Raymond Terrace


Raymond Terrace WWTW

The Raymond Terrace Wastewater Treatment Works (WWTW) serves the communities of Raymond Terrace, Medowie and some parts of Heatherbrae.

It currently treats 7.3 Megalitres per day and can handle wastewater from a population equivalent to 35,000 people.

Treatment Process

The Raymond Terrace WWTW provides secondary treatment of wastewater by the following processes:

  • screening of non biodegradable solids and grit removal
  • odour extraction and control facilities
  • nutrient (nitrogen and phosphorous) removal in an aerated oxidation ditch utilizing aerobic and anaerobic biological processes
  • digestion and dewatering of biosolids for reuse in minesite rehabilitation projects
  • UV disinfection of treated effluent.


Recycling & Reuse

All biosolids produced at the plant are beneficially used for mine site rehabilitation and pasture improvement projects.

Recycled water from the plant is used for grit and screening washing, general washdown around the plant and for grounds irrigation.

The remainder of the treated effluent is discharged to Windeyers Creek via Grahamstown Drain.

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


Raymond Terrace Waste Water Treatment Works (WWTW) was first upgraded in 2000 to a capacity capable of providing service to 24,500 people.

At this time, future upgrades of the plant were also planned for stages 2 and 3, knowing there would be future population growth requiring further upgrades to meet demand for service.

Due to the rapid rate of growth seen since 2000, stages 2 and 3 were combined. The improvement works began in early 2009 and were completed on 30 June 2010, finishing ahead of schedule and on budget at a total cost of $10 million. 

Works consisted of upgrades to existing process units and the construction of new process units.

This upgrade has increased the capacity of the Raymond Terrace WWTW plant to cater for 35,000 people.