Trade waste industry guidelines, policy and legislation


Some businesses may require a trade waste meter to measure trade waste discharge quantities. This will be outlined in each Trade Waste Permit.

A trade waste meter is a meter installed to measure the volume of trade waste discharge to the sewer and may be:

  • a water meter which measures the potable water entering the trade waste generating area or
  • a wastewater meter which measures the volume of trade waste discharged to the sewer.

Trade waste meters should meet the Queensland Plumbing and Wastewater Code and WSA 15-2014 Trade Waste Metering Code of Practice and be placed in a location that is accessible and does not poses a risk to the person reading the meter.

Trade waste meters are not required for all business. If a trade waste meter is required, details of the meter installation and maintenance requirements will be a condition of the Trade Waste Discharge Permit issued for the business.


Grease arrestor loadings

Grease arrestor loadings are calculated using the grease arrestor sizing guidelines (PDF 46KB).

Find out more about trade waste pre-treatment facilities installation requirements via a trade waste pre-treatment facilities installation requirements fact sheet (PDF 374KB)

The cleaning frequency of these pre-treatment facilities will be specified in the Trade Waste Approval.

Please note: The cleaning contractor must supply a service record for each service carried out to Unitywater's Trade Waste team. This information must be in a format acceptable to Unitywater, preferably digital.

We have introduced a streamlined Trade Waste Policy (PDF 92KB) to ensure we comply with current state legislation and have a consistent approach to trade waste management across the Moreton Bay, Sunshine Coast and Noosa regions which incorporates National Best Practice Principles from the WSA Guidelines.

We are also committed to minimising the environmental impact of trade waste and providing a greater emphasis on user-pays.


The following requirements apply to Unitywater’s Trade Waste Policy:

  1. All permits and agreements are issued directly to the business owner.
  2. Trade waste business owners will be responsible for trade waste discharge under the conditions set out in the permit, fees and charges.
  3. There will be three standardised categories of trade waste customers: high risk, medium risk and low risk depending on the level of risk associated with the waste.

Unitywater has also developed a Trade Waste Management Plan (PDF 596KB) which outlines the day-to-day management of trade waste discharges to the sewer.

Trade waste approvals are issued in accordance with the Water Supply (Safety and Reliability) Act 2008 refer Part 6 sections 180 to 186.

It is an offence to discharge trade waste to the sewer without an approval (deemed, permit or agreement) refer to Part 7 Sections 193 of the Act.

The Act specifies that the service provider (Unitywater) must consider certain things when assessing applications to discharge trade waste to the sewer refer Part 6 sections 180.


Relevant Legislation:

 Also refer to Unitywater’s Trade Waste Policy (PDF 92KB)