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 Virtual event, 30 August - 3 September 2021

Call for abstracts is still running after 15 May 2021.


Webinar series

Ozone-based solutions to fight pathogens

and related epidemics

 - State of knowledge, COVID-19 context / June 2021

 - Air and surfaces decontamination

 - Water application

 - Implementation

 - Comparison and coupling with other disinfectants


Book publishing

Ozone & Advanced Oxidation

Removal of microcontaminants in wastewaters


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



Get access to the last issue of the Association Newsletter


The subscription for membership 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)

    Industry solutions for production, purification and depollution.

    Medical therapy and facility safety.

Latest publications

OS&E volume 43 issue 2, 2021.

Login as IOA member to get access online.

Discover the Content

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

> Download the Programme & Book of abstracts.

> Download the Proceedings Order form.


Video Teaching Project Ozone in Medicine by R. Viebahn-Haensler

Free access for IOA members. Ask your code

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