Your WEMP in 5 Steps

We’ve created this step-by-step guide to help you create a WEMP for your business, which details water saving actions and initiatives, and set water saving targets based on industry benchmarks.

The Waterwise Business Program forms part of the State-wide permanent water efficiency measures introduced in 2007 and aims to assists businesses save water and reduced costs.

Here we have broken the WEMP down in to its 5 major components to help you get started.

This section requires you to describe what your business does. For example:

Water Corporation is the principal supplier of water, wastewater and drainage services in Western Australia to hundreds of thousands of homes, businesses and farms, as well as providing bulk water to farms for irrigation.

Our services, projects and activities span over 2.6 million square kilometres. We have over 3,000 employees and participate in alliances to manage an asset base of over $15 billion in water supply, wastewater, drainage infrastructure and bulk water for irrigation.

This is also an opportunity to detail any water efficiency initiatives that have already been implemented at your site and tell us about your Water Management Team – the people who play a critical role in ensuring you achieve your water efficiency goals.

Your historical water use can be found on MyWater (our online account management system), your water bill or by contacting the Customer Centre on 13 13 85.

When you review your site's water use history, try to identify what represents 'business as usual'. If there is significant variance in annual water consumption please describe what has caused this. For example, maintenance shutdowns, refurbishment or expansion.

A Waterwise Auditor may be engaged to assess your site or you might want to complete the free water auditing training course and undertake your own site audit.

If an audit is not practical, you can use your experience and knowledge to estimate how water is used.

The action plan is your opportunity to list water efficiency initiatives and their estimated implementation date.

If you are unsure of what water saving opportunities are relevant to your site a Waterwise Auditor may be able to assist you. We also have a list of water saving tips for many businesses on our website.

The action plan has 3 sections: short, medium and ongoing:

  • A short term action is one that can be completed immediately or has a payback period within 12 months.
  • A medium term action is one that will take more than 12 months to implement or has a much longer pay-back period.
  • Ongoing actions should become 'business as usual' and do not have a particular end date.

Where possible you should estimate the cost to implement and potential water savings for each water efficiency initiative. 

This section is used to track the performance of customers in the program and also allows us to evaluate the program's effectiveness as a whole.

Your site's water use benchmark is used to track changes in water efficiency over time and is calculated using your individual measure of business activity.

For example:

  • hotels often use 'occupied room nights'
  • a swimming pool might use 'patrons per year'
  • shopping centres may use 'gross lettable area'.

If you are unsure about the most appropriate benchmark for your site please contact us or go to

Businesses that meet or exceed their water efficiency target may be eligible for an award as part of the Waterwise Business Recognition Scheme.

When you have completed your WEMP it must be signed by a senior representative of your business. This person should have the authority to approve water efficiency initiatives, provide adequate funding and regularly follow up to ensure the initiatives are implemented.

After we have accepted your WEMP it remains in force for 5 years, but can be reviewed if there are significant changes to the way your business operates. Each year participants in the program are also required to submit a short report that summarises your progress.

If you have questions or need help completing your WEMP or annual report, contact the Program Administrator on or by calling (08) 9420 3551.