Overall Rating Reporter
Overall Score
Liaison Chelsea Hamilton
Submission Date March 4, 2022

STARS v2.2

Vanderbilt University
OP-21: Water Use

Status Score Responsible Party
-- Reporter Chelsea Hamilton
Sustainability Outreach Coordinator
Sustainability and Environmental Management Office
"---" 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:
Low to Medium

Total water withdrawal (potable and non-potable combined):
Performance Year Baseline Year
Total water withdrawal 255,480,729 Gallons 1,419,611,966 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 241,712,460 Gallons 1,369,611,966 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Period July 1, 2016 June 30, 2016
Baseline Period July 1, 2005 June 30, 2006

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

NA


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 6,195 6,210
Number of employees resident on-site 29 7
Number of other individuals resident on-site 1,131 832
Total full-time equivalent student enrollment 12,210 11,037
Full-time equivalent of employees 23,611 19,437
Full-time equivalent of students enrolled exclusively in distance education 0 0
Weighted campus users 29,552.75 25,241.75

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 8,179.02 Gallons 54,259.79 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
84.93

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 16,147,947 Gross Square Feet 13,186,242 Gross Square Feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 14.97 Gallons / GSF 103.87 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:
85.59

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 113.45 Acres 120.01 Acres

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 2,251,923.57 Gallons / Acre 11,829,113.96 Gallons / Acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
80.96

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

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

Close to 700,000 gallons of condensate is collected from air handlers at The Commons Center and pumped into cooling towers at the on-campus chiller plant. 6 million gallons of condensate is collected in the same manner from MRB III and 5 million gallons from MRB IV. Cooling towers typically use treated, domestic water, and the colder this water is the more efficiently the building’s air conditioning system can operate. Significant savings are seen particularly on hot, humid days, when the cooling system removes large amounts of condensation from the air. The new Engineering Science Building has a cistern that collects stormwater from the roof and water from air handlers. The water is stored in a 10,000 gallon cistern and used for irrigation on site. Additionally, a percentage of water that is collected and pumped out of underground utility tunnels is used to irrigate sports fields and lawns on campus, reusing water that would otherwise be pumped into a recharge well in place of using potable water for irrigation.

Vanderbilt is currently undergoing a Land Use Master Planning effort that will include a Sustainability Plan as well as a Stormwater Plan, which will guide these efforts on campus for future years. Specific recommendations will be made for how Vanderbilt should be collecting and reusing water in the master plan. https://www.vanderbilt.edu/chancellor/land-use-planning-initiative/


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

The majority of campus fixtures have been upgraded to water-efficient alternatives. In the 2013/2014 academic year, Vanderbilt retrofitted all 1,000 residence hall shower heads on campus to high-performance, low-flow models through a Green Fund project. This improvement will yield a savings of 28 million gallons of water annually.

Plumbing retrofits completed an additional 3,500 water-saving bathroom fixtures, conserving over 60 million gallons of water and saving over $300,000 each year.

In 2016 all 74 of the urinals in the stadium were replaced with ultra-low flow fixtures that use only 0.125 gal/flush. The new fixtures use 95% less than the old fixtures. The upgrade will save 355,000 gallons of water each year.


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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