Prize for Research of the European-African-Asian-Australasian Group, it was created in 1985 to encourage further developments in the field of and its application. It is usually awarded every two years during the IOA World Congress.

Its name, formerly "Jean Hallopeau Prize" was changed in 2004 into "Willy Masschelein Prize" as testimony of our deep regard and friendship for Willy Masschelein and as a recognition of the outstanding work he has made for the Association being active member of the EA₃G and IOA Boards and EA₃G President.

The Willy Masschelein Prize is an award for original research revealing some unprecedent knowledge on any of the fundamental aspects of the industrial generation and the applications of ozone and derived oxidants. This award is presented after examination by a Scientific Board of papers on a level similar to that of a thesis for a Doctorate degree.

Sponsored by PAG, the Harvey M. Rosen Memorial Award was established in 1989 to recognise the “best paper” published in Ozone Science & Engineering [OS&E] during the two years period between World Congresses.

• Dr. Harvey M. Rosen was a prime mover behind the establishment of the International Ozone Association and of OS&E.
• He recognised the need for an ozone association early in the 1970s.
• He pressed for the creation [in 1979] of a peer-reviewed technical journal dealing with all aspects of ozone technologies.

The prestigious Morton J. Klein Award was established in 1995 to perpetuate the memory of Dr. Klein and his unparalleled contributions to the Association. Morton Klein was associated with the IOA since it was first organised as the International Ozone Institute (IOI) in 1973.

• Leadership: Elected in 1973 as the first chairman of the North American Executive Committee, the Institute's first governing board.
• Policy: Instituted the current policy of holding Ozone World Congresses every odd year, while allowing regional groups to hold workshops and symposia at any time.
• Structure: Restructured legal aspects of the IOI to be compatible with various tax codes.
• Evolution: Presided over changing the organization's name to the International Ozone Association in May 1978, making him the only President the IOI ever had and IOA’s first President.

The International Board of Directors bestows Honorary Membership in recognition of outstanding contributions towards furthering the ideals & objectives of the Association.

Honorary membership is normally proposed to the International Board by Regional Group Boards and is awarded by the International President at World Congresses. .