From 1 December 2026, diesel particulate has a legal limit
0.01 mg/m³ of respirable elemental carbon. The first legally enforceable national limit on diesel particulate in Australia — and a plain reading of what it means for plant working inside.
Guidance becomes a limit
Australia’s workplace exposure standards become legally enforceable workplace exposure limits on 1 December 2026. Two changes matter if you run engines in enclosed spaces:
- Diesel particulate matter gets a limit for the first time — 0.01 mg/m³, measured as respirable elemental carbon. There has not been a binding national number for this before.
- Carbon monoxide tightens from 30 ppm to 20 ppm as an eight-hour time-weighted average.
It is not a mining rule. Safe Work Australia’s own scope names indoor construction, tunnelling, workshops, warehouses, freight depots, agriculture, transport and vehicle maintenance alongside mining and quarrying.
One caveat worth having straight: the limits bite as each jurisdiction implements them into its own WHS laws. Victoria is not a model-WHS state — it runs its own framework under the OHS Act 2004 and its own process — so do not assume the same date applies identically everywhere. Check your own regulator.
Elimination sits at the top, and it names electric
Safe Work Australia’s guide Managing the risks of exposure to diesel engine emissions in the workplace (June 2026) is unusually direct about the order of operations:
“Eliminating sources of DEE is the best option to reduce workers’ exposures.”
“Elimination — Consider if risks from DEE can be eliminated by using alternative power sources, for example by replacing diesel-powered plant with electric, propane, compressed natural gas or petrol-powered plant.”
Filtration, ventilation and monitoring all sit below that in the hierarchy. They are the controls you reach for when the source cannot be removed.
Quoted from Safe Work Australia, Managing the risks of exposure to diesel engine emissions in the workplace, June 2026. Reproduced under CC BY 4.0.
Elimination is easy to say and hard to buy
Plenty has been written about the limit. Almost nothing has been written about the part that actually blocks it: if you take the diesel machine out of the shed or the building, what goes in instead and will it do the work?
Most electric machines in this class are a battery driving a hydraulic pump — the engine was electrified and the rest left alone. They still carry the pump, tank, cooler, oil and every hose that can weep onto a floor, which is a large part of why they are 900 mm wide and will not come through a door.
Hydraulics also throw away a good share of what you feed them as heat, so a machine built that way needs close to twice the battery to do less work. Delete the hydraulic system entirely and the machine gets narrower, quieter and simpler all at once.
Our machines add nothing to the air those limits cover
E-XD machines have no engine, so they produce no exhaust emissions and add nothing to the contaminants the new limits measure. That is the entire claim we will make.
We will not tell you that buying a machine makes you compliant. Whether your site meets a limit depends on your ventilation, your other plant and everything else running in the same space — which is a conversation for your regulator or an occupational hygienist, not for a machinery builder. If you want the honest version of what one of ours will and will not do in your building, ask us and we will tell you.