Overall Rating Silver
Overall Score 52.54
Liaison Becky Haney
Submission Date Feb. 26, 2020

STARS v2.2

Calvin University
OP-21: Water Use

Status Score Responsible Party
Complete 1.28 / 4.00 Jack Phillips
Mechanical Director
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 59,215,354 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 Jan. 1, 2019 Dec. 31, 2019
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 1,912 2,284
Number of employees resident on-site 12 10
Number of other individuals resident on-site 20 0
Total full-time equivalent student enrollment 3,855.10 3,983
Full-time equivalent of employees 751.60 816
Full-time equivalent of students enrolled exclusively in distance education 13.50 0
Weighted campus users 3,945.90 4,172.75

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 10,812.72 Gallons 11,259.21 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
3.97

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 2,210,347 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 19.30 Gallons / GSF 20.76 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:
7.01

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 174,162.81 Gallons / Acre 212,079.26 Gallons / Acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
17.88

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:
---

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

Additional documentation to support the submission:
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Note:
Potable water use came from Jack Phillips - water purchased from city FY 17-18.
Potable water use came from Jack Philips - water purchased from city FY 18-19

Non-potable water usage comes from Geoff Van Berkel. *note, this non-potable use comes calendar year 2018 while the potable use comes from the FY 2017-18.
Non-potable water usage came from Geoff Van Berkel *please see note above* 2018/2019

Non-potable water:
groundwater withdraw: 25,603,040 gallons
domestic water irrigation use: 335,729 gallons

Vegetated grounds = the ecosystem preserve (100) + mowed lawns (106) + natural areas (129) + gardens/beds (5) = 340 acres. Note: Waltman lake and Flat Iron lake areas are not counted.
(2.8.19 JW)
Suggestion for next year: Ask Geoff van Berkel to fill in optional boxes above.

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 and complete the Data Inquiry Form.