If you operate in mining or civil construction in Australia, the regulatory ground beneath silica dust is shifting — and it’s pulling pre-employment medicals into sharper focus. What was once treated as a recruitment formality is now a frontline tool for protecting workers and shielding businesses from serious legal and financial exposure. Recent developments make the case clearer than ever.

The silica reckoning is here

Crystalline silica has been described as this generation’s asbestos, and Australian regulators are treating it accordingly. Since 1 September 2024, the model WHS Regulations have included a dedicated chapter (Chapter 8A) for crystalline silica, applying to any material containing 1% or more respirable crystalline silica (RCS) — which captures a huge slice of mining, quarrying, civil, and construction work. The engineered stone ban is now operational nationwide.

The bigger change is on the horizon. From 1 December 2026, the current Workplace Exposure Standard (WES) will transition to a Workplace Exposure Limit (WEL), reflecting a stronger regulatory framing and enforcement approach. Safe Work Australia has also proposed reducing the national respirable crystalline silica (RCS) limit from 0.05 mg/m³ to 0.025 mg/m³, although this change is still under consideration. Regulators are already signalling that duty holders should design controls to meet the lower benchmark where reasonably practicable. In NSW, employers must notify high-risk silica workers to the Silica Worker Register within 28 days of work commencing

Where pre-employment medicals fit in

This is where the baseline medical becomes essential rather than optional. Health monitoring for silica-exposed workers relies on a starting point — a documented baseline against which future changes in lung function can be measured. In Western Australia, WorkSafe introduced state-specific health surveillance requirements for RCS-exposed workers, including a pre-employment baseline silica medical with spirometry and chest imaging, followed by ongoing surveillance.

Without that baseline, an employer can’t demonstrate when or where a respiratory change occurred — a serious problem if a silicosis claim arises years later. The pre-employment spirometry test isn’t box-ticking; it’s the foundation of the entire health monitoring obligation, and it’s the evidence that protects both the worker’s health record and the employer’s legal position.

What a silica-aware pre-employment medical involves

For dust-exposed roles, a thorough assessment typically includes spirometry (lung function), a baseline chest assessment in line with the relevant jurisdiction’s surveillance requirements, audiometry for noise-exposed roles, and a general fitness-for-duty review. The records must be retained for 30 years — a reflection of how long these diseases can take to develop.

The bottom line

The direction of regulation is unambiguous: tighter exposure limits, stronger enforcement, and more rigorous health monitoring. For mining and civil construction employers, a properly conducted pre-employment medical is no longer just about confirming someone can do the job — it’s the first entry in a worker’s long-term health record and a critical piece of WHS compliance. With the December 2026 changes approaching, the businesses getting their baseline monitoring and pre-employment processes right now are the ones that will be best protected later.

To book a silica assessment online https://ohswa.com.au/booking/

*Sources: Safe Work Australia, model WHS Regulations Chapter 8A; WorkSafe WA respirable crystalline silica health surveillance requirements; SafeWork NSW Silica Worker Register; industry guidance on the December 2026 WEL transition.*