Overall Rating Silver
Overall Score 59.36
Liaison Laura Minchella
Submission Date July 30, 2021

STARS v2.2

University of Sydney
OP-21: Water Use

Status Score Responsible Party
Complete 3.28 / 4.00 Zoe Morrison
Strategy Advisor
Strategy Office
"---" 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 606,281 Cubic Metres 704,223 Cubic Metres

Potable water use:
Performance Year Baseline Year
Potable water use 254,638 Cubic Metres 469,717 Cubic Metres

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 date sequence follows the University requirements for TEFMA. 2017/2018 was considered a normal year, in terms of rainfall, student attendance and irrigation use. It was also the year before the University began intervention and infrastructure upgrades to reduce it's potable water use.


Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 2,051 1,188
Number of employees resident on-site 10 10
Number of other individuals resident on-site 13 13
Total full-time equivalent student enrollment 54,904.16 52,246.30
Full-time equivalent of employees 7,361.90 7,077.20
Full-time equivalent of students enrolled exclusively in distance education 0 0
Weighted campus users 47,227.80 44,805.13

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 254,638 Cubic Metres 469,717 Cubic Metres

Percentage reduction in potable water use per weighted campus user from baseline:
48.57

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 853,684 Gross Square Metres 848,662 Gross Square Metres

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 0.30 Cubic Metres / GSM 0.55 Cubic Metres / GSM

Percentage reduction in potable water use per unit of floor area from baseline:
46.11

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 166 Hectares 166 Hectares

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 3,652.30 Cubic Metres / Hectare 4,242.31 Cubic Metres / Hectare

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:
13.91

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

The University has a long-standing 'Stop the Drip' campaign running throughout all campuses. The campaign, via posters and stickers, encourages staff and students to report leaks (and other sustainability-related issues such as A/C units/areas that won't turn off, temperature irregularities etc.) The Campus Operations Services prioritises these issues to be fix as a priority 2 issue (priority 1 is restricted to risk to life/injury issues).


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

Mentioned in OP22 - Rainwater Management


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

During the performance reporting year, the University opened a number of buildings with integrated rainwater tanks. These tanks are linked to the building water filtration system to accommodate the flushing of toilets and other non-drinking requirements. This reduced the amount of potable water drawn from the mains.

In 2019, University of Sydney commenced the roll out of the Hunter Hydrawise irrigation controllers to better control, understand,standardise and centralise the irrigation within the campus landscape.
Aims and objectives were to bring many outdated and old irrigation controllers into a more modern control system with remote access. The ideal that many, if not all, controllers could be ultimately monitored remotely from a central PC with water saving software that is weather based to save water and ensure that irrigation was only occurring when programmed or needed. Adjustments automatically occur through weather enabled feed in to the controller on a daily basis.
Estimated water savings since the implementation of the Hydrawise program are approximately 30%.


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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Part 3: The total vegetative grounds amount of 166hec is the vegetative ground that receives watering. Omitted from this total is grounds used for farming or animal use (where no water feed systems were present) and ground not currently irrigated.

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.