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Wastewater Treatment Works
Wastewater treatment works
Wastewater treatment works - arial view
Singleton Wastewater Treatment Plant is located at Whittingham on Army Camp Road just outside of Singleton. The original site was established in 1939 just north of the current site which was established in 1988. The existing sewage catchment comprises of eleven catchment areas across Singleton, each gravitating to its respective pump station. Sewage is delivered directly to the treatment works by four main pumping stations located around Singleton.

The current site comprises of an inlet works, two extended aeration tanks of 10,000 EP capacity each, three sludge lagoons of 7,000 EP capacity each, two 1 day detention catch ponds, and an effluent pond of 9 days detention at ADWF. Sewage delivered to the treatment works flows into a collection chamber (balance tank) and then is distributed equally by two parallel flow measuring flumes channels to the two aeration tanks.

The treatment process being used in the extended aeration tanks is the intermittent decant extended aeration (IDEA) mode of the activated sludge process. There are two phases of operation of this IDEA process:

  • The oxidation or reaction phase where raw sewage is brought into contact with the activated sludge (bacterial sludge) in the presence of oxygen. The function of adding oxygen and mixing are performed by floating mechanical surface aerators.
  • Separation phase (aerators switched off), in which quiescent conditions allow the activated sludge to settle within the tank. This settling period allows clarification of the upper layer of the tank. The clear treated liquid obtained is then discharged during the decanting period via decant mechanisms which are lowered into the clear liquid zone.

Treated effluent from the aeration tank is discharged into the one day detention catch pond. If any sludge is being wash-out from the aeration tank it would settle in the pond. Effluent from the catch pond is then diverted to the 9 days detention effluent pond, after which is finally discharged into whittingham swamps and further to Hunter River.

Excess sludge from the aeration tanks is pumped into the sludge lagoons and is allowed to accumulate before ultimate removal and disposal. Clear water from the top of sludge lagoons returns to the inlet works by gravity / by pumping.

Environmental Protection Authority (EPA) Licence 3088

Council operates the Wastewater Treatment Plant in compliance with Environmental Protection Authority (EPA) Licence 3088. In accordance with Licence 3088, Council has made the following information publicly available.

To view a copy of Council's licence to operate the Wastewater Treatment Plant, visit Environmental Protection Licence 3088.

Effluent quality monitoring data for 2013 to present - Effluent Quality Monitoring Data.

Singleton Sewage Treatment Plant Pollution Incident Response Management Plan (PIRMP) applies to EPA Licence 3088, situated on Army Camp Road, Singleton.

Complaints and overflows

To report a complaint regarding Council's Sewage Treatment Plant (EPL 3088) or to report a sewage overflow please contact:

02 6578 7290 during office hours (8am - 4.30pm)

02 6572 1400 after hours


Singleton Council
PO Box 314 Singleton NSW 2330
Ph: 02 6578 7290