Improving our wastewater system

We're always upgrading and repairing our wastewater system.

We've also improved wastewater services in many unsewered villages through our Priority Sewerage Program.

Our wastewater projects help protect public health and the environment across Sydney, the Blue Mountains and the Illawarra.

Man in safety vest turning wheel on pipework

We continually check our wastewater assets to keep them in good condition.

Completed wastewater schemes

We've provided improved wastewater services to nearly 11,000 properties in 33 urban villages. These wastewater schemes are part of the NSW Government's Priority Sewerage Program.

The villages serviced include:

  • The Oaks, Oakdale and Belimbla Park
  • Coalcliff, Stanwell Park, Stanwell Tops and Otford
  • Jamberoo
  • Mulgoa, Wallacia and Silverdale
  • Mount Kuring-gai Industrial Estate
  • Brooklyn and Dangar Island
  • Mount Victoria, Blackheath and Medlow Bath
  • Agnes Banks and Londonderry
  • Glossodia, Freemans Reach and Wilberforce
  • Hawkesbury Heights and Yellow Rock
  • Appin
  • Cowan
  • West Hoxton
  • Bargo
  • Buxton
  • Wilton village
  • Douglas Park
  • Galston and Glenorie.

See where these villages are located on our map

Galston and Glenorie Wastewater Scheme

  • Location - Galston and Glenorie
  • Timeframe - The scheme was completed in mid-2015 and eligible properties are now connecting to the new wastewater system.

We've provided improved wastewater services to Galston and Glenorie.

Learn more about the Galston and Glenorie Wastewater Scheme.

We improve the reliability of our wastewater system by repairing or replacing old wastewater pipes. We also install new pipes to increase the system’s capacity.

Network repairs

  • Location - various suburbs across Sydney
  • Timeframe - ongoing

We're repairing small sections of cracked, collapsed or damaged wastewater pipes across our system. About 4,000 jobs are done each year as part of our network repair work.

Learn more about our network repair work.

Sewer and Stormwater Rehabilitation

  • Location - various suburbs across Sydney
  • Timeframe - ongoing

We're upgrading lengths of our wastewater and stormwater pipes. This work will help prevent leaks in pipes for the next 50 years.
Learn more about our sewer and stormwater rehabilitation.

Refresh Vaucluse and Diamond Bay

  • Location - Vaucluse and Diamond Bay
  • Timeframe - work is in progress to investigate options with the help of community and stakeholders  

We’re committed to investigating options to deliver a permanent long term solution to manage the last remaining untreated wastewater ocean outfalls in NSW.

Learn more about Refresh Vaucluse and Diamond Bay.

Woolloomooloo Wastewater and Stormwater Separation Project

  • Location - Woolloomooloo, Darlinghurst and Potts Point
  • Timeframe - finished

To reduce the number of wet weather wastewater overflows to Woolloomooloo Bay and help improve the environment, we've separated the old combined wastewater and stormwater system in Woolloomooloo. We’re continuing to test and monitor the system to ensure it’s working the way we planned, though this is taking longer than expected because we need rain to test the system. We may need to do a bit more work in some areas if we find wastewater is still getting into the stormwater system. We’re expecting to finish this final stage by late June 2020.

Learn more about the Woolloomooloo Wastewater and Stormwater Separation Project.

Workmen in safety gear in front of crane and plastic at night

Lining pipes helps improve the wastewater system.

When the wastewater system is blocked or reaches capacity in heavy wet weather, wastewater can overflow to the local environment or within private properties.

Our work includes removing blockages from pipes and building infrastructure or installing new pipes to store excess wastewater flows when needed. This helps to:

  • stop uncontrolled wastewater overflows
  • protect public health
  • protect the environment.

Internal Surcharge Improvement Program

  • Location - various suburbs across Sydney
  • Timeframe - ongoing 

We're currently in the planning or construction stage for a number of projects that will help fix wastewater surcharges at private properties.

Learn more about our Internal Surcharge Improvement Program.

Wastewater pumping stations move wastewater flows uphill, where gravity is not effective in transporting wastewater through the system.

We build, modify or repair our wastewater pumping stations to help the wastewater system operate efficiently.

Wastewater from homes, businesses and industry is treated to a high level at our wastewater treatment and water recycling plants.

Our wastewater treatment plant improvement program helps to increase the performance and reliability of our plants. This includes minimising odours and expanding the capacity of our treatment plants to service the growing population.

Picton Water Recycling Plant

  • Location - Picton
  • Timeframe - a strategy to expand the Picton Wastewater Scheme will be finalised by the end of 2019. Work to expand the scheme is expected to finished by 2025.
We’re developing a strategy to expand the Picton Wastewater Scheme to service new connections and growth in the area.

Learn more about the Picton Wastewater Scheme and Water Recycling Plant

North Head Wastewater Treatment Plant

  • Location - Manly
  • Timeframe - work to begin in the next six months

Since 2017, we've been working to improve the odour management system at the plant. The next stage will focus on improving the way we treat wastewater and biosolids recycling. This will improve our environmental footprint, as well as reduce odour emissions from trucks transporting the biosolids to farms in regional NSW.

Learn more about the North Head Wastewater Treatment Plant.

Have your say about our projects

Female staff member talking to a man next to a metal fence

Your feedback is important to us.
Visit Sydney Water Talk to learn more about our projects and provide feedback.