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

What we do with the wastewater

The remaining wastewater is treated using special bacteria that feed on organic matter turning it into carbon dioxide, water, or nitrogen.

Once the bacteria have cleaned the wastewater, the liquid is passed into settlement tanks.

The tanks filter through gravel and reed beds before flowing back into the river.

Turning waste into power

We’re dedicated to protecting our environment and building a greener environment, which is why we use sediment to create fertiliser and generate electricity

Useful guides