Picton Wastewater Scheme and Water Recycling Plant

We’re upgrading Picton Water Recycling Plant to service new connections and growth in the area.

Work started in mid 2016 and is expected to be completed in mid 2019. 

Green pasture grass with rural hills behind in background

Recycled water is used to irrigate up to 119 hectares of pasture land at Picton Farm.

About the project

We’re upgrading Picton Water Recycling Plant to increase the volume of wastewater that can be treated. This work is expected to be completed by mid 2019.

Upgrades to Picton Water Recycling Plant

Picton Water Recycling Plant treats wastewater that’s been used in about 3,800 homes and businesses in Picton, Tahmoor, Thirlmere, Bargo and Buxton.

The Picton Wastewater Scheme currently includes:

  • pipelines and pumping stations
  • Picton Water Recycling Plant, which is designed to treat an average of 2.6 million litres of dry weather wastewater flows a day
  • the use of high quality recycled water at Picton Farm to irrigate up to 119 hectares of crops 
  • precautionary discharge of excess recycled water to Stonequarry Creek.


We're constructing extra facilities at the plant to treat up to four million litres of wastewater a day. This includes:

  • two additional intermittently decanted aerated lagoons (IDALs)
  • new inlet pipes and infrastructure to deliver wastewater flows to the existing and new IDALs
  • two additional sludge lagoons
  • a new chemical dosing unit (CDU) for pH correction
  • a new pipeline (about 275 metres long) to transport chemicals from the CDU to the Western Dam
  • a new odour control system
  • upgrades to electrical and monitoring control systems
  • improvements to site and road drainage.

Other work to improve the plant:

  • Pilot wetlands: we're building four pilot wetland cells to assess how well they remove nutrients from the treated wastewater. Construction is expected to be completed in March 2019.
  • Denitrification: we're installing new equipment to further reduce nitrogen levels in the treated wastewater and minimise impacts on the environment and waterways. This work is expected to be completed by early 2020.


All construction work will be contained within the property boundaries of Picton Water Recycling Plant and Picton Farm. There will be minimal impacts on the environment and local community during construction and commissioning of the new infrastructure. 

We're investigating ways of improving wastewater management at the plant over the long-term. Along with the pilot wetlands trial, we're:

  • studying opportunities for re-using treated wastewater, for example, to flush toilets or irrigate farms and gardens
  • identifying ways of preventing any additional sources of water entering the wastewater network
  • determining the best ways of managing any excess recycled water released from the plant into local waterways.

The outcomes of these investigations will inform the long-term strategy which is expected to be completed by June 2019.

This will build on our earlier strategies and incorporate feedback from the Community Reference Group in 2015-16. Once completed, the long-term strategy will be submitted to the Environmental Protection Agency for consideration.
 To learn more, call us on 13 20 92.