What is a major hazard site?
In the UK, we have some sites that contain significant amounts of flammable or explosive substances. These are known as Control of Major Accident Hazards (COMAH) sites. There are two types of COMAH sites, “upper tier” sites which hold large quantities of these hazardous materials, and “lower tier” sites which hold smaller quantities.
The operators of these sites have a legal duty to prevent accidents happening and to mitigate any potential impacts. These sites are also closely monitored by the Health and Safety Executive who ensure that standards, codes of practice, and guidance are met. For more information on COMAH sites and the legislation surrounding them, visit the HSE pages by clicking on the link below:
Across Hampshire and the Isle of Wight, there are 8 upper tier sites. These locations are publicly available, and you can search to see if you live or work near a COMAH site. Follow the link below and input your postcode to see if there are COMAH sites within 3 miles.
While these sites are closely monitored, there is always a risk of accidental fire, explosion or chemical release.
Around every COMAH site is an area identified as the Public Information Zone (PIZ). If you live within the PIZ, the site operator will provide you with an information leaflet which will tell you how you will be notified about an incident and what you should do in the first instance.
What does the Local Resilience Forum do to prepare?
Under the COMAH regulations, Local Authorities are required to write Emergency Plans for each COMAH site, which are trained and exercised at least every three years by multi-agency partners. Regular meetings are also held with multi-agency partners and site operators. Other responding agencies such as Hampshire and Isle of Wight Fire and Rescue Service also have specific arrangements in place for each site.
How can you prepare?
Before
Find out if you live or work near a COMAH site.
Ensure new neighbours or vulnerable people are aware
Know the arrangements for your children’s school(s) and your employers
Ensure you can access your buildings / contents insurance contacts at all times
Ensure you have adequate food supplies
Ensure you have adequate medication supplies
During
Tune into your local radio station or follow social media for advice
Follow guidance from the emergency services
You made be advised to take ‘shelter’: you should stay in your home with the doors and windows closed until you are informed it is safe to exit
Helpful links and resources
Public information on establishments subject to COMAH 2015
Visit the Health and Safety Executive website for more information on COMAH sites
COMAH 2015 Public Information Search
This page allows you to search for Public Information about Establishments that are covered by the Control of Major Accident Hazards (COMAH) Regulations 2015.
You can search for sites using a postcode, or by individual Establishment or Operator name.
