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COMAH - Guidance

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This is where you will find the key information and guidance on COMAH and how to achieve compliance with it.

The COMAH Regulations

COMAH competent authority guidance and key internal CA procedures

Other COMAH guidance

Link URLs in this page

  1. COMAHhttps://www.hse.gov.uk/comah/index.htm
  2. Overview - Backgroundhttps://www.hse.gov.uk/comah/background/index.htm
  3. Seveso IIIhttps://www.hse.gov.uk/seveso/index.htm
  4. COMAH Regulations 2015https://www.hse.gov.uk/comah/background/comah15.htm
  5. Cost recovery in detailhttps://www.hse.gov.uk/comah/charging/index.htm
  6. The COMAH Competent Authorityhttps://www.hse.gov.uk/comah/authorityindex.htm
  7. Guidancehttps://www.hse.gov.uk/comah/guidance.htm
  8. Competent authority guidance and key internal CA procedureshttps://www.hse.gov.uk/comah/ca-guides.htm
  9. Notificationshttps://www.hse.gov.uk/comah/notification/index.htm
  10. Submitting public informationhttps://www.hse.gov.uk/comah/submitting-public-information.htm
  11. Establishments subject to COMAH 2015https://www.hse.gov.uk/comah/comah-establishments.htm
  12. Emergency plan testing during coronavirushttps://www.hse.gov.uk/comah/external-emergency-plan-tests-during-coronavirus.htm
  13. Resourceshttps://www.hse.gov.uk/comah/resources.htm
  14. Safety alertshttps://www.hse.gov.uk/comah/alerts/index.htm
  15. Investigation reportshttps://www.hse.gov.uk/comah/investigation-reports.htm
  16. Complete a short surveyhttps://www.surveymonkey.com/r/3YY388L
  17. A guide to the Control of Major Accident Hazards Regulations 2015 (L111)https://www.hse.gov.uk/pubns/books/l111.htm
  18. The Control of Major Accident Hazards Regulations 2015 (COMAH Regulations in full)http://www.legislation.gov.uk/uksi/2015/483/contents/made
  19. The Control of Major Accident Hazards (Amendment) Regulations 2015 (redefining 'local authority' in Scotland)http://www.legislation.gov.uk/id/uksi/2015/1393
  20. Information to support COMAH amendment regarding transport directly related to temporary intermediate storage activities and transport in pipelineshttps://www.hse.gov.uk/comah/assets/docs/comah-transport-pipelines-additional-information.pdf
  21. The Health and Safety (Miscellaneous Amendments and Revocation) Regulations 2017http://www.legislation.gov.uk/uksi/2017/304/contents/made
  22. HSE Competent Authority procedures and delivery guideshttps://www.hse.gov.uk/comah/ca-guides.htm
  23. Safety report assessment manual – CA internal guidancehttps://www.hse.gov.uk/comah/ca-guides.htm#sram
  24. Safety report assessment guides – CA internal guidancehttps://www.hse.gov.uk/comah/ca-guides.htm#srag
  25. Safety report assessment technical criteria – CA internal guidancehttps://www.hse.gov.uk/comah/sragtech/index.htm
  26. COMAH establishment inspection – CA internal guidancehttps://www.hse.gov.uk/comah/ca-guides.htm
  27. Cyber Security for Industrial Automation and Control Systems (IACS) Operational Guidance https://www.hse.gov.uk/foi/internalops/og/og-0086.pdf
  28. Electrical, Control & Instrumentation (EC & I) in the Onshore Chemicals, Explosives and Microbiological Sectorshttps://www.hse.gov.uk/eci/index.htm
  29. Assessment of the Dangerous Toxic Load (DTL) for Specified Level of Toxicity (SLOT) and Significant Likelihood of Death (SLOD) https://www.hse.gov.uk/chemicals/haztox.htm
  30. Storage of gas in natural strata - application of the Control of Major Accident Hazards Regulations (COMAH) https://www.hse.gov.uk/comah/gasstorage.htm
  31. COMAH Strategic Forum and CDOIFhttps://webarchive.nationalarchives.gov.uk/ukgwa/20210408115606/https:/webcommunities.hse.gov.uk/connect.ti/COMAHSF/groupHome
  32. Newshttps://www.hse.gov.uk/news/index.htm
  33. Chemicalshttps://www.hse.gov.uk/chemicals/index.htm
  34. Nuclearhttp://www.onr.org.uk/
  35. Managing human factorshttps://www.hse.gov.uk/humanfactors/index.htm
  36. Safety bulletinshttps://www.hse.gov.uk/safetybulletins/index.htm
  37. Seveso III Directive https://www.hse.gov.uk/seveso/index.htm

Glossary of abbreviations/acronyms on this page

COMAH
Control of major accident hazards

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2025-02-06