Overall Rating	Silver - expired
Overall Score	61.13
Liaison	Elizabeth Drake
Submission Date	March 6, 2020

STARS v2.2

Swarthmore College
OP-21: Water Use

Status

Score

Responsible Party

0.56 / 4.00

Ralph Thayer
Director of Maintenance
Facilities Management

"---" 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

Part 1. Reduction in potable water use per person

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

	Performance Year	Baseline Year
Total water withdrawal	35,007,000 Gallons	35,554,200 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	32,403,000 Gallons	29,123,145 Gallons

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

	Start Date	End Date
Performance Period	Jan. 1, 2019	Dec. 31, 2019
Baseline Period	Jan. 1, 2005	Dec. 31, 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:

2005 was the year of maximum energy use on campus and the baseline year for the previous STARS filing in 2017.

Figures needed to determine "Weighted Campus Users":

	Performance Year	Baseline Year
Number of students resident on-site	1,507	1,479
Number of employees resident on-site	5	0
Number of other individuals resident on-site	0	0
Total full-time equivalent student enrollment	1,664	1,474
Full-time equivalent of employees	926	683
Full-time equivalent of students enrolled exclusively in distance education	0	0
Weighted campus users	2,320.50	1,987.50

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	13,963.80 Gallons	14,653.15 Gallons

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

4.70

Part 2. Reduction in potable water use per unit of floor area

Gross floor area of building space:

	Performance Year	Baseline Year
Gross floor area	1,715,494 Gross square feet	1,444,010 Gross square feet

Potable water use per unit of floor area:

	Performance Year	Baseline Year
Potable water use per unit of floor area	18.89 Gallons per square foot	20.17 Gallons per square foot

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

6.35

Part 3. Reduction in total water withdrawal per unit of vegetated grounds

Area of vegetated grounds:

	Performance Year	Baseline Year
Vegetated grounds	384 Acres	384 Acres

Total water withdrawal per unit of vegetated grounds:

	Performance Year	Baseline Year
Total water withdrawal per unit of vegetated grounds	91,164.06 Gallons per acre	92,589.06 Gallons per acre

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

1.54

Optional Fields

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

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

A cistern was installed to store the rain water from our Science Center roof areas. That water is used for the gardens around the Science Center. A cistern was also installed at the Wister Center.

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

All new buildings, especially Singer Hall, have low-flow fixtures in bathrooms and laboratories. A vacuum pump system has eliminated water siphon use on campus. All dorm shower heads were replaced with water-efficient alternatives in 2017 after the previous STARS report was filed.

Website URL where information about the institution’s water conservation and efficiency efforts is available:

http://swarthmore.edu/sustainability/land-and-natural-environment

Additional documentation to support the submission:

---

Data source(s) and notes about the submission:

Info from Ralph and from IR Factbooks for 2019 and 2005. https://mail.google.com/mail/u/0/#inbox/15a8abec779872bf?projector=1

Potable water use is assumed to be taxable sewer use (total billed water for 2019 minus irrigation and cooling tower water), because we effectively are using potable water for bathing, cooking, and toilet flushing and this all goes into the sewer (and for which we pay a sewer fee).