The Karuah Wastewater Treatment Works serves the township of Karuah.

It currently treats 0.34 Megalitres per day and can handle wastewater from a population equivalent to 1450 people.

Treatment Process

Karuah Wastewater Treatment Works (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

All biosolids produced at the Karuah Wastewater Treatment Works (WWTW) are beneficially used for mine site rehabilitation.

Recycled water is used for:

  • grit and screening washing
  • general washdown around site
  • grounds irrigation
  • irrigation for a range of fodder crops

The recycled water is reused onsite at Hunter Water’s Kuruah Effluent Reuse Enterprise (KERE), which is adjacent to the Karuah WWTW.

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