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Seveso III Directive

Chemical plant

The Seveso Directives are the main EU legislation dealing specifically with the control of on-shore major accident hazards involving dangerous substances. The Seveso III Directive came into force on 1 June 2015, replacing the Seveso II Directive.  To implement this Directive, the COMAH Regulations 1999 (as amended) have been revoked and replaced by the COMAH Regulations 2015.

Legal guidance on COMAH Regulations 2015

Working in partnership


HSE, the Environment Agency, SEPA and NRW – working in partnership as the COMAH Competent Authority.

Emergency planning in Scotland

The Regulations in force from 1 June 2015 currently place the duty to prepare, review and test external emergency plans for upper tier establishments in Scotland on the Scottish Fire and Rescue Service.

This reference will be amended imminently to place the duty back on the relevant unitary authority in Scotland.  In the meantime the arrangements established under the COMAH Regulations 1999 should continue.


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Updated: 2015-06-04