My Supply

About your waste water

Cleaning over 1 billion litres of wastewater a day

Every day we treat 1.4 bilion litres of sewage. We clean it, then safely release the water back into rivers.

The wastewater we treat contains:

  • human waste
  • food
  • detergents
  • oils
  • metal residues
  • sand

Occasionally it can also contain harmful chemicals too.

Where your wastewater goes

It’s our job to remove sewage, treat it and then return the cleaned sewage back into rivers or streams to continue its journey through the water cycle.

Used water from your home enters the public sewer system which then goes into one of the water treatments plans in our region.

At the treatment plants, water is cleaned and filtered to remove anything that’s not liquid. Once filtered, the water passes into large tanks where the water settles, and sediment is removed.


sewage tanks