HSE’s updated model attributes about 600 annual cancer deaths in Great Britain to occupational diesel exhaust exposure, averaged over 2020–2024. These are estimates of harm from past exposure, not individually certified diesel deaths.
Diesel engine exhaust is an occupational carcinogen. Great Britain has no single workplace exposure limit for the exhaust mixture, although some components have limits. This guide distinguishes updated HSE cancer burden estimates, historical construction evidence and current exposure-control guidance, with the geography and period shown for each measure.
Key facts and figures
- 600 estimated annual cancer deaths attributable to diesel engine exhaust in Great Britain, average 2020–2024.
- 540 lung cancer deaths and 60 bladder cancer deaths a year in HSE’s updated model, average 2020–2024.
- 3rd among the listed occupational contributors to modelled lung cancer deaths, after asbestos and silica, in HSE’s updated table.
- 910 estimated annual cancer registrations attributable to diesel exhaust, average 2018–2022, Great Britain.
- Group 1 — IARC classified diesel engine exhaust as “carcinogenic to humans” on 12 June 2012, upgraded from “probably carcinogenic” (Group 2A, 1988).
- No single WEL for diesel exhaust as a whole in Great Britain; COSHH still requires prevention or adequate control.
- 0.05 mg/m³ is the EU elemental-carbon limit; the general transition ended in February 2023 and the mining/tunnelling transition in February 2026.
- 2012 — IARC classified diesel engine exhaust as carcinogenic to humans; this hazard classification is distinct from an exposure limit.
Checked on 15 October 2026. HSE’s updated tables apply historical attributable fractions to more recent cancer statistics: deaths averaged over 2020–2024 and registrations over 2018–2022. They do not measure current workforce exposure.
How many people die from diesel exhaust exposure at work in the UK?
HSE’s updated CAN02 table estimates 600 annual cancer deaths attributable to occupational diesel engine exhaust in Great Britain, averaged over 2020–2024: 540 lung cancer deaths and 60 bladder cancer deaths. The corresponding CAN03 estimate is 910 cancer registrations a year, averaged over 2018–2022. These rounded modelled figures replace the older headline of about 650 deaths.
The model applies attributable fractions derived from earlier occupational cancer research to more recent cancer statistics. It is not a count of death certificates naming diesel exhaust and does not measure the effect of today’s engines or controls. Long latency means the estimates chiefly reflect past exposure; rounded category values may not sum exactly.
How big is diesel exhaust’s share of occupational lung cancer?
In HSE’s updated table, diesel exhaust accounts for an estimated 540 of 4,800 occupationally attributable lung cancer deaths a year, about 11%. The table ranks diesel after asbestos and silica among the listed agents. The older 1.84% attributable fraction referred to all lung cancer in the historical study, not to the occupational lung cancer total.
Across all occupational carcinogens in the updated HSE model, estimated annual deaths total 8,410 for 2020–2024 and annual registrations total 20,300 for 2018–2022. These include several cancer sites and are not totals for diesel exhaust or for COSHH-controlled chemicals alone. The registration estimate is affected by changes in recorded non-melanoma skin cancer.
Diesel exhaust statistics at a glance
The table below summarises the headline UK measures and where each one currently stands.
| Measure | Latest figure | Period / source |
|---|---|---|
| Annual cancer deaths attributed to occupational diesel exhaust, GB | 600 | Average 2020–2024, HSE model |
| Of which occupational lung cancer deaths | 540 | Average 2020–2024, HSE model |
| Of which bladder cancer deaths | 60 | Average 2020–2024, HSE model |
| Share of modelled occupational lung cancer deaths | About 11% (540 of 4,800) | Average 2020–2024, calculated |
| Rank among occupational lung-cancer contributors | 3rd (after asbestos, silica) | HSE updated CAN02 table |
| Construction workers dying early from past diesel exposure | 200+ (2005) | HSE Cancer and construction |
| IARC carcinogen classification | Group 1 (“carcinogenic to humans”) | 12 June 2012 |
| GB workplace exposure limit (WEL) | None | GB: prevent or adequately control exposure |
| EU binding exposure limit (elemental carbon) | 0.05 mg/m³ | 2023 generally; 2026 for mining/tunnelling |
Which workers are most exposed to diesel engine exhaust?
HSE’s historical construction estimate attributed more than 200 premature deaths in 2005 to past diesel-exhaust exposure. The same older burden research attributed over 40% of occupational cancer deaths and registrations to construction exposures overall. These are dated model results, not current annual counts for construction workers.
Potentially exposed workers include drivers, miners, plant operators, railway and dock workers, vehicle mechanics and people working near engines. Actual exposure depends on emissions, proximity, duration, enclosure and ventilation; a job title alone does not establish a ranking. Assess exhaust generated by work even though it does not arrive with a supplier safety data sheet.
Is diesel exhaust actually a carcinogen?
Yes. IARC classified diesel engine exhaust as a Group 1 carcinogen — its highest category, “carcinogenic to humans” — on 12 June 2012, upgrading it from Group 2A (“probably carcinogenic to humans,” where it had sat since 1988). The reclassification followed accumulating epidemiological evidence, most notably long-running studies of diesel-exposed workers. IARC found sufficient evidence that diesel exhaust causes lung cancer in humans, and a positive but more limited association with bladder cancer.
IARC’s assessment draws on occupational studies, including workers exposed in mining and transport. The Industrial Injuries Advisory Council reviewed the lung and bladder cancer evidence in a 2015 information note. Short-term exhaust exposure can also irritate the eyes and airways. These hazards justify controlling the mixture even where no single exposure limit applies.
Is there a workplace exposure limit for diesel exhaust in the UK?
Great Britain has no single WEL for diesel exhaust as a whole, although components such as carbon monoxide and nitrogen dioxide have limits. COSHH requires prevention or adequate control of exposure. Consider replacing diesel equipment where practicable, keeping exhaust outside occupied spaces, maintaining engines and using appropriate exhaust extraction and ventilation. Compliance cannot be established from one component measurement alone.
Directive (EU) 2019/130 introduced a limit of 0.05 mg/m³ measured as elemental carbon. Its transitional deadline was 21 February 2023 generally and 21 February 2026 for underground mining and tunnel construction. This is an EU requirement, not a Great Britain WEL. Use the applicable jurisdiction’s rules and current risk assessment when specifying controls.
Frequently asked questions
How many people die from diesel exhaust exposure at work in the UK each year?
HSE’s updated model estimates 600 annual cancer deaths attributable to occupational diesel exhaust in Great Britain, averaged over 2020–2024: 540 lung and 60 bladder cancer deaths. It uses historical attributable fractions with newer mortality statistics; it is not a count of certified diesel deaths.
Is there a workplace exposure limit for diesel engine exhaust in the UK?
Great Britain has no single WEL for diesel exhaust as a whole, although some components have limits. Employers must prevent or adequately control exposure under COSHH. The EU’s separate elemental-carbon limit is 0.05 mg/m³, with transition periods ending in 2023 generally and 2026 for underground mining and tunnelling.
Which workers are most exposed to diesel engine exhaust emissions?
Drivers, miners, plant operators, mechanics and people working near engines can be exposed. Enclosure, ventilation, engine emissions, duration and proximity determine exposure; these occupations are examples, not a verified current ranking.
Is diesel exhaust actually a carcinogen?
Yes. IARC classified diesel engine exhaust as carcinogenic to humans in 2012, based on sufficient evidence for lung cancer and a positive association with bladder cancer. HSE’s updated model places diesel third among its listed occupational contributors to lung cancer deaths, after asbestos and silica.
What is DEEE?
DEEE means diesel engine exhaust emissions: a mixture of gases and particles from diesel combustion. IARC classifies diesel engine exhaust as carcinogenic to humans. Assess the whole mixture and its relevant components rather than assuming that particulate measurement captures every hazard.
Related guides
- COSHH Statistics UK: Hazardous Substances at Work
- Silica Dust Statistics UK: Exposure, Silicosis & Deaths
- Occupational Dermatitis Statistics UK: Work-Related Skin Disease
- How to Carry Out a COSHH Risk Assessment
- The COSHH Hierarchy of Control: How to Choose Controls in the Right Order
Sources & references
- HSE CAN02: estimated annual cancer deaths, average 2020–2024
- HSE CAN03: estimated annual cancer registrations, average 2018–2022
- HSE CAN01A: cancer burden model and methodological notes
- HSE: diesel exhaust in construction, historical burden and controls
- HSE: construction cancer burden, historical study
- HSE HSG187: diesel exhaust controls; older guidance
- HSE EH40: current workplace exposure limits
- IARC: diesel exhaust classification, June 2012
- European Union: Directive 2019/130 and diesel exhaust limit
- IIAC: diesel exhaust and lung/bladder cancer, 2015
Diesel engine exhaust is a COSHH carcinogen with no exposure limit to hide behind — make sure your team can recognise the risk and apply the right controls.
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Mark writes about workplace health & safety, COSHH and accredited online training for COSHH Training, part of Online CPD Academy.