Overall Rating	Silver - expired
Overall Score	50.03
Liaison	Mike Evans
Submission Date	May 28, 2019
Executive Letter	Download

STARS v2.1

Williams College
OP-22: Water Use

Status

Score

Responsible Party

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

Part 1

Total water use (potable and non-potable combined):

	Performance Year	Baseline Year
Total water use	40,026,228 Gallons	46,851,728 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	40,026,228 Gallons	42,406,614.75 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

If end date of the baseline year/period is 2004 or earlier, provide:

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	1,966	1,851
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	2,073	1,997
Full-time equivalent of employees (staff + faculty)	1,125	989
Full-time equivalent of students enrolled exclusively in distance education	0	0
Weighted campus users	2,986.50	2,733.25

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	13,402.39 Gallons	15,515.09 Gallons

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

13.62

Part 2

Gross floor area of building space:

	Performance Year	Baseline Year
Gross floor area	2,996,585 Gross square feet	2,366,400 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 per square foot	17.92 Gallons per square foot

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

25.46

Part 3

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	91,865.96 Gallons per acre	107,355.17 Gallons per acre

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

14.43

Optional Fields

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:

https://sustainability.williams.edu/water

Additional documentation to support the submission:

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Data source(s) and notes about the submission:

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