Trentham is one of the fastest growing towns in our region. This project will help us to find additional water sources to meet the growing demand.

The town is currently supplied from reservoirs that receive water from a natural spring, and is supplemented by a pumping from a groundwater bore.

The need for additional supplies for Trentham is an action in our Urban Water Strategy 2022, our 50-year plan to secure water for future generations.

We are conducting further pumping tests on groundwater bores at its Trentham Water Treatment Plant.

The tests will start on Tuesday 11 May 2021 and continue for around one week.

The tests will provide information on water quality and a sustainable pump rate.

The Coliban Urban Water Strategy 2017 identified a shortfall at Trentham of up to 122 megalitres by 2040.

In 2019, we obtained an additional licence volume of 55 megalitres per year.

Last year we installed additional bores at the water treatment plant to increase the flow rate and establish a groundwater monitoring network so we can measure any changes in groundwater level and quality over time.

This information will support our application to Goulburn-Murray Water, the groundwater manager of the region, to increase our licence volume by a further 62 megalitres per year.

For further information our Water Resources Manager Brendan Cossens on 1300 363 200.

We are carrying out drilling works at our Trentham Water Treatment Plant on Lagoon Road to construct two additional bores as part of Trentham Groundwater Project.

The works started on Monday 4 May 2020 and are expected to be completed within two weeks.

We are drilling a slightly larger bore close to the existing bore to improve the flow rate and establish monitoring to measure any changes in groundwater levels and quality over time.

We will also drill another Bedrock Aquifer bore near our existing Basalt Aquifer monitoring bore on Bergs Lane.

We are undertaking additional groundwater monitoring at the request of Goulburn-Murray Water to progress the application to amend our licence.

We have installed new observation bores on Lagoon Road and we are regularly monitoring groundwater levels in the area to record any changes over time.

In the coming year we will equip one of our new production bores for further testing.


  • Timeline item 1 - complete

    Stage 1

    March 2018

    Investigation of existing production bore construction integrity and yield capacity found that additional bores were required to supplement supply.

  • Timeline item 2 - complete

    Stage 2

    August 2018

    Groundwater investigation drilling identified a suitable supply from the deep bedrock aquifer at the water treatment plant site on Lagoon Road.

  • Timeline item 3 - complete

    Stage 3

    November 2019

    Application to amend our existing groundwater licence to include new deep bore and increase the licence volume by 55 megalitres per year approved by Goulburn-Murray Water.

  • Timeline item 4 - complete

    Stage 4

    August 2020

    Installed two new deep bores and applied to Goulburn-Murray Water to amend existing licence to add bores and increase the volume by 62 megalitres per year.

  • Timeline item 5 - complete

    Stage 5

    May 2021

    We conducted pumping tests on bores at our Trentham Water Treatment Plant. The pumping tests yielded promising results.

    We provided the test results to Goulburn-Murray Water to support our application to amend our existing licence to take and use groundwater.