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
Complete 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

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

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:
0

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

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

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

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

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:
---

Additional documentation to support the submission:
---

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.


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.

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.