Major hazard HSE notice: what the check means
What it means when a company has an HSE notice under a major hazard regime such as COMAH, and why it matters for suppliers handling dangerous substances.
- Severity
- High
- Category
- Operational
- Plan
- Free and above
- Test code
- OPS-010
- Source
- Health and Safety Executive public register of enforcement notices · check it yourself
0.08% of UK companies show the related measure: health and safety enforcement notice
The published figure counts companies served any HSE enforcement notice in the past three years, not only this kind.
4,277 of 5,416,028 companies where this can be known, measured 1 October 2026. From the UK Supplier Risk Index, public registers only.
What this test checks
Looks for HSE enforcement notices served under specialist regimes for major industrial hazards, such as the Control of Major Accident Hazards (COMAH) regulations, which cover sites holding large quantities of dangerous substances, and notices on Crown premises.
A notice under these regimes tells you both that the company runs a high-hazard operation and that a regulator found something wrong with how it was managed.
What a fail looks like
At least one notice under a major hazard regime. The consequences of failure at such sites can reach beyond the site itself.
Harmless explanations
- Large, well-run high-hazard operators are inspected often and can receive notices for specific, contained issues.
What to do
- Ask what the notice covered and how it was resolved.
- For suppliers handling dangerous substances on your behalf, ask for their safety report or major accident prevention policy.
Background: Environmental and social risk.
Related tests
- OPS-004HSE Prohibition Notice Issued
- OPS-006HSE Notice Currently Ongoing
- OPS-015Environment Agency Court Case
Part of the test catalogue. Every check Senserity runs, with its severity and the plan it is available on.
Last reviewed .