Overall Rating Platinum
Overall Score 85.39
Liaison Kira Stoll
Submission Date March 4, 2021

STARS v2.2

University of California, Berkeley
OP-21: Water Use

Status Score Responsible Party
Complete 3.82 / 4.00 Kira Stoll
Director of Sustainability
Office of Sustainability
"---" 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 583,975,568 Gallons 791,947,244 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 583,975,568 Gallons 791,947,244 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, 2007 Dec. 31, 2007

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

The baseline year of 2007 was the year prior to the adoption of the campus first water use goal that set in motion more mitigation measures; 2007 usage correlates with the UC Policy baseline of three years average 2006-2008.


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 10,264 7,180
Number of employees resident on-site 0 0
Number of other individuals resident on-site 0 0
Total full-time equivalent student enrollment 41,775 33,948
Full-time equivalent of employees 15,347 15,190
Full-time equivalent of students enrolled exclusively in distance education 0 0
Weighted campus users 45,407.50 38,648.50

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 12,860.77 Gallons 20,491.02 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:
37.24

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 16,599,236 Gross Square Feet 15,838,197 Gross Square Feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 35.18 Gallons / GSF 50.00 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:
29.64

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 178 Acres 178 Acres

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 3,280,761.62 Gallons / Acre 4,449,141.82 Gallons / Acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
26.26

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

The ongoing drought conditions in California have kept messaging about water use visible in signing at the Recreation Sports facilities and various locations around campus.


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

Rainwater is reused each year for irrigation at the UC Berkeley School of Law. In addition, some recycled/reused water from the Eshleman rain water system is used in the building. Finally, the Chou Hall at the Haas School of Business also recycles rain water capture and reuse.

The campus also uses well (ground) water for pressure washing of sidewalks, pathways, egresses, entries, patios and stairs.


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

The campus during renovation projects replaces domestic water features with more efficient models as a regular practice.

Students working with housing staff have tested and installed different low-flow shower heads and toilets in residence halls. The Green Labs program has piloted autoclave retrofits that show to achieve water savings. Large equipment replacements like cooling towers have improved conservation.


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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Information in this field was provided Office of Sustainability and by the UC Berkeley Facilities Services.

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.