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.



24th IOA Ozone World Congress & Exhibition: 20-25 October 2019 in Nice (France). Mark your calendars to save the dates! The call for papers is open until 13th May. More information on or contact:

Download the Programme & Book of abstracts.

Download the Proceedings Order form .



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 2020 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

International IOA-EA3G Conference & Exhibition on Ozone and Advanced Oxidation: Solutions for Emerging Pollutants of Concern to the Water and the Environnement. 5-7 September 2018, Lausanne, Switzerland. Organized by IOA-EA3G and Service de l'Eau de la ville de Lausanne.



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