7 Flour Dust Risks in Food Manufacturing

Flour dust exposure isn't limited to bakeries.

Food manufacturers can create airborne flour dust whenever workers weigh, batch, mix, coat, transfer or clean up flour and flour-containing ingredients.

This risk can affect businesses that produce baked goods, prepared and frozen foods, crumbed meat and poultry products, cereals, premixes, snack foods and other products that use flour or cereal-based powders.

Some dust-generating activities last only a few minutes. That makes them easy to overlook when assessing dust exposure across an eight-hour shift.

Safe Work Australia identifies flour dust as an airborne contaminant that can damage workers' lungs and contribute to health conditions such as occupational asthma. Its manufacturing guidance uses a biscuit factory as a practical example of how businesses can identify where flour dust enters the air and introduce controls to reduce worker exposure.

With Australia's new Workplace Exposure Limits (WELs) commencing on 1 December 2026, food manufacturers should identify where flour dust becomes airborne and determine whether their existing controls effectively protect workers.

Source: Safe Work Australia – How to identify airborne contaminants in manufacturing

Start by investigating these seven tasks.

1. Opening and Tipping Flour and Ingredient Bags

For many food manufacturers, flour dust exposure starts before production begins.

When workers open and manually empty bags of flour, premixes and flour-containing ingredients, they can release dust directly into their breathing zone.

Review your ingredient tipping stations and ask:

• How far do ingredients fall when workers tip them?
• Do workers empty bags quickly?
• Do workers shake bags to remove the remaining product?
• Does local exhaust ventilation capture dust close to its source?
• Could you transfer ingredients through an enclosed or automated system?

A worker may complete an individual task in seconds but repeat it dozens or hundreds of times during a shift.

These repeated activities can contribute significantly to overall dust exposure.

2. Weighing and Batching Ingredients

Ingredient preparation areas can create significant exposure risks, even when they sit away from the main production line.

Workers may manually scoop, weigh and transfer flour, premixes and other powdered ingredients between open containers.

These tasks often place the worker's breathing zone directly above the material.

When you assess the risks of flour dust, inspect the whole production process. Include ingredient rooms, weighing stations and batch preparation areas rather than focusing only on the main processing equipment.

Look at how workers handle the ingredients, how often they perform each task and whether inhalable dust enters their breathing zones.

3. Loading Mixers and Blenders

Food manufacturers use mixing and blending equipment across many production processes.

Workers may add flour and cereal-based ingredients to mixers when producing dough, batters, coatings, prepared foods, premixes and other products.

Loading dry ingredients can generate significant dust, particularly when workers drop ingredients from height into open equipment.

Starting the equipment can also disturb dry ingredients and release dust before the ingredients become incorporated into the product.

Safe Work Australia's biscuit-manufacturing case study demonstrates how a business can reduce this exposure. The business changed the order in which workers mixed ingredients, installed dust extraction around workbenches and mixing machinery, and introduced air-cleaning equipment.

Source: Safe Work Australia – How to identify airborne contaminants in manufacturing

4. Coating, Dusting and Applying Flour

Food manufacturers don't always mix flour into a product. Some operations apply it directly to the product or production surface.

Examples include:

• Breading and coating processes
• Prepared meat and poultry products
• Dough and pastry production
• Frozen and prepared foods
• Dusting production surfaces
• Applying flour to prevent products from sticking
• Manual and automated coating lines

Workers can become exposed to flour dust when they pour flour into coating equipment, transfer it between processes or disperse it during application.

Assess how workers apply the product, how much they use, how frequently they complete the task and whether the process releases airborne flour dust into their breathing zones.

Where possible, control the dust at its source rather than relying solely on personal protective equipment or respiratory protective equipment.

5. Transferring Flour Through Production

Flour dust exposure doesn't stop when a worker empties a bag.

Food manufacturing facilities may move flour, grain and flour dust, and other powdered ingredients through:

• Hoppers
• Conveyors
• Feed systems
• Mixers
• Sieves
• Transfer points
• Filling equipment

Open or poorly sealed equipment can release dust as material moves through production.

Damaged seals, leaks and ineffective extraction can also allow dust to accumulate around machinery.

Visible dust around equipment provides a clear reason to investigate, but don't rely on visibility alone.

Workers may inhale inhalable dust even when they can't see a dust cloud.

6. Emptying Dust Collectors and Cleaning Equipment

Dust extraction systems capture flour dust, but workers still need to remove and dispose of the collected material.

Workers may face exposure when they:

• Empty dust collection bins
• Replace collection bags
• Clean filters
• Maintain extraction systems
• Clean mixers and conveyors
• Remove accumulated product
• Dispose of captured material

These activities may happen less frequently than normal production tasks, so businesses can easily miss them during workplace assessments.

Follow flour dust through the entire production, maintenance and cleaning process.

Ask what happens after the extraction system captures the dust and who handles the collected material.

7. Sweeping and Compressed-Air Cleaning

Cleaning can send settled flour dust straight back into the air.

Flour can accumulate on floors, machinery and production surfaces throughout a shift.

Dry sweeping disturbs that material. Compressed air can disperse it across an even larger area.

Instead of removing the contaminant, these cleaning methods can create additional airborne flour dust that workers may inhale.

Review whether your cleaning procedures capture dust or simply redistribute it.

Depending on the facility and process, businesses may consider suitable industrial vacuum systems, dust extraction or appropriate wet-cleaning methods.

Which Flour Dust Tasks Should You Review First?

Not every task creates the same exposure potential. When you walk through your facility, consider both how much dust a task can release and how close workers are to the source.

This is a practical screening guide only. Actual exposure depends on the process, quantities, duration, controls and workplace conditions. Air monitoring can determine workers' actual exposure.

Where Does Flour Dust Become Airborne?

Safe Work Australia recommends physically inspecting the workplace and consulting workers to identify where airborne contaminants occur.

For food manufacturers, that means looking beyond the obvious production equipment.

What Are the Health Risks of Flour Dust?

Regular exposure to grain and flour dust can affect workers' respiratory health.

Safe Work Australia identifies flour dust as an airborne contaminant that can contribute to conditions including asthma.

Workers who regularly inhale flour dust may also report respiratory symptoms that require further investigation.

Businesses should therefore treat flour dust as a workplace health risk rather than simply a housekeeping issue.

Reducing exposure starts with identifying the source of the dust and controlling it as effectively as possible.

If you're unsure where exposures occur across the site, a Health Risk Assessment can help identify dust and other occupational health hazards before you develop a monitoring program.

How Can Food Manufacturers Control Flour Dust?

Once you identify where workers may encounter flour dust, consider controls in line with the hierarchy of controls. Focus on controlling the contaminant at its source wherever reasonably practicable.

How Much Flour Dust Are Workers Breathing?

A visible cloud of flour dust clearly tells you that you should investigate the task.

But workers don't need to see dust for exposure to occur.

Airborne contaminants can remain present at concentrations that aren't easily visible. A visual inspection therefore cannot tell you how much flour dust workers actually inhale.

That's where personal air monitoring can help.

Personal air monitoring measures contaminants within a worker's breathing zone and can help determine:

• How much airborne contaminant workers encounter
• Which workers or tasks experience greater exposure
• Which processes contribute most to exposure
• Whether existing controls work effectively
• Where the business should prioritise improvements

JTA's occupational hygienists assess workplace exposure and help businesses determine whether their existing controls effectively manage airborne hazards.

Safe Work Australia provides guidance on using air monitoring to measure airborne contaminants within a worker's breathing zone and interpret the results.

Source: Safe Work Australia – Air monitoring

What Is the New Flour Dust Exposure Limit?

Australia will transition from Workplace Exposure Standards (WES) to Workplace Exposure Limits (WELs) on 1 December 2026.

Food manufacturers that handle cereal flour need to prepare for an important change.

The new occupational exposure limit introduces a dedicated Workplace Exposure Limit (WEL) for flour (cereal) dust.

Until 1 December 2026, businesses must continue to comply with the existing Workplace Exposure Standards.

The time weighted average (TWA) represents exposure averaged across the relevant working period. Businesses shouldn't treat the exposure limit as a simple dividing line between a safe and unsafe workplace.

Safe Work Australia emphasises that businesses should eliminate or minimise airborne contaminant risks so far as is reasonably practicable.

Source: Safe Work Australia – Workplace Exposure Limits for Airborne Contaminants

JTA has covered the flour dust regulatory change in more detail:

→ Flour Dust Now Has a Legal Limit for the First Time in Australia

You can also explore how the WEL changes affect other industries:

→ Industries Most Affected by Australia's 2026 Workplace Exposure Limits

For an overview of newly added airborne contaminants:

→ 31 New Chemicals Added to the Workplace Exposure Limits

Don't Look Only at the Bakery

Flour dust isn't just a bakery issue.

If you manage health and safety across a larger food manufacturing operation, workers may encounter flour dust in areas that don't resemble a traditional bakery.

Walk through the complete process:

Look for tasks where workers manually handle flour, drop it from height, transfer it through open equipment or allow it to accumulate on surfaces.

Talk to the workers who perform those tasks.

Ask where they notice dust, which jobs create the most dust and what happens during cleaning, maintenance and production changeovers.

Safe Work Australia's biscuit-manufacturing case study demonstrates this approach. The business identified flour dust clouds and build-up, consulted workers and then changed its processes and controls.

Source: Safe Work Australia – How to identify airborne contaminants in manufacturing

Detect the Exposure. Protect Your People.

Preparing for the new Workplace Exposure Limits doesn't need to start with a complicated compliance exercise.

Start on the production floor.

Follow flour and flour-containing ingredients through your facility. Watch what workers do during ingredient preparation, production, product changeovers, cleaning and maintenance.

Then ask:

Do our existing controls prevent workers from breathing flour dust?

If you don't know the answer, workplace air monitoring can provide the evidence you need to understand the risk and determine your next steps.