The OHTA training materials are available at four levels: Awareness, Foundation, Intermediate and Specialist. More information about the training scheme and qualifications framework can be found here.

The published training materials in current use are listed below. Examinations (where appropriate) are based on these materials.


OHTA201 – Basic Principles in Occupational Hygiene

This course aims to provide a practical understanding of occupational hygiene for people who need to manage or advise on workplace health issues. It is a foundation from which to undertake more in-depth study in individual occupational hygiene subjects.

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OHTA501 – Measurement of Hazardous Substances

Understand the techniques for assessing exposure to hazardous substances in the workplace and how exposure information can be used to assess risk.

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OHTA502 – Thermal Environment

Understand the effects of the thermal environment on people and learn to assess and control the risks associated with thermal stress.

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OHTA503 – Noise Measurement and its Effects

Understand the techniques for assessing exposure to hazardous substances in the workplace and how exposure information can be used to assess risk.

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OHTA504 – Asbestos and Other Fibres

Extend your knowledge of occupational exposure to fibrous dusts and understand the health risks of asbestos and other fibres as well as the means of evaluation and control.

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OHTA505 – Control of Hazardous Substances

Learn about how exposure to hazardous substances arises in the workplace and build your knowledge of the methodologies and technologies available to reduce risks to health.

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OHTA506 – Ergonomics Essentials

Learn the basics of ergonomics and how to apply ergonomics in the design of work, equipment and the workplace including social and legal concerns.

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OHTA507 – Health Effects of Hazardous Substances

Learn the basics of toxicology, physiology and epidemiology as well as the identification of hazardous substances and their harmful effects on target organs.

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