What is an aerobic system?

Aerobic treatment units (ATUs) are self-contained electrical wastewater (sewage) treatment systems.

They are used on properties that cannot be connected to the sewerage main.

They are designed to receive and treat all household wastewater from the:

• toilet
• bathroom
• kitchen

There are several ATU designs approved for use in single houses in Western Australia.

They can also be scaled up in size and used in multi-residential and non-residential developments.

Larger systems require individual assessment and approval of their technical design.

In other states, ATUs are referred to as aerated wastewater treatment systems (AWTS).