Hazardous Chemicals & WEL SWMS Templates

Safe Work Australia's revised Workplace Exposure Limits take effect 1 December 2026, replacing the previous Exposure Standards. Significant reductions apply to welding fume (now 1 mg/m³ as a general WEL), respirable crystalline silica, cadmium, hexavalent chromium, formaldehyde and diesel particulate matter. PCBUs must reassess control measures, air monitoring programs and respiratory protection under WHS Regulation 2025 Reg 49 before the deadline. SWMS should document the new WEL value, monitoring frequency and trigger points for escalated controls.

Welding fume work is not automatically HRCW under WHS Regulation 2025 Reg 291 unless conducted in a confined space, at heights over 2 m, or near energised electrical installations. However, welding fume is a Group 1 IARC carcinogen and triggers Reg 347 hazardous chemical duties, requiring documented risk controls. Most principal contractors mandate a SWMS for welding regardless of HRCW classification, and a SWMS is best practice for demonstrating compliance with WEL obligations and the hierarchy of control.

Under WHS Regulation 2025 Reg 368, health surveillance is mandatory when workers are exposed to substances listed in Schedule 14 — including cadmium, chromium (VI), formaldehyde, isocyanates, lead and crystalline silica — and there is a significant risk of disease. The PCBU must engage a registered medical practitioner with occupational health experience, cover all costs, and retain records for 40 years. SWMS in this category document the trigger criteria and surveillance schedule.

The model WHS Regulation 2025 is harmonised across all states and territories except Victoria, which operates under OHS Regulations 2017. Hazardous chemical duties, WEL values and Schedule 14 health surveillance triggers are substantively identical in NSW, Queensland, WA, SA, Tasmania, ACT and the NT. Victorian SWMS must reference equivalent OHS Regulation Part 4.1 provisions. Our templates are state-neutral with annotations where Victorian or WA mining-specific requirements diverge.

A Safety Data Sheet (SDS) is the manufacturer's hazard information document required under WHS Reg 330. A hazardous chemicals register (Reg 346) is the workplace inventory listing every hazardous chemical present with the current SDS. A SWMS is the task-specific risk control document required for HRCW under Reg 299, and is best practice for any chemical exposure work. The three documents are complementary — the SDS informs the SWMS, and both reference entries in the register.