Overall Rating	Silver
Overall Score	53.91
Liaison	Tom Hartzell
Submission Date	Dec. 21, 2022

STARS v2.2

Calvin University
OP-21: Water Use

Status

Score

Responsible Party

1.52 / 4.00

Nick Thompson
Associate Director Building Services
Physical Plant

"---" 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	52,619,354 Gallons	67,017,046 Gallons

Potable water use:

	Performance Year	Baseline Year
Potable water use	42,665,920 Gallons	46,981,880 Gallons

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

	Start Date	End Date
Performance Period	July 1, 2021	June 1, 2022
Baseline Period	Jan. 1, 2009	Dec. 31, 2009

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:

The baseline year was selected because it is after major renovations and building construction. The baseline year is recent enough to capture reliable data from the past and assess progress on sustainability efforts.

Figures needed to determine "Weighted Campus Users":

	Performance Year	Baseline Year
Number of students resident on-site	1,920	2,284
Number of employees resident on-site	15	10
Number of other individuals resident on-site	9	0
Total full-time equivalent student enrollment	3,372	3,983
Full-time equivalent of employees	594	816
Full-time equivalent of students enrolled exclusively in distance education	194	0
Weighted campus users	3,321.75	4,172.75

Potable water use per weighted campus user:

	Performance Year	Baseline Year
Potable water use per weighted campus user	12,844.41 Gallons	11,259.21 Gallons

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

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	2,212,026 Gross square feet	2,263,247 Gross square feet

Potable water use per unit of floor area:

	Performance Year	Baseline Year
Potable water use per unit of floor area	19.29 Gallons per square foot	20.76 Gallons per square foot

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

7.08

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

Area of vegetated grounds:

	Performance Year	Baseline Year
Vegetated grounds	340 Acres	316 Acres

Total water withdrawal per unit of vegetated grounds:

	Performance Year	Baseline Year
Total water withdrawal per unit of vegetated grounds	154,762.81 Gallons per acre	212,079.26 Gallons per acre

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

27.03

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:

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

Low flow shower heads have been installed in the dorms and apartments.

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

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Additional documentation to support the submission:

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Data source(s) and notes about the submission:

Note:
Potable water use came from Nick Thompson - water purchased from city FY 21-22

Non-potable water:
groundwater withdraw: 27,203,040 gallons
domestic water irrigation use: 295,729 gallons

Vegetated grounds = the ecosystem preserve (100) + mowed lawns (106) + natural areas (129) + gardens/beds (5) = 340 acres.