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COSHH Assessment: Controlling Exposure to Hazardous Substances

In many industries, exposure to hazardous substances is a critical occupational health risk that cannot be managed through PPE alone. A structured and legally compliant way to control these risks is the Control of Substances Hazardous to Health (COSHH) Assessment.

What is COSHH?

COSHH is a structured risk assessment required under UK health and safety regulations to identify, assess and control risks to health arising from hazardous substances. A COSHH assessment evaluates:

  • The hazardous properties of the substance.
  • How and where the substance is used.
  • The routes of exposure.
  • Workplace Exposure Limits (WELs) as defined in HSE EH40.

Purpose of COSHH

  • Identify health risks associated with hazardous substances.
  • Assess exposure levels and potential health effects.
  • Define effective control and mitigation measures.
  • Ensure compliance with the COSHH Regulations.
  • Protect workers and others from occupational illness.

COSHH methodology

The assessment reviews each substance’s hazards, conditions of use and exposure scenarios. For every substance it considers the Material Safety Data Sheet (MSDS), the exposure routes and duration, the existing control measures and any additional controls required. Findings are documented, reviewed and communicated to employees and relevant stakeholders.

COSHH outputs

  • Substance-specific COSHH risk assessments.
  • Defined exposure control measures.
  • Clear health risk mitigation actions.
  • Auditable COSHH documentation.
  • PDF reports ready for review and approval.

Why COSHH is important

  • It is a legal requirement for organisations with five or more employees.
  • It protects against short-term and long-term health effects.
  • It demonstrates compliance and due diligence.
  • It reduces occupational health risks and liabilities.
  • It supports effective health and safety management systems.

Everyday products that are hazardous

Many common products used in construction and industrial activities are classified as hazardous, including paints, adhesives and sealants; concrete, mortar and plaster; fuels, oils and lubricants; and silica dust, wood dust and solder fumes.

How EnTech can help

We review hazardous substances and MSDS, carry out substance-specific risk and exposure assessments, recommend practical and compliant control measures and provide clear, auditable COSHH documentation. Contact us at info@EnTech-Solution.com.