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Illawarra and Woronora Water Treatment Plants - Ensuring high quality drinking water


Veolia partnered with Sydney Water in the early nineties, for the building and operations of the Illawarra and Woronora Water Treatment Plants. In 2015, the partnership was renewed with a 15 year contract extension.

Illawarra and Woronora Water Treatment Plants

THE CHALLENGE

Water is used for a variety of purposes – drinking, leisure, cleaning and industrial; therefore it is imperative that we deliver safe, reliable and high quality drinking water as it is crucial for our local communities to function effectively.

In the early 1990s, Sydney Water needed to improve the quality of Sydney’s drinking water to meet the more stringent standards for drinking water introduced by the National Health and Medical Research Council.
 

THE SOLUTION

In 1994 Veolia partnered with Sydney Water, for the building and operations of the Illawarra and Woronora Water Treatment Plants. These facilities have been providing high quality drinking water to more than 500,000 people since the mid-1990s; and have a combined production capacity of 370 million litres per day.

The Illawarra and Woronora Water Treatment Plants have achieved ISO health, safety, environment and quality certifications. Veolia is now responsible for operating and maintaining both plants on behalf of Sydney Water.

The Woronora Water Treatment Plant was constructed at Woronora Dam to filter water supplied from the Woronora Reservoir. This plant was designed with a maximum capacity of 160 megalitres per day; however the daily production rate varies due to a range of external factors affecting water demand.

The Illawarra Water Treatment Plant was constructed to treat water from the Avon Dam, producing up to 210 megalitres per day. A hydro-electric facility enables this plant to be entirely self-sufficient, exporting renewable energy back to the grid.

These two plants operate using similar technical treatment processes, with a flocculation stage and direct filtration on dual media filter blocks (sand and anthracite). The treatment is completed by oxidation of iron and manganese, pH correction by lime and carbon dioxide, disinfection using chlorination and fluoridation to comply with health regulations.
 

THE RESULT

  • Safe, reliable, high quality drinking water supplied to a population of up to 500,000
  • A well established and long term partnership
  • A high level of level of contractual compliance
  • Co-operation with client Sydney Water on successful research and innovation projects.
     

KEY FIGURE

  • High quality drinking water to more than 500,000
  • Woronora Water Treatment Plant has a maximum capacity of 160 megalitres
  • Illawarra Water Treatment Plant can produce up to 210 megalitres per day.

 

Doug Dean AM
Managing Director, Veolia Australia and New Zealand:
"This long-term partnership with Sydney Water is a testament to the high level of operational performance Veolia has been able to achieve. By integrating our best-practice solutions, we have been able to deliver sustainable outcomes which protect the environment, while delivering efficiency and value to Sydney Water.”