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.