Control of Major Accident Hazards Regulations (COMAH) Guidance

HSE is providing guidance for anyone who has duties under the COMAH Regulations 2015. The aim of the Regulations are to prevent and mitigate the effects on people and the environment of major accidents involving dangerous substances. An example of a major accident was the BP oil spill of 2010 on the Gulf of Mexico.

Although many duties will be familiar from the 1999 Regulations, the 2015 Regulations contain some new or changed duties including:
  • The list of substances covered by the Regulations has been updated and aligned to the CLP Regulation.
  • Some definitions have been altered.
  • There are transition arrangements for safety reports.
  • For emergency planning there is a new requirement for cooperation by designated authorities, in tests of the external emergency plan.
  • There are stronger requirements for public information including a duty for lower-tier establishments to provide it. There are provisions for electronic access to up-to-date public information.
  • The domino effects duty is broader, including a duty for members of a domino group to cooperate with neighbouring sites to share relevant information.
  • Stronger requirements for the competent authority on inspection.
  • After a major accident, local authorities must now inform people who are likely to be affected.
For more information and to buy or download a free copy of the Control of Major Accident Hazards Regulations (COMAH) 2015 Guidance please see here.
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