Trying to prepare for a number nobody’s confirmed yet is a frustrating position to be in, and that’s exactly where most NSW businesses sit with the new silica exposure limits right now.
From 1 December 2026, Australia’s Workplace Exposure Standards (WES) for airborne contaminants, including respirable crystalline silica (RCS), are being replaced by Workplace Exposure Limits (WEL).
This guide explains what’s actually changing, what’s still being worked out, and what NSW businesses handling crystalline silica should be doing now to prepare.
What is changing on 1 December 2026?
Is the silica exposure limit itself changing?
Why does the WEL carry more weight than the WES?
How should your business prepare before December 2026?
How does this affect your other silica obligations?
Frequently asked WEL transition questions
Get your business ready for the WEL transition
A summary of the WEL transition for silica
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What is changing on 1 December 2026?
The Workplace Exposure Standard framework is being renamed and strengthened as the Workplace Exposure Limit framework.
According to Safe Work Australia, WHS ministers agreed to the new WEL list and a harmonised transition period ending on 30 November 2026, with the WEL list adopted throughout Australia from 1 December 2026.
The name change itself signals the intent. A ‘standard’ can read as a target to manage exposure around. A ‘limit’ is meant to be read as a line that should never be crossed.
That continues to apply for now, since the current WES list remains the legal benchmark right up until the transition date.
Is the silica exposure limit itself changing?
This is the question most businesses actually want answered, and it’s the one piece of this transition that’s genuinely still up in the air.
Respirable crystalline silica is one of nine substances for which WHS ministers have requested additional impact analysis before their WEL values are finalised, alongside substances such as formaldehyde, benzene and chlorine.
Here’s what’s actually settled, and what isn’t:
- The current workplace exposure standard for RCS,0.05 mg/m³ as an 8-hour time-weighted average, remains in force until 1 December 2026.
- Businesses should not assume the numerical limit will remain the same, nor that it will tighten, since neither outcome has been finalised.
Why does the WEL carry more weight than the WES?
It’s tempting to file this under ‘just a rename’ and move on, but that would be a mistake. A WEL isn’t just a renamed WES.
The rename was a deliberate decision to make clear these are limits that should not be exceeded, rather than guideline values to be managed around, and to align Australia’s terminology with international practice.
In practical terms, this shift matters because:
- Exceeding a WEL is likely to be treated as stronger evidence of inadequate control than exceeding a WES was
- Inspectors and courts may apply more weight to a WEL exceedance when assessing whether a business has met its health and safety duties
- Businesses that have treated their exposure standard as a flexible benchmark will need to adjust that mindset, regardless of where the final silica number lands
This isn’t a future problem either. WES exceedance notifications to SafeWork NSW rose from 50 in the period from September 2024 to 204 across 2025.
Exceedances are already being tracked and reported at an increasing rate, well before the WEL framework and its stronger enforcement weight even take effect.
Here’s a quick reference on how the two frameworks compare:
| Workplace Exposure Standard (WES) | Workplace Exposure Limit (WEL) | |
| In effect | Until 30 November 2026 | From 1 December 2026 |
| Intended to be read as | A benchmark to manage exposure around | A limit that should not be exceeded |
| Silica’s numerical value | 0.05 mg/m³ (8-hour TWA), confirmed | Not yet finalised |
| Enforcement weight | Standard WHS enforcement approach | Designed to carry a stronger enforcement weight |
How should your business prepare before December 2026?
You can’t prepare for a number you don’t have, so don’t try.
Preparing for the WEL transition isn’t about guessing the final silica figure. It’s about making sure your monitoring, controls and documentation are solid enough to respond quickly once that number is confirmed.
Practical steps to take now include:
- Review your most recent air monitoring results against the current 0.05 mg/m³ standard, and flag any results sitting close to that line
- Confirm your silica risk control plan reflects the controls actually in use on site, not just what was documented when the plan was first written
- Make sure any air monitoring is carried out properly, since this requirement isn’t changing with the WEL transition
- Subscribe to Safe Work Australia’s exposure standards updates so you’re notified as soon as the silica WEL value is confirmed, rather than finding out after the fact
What happens when controls fall short
The cost of getting this wrong is already real, even under the current framework. In 2023, an engineered stone provider was fined $375,000 in the District Court after exposing a worker to a risk of serious illness over a six-year-and-ten-month period.
That fine was handed down under the WES, before any of the stronger enforcement weight a WEL carries comes into play. Businesses that still rely on informal or inconsistent dust controls have even less room to maneuver once the transition takes effect.
| “We’ve had businesses tell us they’re not too worried because the number probably won’t change. That’s missing the point. Even if 0.05 stays exactly where it is, the way it gets enforced is about to get a lot less forgiving.” Kate O’Connor, National Program Manager, Munro Respiratory Services |
How does this affect your other silica obligations?
The WEL transition changes the legal framework around exposure limits, but it doesn’t replace any of your existing silica duties. Training, risk control plans, monitoring and worker registration all continue exactly as they are now.
PCBUs carrying out high-risk crystalline silica processing still need to:
- Maintain a current silica risk control plan for high-risk processing tasks
- Provide approved silica awareness training to workers involved in or at risk from that processing
- Register high-risk workers on the Silica Worker Register within 28 days of them starting that work
- Provide health monitoring where there’s a significant risk to a worker’s health
Frequently asked WEL transition questions
Does a WEL exceedance automatically mean a business gets prosecuted?
Not automatically. An exceedance is treated as strong evidence that controls aren’t adequate, but it’s one factor a regulator weighs alongside the broader circumstances, not an automatic trigger for prosecution on its own.
Will my current air monitoring results become invalid once the WEL takes effect?
Monitoring carried out correctly against the current WES remains a valid record of past exposure, but once a new WEL value is confirmed for silica, you may need to assess whether your results would still meet it.
What happens if the silica WEL value still isn’t confirmed by 1 December 2026?
The current workplace exposure standard for RCS continues to apply until a WEL value is confirmed and implemented for that substance. Substances still under review, including silica, don’t simply go unregulated once the transition date passes.
Does NSW need to pass its own laws for the WEL to apply?
Yes. The WEL list needs to be implemented into the WHS laws of the Commonwealth, states and territories, including NSW, before it takes legal effect locally.
Get your business ready for the WEL transition
The businesses that find this transition easiest will be those whose monitoring, training, and control plans were already solid before the deadline.
Munro Respiratory Services helps NSW businesses get ahead of changes like this. We deliver approved silica awareness training and on-site respirator fit testing across NSW, so your team is already working safely, no matter which way the silica limit eventually moves.
