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Project goal:

Investigate what water sources are needed to maintain a reliable drinking water supply to the Lower Great Southern area into the future.

Status:

In planning

Delivery Date:

2029/2030

What's happening?

In response to climate change impacts and forecast increases in demand on our drinking water supplies, we are currently investigating what water sources may be needed to maintain a reliable drinking water supply via the Lower Great Southern Towns Water Supply Scheme (LGSTWSS).

These include:

  • new groundwater sources in the vicinity of Albany;
  • local seawater desalination. 

Where does Albany currently get its water?

The LGSTWSS supplies drinking water to Albany, Mount Barker, Kendenup and Narrikup and Denmark (as required) from local groundwater sources on the South Coast and surface water from Angove River east of Albany.

How far have you progressed with your investigations?

Over the last 24 months we have completed:

  • marine investigations
  • environmental assessments
  • land and marine environmental surveys
  • stakeholder briefings and meetings

Following recent announcements, we are no longer progressing investigations into a potential desalination plant at King George Sound in Albany. 

We are still in the planning  phase of the project will continue investigating seawater desalination and groundwater options. We will provide further updates in coming weeks.

When will you decide what the future water source/s will be?

We will continue to engage with key stakeholders, including government agencies and the community, before and after making a decision on the next source for the LGSTWSS. A decision is planned for late 2025 following a detailed analysis of data and results.

We are committed to keeping the local community updated as we investigate the viability of sources and promote opportunities for community feedback.

Project timeline

Project timeline
Date Activity/Milestone
Late 2021
  • Completed initial environmental surveys of investigation areas
  • Project website established 

2022

  • Commenced Traditional Owner engagement
  • Completed initial Aboriginal Heritage surveys of investigation areas
Late 2022 - early 2023
  • Commenced key stakeholder briefings on new source options:
    • Project fact sheet to over 50 community, industry and stakeholder groups
    • Over 20 in-person meetings
  • Completed customer research to gather key insights which included 6 focus groups and 450 surveys
  • Completed ground based electromagnetic surveys for potential groundwater sites
2023
  • Commenced marine water quality investigations for potential desalination intake and outfall options
    Completed further phases of planning, including identification of technical investigations required to assess water source options
  • Commenced broader community engagement:
    • Drop-in sessions at Albany Public Library and Albany Farmers market
  • O2 Marine technical viability and environmental approval assessment 
 2024
  • Site visit with Traditional Owners
  • Community information stand at Albany Port Open Day
  • Completed comprehensive desktop review of publicly available data to inform environmental assessment of SDP source options
  • Completed further environmental surveys of investigation areas
  • Commenced engineering investigations
  • Stakeholder briefings with City of Albany and Councillors, community and industry groups
Early 2025 Following recent announcements we will be investigating alternative options outside of Kind George Sound.
 2029/2030 Complete delivery of new source/s.

23 January 2025

Following recent announcements, we are no longer progressing investigations into a potential desalination plant at King George Sound in Albany. 

We are still in the planning phase of the project will continue investigating seawater desalination and groundwater options. We will provide further updates in coming weeks.

Time icon

27 April 2024

The project team attended the Albany Port Open Day on the 27th of April 2024 to share the latest on our new water source investigations with the local community.

It was great to take part in such a well-run event. Seeing the scale of the operations and learning about the inner workings of the port was fascinating! 

We spoke to over 100 local community members on the day and had really valuable conversations, not only about our investigations, but also about our existing water source and the challenges we're facing with the effects of climate change and forecast increases in demand.

Thanks to everyone who came down and we look forward to seeing you again when we are next in Albany. 

Project team at the Albany Port Open Day

15 February 2024

In mid-February 2024, the project team took six members of the Wagyl Kaip Southern Noongar Aboriginal Corporation Cultural Advisory Committee on a half-day tour of the proposed desalination sites.

The purpose of the tour was for the project team to understand the cultural values of the proposed desalination sites and incorporate any feedback from Wagyl Kaip SNAC CAC into our decision making.

We will now progress with further surveys to support our ongoing investigations. 

Water Corporation Project team with Wagyl Kaip Southern Noongar AC CAC

 

28 June 2023

Water Corporation’s authorised consultants, Advisian, and a commercial boat operator will begin investigations in Frenchman Bay, Princess Royal Harbour and off the South Coast in late June 2023. 

The work will take three days. Exact work dates will depend on weather conditions and availability of contractors and their vessels. Further sampling and data collection will take place on a quarterly basis for up to 24 months. 

Waterdrop

27 May 2023

The project team hosted two drop-in sessions in Albany on Friday, 26 May and Saturday, 27 May 2023. 

We had many interesting conversations and received useful feedback that will help inform our investigation pathway. Thank you to those who joined us to learn more about our new water source investigations.

We are now progressing with further planning for the investigations, and will keep the community updated as we progress. Sign up for updates via the link on the webpage to hear the latest project news.

The project team at the Albany Farmer's Market

29 July 2022

We’re pleased to advise fieldwork for our Aboriginal Heritage survey in the Manypeaks, Two Peoples Bay, Big Grove, Little Grove and Goode Beach areas has now been completed. This work is part of an investigation into groundwater and seawater desalination as future water source options in the areas.

Thank you to those landowners for facilitating access to private properties.

16 December 2021

We’re pleased to advise fieldwork for our environmental survey in the Manypeaks, Two Peoples Bay, Torndirrup, Big Grove, Little Grove and Goode Beach areas has now been completed. This work is part of an investigation into groundwater and seawater desalination as future water source options in the areas.

Thank you to those landowners for facilitating access to private properties. The survey area was large – extending much further than the actual area required for any infrastructure – to ensure we could capture accurate environmental data and to put any results into context. The consultants will now take the next few months to sort and analyse all the data collected, and prepare findings.

Next, we are preparing to undertake Aboriginal heritage surveys in the same areas with Traditional Owners, in the new year. We will write to affected landowners regarding this.

Happy holidays!

For more information, please refer to the frequently asked questions below.

The LGSTWSS supplies drinking water to Albany, Mount Barker, Kendenup and Narrikup and Denmark (as required) from local groundwater sources on the South Coast and from surface water from Angove River near Two Peoples Bay, east of Albany. 

We continue to respond proactively to the ongoing challenges of climate change by investigating potential new water sources for the LGSTWSS.

These include:

  • new groundwater sources;
  • local seawater desalination.

Before we determine the location of a preferred water source, we consider the following factors at a minimum: 
water quality

  • drying climate patterns and rainfall / streamflow data
  • environmental considerations, including impact of drawing water on local ecosystems and construction impacts on existing flora and fauna habitats
  • heritage and Native Title rights
  • community feedback
  • impact on private landowners
  • water treatment requirements
  • amount of water we expect to draw from the source and;
  • cost of supplying water to our customers including building the required infrastructure.
 

We are still in the early stages with a decision on preferred option/s expected in 2025, following a detailed review of data and results.

We will engage with DWER, other government agencies, stakeholders and the community before making decisions on future sources for the region. 

Water Corporation is working with the Department of Water and Environmental Regulation (DWER) as we investigate long-term supply options. DWER is developing the Albany and hinterlands water allocation plan for public comment. It covers how groundwater and surface water will be managed and regulated in this area. The plan sets limits about how much water can be used and how much is left in the aquifer for the environment.

Water Corporation also continues to liaise with the Department of Primary Industries and Regional Development (DPIRD) about a potential seawater desalination plant.  DPIRD is working with the Minister for Fisheries to confirm the Albany Aquaculture Development Zone.

 

We encourage people in areas with steady rainfall, like the South West and Great Southern regions, to install rainwater tanks. Collecting rainwater is useful, but it doesn’t completely solve water supply issues, especially with changing climate patterns. Rainwater tanks can also be more costly compared to other options, so we suggest using them for household purposes, if preferred. To help with this, we offer financial support such as showerhead swaps and rebates on rainwater tanks. These rebates are only available in the Great Southern and South West regions due to their reliable rainfall. For more details, check our Waterwise Towns webpage to see offers available in your area.

Local Government is responsible for the operation approvals and installation of greywater systems in Western Australia. The West Australian Greywater Guide provides further information on how to best reuse domestic greywater in Western Australia

Denmark is now connected to the Lower Great Southern Towns Water Supply Scheme (LGSTWSS) and is part of our planning investigations for a new water source. Connecting Denmark to the scheme has been part of long-term planning for the region due to the unreliability of surface water (dams) as a water source.

There is no change in pricing of water linked to new capital investment. Albany residential customers pay the same price as other residential customers across the state for water use up to 500kL/year.

Information about seawater desalination

Seawater desalination works by separating water molecules from seawater. First, seawater is screened and pre-treated to remove large particles like seaweed and sand. The seawater is fed to reverse osmosis membranes, where water molecules pass through, and the remaining seawater becomes saltier. About 40% of the seawater becomes freshwater for drinking and the remaining 60% is brine.  The brine is nearly twice as salty as the seawater.

Plant - A desalination plant is a facility that removes salt and other impurities from seawater to make it safe for drinking. 
Seawater Intake Pipeline - A seawater intake pipeline is an important part of a desalination plant. Its purpose is to transport seawater from the ocean to the desalination plant for processing. 
Brine Outfall Pipeline / Brine Diffuser - A brine outfall pipeline is used to return the concentrated seawater (brine) back to the ocean after it has been desalinated. The brine is typically about twice the saltiness of seawater.
Diffuser - A diffuser is a device at the end of an outfall that returns brine to the ocean. Diffusers help mix and dilute the brine with seawater. The diffuser helps to quickly reduce the brine's salinity to match the surrounding seawater generally within tens of metres for small seawater desalination plants, such as proposed for Albany.
Integration pipeline – refers to a pipeline transferring the drinking water from the desalination plant to the existing water supply network.
 

In seawater desalination plants, brine is the salty byproduct returned to the ocean. It is typically twice as salty as seawater because about half the freshwater is removed. Brine may contain very small amounts of food-grade chemicals like anti-scalants and cleaning agents. They are used to keep the membranes working efficiently.  Only chemicals approved by the Department of Health for use in drinking water are used. 

Brine is returned to the ocean through a brine outfall pipeline with a diffuser at the end. Diffusers help rapidly mix and dilute the brine with seawater. The diffuser helps to quickly reduce the brine's salinity to match the surrounding seawater generally within tens of metres. Mixing and dilution minimises the impact on marine life and ecosystems. Brine will keep mixing with seawater after it leaves the diffuser. It will not form pools of hypersaline water or collect in depressions or basins. Brine dispersion modelling is used to predict how the brine will mix and dilute when it enters the ocean. The modelling uses wave and current data collected from the proposed site. This modelling helps us design diffusers that would work best for the specific site conditions.
 

Do you have a question about this project? Please submit your enquiry below.

Contact Us

Carina Harris - Community Engagement Specialist

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