Liquid trade waste
Liquid trade waste is any discharge to a sewerage system other than domestic waste from a hand wash basin, shower, bath or toilet.
Sewerage systems are designed to safely collect, transfer and treat wastewater that is mostly of domestic origin. However, sewerage systems may also accept liquid trade waste discharges provided they are planned and controlled within acceptable limits.
Sound regulation and pricing of sewerage and liquid trade waste is a key component of the NSW Best-Practice Management of Water Supply and Sewerage Framework (PDF 160 KB).
Approval to discharge
Businesses or government agencies proposing to discharge liquid trade waste to a council sewer must have prior approval from the council responsible for regulating sewerage and trade waste in that area.
For further information, read the fact sheet Protect our environment by managing your liquid trade waste (PDF 260 KB).
Liquid Trade Waste Regulation Guidelines
To assist local water utilities (LWUs) with best-practice regulation of sewerage and trade waste in non-metropolitan NSW, the NSW Government has issued the Liquid Trade Waste Regulation Guidelines (PDF 3.1 MB).
The Liquid Trade Waste Regulation Guidelines set out the comprehensive NSW framework for the regulation of sewerage and trade waste. The guidelines are driven by the NSW Best-Practice Management of Water Supply and Sewerage Framework and are consistent with the National Wastewater Source Management Guideline, published by the Water Services Association of Australia in July 2008.
The Liquid Trade Waste Regulation Guidelines include Appendix D: Model Policy for Liquid Trade Waste Regulation (PDF 3.1 MB). LWUs are required to adopt and implement a liquid trade waste regulation policy in accordance with this model policy.
For a Word copy of the policy, trade waste application forms, and general conditions of approval, contact Haddie Man on (02) 8281 7380.
The Liquid Trade Waste Regulation Guidelines simplify LWU approval of trade waste dischargers by:
- authorising LWUs to assume concurrence for low risk liquid trade waste dischargers
- encouraging LWUs with significant experience in liquid trade waste regulation to apply for authorisation to assume concurrence for medium risk liquid trade waste dischargers
- simplifying the approval process for liquid trade waste applications made by government agencies.
By following the guidelines, LWUs can:
- meet their due diligence obligations and achieve improved environmental outcomes by complying with the LWU's sewage treatment works licences
- improve sewerage system performance, including reduced frequency of sewer chokes and odour complaints
- simplify and speed up liquid trade waste approval
- provide financial incentives to business and industry for cleaner production and waste minimisation
- provide cost effective liquid trade waste services and achieve full cost recovery for non-residential sewerage and trade waste services, and remove existing cross subsidies
- reduce residential sewerage bills as improved sewerage system performance will free up system capacity and enable the LWU to serve new development and population growth without needing to augment the existing sewerage infrastructure.
The NSW Office of Water develops and updates the Liquid Trade Waste Regulation Guidelines, the Model Trade Waste Regulation Policy and related documents. The Office of Water also provides its concurrence to the LWU approval of high risk and medium risk dischargers, as well as authorising 'assumed concurrence' to suitably qualified LWUs for medium risk discharges and consenting to LWU trade waste policies.
The Office of Water assists LWUs by:
- providing expert advice and technical support on trade waste matters
- providing training courses in regulation of sewerage and trade waste
- representing non-metropolitan NSW on trade waste issues at state and national forums.
For more information, or to discuss any aspect of liquid trade waste, contact an urban water officer.