Discharge of portable toilet waste

Everything you need to know about responsibly disposing of portable toilet waste in your business.

Portable toilet waste is waste from domestic and international aircraft, trains, marine craft, ferries, building site toilets and passenger road coaches.

Portable toilet waste has an organic content many times that of normal domestic wastewater, and may contain various treatment chemicals. So, it's discharge to the wastewater system in commercial quantities must be controlled through our industrial waste permitting system.


All portable toilet waste that is being discharged to the wastewater system must be disposed of at designated bulk discharge points.

An application to discharge industrial waste must be submitted and assessed prior to the installation of any proposed discharge point.

All designated discharge points must have a permit held by the party that owns, operates and provides the facility.

This installation is deemed to be a high hazard for backflow prevention within the property, therefore a boundary containment device must comply with our backflow prevention policy.

Read about backflow prevention

Typical drawings

We've developed drawings for marine facilities and all other installations of standard industrial waste apparatus, such as pre-treatment fixtures, plumbing configurations and sampling points.

Marine sullage units

Receiving point for chemical toilet waste

Accepting waste from third parties

Marinas and any other facility wishing to accept this waste from their clients must apply for a trade waste permit. 

Apply online for a trade waste permit

Accepting waste from tankered effluent contractors is not permitted.

Supporting information

Information on the quality and quantity of waste must accompany all applications, particularly added chemical formulations and their relevant Material Safety Data Sheets (MSDSs).

Due to the variability in the chemical composition of the waste, the flow characteristics of the receiving wastewater system and the size of the wastewater treatment plant, each application will be assessed on a site-specific basis,.

Considerations for applications include:

  • the potential for gas production in wastewater systems having high detention times
  • the biodegradability of the waste components
  • the potential for treatment plant process inhibition
  • the effect on the downstream pump station, in relation to its hydraulic capacity and the potential for odour.

Pre-treatment and monitoring requirements

In most cases, provided adequate dilution with normal domestic wastewater is achieved through installation of a holding tank, no further pre-treatment is necessary before discharging to the wastewater system.

An industrial waste sampling point is usually required for all dischargers. Larger volume dischargers may also need to install an industrial waste flow meter. 

Read about flow metering

Read about trade waste monitoring points

More information

Looking for information about discharge from portable toilet waste from caravan parks, roadside stops, showgrounds or other locations?

Read about mobile home and portable toilet waste disposal

Email us at: tradewaste@watercorporation.com.au


Call us on:

13 13 95