The only association that gathers over 1000 scientific and technical members around fundamental, engineering and applied aspects of oxidation technologies involving ozone or any related oxidants for any purpose.

The EA3G group of IOA manages IOA membership in Europe, Africa, Asia and Australasia.


  • 25th WORLD CONGRESS as Web conference August 30 - September 3, 2021
  • Webinars serie on disinfection
  • IOA-EA3G web conference

Membership benefits

Membership in IOA gives you the opportunity to:


- Get the latest information on research topics, current issues, technologies under development, new applications and equipments in connection with ozone and derived or comparable oxidants through publications and events with discounts on rates


- Meet colleagues and specialists working in your interest fields, collaborate with them to share experiences and debate positions, establish business contacts via IOA network.


- Contribute to extend knowledge about ozone and related oxidants, participating at conferences, writing papers for publication.


- Take part in programs for a wide admission of potentialities offered by ozone-based technologies.


What's on


The call for subscription to IOA for year 2021 is open.  Apply by clicking here .

IOA Events

In addition to its biennal World Congress, IOA organises each year through its three Regional Groups international conferences, workshops and exhibitions on topics of major interest for solving current issues in:


  • Environmental and human health protection (water, air, soil and waste purification)
  • Medical therapy and facility safety.

Latest publications

OS&E volume 42 issue 6, 2020.

Login as IOA member to read it online.


24th IOA Ozone World Congress & Exhibition: 20-25 October 2019 in Nice (France). More information on or contact:

>Download the Programme & Book of abstracts.

>Download the Proceedings Order form.


Book on micropollutants (to be published in 2021)


Book on Medical application (to be published in 2021)


search iconSearch