UK NUCOMAH Dataset
This dataset comprises the latest officially reported UK Major Accident Hazard (COMAH) addresses published by the Health and Safety Executive, along with the Nuclear Site locations as advised by the Office of Nuclear Registration (ONR) in January 2017. All locations are geocoded (geo-referenced) to postcode unit level. Geographic coverage is England, Scotland, Wales and N. Ireland.
The Control of Major Accident Hazards (COMAH) Regulations 2015 and registration requirements came into effect on 1 June 2015. COMAH are the enforcing regulations within the United Kingdom of the Seveso II Directive devised in Brussels following the Seveso disaster. They are applicable to any establishment storing or otherwise handling large quantities of industrial chemicals of a hazardous nature. Types of establishments required to register include chemical warehousing, chemical production facilities and some distributors.
The principal aim of the regulations is to reduce the risks of potential major accidents, such as the Flixborough disaster, that are associated with the handling of hazardous substances.

More information
• COMAH regulations operate on two hazard levels based on each establishment's inventory and associated risk status; 'Lower Tier' and 'Upper Tier'. Tier level is indicated in the dataset along with each establishments geocode (x,y and latitude longitude geo-reference).
• Risk analysts, underwriters and actuaries can rate risk at a local level with an understanding of proximity to Major Accident Hazard locations to make optimal pricing and portfolio decisions.
• For ease of use by Insurer systems, the dataset is available as a complete file (.csv) or through web services from the emapsite Perils data hub.