Overall Rating Silver
Overall Score 50.52
Liaison Megan Varnadore
Submission Date Feb. 18, 2021

STARS v2.2

Sonoma State University
OP-21: Water Use

Status Score Responsible Party
Complete 0.38 / 4.00 Shawn Potts
Facilities Operations Manager
Operations and Engineering
"---" 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 129,808,698 Gallons 137,259,648 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 66,972,016.20 Gallons 65,700,140.10 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Period July 1, 2018 June 30, 2019
Baseline Period July 1, 2017 June 30, 2018

A brief description of when and why the water use baseline was adopted:

The baseline year of July 1, 2017, to June 30, 2018, was adopted as there was no sufficient data available during the previous years.


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 3,174 3,133
Number of employees resident on-site 13 12
Number of other individuals resident on-site 11 4
Total full-time equivalent student enrollment 8,671 8,212
Full-time equivalent of employees 1,145.70 1,083.70
Full-time equivalent of students enrolled exclusively in distance education 0 0
Weighted campus users 8,170.28 7,762.03

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 8,197.03 Gallons 8,464.30 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
3.16

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 2,433,813 Gross Square Feet 2,433,813 Gross Square Feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 27.52 Gallons / GSF 26.99 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:
0

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 30 Acres 30 Acres

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 4,326,956.60 Gallons / Acre 4,575,321.60 Gallons / Acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
5.43

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

Some of the ways the University has reduced the use of potable over many years is as follows:
* Low flow showers, faucets, and toilets throughout the housing.
* Low flow and dual plumbed urinals and toilets in new construction (do not use potable water)
* Replacing lawn with more drought tolerant landscape, including the drought-tolerant lawn.
* Irrigating virtually all landscape with reclaimed water and not potable water
* Even with using reclaimed we mulch and take numerous additional steps to minimize irrigation.
* Pool covers save the campus 250,000 gallons of potable water per year.


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

The City of Santa Rosa provides recycled water to the University for use in the irrigation and fire suppression systems. Recycled Water undergoes three levels of treatment that includes filtering and UV disinfection in the last step.


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

All the buildings are equipped with Low-flow faucets with an aerator installed in them to mix water with a steady flow of air, maintaining water pressure but cutting clean water consumption by as much as 40%, from 4 gallons per minute to 2.5.


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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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.