Effluent and liquid wastes need to be treated and disposed of carefully to manage any risks to human health and environmental contamination.

You can only dispose of effluent and liquid waste on your site if there is no access to sewer and you have a permit. All properties with sewer connections available within 91 metres of the property boundary must connect to the sewer.

If there is no sewer or connection available within 91 metres of your site:
 

• You will need to complete and submit an Application to Construct or Install an Apparatus for the Treatment of Sewage to the City;
• Your application will need to include scale plans and supporting documentation;
• Your application will be assessed by the City's Health Services team, and when required, the WA Department of Health.

Find application forms and further details on the Department of Health's website

You can follow this application process for all types of systems including septic tanks and leach drains, grey water systems, Secondary Treatment Systems (STS which were previously known as Aerobic Treatment Units or ATUs) and wash bay waste water treatment systems.

Fact Sheet - Waste Water Treatment in Areas Where Water Corporation Sewer is Unavailable