Paxton WWTW

The Paxton Wastewater Treatment Works (WWTW) services the townships of Paxton, Ellalong and Millfield.

It currently treats 430 kilolitres per day and can handle wastewater from a population equivalent to 3,200 people.

Treatment Process

The Paxton WWTW provides tertiary treatment of wastewater using a membrane bioreactor (MBR) process, which is designed to remove nutrients (nitrogen and phosphorous) and provide some disinfection.

Treatment process:

  • Mechanical screening
  • Membrane bioreactor
  • Catch pond
  • An aerobic digester
  • Two sludge lagoons
  • Chemical dosing
  • Effluent-irrigated tree plantation


Recycling & Reuse

Up to 150 kilolitres per day of recycled water from the Paxton WWTW is used to irrigate the onsite plantation during summer days. During the winter months less recycled water can be re-used to irrigate the onsite plantation due to a higher rainfall. 

Unused treated effluent is released to Congewai Creek.

The sludge lagoons are typically dewatered every four years and the biosolids produced are beneficially used for mine site rehabilitation or agricultural pasture improvement.

Hunter Water recycles approximately 5091 Megalitres per year. Learn more about our recycling and reuse initiatives.