on Sean Earl Field inside the track, allowing rain-water to percolate into the ground.


A brief description of the institution's initiatives to replace plumbing fixtures, fittings, appliances, equipment, and systems with water-efficient alternatives:

High efficiency fixtures are standard in any retrofit or new construction. A student project identified available water retrofits in all residence halls and the Water Tower Campus. A grant provided funding to implement these retrofits as well as a test a behavior change campaign focused on water use.


Website URL where information about the institution’s water conservation and efficiency efforts is available:
Additional documentation to support the submission:
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Data source(s) and notes about the submission:
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