What is Liquid Trade Waste?
Liquid trade waste is defined in the Local Government (General) Regulation 2005 as all liquid waste other than sewage of a domestic nature. A liquid trade waste fact sheet can be downloaded here:

Fact Sheet - Liquid Trade Waste Fact Sheet - Liquid Trade Waste (204 KB)

Liquid trade waste discharges to the sewerage system include liquid wastes from:

  • business/commercial premises (eg. beautician, florist, hairdresser, hotel, motel, restaurant, butcher, service station, supermarket,dentist);
  • community/public premises (including craft club, school, college, university, hospital and nursing home);
  • industrial premises;
  • trade activities (eg. mobile carpet cleaner);
  • any commercial activities carried out at a residential premises;
  • saleyards, racecourses and from stables and kennels that are not associated with domestic households; and
  • septic tank waste, chemical toilet waste, waste from marine pump-out facilities and established sites for the discharge of pan content from mobile homes/caravans to the sewerage system.

Liquid trade waste excludes:

  • Toilet, hand wash basin*, shower and bath wastes derived from all the premises and activities mentioned above;
  • wastewater from residential toilets, kitchens, bathrooms or laundries ie. (domestic sewage); and
  • common use (non-residential) kitchen and laundry facilities in a caravan park; and swimming pool backwash under 55,000L.

Liquid Trade Waste Charging Categories and Concurrence Classifications

Category 1- dischargers requiring minimal pre-treatment, or prescribed pre-treatment with low impact on the sewerage system

Category 2 - dischargers with prescribed pre-treatment1

Category 2S - septic tank, pan and ship-to-shore waste

Category 3 - large (>20kL/d) and industrial dischargers.

Four (4) classifications of liquid trade waste have been established for approval purposes: Concurrence Classifications A, B, C and S. These classifications are based on the level of risk, ie. low risk, medium risk and high risk liquid trade waste (A, B and C respectively) and septic tank and pan waste (S).

Concurrence Classification A liquid trade waste has 'automatic assumed concurrence'. This means that for waste in this classification Young Shire Council has been authorised to assume concurrence.
Concurrence Classification B liquid trade waste has 'assumed concurrence available'. For waste in this classification, Young Shire Council has been authorised by the Department of Primary Industries (DPI) to assume concurrence.
Concurrence Classification C liquid trade waste requires 'mandatory concurrence', meaning that for waste
Concurrence Classification S for acceptance of septic tank and pan waste. For waste in this classification Young Shire Council has been granted assumed concurrence.

Trade Waste for new business

If you considering starting up a new business or even purchasing an existing one there are some important issues you need to consider regarding the discharge to sewer from the premises.

  1. Regardless of the size or type of business, liquid waste produced by the business that is discharged to sewer and does not come from a shower, toilet or hand wash basing is called trade waste.
  2. Trade Waste produced by a business will always need some form of treatment before discharged to sewer. Examples of required treatment include: a grease trap with a minimum capacity of 1000litres for treating washing up water from takeaways; or a vertical gravity separator for treating liquid trade waste from an automotive repairer.
  3. If your business does not have the correct size or type of treatment device you may be ordered to install/upgrade the correct device or cease discharging to sewer.
  4. Approval from Council is required before any trade waste is discharged to sewer. If you are discharging waste to sewer without approval you are guilty of an offence for which a penalty fee will apply.
  5. Approval to discharge trade waste to sewer does not transfer automatically from one business owner to the next. If you are planning on purchasing an existing business, it is up to you to ensure that you obtain approval to discharge trade waste to the sewer.

Any enquires should be directed to the trade waste officer on 02 6380 1200.

Fees and Charges

Fees and charges for liquid trade waste are updated annually in Council’s Delivery and Operational Plan. The table below identifies what charges are applicable to the various charging categories.


Pre-treatment Products Guide
Pre-treatment products that have been authorised by Sydney Water are accepted by both DPI and Young Shire Council. For more information on pre-approved products visit the Sydney Water website.

Liquid Trade Waste Regulation Policy
Council’s Policy can be found on the policy register.

Liquid Trade Waste Application Forms
Application to Discharge in Councils Sewer can be found here