Workplaces across Australia are preparing for a significant change in how exposure to airborne contaminants is managed.
From 1 December 2026, Safe Work Australia will replace the current Workplace Exposure Standards (WES) with Workplace Exposure Limits (WEL) for airborne contaminants. This change is more than a name update. It introduces revised exposure limits for some substances, adds new chemicals to the list, and reinforces the obligation for businesses to actively monitor and control worker exposure to hazardous airborne contaminants.
For organisations operating in industries such as manufacturing, construction, transport, agriculture, mining, warehousing, food production and facilities management, now is the time to understand what these changes mean and assess whether existing controls remain effective.
What are Workplace Exposure Standards (WES) and Workplace Exposure Limits (WEL)?
Exposure standards, soon to be known as exposure limits, define the maximum airborne concentration of a substance that most workers can be exposed to without harm to their health.
According to Safe Work Australia, workplace exposure standards and limits apply to more than 600 substances and mixtures, including dusts, fumes, vapours, gases and mists that may be generated through workplace processes.
However, exposure limits should not be treated as a measure of a “safe” workplace. Businesses still have a duty to eliminate or minimise exposure so far as is reasonably practicable, regardless of whether an exposure limit exists.
“These are exposure levels that must not be exceeded rather than best practice standards.”
The renaming from WES to WEL is intended to align Australia with international practice and provide greater clarity that the listed concentrations are legal exposure limits, not recommended targets.
Why is the Change Happening?
Australia first adopted the WES framework in 1995, with the last comprehensive review undertaken in 2003. Since then, significant scientific evidence has emerged regarding the health impacts of many airborne contaminants and the concentrations at which harm can occur.
Following a national review, work health and safety ministers agreed to:
- Replace the WES list with the WEL list
- Revise exposure limits for a range of chemicals
- Add new chemicals to the exposure list
- Update advisory notations for certain substances
The result is a more contemporary set of exposure limits that better reflects current scientific understanding of worker health risks.
Why Air Monitoring Matters More Than Ever
One of the biggest challenges with airborne contaminants is that many cannot be easily seen, smelled or detected without specialised monitoring.
Dusts, fumes, gases, vapours and mists generated through everyday work activities can cause serious health consequences ranging from respiratory irritation and occupational asthma through to chronic lung disease and cancer.
Safe Work Australia advises that air monitoring may be required to determine whether exposure levels exceed applicable standards or limits. Similarly, WorkSafe Victoria notes that employers must eliminate or reduce risks associated with hazardous substances and ensure workers are not exposed above the relevant exposure standard.
For many organisations, assumptions about exposure levels are no longer enough.
Without objective monitoring data, it can be difficult to demonstrate compliance, verify the effectiveness of engineering controls, or identify emerging risks before workers are harmed.
How Action OHS Consulting Can Help
At Action OHS Consulting, our occupational hygiene and exposure monitoring services help businesses understand exactly what workers are being exposed to and whether existing controls are effective.
We provide workplace monitoring solutions including:
Dust Monitoring
Dust exposure remains a significant concern across construction, manufacturing, warehousing, mining, agriculture and food production environments. Our monitoring services help identify worker exposure levels and determine whether additional controls may be required to meet current and future exposure requirements.
Noise Monitoring
Noise-induced hearing loss remains one of Australia’s most common occupational illnesses. Our noise assessments measure worker exposure and help organisations understand whether engineering controls, administrative controls or hearing protection programs are required.
Exposure Monitoring and Risk Assessment
Where workplaces generate airborne contaminants such as fumes, vapours, gases or mists, monitoring provides valuable evidence to support compliance decisions and risk management strategies.
Rather than relying on assumptions, organisations can make informed decisions based on real workplace data.
Preparing for the Future
The transition from WES to WEL represents an important shift in Australia’s approach to managing airborne contaminants.
While the regulatory change formally takes effect on 1 December 2026, businesses should not wait until the last minute to assess potential impacts. Exposure monitoring, workplace assessments and proactive risk management can help organisations identify gaps early and avoid compliance challenges later.
Most importantly, these changes reinforce a fundamental WHS principle: exposure limits are not the goal. Protecting workers from harmful airborne contaminants requires ongoing risk management, effective controls and regular review.
If your organisation works with dusts, fumes, gases, vapours or other airborne contaminants, now is the ideal time to review your monitoring program and ensure you’re ready for the next phase of occupational health compliance.
Need assistance preparing for the WEL transition?
Action OHS Consulting provides dust monitoring, noise monitoring, occupational hygiene assessments and practical workplace safety advice to help organisations manage exposure risks and protect their people.
Frequently Asked Questions
1. When do Workplace Exposure Limits (WEL) come into effect?
Australia will transition from Workplace Exposure Standards (WES) to Workplace Exposure Limits (WEL) on 1 December 2026. Businesses must continue complying with the current WES list until 30 November 2026.
2. What is the difference between WES and WEL?
The primary change is that exposure standards are being renamed exposure limits to make clear that the concentrations listed are limits that must not be exceeded. Exposure limits for some chemicals have also been revised and new substances have been added.
3. Reduce Admin and Improve Efficiency
Yes. WorkSafe Victoria has confirmed that Safe Work Australia’s WEL list will replace the current WES list from December 2026.
4. Why is air monitoring important?
Air monitoring helps determine whether workers are being exposed to hazardous airborne contaminants above workplace exposure standards or limits and provides evidence that controls are working effectively.
