Trade waste


Any business that lets liquid trade waste into a Council sewer must apply for liquid trade waste approval from us. Use the online form on this page to apply, plus find out more about liquid trade waste categories and charges. 

Trade waste is all liquid waste, generated on a commercial premises, and discharged to our sewerage system. This includes water contaminated with:

  • grease
  • oils
  • solids
  • chemicals.

Trade waste can damage the sewerage system, sewer operators and the environment.

Apply for a trade waste approval

Owners or tenants may apply for approval. Tenants must have written consent from the owner before they apply. 

It is the discharger’s responsibility to:

  • Pre-treat their waste to a level acceptable for discharge to the sewer.
  • Consistently comply with all the conditions in Council’s approval.

Liquid trade waste categories and charges

Fees apply. Liquid trade waste is categorised and charged according to:

  • The type of liquid waste discharged (determined by the business activities).
  • The quantity of liquid waste discharged.
  • The potential risk to the sewerage system, public health and the environment.
  • Pre-treatment requirements. Contact us for information on the type of pre-treatment needed.

Liquid trade waste charges include:

  • Registration fee.
  • Category 1 – applies to dischargers requiring nil or minimal pre-treatment and may include prescribed pre-treatment and low impact to the sewerage system.
  • Category 2 – applies to dischargers with prescribed pre-treatment.
  • Category 2S – applies to dischargers transporting or discharging septic tank or pan content waste to the sewerage system.
  • Category 3 – applies to large dischargers (>20kL/day) and industrial or manufacturing type waste. 

Trade waste issues

Excess grease and fats can increase the load on the sewerage treatment system, cause blockages and increase hydrogen sulphide being produced.

This can cause:

  • overflows of untreated sewage to the environment 
  • bad odours
  • increased maintenance costs
  • corrosion of the sewerage infrastructure.