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The Occupational Hygiene Training Association (OHTA)

OHTA was formed to promote better standards of occupational hygiene practice throughout the world.  We develop training materials and make them freely available for use by students and training providers.  We also promote an international qualifications framework so that all hygienists are trained to a consistent, high standard, recognized in all participating countries.

Our principles

OHTA began as an informal collaboration between dedicated occupational hygiene professionals who wanted people around the world to enjoy the benefits of healthy working environments.   It has matured into an international framework supported by many national occupational hygiene organisations and the International Occupational Hygiene Association.

OHTA operates with a few basic ground rules. Our aims are to be:

  • Inclusive
  • Straightforward
  • Transparent
  • Accessible
  • Engaging

We believe that adhering to these operating principles will help to grow the global occupational hygiene community and encourage consensus standards.

Financial support and sponsorship

OHTA is a registered UK charity (charity number 1168722). Much of the work of OHTA is done on a voluntary basis and this helps us to keep our costs to a minimum. Our operating costs are funded primarily by a small levy on approved training providers based on the number of their students taking OHTA examinations. We rely on sponsors and supporters who share the aims of OHTA to provide funding for investments such as new course development and translations into multiple languages. We are very grateful to the many organisations, including industrial companies, occupational hygiene consultancies and national associations, who help to make our work possible. 

OHTA partners with many organisations to enable delivery of the international training and qualifications system.  Some of these organisations are commercial providers and we recognise their need to have a sustainable business model and to charge for their services.

training workshop

Getting OHTA's seal of approval

A group of trainees are shown around a factory environment.