HSE Dust Extraction Regulations: What UK Businesses Must Know

Occupational lung disease kills roughly 12,000 people per year in the UK. That makes it one of the largest causes of work-related death — far exceeding workplace accidents. The Health and Safety Executive treats dust control as an enforcement priority, and the regulations behind it carry real teeth.

If your business generates dust — wood, metal, flour, grain, stone, pharmaceutical, or general manufacturing dust — you need local exhaust ventilation that meets HSE standards. This article sets out what those standards are, what the HSE expects, and what happens when businesses fall short.

Why Dust Control Is an HSE Priority

The HSE's focus on dust isn't new. Work-related lung disease — including occupational asthma, chronic obstructive pulmonary disease (COPD), silicosis, and lung cancer — has been a strategic priority for years. The numbers demand it.

Dust-related diseases develop slowly. A worker exposed to harmful dust concentrations today may not show symptoms for 10 or 20 years. By the time the damage is diagnosed, it's usually irreversible. This long latency period means enforcement has to focus on prevention — controlling exposure now, not treating disease later.

That's where dust extraction regulations come in. They exist to keep airborne contaminant levels below the point at which they cause harm.

The Regulations That Apply

Three pieces of legislation form the framework for dust extraction in UK workplaces.

COSHH 2002

The Control of Substances Hazardous to Health Regulations 2002 are the primary regulations. The key provisions for dust extraction are:

Regulation 6 — requires employers to carry out a risk assessment for all work that may expose employees to hazardous substances, including dust. The assessment must identify what dust is generated, who is exposed, and what controls are needed. See our LEV risk assessment guide for practical steps.
Regulation 7 — requires employers to prevent exposure to hazardous substances, or where prevention isn't reasonably practicable, to adequately control it. For most dust-generating processes, adequate control means providing LEV at source.
Regulation 9 — requires that any LEV provided under Regulation 7 is maintained in efficient working order and thorough examination and testing (TExT) is carried out at least every 14 months. Records must be kept for a minimum of 5 years.

Workplace Exposure Limits (EH40)

EH40 is the HSE's published table of workplace exposure limits (WELs). These are the maximum airborne concentrations of hazardous substances that workers can legally be exposed to, measured as 8-hour time-weighted averages.

For common dusts, the limits are:

Dust type	WEL (8-hour TWA)
Hardwood dust	3 mg/m³
Softwood dust	5 mg/m³
Flour dust (inhalable)	10 mg/m³
General inhalable dust	10 mg/m³
General respirable dust	4 mg/m³

These are legal limits, not safe limits. COSHH requires employers to reduce exposure as far as is reasonably practicable, even if concentrations are already below the WEL. The WEL is the ceiling, not the target.

HSG258

HSG258 is the HSE's technical guidance on controlling airborne contaminants at work. It isn't legislation, but it's the document the HSE uses to judge whether your dust extraction system is adequate. It covers LEV design, commissioning, examination, testing, and maintenance. If you operate LEV, HSG258 is the standard your system is measured against. Our HSG258 explainer breaks down the key chapters.

What HSE Expects From Your Dust Extraction System

The regulations set out duties. HSG258 sets out what meeting those duties looks like in practice.

Capture at source. Dust must be captured where it's generated, before it reaches the worker's breathing zone. A hood or extraction point positioned away from the source — or in the wrong orientation — won't achieve adequate control regardless of how powerful the fan is.

Adequate airflow. The LEV system must generate enough air movement to capture and contain the dust. HSG258 specifies capture velocities for different operations. Too little airflow and dust escapes. Too much can create turbulence that pulls dust into the breathing zone.

Effective transport. Once captured, dust must be carried through ductwork to the air cleaning device without settling. Transport velocities depend on the type and weight of the dust particles. Settled dust in ductwork reduces system performance and can create fire or explosion risks.

Proper filtration. The air cleaning device must remove dust particles effectively before air is either exhausted outside or recirculated. Recirculating systems face stricter requirements — fine respirable dust must not be returned to the workplace.

Ongoing maintenance. An LEV system that worked on installation day but hasn't been maintained is not a compliant system. Regular user checks and maintenance between inspections are expected alongside the formal TExT.

HSE Enforcement: The Dust Kills Campaign

Through its Dust Kills campaign, the HSE has carried out targeted dust-inspection programmes across sectors including woodworking, bakeries, stonemasonry, metal fabrication, and manufacturing. These weren't advisory visits. They were enforcement inspections.

Inspectors check:

Whether LEV is present where dust is generated
Whether the LEV is actually switched on and working during dust-generating activities
Whether a current TExT report exists (within the last 14 months)
Whether maintenance records and user check logs are available
Whether workers have been trained on using the LEV system

Failure leads to enforcement action. That can mean an improvement notice (a legal order to fix the problem within a set timescale), a prohibition notice (stop the work immediately until the problem is resolved), or prosecution. Fines for COSHH breaches can run to tens of thousands of pounds, and individual directors can be held personally liable.

The HSE publishes enforcement notices. They're public records. A notice against your business is visible to customers, suppliers, and competitors.

Practical Steps to Comply

If you're assessing where your business stands, work through these steps.

1. Identify all dust-generating processes. Walk through your workplace and list every activity that produces airborne dust. Include the obvious (cutting, sanding, grinding) and the less obvious (bag-tipping, sweeping, decanting powders).

2. Check your LEV coverage. Every dust-generating process should have extraction at source. If there are gaps, you need to install LEV or find an alternative control that achieves equivalent protection.

3. Verify your TExT is current. Use the LEV testing due date calculator to check each system. If any examination is overdue or approaching the 14-month deadline, book it now.

4. Review your records. Run the record-keeping requirements checker to confirm your documentation meets COSHH requirements. You need 5 years of TExT reports, plus user check and maintenance logs.

5. Establish routine checks. Set up a schedule of user checks — visual inspections, airflow checks, filter condition — carried out by trained staff between formal TExTs.

6. Act on TExT findings. If your last examination report flagged defects or recommendations, check they've been addressed. An outstanding recommendation in your report is evidence that you knew about a problem and didn't fix it.

7. Train your people. Everyone who works with or near LEV systems should understand what the system does, how to use it correctly, and what signs of failure to report.

The Cost of Getting It Wrong

Dust exposure isn't a paperwork issue. It's a health issue with legal consequences. Workers who develop occupational lung disease face years of reduced quality of life, lost earnings, and chronic illness. Employers face enforcement action, civil claims, and reputational damage.

The regulations exist because dust kills people. Compliance protects your workers and your business.

LEVproof is being built to help UK businesses manage LEV compliance — TExT tracking, user checks, maintenance records, and automated reminders in one place. Join the waitlist to get early access.

Sources

Control of Substances Hazardous to Health Regulations 2002 (COSHH) — legislation.gov.uk
HSG258: Controlling airborne contaminants at work — HSE
LEV guidance for employers — HSE
Work-related lung disease — HSE
COSHH main page — HSE

This guide summarises published HSE and government guidance. It does not constitute legal advice. Consult a qualified professional for advice specific to your situation.