Welding Fumes WES Compliance: Meeting Australia's 1 mg/m³ Standard

📋 Part of our complete series: Welding Fumes Assessment Australia: The Complete Guide

Welding Fumes WES Compliance: Meeting Australia’s 1 mg/m³ Standard

On 18 January 2024, Australia’s Workplace Exposure Standard (WES) for welding fume (as manganese) changed from 5 mg/m³ to 1 mg/m³. This reduction represents one of the most significant changes to occupational hygiene standards in a decade, reflecting growing scientific evidence of welding fume neurotoxicity. For PCBUs, safety managers, and HSE professionals across Australia, compliance with the new standard is now a legal obligation under the WHS Act 2011. For more information, see our guide to chemical hazards and workplace exposure standards.

This article provides a practical roadmap for understanding the WES change, its regulatory context, and what compliance means for your workplace.

Why the WES Changed: The Science Behind 1 mg/m³

The WES reduction was driven by two critical scientific developments. First, the International Agency for Research on Cancer (IARC) classified welding fume as Group 1 carcinogenic to humans in 2017—the same category as asbestos. Second, epidemiological evidence from welders in multiple countries demonstrated elevated rates of Parkinson’s disease, cognitive decline, and lung cancer even at exposure levels below the old 5 mg/m³ standard.

Australia’s WES is set by Safe Work Australia and adopted by all state and territory regulators. The 1 mg/m³ standard aligns Australia with leading occupational hygiene practice in Europe, North America, and other developed nations. This change applies to welding fume concentrations measured as manganese (Mn) in respirable dust.

Welding Fumes WES Compliance: Meeting Australia's 1 mg/m³ Standard

Understanding the Compliance Roadmap

Compliance with the new WES is not a single action—it is a systematic process. SafeWork Australia’s Code of Practice: Welding Processes 2021 outlines the expected approach:

Risk Assessment: Identify welding operations, worker groups, and potential exposures. Classify operations as high-risk, medium-risk, or low-risk based on welding process, material, duration, and environment.
Air Monitoring (Exposure Assessment): Measure air concentrations of welding fume at each operation. Compare results to the 1 mg/m³ WES.
Implement Controls: If measured concentrations exceed or approach the WES, implement hierarchy of controls: elimination, substitution, engineering (LEV), administrative, and finally PPE.
Verification: Re-monitor after controls are installed to confirm effectiveness. Establish ongoing monitoring for high-exposure work.
Health Monitoring: For workers in roles where exposure is unavoidable, establish health monitoring programs (spirometry, biological monitoring) as prescribed in WHS Regulations Schedule 14.
Record Keeping: Maintain exposure monitoring records, control records, health monitoring data, and training records for inspection by regulators.

State-by-State Adoption and Compliance Timeline

While the WES change was announced nationally on 18 January 2024, the compliance timeline varies slightly by state:

NSW, ACT, NT: WES change effective 18 January 2024; SafeWork NSW and ACT/NT regulators have issued compliance guidance.
Victoria: VicSafe (WorkSafe Victoria) adopted the new WES; compliance required immediately.
Queensland: DNRME (Department of Natural Resources and Mines Energy) adopted the WES; mining and general industry compliance timelines published.
Western Australia: DMIRS (Department of Mines, Industry Regulation and Safety) adopted the WES; guidance issued for mining and general operations.
South Australia, Tasmania: SafeWork SA and WorkSafe Tasmania confirmed compliance requirements aligned to national standard.

All states expect immediate compliance with exposure control and monitoring. There is no grace period; the 1 mg/m³ standard is in force now.

What Compliance Means: Legal and Practical Requirements

Under the WHS Act, PCBUs have a primary duty of care to ensure the health and safety of workers. For welding fumes, this means:

Conducting a documented risk assessment identifying welding operations and exposure risks.
Monitoring air concentrations using accredited laboratories (NATA-accredited sampling and analysis is expected).
Ensuring exposures do not exceed 1 mg/m³ (8-hour TWA, respirable dust fraction).
Implementing controls proportionate to the risk; engineering controls (LEV) are the primary requirement for high-exposure work.
Providing health monitoring if workers cannot be protected below the WES through controls.
Recording all risk assessments, monitoring data, and control measures.
Training workers on risks and control measures.
Investigating incidents and non-compliance (e.g., unexpectedly high exposure results).

Enforcement Approach: WHS Regulators and Penalties

Safe Work Australia and state WHS regulators are actively enforcing the new WES. Regulators have published inspection priorities and are conducting targeted audits at welding operations, construction sites, manufacturing plants, and shipyards.

If a PCBU fails to comply with WES standards, regulators may issue:

Prohibition Notices: Immediate cessation of non-compliant work.
Improvement Notices: Direction to remedy the breach within a specified timeframe (e.g., 30 days).
Civil Penalties: For bodies corporate, up to $3 million for serious breaches. For individuals, up to $600,000 and/or 5 years imprisonment.
Prosecution: In serious cases, regulators refer cases to the courts.

Beyond regulatory penalties, PCBUs face workers compensation liability if a worker develops welding fume–related illness and exposure records show the PCBU failed to control exposure to the WES. This liability extends to psychological injury and occupational disease claims.

Common Compliance Barriers and Solutions

Many Australian welding operations struggle with compliance. Common challenges include:

Challenge: “We don’t know if we’re compliant—we’ve never measured exposure.”
Solution: Engage a certified occupational hygienist to conduct baseline air monitoring. Most operations will need to monitor at least one operation in each exposure group. Air monitoring is non-negotiable for demonstrating compliance.

Challenge: “LEV is too expensive to install.”
Solution: Start with a phased approach. LEV testing and design can be optimised for cost-effectiveness. Many operations find that portable fume extraction arms or improved ventilation achieve compliance at reasonable cost. Some operations shift to lower-fume processes (e.g., flux-cored arc welding with lower Mn content).

Challenge: “We have transient workers (labour hire, FIFO). How do we manage health monitoring?”
Solution: Establish a health monitoring protocol that captures baseline spirometry and biological monitoring before workers start, and exit monitoring at end of engagement. Use a contracted occupational health provider.

Challenge: “Construction welding is temporary. Do we need to comply?”
Solution: Yes. Any welding work, temporary or permanent, must comply with the WES. For construction, the principal contractor and host PCBU share responsibility. Risk assessment for welding must be documented in the Safe Work Method Statement (SWMS).

Practical Compliance Checklist for PCBUs

Use this checklist to assess your current compliance position:

Compliance Element	Status	Timeline
Risk assessment completed (identifies all welding operations and exposure groups)	☐ Complete / ☐ In Progress / ☐ Not Started	Immediate
Baseline air monitoring conducted (at least one sample per exposure group)	☐ Complete / ☐ In Progress / ☐ Not Started	Immediate
All results reviewed and compared to 1 mg/m³ WES	☐ Complete / ☐ In Progress / ☐ Not Started	Immediate
Control strategy documented (LEV design, process substitution, administrative controls)	☐ Complete / ☐ In Progress / ☐ Not Started	Within 30 days
Engineering controls (LEV) designed and installed where required	☐ Complete / ☐ In Progress / ☐ Not Started	Within 90 days
Post-control monitoring conducted; results confirm < 1 mg/m³	☐ Complete / ☐ In Progress / ☐ Not Started	Within 120 days
Health monitoring program designed (if ongoing exposure > 0.5 mg/m³)	☐ Complete / ☐ In Progress / ☐ Not Started	Within 90 days
Worker training on WES change, exposure risks, and controls completed	☐ Complete / ☐ In Progress / ☐ Not Started	Within 60 days
Annual monitoring schedule established; first monitoring conducted	☐ Complete / ☐ In Progress / ☐ Not Started	Within 120 days
Records system in place (risk assessment, monitoring data, controls, training, health data)	☐ Complete / ☐ In Progress / ☐ Not Started	Immediate

Frequently Asked Questions

Q1: Does the 1 mg/m³ WES apply to all welding, including occasional repair welding?
A: Yes. The WES applies to all welding work—routine, occasional, temporary, or permanent. Even a one-off repair job by a tradesperson who is not primarily a welder must comply with the standard. If exposure cannot be measured (e.g., single short job), controls should assume worst-case exposure and apply appropriate engineering controls (e.g., local extraction arm).

Q2: Is the 1 mg/m³ standard applicable to metal fume from processes other than welding?
A: No. The 1 mg/m³ WES specifically applies to welding fume (as manganese). Other processes (plasma cutting, thermal spraying, grinding) have different WES limits. However, many of these co-occur with welding, and cumulative exposure must be assessed.

Q3: We measured exposure at 0.8 mg/m³—are we compliant?
A: You are currently compliant with the WES (which is 1 mg/m³ as an 8-hour time-weighted average). However, you are close to the standard. Consider whether you should implement further controls to build a margin of safety, particularly if there is variability in conditions or worker practices that might push exposure higher on some days.

Q4: How often must we monitor exposure?
A: At minimum, annual monitoring is expected for operations where exposure is not yet controlled below 0.5 mg/m³. Once controls are in place and exposure is consistently below 0.5 mg/m³, the frequency can be reduced to every 2 years (in consultation with your occupational hygienist). If exposure is reliably below 0.2 mg/m³, monitoring may be conducted every 3 years.

Q5: Can we rely on PPE (respirators) to meet the WES?
A: No. The WES applies to the ambient workplace air, not the air under a respirator. PCBUs must control exposure through engineering and administrative controls first. Respirators are a last resort and must meet Australian Standards AS/NZS 1716. Even with a respirator, air monitoring is still required to demonstrate that controls are adequate.

Q6: What should we do if a retrospective air monitoring result is above the WES?
A: Treat this as a compliance incident. Immediately cease work using that method/equipment until controls are implemented. Conduct health monitoring for workers already exposed (spirometry, biological monitoring). Notify affected workers and document the incident. Implement enhanced controls (process change, LEV upgrade) and re-monitor to confirm compliance within 30 days.

Moving Forward: A Practical Next Step

The transition to 1 mg/m³ WES is a watershed moment for Australian occupational hygiene. It reflects a commitment to protecting welders from serious health harm. PCBUs who move proactively to understand their exposure baseline and implement controls will not only comply with the law but will also demonstrate leadership in workplace health.

{{LINK_CONTACT}}Contact our team{{/LINK_CONTACT}} to discuss your welding fumes compliance roadmap. We provide risk assessment, air monitoring, control design, and verification services to help you achieve and maintain compliance with Australia’s new WES.

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