Our Waterwise Office program acknowledges best practice water management in large commercial office buildings.

This free program provides a benchmark for water efficiency in businesses that haven not already invested in a water rating through the National Australian Built Environment Rating System (NABERS).

Case studies show that bench-marking water use and planning for improvement can reduce operating costs including sewer volume charges and the costs associated with heating, pumping and treating water.

Program benefits

  • Recognition as a leader in water efficiency by Water Corporation, Property Council of Australia and City of Perth 
  • Exclusive access to the waterwise logo
  • Access to tools such as data loggers and resources (stickers and posters) to encourage waterwise behaviours
  • Potential for improved sustainability ratings and reduced operational costs and water use achieved by improved water efficiency
  • A competitive edge when promoting your business as a sustainable place to work
  • Opportunities to show case your water saving initiatives through case studies on our website
  • Invitations to workshops, offers, networking and industry events
  • Free online Waterwise Training for the team at your office

How to become a Waterwise Office

To join our program your office must have a net lettable area (NLA) larger than 5,000m2 and commit to the following:

Industry baseline

The industry baseline was determined through a review completed by HFM Asset Management, on behalf of the Water Corporation and Property Council of Australia, of water use and net lettable area (NLA) data for office buildings with a NLA greater than 5,000m2 within the Perth, East Perth and West Perth CBD.

The results of this review are used to determine the waterwise recognition categories for water-cooled and air-cooled buildings.

The industry baseline is reviewed every 2 years to ensure best practice water use within waterwise offices. Read the full report here.

Recognition categories

Table showing Waterwise Office Program recognition categories  
  Water cooled benchmark NABERs water rating  Air cooled benchmark  NABERS water rating

Endorsed (industry baseline)

0.75 - 0.86 3.0 - 3.5  0.61 - 0.75  3.5 - 4.0
Silver 0.61 – 0.75  3.5 – 4.0   0.48 – 0.61  4.0 – 4.5
Gold* 0.48 – 0.61  4.0 – 4.5  0.35 – 0.48   4.5 – 5.0
Platinum* 0.35 – 0.48  4.5 – 5.0   <0.35  >5.0

This information is provided as a guide only.

*To be eligible to receive Gold or Platinum levels of recognition a current NABERS Water Rating is required. This allows us to independently validate the results of high performing buildings before they are recognised as such.

Water use performance

To calculate your water use performance, divide your annual water use (based on reading year – contact us if you need the data) by your NLA. This gives your water use performance in kilolitres per square meter per year.

Tip! Use your submeter data to subtract water use from other facilities, such as food or retail outlets, in your calculations.

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