These substances are prohibited from being discharged into all sewers in NSW for the protection of the sewerage system, safety of workers and the environment in each community.
For businesses, these prohibited substances are listed in the Liquid Trade Waste Regulation Guidelines and/or the Liquid Trade Waste Approval for each business.
1. Organochlorine weedicides, fungicides, pesticides, herbicides and substances of a similar nature and/or wastes arising from the preparation of these substances
2. Organophosphorous pesticides and/waste arising from the preparation of these substances
3. Per- and poly-fluoroalkyl substances (PFAS)
4. Any substances liable to produce noxious or poisonous vapours in the sewerage system
5. Organic solvents and mineral oil*
6. Any flammable or explosive substances*
7. Discharges from 'Bulk Fuel Depots'
8. Discharges from chemicals and/or oil storage areas
9. Natural or synthetic resins, plastic monomers, synthetic adhesives, rubber and plastic emulsions
10. Roof, rain, surface, seepage or ground water, unless specifically permitted (clause 137A of the Local Government (General) Regulation 2005)
11. Solid matter*
12. Disposable products including wet wipes, cleaning wipes, colostomy bags, cat litter and any other products marketed as flushable
13. Any substance assessed as not suitable to be discharged into the sewerage system
14. Waste liquids that contain pollutants at concentrations which inhibit the sewage treatment process - refer Australian Sewage Quality Management Guidelines (June, 2012 - WSAA)
15. Any other substances listed in Schedule 5 of Protection of the Environment Operations (General) Regulations 2009 or any other relevant legislation.
* Above the approved limit