Overall Rating	Gold
Overall Score	80.87
Liaison	Megan Butler
Submission Date	Jan. 26, 2024

STARS v2.2

Macalester College
OP-21: Water Use

Status

Score

Responsible Party

2.72 / 4.00

Nathan Lief
Facilities Director
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 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	28,898,745 Gallons	30,780,096 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	18,190,200 Gallons	24,189,337 Gallons

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

	Start Date	End Date
Performance Period	June 1, 2022	May 31, 2023
Baseline Period	June 1, 2014	May 31, 2015

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:

2014 is when the Energy Manager position was created and all energy savings are compared to that base year.

Figures needed to determine "Weighted Campus Users":

	Performance Year	Baseline Year
Number of students resident on-site	1,247	1,293
Number of employees resident on-site	7	14
Number of other individuals resident on-site	0	0
Total full-time equivalent student enrollment	2,154	2,020
Full-time equivalent of employees	661	591
Full-time equivalent of students enrolled exclusively in distance education	0	0
Weighted campus users	2,424.75	2,285

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	7,501.89 Gallons	10,586.14 Gallons

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

29.13

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	1,504,107 Gross square feet	1,482,248 Gross square feet

Potable water use per unit of floor area:

	Performance Year	Baseline Year
Potable water use per unit of floor area	12.09 Gallons per square foot	16.32 Gallons per square foot

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

25.89

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

Area of vegetated grounds:

	Performance Year	Baseline Year
Vegetated grounds	11 Acres	11 Acres

Total water withdrawal per unit of vegetated grounds:

	Performance Year	Baseline Year
Total water withdrawal per unit of vegetated grounds	2,627,158.64 Gallons per acre	2,798,190.55 Gallons per acre

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

6.11

Optional Fields

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

Where low flow aerators were installed, there are small cards drawing attention to the fact that the aerators were installed to reduce water consumption.

One resident hall and one house owned by the College have water consumption metered and is accessible to occupants.

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

We capture rainwater from a parking lot then hold it in a rain garden while it is being filtered, which eventually waters trees and other landscaping.

New rain gardens were added with the construction of the new Theater building.

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

In July 2019 we replaced (886) 2.0 & 2.5 GPM faucet aerators in buildings across campus with 1.0 & 1.5 GPM aerators.

In addition to the Leonard Center shower heads, in 2017 we replaced (266) 2.5 GPM shower heads in the residence halls and houses with 2.0 GPM shower heads

In 2020, new updated irrigation controllers were installed to reduce the amount of water needed to maintain the vegetation on campus.

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

https://www.macalester.edu/facilities/departments/energy/

Additional documentation to support the submission:

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Data source(s) and notes about the submission:

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