Flour. Sugar. Spice blends. The ingredients that smell like your grandmother's kitchen are landing food manufacturers in court with fines north of £120,000. And the companies paying those fines thought they had it covered.

The Enforcement Picture

UK enforcement has sharpened considerably on food sector dust exposure. The Health and Safety Executive has prosecuted manufacturers for flour dust, grain dust, and enzyme exposure where airborne concentrations regularly exceeded occupational exposure limits. The fines are not symbolic. A major baked goods supplier paid £120,000 after workers developed occupational asthma from flour dust. A spice processor was fined £80,000 for failing to monitor airborne pepper and chilli dust. A confectionery manufacturer faced prosecution after staff developed sensitisation to enzyme additives used in flavour production.

The pattern across these cases is consistent. Dust controls existed on paper. Extraction systems existed in theory. What was missing was any serious verification that they actually worked, combined with a cultural assumption that food dust could not be as dangerous as, say, silica on a building site. That assumption is wrong, and it is costing people their lungs.

Why Food Manufacturers Underestimate the Risk

Construction gets the dust headlines. Silica dust awareness has finally broken through in that sector after decades of effort. Food manufacturing has no equivalent cultural moment yet. The hazards feel softer because the materials feel familiar. Nobody is frightened of flour.

They should be. Flour dust is a respiratory sensitiser. Once a worker develops sensitisation, even tiny exposures trigger asthma attacks. There is no threshold below which exposure is safe for a sensitised person. The disease is permanent. The damage does not reverse when they leave the job.

The legal framework is the same as any other inhalation hazard. The Control of Substances Hazardous to Health Regulations require manufacturers to assess exposure, implement adequate controls, verify those controls work through air monitoring, and provide health surveillance. None of that is optional. Choosing not to do it is not a grey area.

The High-Risk Ingredients List

Not all food dust is equal. These are the ingredients that generate the most significant occupational health risk.

Flour and grain dust. The Workplace Exposure Limit for flour dust is 10 mg/m³ (total inhalable) and 4 mg/m³ (respirable). Bread, biscuit, and pasta manufacturers routinely breach these limits without knowing it because nobody has measured. Sensitisation leads to occupational asthma. Grain dust at higher concentrations also carries explosion risk.

Enzyme additives. Used in baking, brewing, and dairy processing. Enzymes are potent sensitisers at very low concentrations. Some workers develop asthma after just months of exposure. The WEL is poorly understood in many facilities because the substances are bought in formulated blends and the individual components are not always identified.

Spices and flavouring powders. Chilli, pepper, cinnamon, and paprika dust causes both sensitisation and direct irritant effects. Upper respiratory irritation is common. Workers often normalise runny eyes and sneezing as part of the job. They are not a normal part of the job.

Sugar and starch dust. Lower sensitisation risk than flour, but significant explosion hazard at concentrations above 60 g/m³. Several food facilities have had dust fires and explosions because the housekeeping programme addressed floors but ignored ledges, ducting, and overhead equipment.

Lactose and dairy powders. Relevant in infant formula, supplement, and dairy processing environments. High-care production areas often have intensive powder handling with inadequate local exhaust ventilation because the cleanroom focus is biological contamination rather than airborne dust.

Cocoa and coffee dust. Both are respiratory sensitisers. Coffee dust in particular is associated with occupational rhinitis and asthma in processing environments.

What an Adequate Control Audit Looks Like

If you have not done a structured review of your dust controls recently, assume there are gaps. Here is what the audit needs to cover.

Identify every dust-generating task. Bulk bag emptying, sieving, weighing, blending, conveyor transfers, and packaging are the primary sources. Walk each line and watch what becomes airborne. If you can see it, it is already too high.

Review your local exhaust ventilation. LEV systems require thorough examination every 14 months under COSHH. Check when the last examination was done and what the report said. Check whether recommendations from previous examinations were acted on. Many systems degrade between examinations because filters are not changed, hoods are repositioned, or airflow is reduced when the system is extended.

Check your air monitoring data. If you have none, that is your answer. Baseline personal air sampling is needed for any role with regular dust exposure. Results need to be compared to the relevant WEL, not just noted and filed.

Review health surveillance records. Workers in flour, enzyme, spice, and grain environments need regular respiratory health surveillance. This means a questionnaire and spirometry programme, not just a pre-employment medical. If occupational asthma is developing, early detection changes outcomes dramatically. Late detection means a worker has already been permanently harmed.

Assess your cleaning regime. Dry sweeping in a food environment is generating secondary dust. High-pressure airline cleaning disperses settled dust into breathing zones. Industrial vacuum systems with HEPA filtration are the correct tool. If your site uses neither, that needs to change.

Check RPE is fit tested and actually worn. Respiratory protective equipment is a last resort, not a primary control. But where it is specified, it needs to be the correct grade, individually fit tested, and actually in use. Disposable FFP2 masks stored in lockers do nothing. Occupational asthma is entirely preventable when controls are applied properly and early.

The Turn

The food industry is not uniquely negligent. It is operating under an assumption that dust hazards are a construction problem, and that assumption has never been correct. The enforcement record now demonstrates that regulators see food manufacturing the same way they see any other high-dust environment. The ingredients smell better, but the lung damage is identical.

Do the air monitoring. Run the health surveillance. Examine the LEV. The fines are large enough to notice. The disease is permanent enough that the fines are the lesser concern.