Last updated: September 2026
The three types of solid waste most people mean are municipal, commercial and industrial, and construction and demolition waste: the source-based split used in Australia's national waste reporting. NSW law uses a different, risk-based system instead: six waste classes under the Protection of the Environment Operations Act 1997, which is what actually determines where your rubbish can legally go.
Two different answers, because "type" means two different things
When someone asks for the three types of solid waste, they're usually after one of two different answers. The legal one is about risk: what NSW law says has to happen to a particular waste before it can be disposed of. The statistical one is about source: how much waste Australia actually generates, and where it comes from.
NSW answers the legal question with six classes, not three. National waste reporting answers the statistical question with three source-based streams. Neither answer is wrong, but they're not interchangeable, and it's easy to blend a source-based label like "industrial waste" with a risk-based one like "hazardous waste" as if they describe the same kind of thing. They don't. Hazardous waste is a legal risk class, and material from any of the three source-based streams can end up in it.
NSW's legal classification: six waste classes under the POEO Act
Every waste generator in NSW is responsible for working out which of six legal classes their waste falls into before it can be disposed of. It isn't just a label: waste can only be taken to, and accepted at, a facility that's lawfully authorised to receive that particular classification, so getting it wrong is a compliance problem, not just a paperwork one.
General solid waste (non-putrescible) covers waste that doesn't break down organically: glass, plastic, bricks, concrete, metal, paper and wood, along with building and demolition waste as its own defined category. Most household clean-out and renovation rubbish falls here.
General solid waste (putrescible) covers waste that does break down organically and can rot: food waste, animal waste, manure and household waste containing putrescible organics.
Restricted solid waste sits between general and hazardous. Nothing is automatically classified into it; a waste only becomes restricted solid waste once it's been chemically tested and its contaminant levels fall between the general-waste threshold and the hazardous-waste threshold.
Hazardous waste is triggered two ways: a fixed pre-classified list (lead-acid batteries, coal tar pitch waste, lead paint waste from non-residential sources, and similar), or by testing positive as a dangerous good under the Transport of Dangerous Goods Code, which covers explosives, compressed gases, flammable or spontaneously combustible solids, water-reactive substances, oxidising agents, toxic substances and corrosives. If a generator skips the required chemical assessment for waste that isn't otherwise classified, the waste defaults to hazardous by law.
Liquid waste is defined by how it behaves, not what it's made of: anything with an angle of repose under 5 degrees, that becomes free-flowing at or below 60°C, or that can't be picked up with a spade or shovel.
Special waste is a fixed list regardless of its physical properties: clinical and related waste, asbestos waste, and waste tyres.
The other "three types": municipal, commercial and industrial, and construction and demolition
This is the split behind Australia's national waste statistics, and it groups waste by where it came from rather than by risk. In the most recent full-year national data (2022-23), municipal solid waste (households and local government) made up 13.5 million tonnes, or 18% of the total. The commercial and industrial stream made up 32.9 million tonnes, or 44%. Construction and demolition made up 29.2 million tonnes, or 39%. Businesses and building sites produce far more waste by weight than households do.
The two systems connect at one point worth knowing: construction and demolition waste isn't its own legal class under NSW law. It's defined and pre-classified as a category of general solid waste (non-putrescible), which is why a renovation skip full of bricks, timber and plasterboard is legally treated the same way as general household clean-out waste, even though it's counted separately in the national statistics.
The source-based split is also shifting over time. Over the six years to 2022-23, construction and demolition waste grew 15% per person while commercial and industrial waste fell 9% per person and municipal waste fell 2.8% per person, driven mostly by major development activity.
Where each type actually goes
The legal classification decides the disposal path, and it's a real constraint, not a formality. General solid waste, putrescible or non-putrescible, goes to a facility licensed to accept that class. Hazardous waste can't legally be disposed of in NSW at all without treatment first. Special waste categories like asbestos and clinical waste have their own dedicated handling requirements regardless of volume.
Working out which legal class a load falls into matters for compliance. For most households, the more immediate problem is volume, not classification: general household and renovation waste that's too much for the council bin or a single trip to the tip. See household rubbish removal for a same-day option.
