Overall Rating Silver
Overall Score 50.03
Liaison Caroline Bruno
Submission Date May 28, 2019
Executive Letter Download

STARS v2.1

Williams College
OP-22: Water Use

Status Score Responsible Party
Complete 2.97 / 5.00 Ken Jensen
Assistant Director for Facility Operations
Facilities
"---" 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’s Aqueduct Water Risk Atlas:
Medium to High

Total water use (potable and non-potable combined):
Performance Year Baseline Year
Total water use 40026228 Gallons 46851728 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 40026228 Gallons 42406614.75 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Year Oct. 31, 2017 Nov. 1, 2018
Baseline Year July 1, 2004 June 30, 2005

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

To attempt to keep a consistent baseline year throughout the report - this was our baseline year when first submitting STARS


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 1966 1851
Number of employees resident on-site 106 124
Number of other individuals resident on-site and/or staffed hospital beds 70 0
Total full-time equivalent student enrollment 2073 1997
Full-time equivalent of employees (staff + faculty) 1125 989
Full-time equivalent of students enrolled exclusively in distance education 0 0
Weighted campus users 2986.50 2733.25

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 13402.39 Gallons 15515.09 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
13.62

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 2996585 Gross Square Feet 2366400 Gross Square Feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 13.36 Gallons / GSF 17.92 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:
25.46

Does the institution wish to pursue Part 3 of this credit? (reductions in total water use per acre/hectare of vegetated grounds):
Yes

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 435.70 Acres 436.42 Acres

Total water use (potable + non-potable) per unit of vegetated grounds:
Performance Year Baseline Year
Total water use per unit of vegetated grounds 91865.96 Gallons / Acre 107355.17 Gallons / Acre

Percentage reduction in total water use per unit of vegetated grounds from baseline:
14.43

A brief description of the institution's water-related behavior change initiatives, e.g. initiatives to shift individual attitudes and practices such as signage and competitions:

Bathrooms contain signs that show how many gallons of water are used for different lengths of shower time.


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

In the Class of 1966 Environmental Center, LBC petal certified, grey water is treated onsite. There are also water retention ponds in low-lying areas of the site, one of which contains a solar powered pump and allows for the rainwater to be used to water the orchard trees when it is needed.


A brief description of the institution's initiatives to replace plumbing fixtures, fittings, appliances, equipment, and systems with water-efficient alternatives (e.g. building retrofits):

We now replace 1.6 gallon flush toilets with 1.28 gallon flush toilets. Water efficient fixtures and appliances were added across campus such as low flow showers, low flow sink fixtures, waterless urinals, and water efficient dishwashers.


The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:
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The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution and complete the Data Inquiry Form.