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COSHH Assessment Guide

Learn how to assess hazardous substances in your workplace. Create COSHH assessments quickly with our free generator.

What is COSHH?

COSHH stands for the Control of Substances Hazardous to Health Regulations. These regulations require employers to control exposure to hazardous substances to prevent ill health. They cover all workplaces in the UK.

Hazardous substances include chemicals, dusts, fumes, gases, biological agents, and any substance with the potential to cause harm if inhaled, ingested, or absorbed through the skin.

5 Steps to a COSHH Assessment

Follow these steps to create compliant COSHH assessments

1
Identify Hazardous Substances

Walk around your workplace and identify all substances that could cause harm. This includes chemicals, dusts, fumes, biological agents, and any product with hazard symbols.

Cleaning products
Paints and solvents
Cement and concrete
Wood dust
Welding fumes
Biological agents
2
Assess the Risks

For each substance, consider how it enters the body (inhalation, skin contact, ingestion), the likelihood of exposure, and who might be exposed.

Route of exposure
Duration and frequency
Concentration used
Who is exposed
Existing controls
3
Decide on Precautions

Determine what control measures are needed. Follow the hierarchy of controls: eliminate, substitute, engineering controls, administrative controls, PPE.

Eliminate the substance
Use safer alternatives
Install ventilation
Reduce exposure time
Provide PPE
4
Record Your Findings

Document your COSHH assessment including the substances, risks, and control measures. This is a legal requirement if you employ 5 or more people.

Substance details
Hazard classification
Exposure routes
Control measures
Health surveillance needs
5
Review and Update

Review your COSHH assessments regularly, when substances change, when work processes change, or after any incidents.

Annual review
Process changes
New substances
Incident investigation
Regulation updates

Common Hazard Symbols

Look for these CLP hazard pictograms on product labels

Flammable

Substances that catch fire easily

Oxidising

May cause or intensify fire

Explosive

May explode if heated or ignited

Toxic

Can cause death if swallowed, inhaled, or absorbed

Health Hazard

May cause damage to health

Corrosive

May be corrosive to metals or skin

Irritant

May cause irritation to skin or eyes

Environmental Hazard

Toxic to aquatic life

Frequently Asked Questions

Create Your COSHH Assessment

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About COSHH Assessments

The Control of Substances Hazardous to Health (COSHH) Regulations 2002 require employers to assess and control the risks from hazardous substances in the workplace. COSHH assessments are a legal requirement and must be documented if you employ 5 or more people.

A COSHH assessment identifies hazardous substances, evaluates the risks of exposure, and documents the control measures needed to protect workers. It should be based on information from safety data sheets and consider how substances are actually used in your workplace.

Our risk assessment generator can help you create COSHH assessments quickly by identifying common hazards and suggesting appropriate control measures based on your specific substances and tasks.