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Oil refinery plant in the evening

Understanding CDM Regulations and COMAH Environments

COMAH onsite experience


COMAH establishments are regulated by the COMAH Competent Authority (CA), comprising the Health and Safety Executive (HSE), the Environment Agency, Natural Resources Wales (NRW) and the Scottish Environment Protection Agency (SEPA). Under the COMAH Regulations, the CA has statutory responsibility to provide regulatory oversight of high-hazard industries using or storing quantities of dangerous substances that fall into the scope of the Control of Major Accident Hazards Regulations 1999.


The Construction (Design Management) 2015 Regulations still applies if your project is carried out in a designated COMAH regulated site.  CDM North has the experience and knowledge for operating in this highly hazardous environment where the risk is constant, clear and evident.


It is critical that the planning and safe systems of works required are written with total cooperation and transparency and aligned with the clients COMAH site wide protocols and emergency procedures as required for COMAH 2015 Regulations compliances. These regulations must be aligned with the Construction (Design Management) 2015 Regulations where construction projects are carried out in COMAH regulated environments 


The aim of the Control of Major Accident Hazards Regulations 2015 (COMAH) is to prevent major accidents involving dangerous substances and to mitigate the effects on people and the environment of those that do occur. 


CDM North can develope, write and manage all this process for projects on your site on your behalf that will make sure that all managers and contractors are committed to promoting health and safety.

Operators of sites holding larger quantities of dangerous substances and gases and notifying as upper tier sites are subject to more requirements than lower tier sites. The COMAH site must be defined as either a tier 1 or tier 2. CDM North understands the working requirements and the differences and are able to demonstrate to clients that our onsite management, commitment and involvement are vital for successful health and safety performance to complete projects in COMAH regulated environments.

In the UK. The primary regulations that govern the handling of liquid hydrogen and the associated infrastructure are the DSEAR, COMAH, PER and the Carriage of Dangerous Goods Regulations (see sections 3.1.1 to 3.1.4) all of which arise from implementation of EU Directives.



The other regulations described below will still need to be adhered to, but in complying with the four primary regulations most of their requirements are likely to have also been met. General health and safety law, which would apply to any workplace or public area, will also need to be met under the current Health and Safety at Work Act 1974, and other applicable regulations such as the Construction Design Management 2015 Regulations.


CDM North can help all clients commercial, local authority, principal contractors, contractors help discharge the duties required to complete you construction project. Click here to contact us.

Control of Major Accidents Hazards 2015 Regulations 

We can help your plan manage organise and coordinate your project under the above regulations by helping you develop your strategy for the health and safety management required including the pre-construction information development, construction phase planning, safe systems of work, management of contractors, stakeholder management etc. Click here to contact us.

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