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Drouin Wastewater Treatment Plant

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To meet the needs of Drouin’s population now and into the future, we are upgrading the town’s wastewater treatment plant.

Watch an update from James, Senior Engineer Major Infrastructure Projects (video produced in July 2021).

Update – March 2022

Our new $55 million Drouin wastewater treatment plant has reached another milestone, with commissioning – a period of extensive testing and fine tuning of the new equipment and processes – now underway. This is expected to continue through most of 2022 with the plant being operational in 2023.

Landscaping of the site is also well underway. In mid-2022, we’ll begin installing solar panels, to equip the plant with renewable energy. These will be installed to float on our existing lagoon – an innovative use of the site and lagoon. Read our latest media release.


Update - March 2021

A milestone has been reached, as foundation works and construction of the actual building is now mostly complete and we have moved into the fit-out stage. Plant equipment has arrived on site, and is being installed. Read more in this media release.


Update - September 2020

Construction continued through winter with significant works undertaken on the main treatment element called the membrane bioreactor. In addition, a number of concrete pours have taken place for the main building and other facilities. Read our updated fact sheet for more information.

Why are we upgrading the Drouin Wastewater Treatment Plant?

Drouin’s population is growing rapidly and this means we need to expand the capacity of the existing wastewater (sewage) treatment plant to meet the town’s needs.

After weighing up environmental, technical, social and economic factors, Gippsland Water assessed that the best course of action is to build a new mechanical treatment plant on the existing site on Settlement Road.

Which type of treatment plant?

Different options were considered for treating Drouin’s wastewater including:

  • Having a variety of satellite wastewater treatment plants around Drouin;
  • Keeping a single, central Drouin wastewater treatment plant (which would require the existing treatment plant to be upgraded); and
  • A single treatment plant for both Warragul and Drouin.

After studying the options available, the lowest-cost option for customers was to maintain a single, central treatment plant for Drouin and undertake a major upgrade at that facility.

We then looked at different options to establish the best outcome for Drouin’s future.

These included:

  • Constructing additional lagoons; and
  • Constructing a mechanical treatment plant.

There is no room for additional lagoons on the existing site: additional land would need to be purchased. This was considered a very expensive option.

Alternatively, a mechanical treatment plant can be constructed on the same site and is much more cost effective than constructing additional lagoons.

It also provides higher quality treated wastewater for reuse or returning to the environment.

Building a new mechanical plant offers the best value to Gippsland Water customers and the community.

This new mechanical plant will work together with the existing lagoon system to produce wastewater that is suitable for returning to the environment.

What are the community and environmental benefits?

The upgrade will ensure a more flexible and robust wastewater treatment facility that delivers sustainable and affordable wastewater treatment to the residents of Drouin.

Improving the reliability of the plant has several community and environmental benefits:

  • Cleaner wastewater means less odour for nearby residents and better protection of public health.
  • The treated water released from the new treatment plant will be of higher quality, therefore protecting the ecology of local waterways and Westernport Bay.
  • Producing high quality treated wastewater could allow us to recycle more wastewater for irrigation.

Solar panels will be installed onsite to help run the plant.

How long will this take?

The project is progressing well. It is on track for completion in 2022-23.

We will keep the community informed throughout the process.


If you would like further information about Drouin’s new wastewater treatment plant, you can download our fact sheet.

About Us

Gippsland Water supplies fresh clean drinking water to more than 70,000 customers, and wastewater services to more than 63,000 customers across an area of more than 5,000 square kilometres. It maintains a $1 billion infrastructure network, which includes more than 2,000 kilometres of water mains, 15 water treatment plants, over 1,700 kilometres of sewer mains and 14 wastewater treatment plants.

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Contact Us

55 Hazelwood Road, Traralgon, VIC, 3844

Phone: 1800 050 500

Fax: (03) 5174 0103

Interpreter service: 1313 450


TTY: 1800 555 677

Email: contactus@gippswater.com.au