Overall Rating	Gold
Overall Score	69.67
Liaison	Julie Newman
Submission Date	Sept. 30, 2021

STARS v2.2

Massachusetts Institute of Technology
OP-21: Water Use

Status

Score

Responsible Party

2.67 / 4.00

MIT Office of Sustainability
Director
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:

Low to Medium

Part 1. Reduction in potable water use per person

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

	Performance Year	Baseline Year
Total water withdrawal	384,144,900 Gallons	376,931,434 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	236,766,687 Gallons	376,931,434 Gallons

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

	Start Date	End Date
Performance Period	July 1, 2019	June 30, 2020
Baseline Period	July 1, 2013	June 30, 2014

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:

A water use baseline of fiscal year 2014 is used to ensure consistency with other credits, with MIT's greenhouse gas commitment, and with MIT's previous STARS reporting.

Figures needed to determine "Weighted Campus Users":

	Performance Year	Baseline Year
Number of students resident on-site	5,851	6,007
Number of employees resident on-site	53	39
Number of other individuals resident on-site	600	411
Total full-time equivalent student enrollment	11,261	11,301
Full-time equivalent of employees	10,239	11,380
Full-time equivalent of students enrolled exclusively in distance education	0	0
Weighted campus users	18,201	18,933.25

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	13,008.44 Gallons	19,908.44 Gallons

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

34.66

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	12,162,657 Gross square feet	12,149,907 Gross square feet

Potable water use per unit of floor area:

	Performance Year	Baseline Year
Potable water use per unit of floor area	19.47 Gallons per square foot	31.02 Gallons per square foot

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

37.25

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

Area of vegetated grounds:

	Performance Year	Baseline Year
Vegetated grounds	97 Acres	97 Acres

Total water withdrawal per unit of vegetated grounds:

	Performance Year	Baseline Year
Total water withdrawal per unit of vegetated grounds	3,960,256.70 Gallons per acre	3,885,891.07 Gallons per acre

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

-1.91

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:

An innovative storm water retention and management system at the Stata Center employs a bioswale to capture and filter stormwater runoff. This water is harvested, filtered, and used as flushing water in the 430,000 GSF building. MIT deploys "smart metered" irrigation systems around campus to conserve water. In the central cooling plants, water is metered and monitored to identify potential water loss in the system.

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

MIT completed many water fixture retrofits throughout campus. Ultra low-flow fixtures are the installation standard for all replacements. New construction employs LEED gold design standards, which encourage water saving strategies.

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

https://sustainability.mit.edu/tab/water#:~:text=Water%20is%20an%20indispensable%20resource,cafeterias%2C%20laboratories%2C%20and%20landscaping

Additional documentation to support the submission:

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Data source(s) and notes about the submission:

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