Tanilba Bay


The Tanilba Bay Wastewater Treatment Works, commissioned in 1993, serves the communities of:

  • Lemon Tree Passage
  • Mallabula
  • Tanilba Bay

It currently treats 1.27 megalitres per day and can handle wastewater from a population equivalent to 10,000 people.

Treatment Process

The Tanilba Bay WWTW provides secondary treatment of the wastewater through the following processes:

  • screening of solids and grit removal;
  • extended aeration through intermittently decanting aeration tanks for nutrient removal (nitrogen only);
  • UV disinfection of treated effluent;
  • lagooning of biosolids for later dewatering and reuse in minesite rehabilitation projects.


Recycling & Reuse

Effluent from the treatment works is returned to the environment via four sand infiltration ponds located along the eastern boundary of the Tanilba Bay WWTW.

Flows are currently directed to Ponds 1, 2 & 3, which are operated in dry/wet mode and Pond 4 which is retained for wet weather flows.

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