Winners
Diplomas of Excellence: Emily Elhacham, Israel; Mary Zhao, Canada
2008
Joyce Chai, USA
Diplomas of Excellence: Alexey Shinkarev, Russia; R. D. Dasun Thakshala siriwardana, Sandun Gayath Sameera Dissanayaka, and A. Sujith Madushan Silva, Sri Lanka
2007
Adriana Alcántara Ruiz, Dalia Graciela Díaz Gómez and Carlos Hernández Mejía, Mexico
Diploma of Excellence: Yang Guo, Junhong Wu and Sisi Yu, China
2006
Wang Hao, Xiao Yi and Weng Jie, China
Diploma of Excellence: Satomi Kosho, Naomi Sugimoto and Sae Nishino, Japan
2005
Pontso Moletsane, Motebele Moshodi and Sechaba Ramabenyane, South Africa
Diplomas of Excellence: Ricardo Martín Robledo and Antonio de la Cruz Cáceres, Argentina; Itzel García Silvia and Liliana Vargas Meneses, Mexico; and Marc Campeny Crego and Marc Oliva Bernal, Spain
2004
Tsutomu Kawahira, Daisuke Sunakawa and Kaori Yamaguti, Japan
Diplomas of Excellence: Ron Neuman, Israel
2003
Claire Reid, South Africa
2001
Magnus Isacson, Johan Nilvebrant and Rasmus Öman, Sweden
2000
Ashley Mulroy, USA
1999
Rosa Lozano, Elisabeth Pozo and Rocío Ruiz, Spain
1998
Robert Franke, Germany
1997
Stephen Tinnin, USA
2009
Gretchen McClain, president of the commercial business unit of ITT Corporation with Emily Elhacham of Israel, Ceren Burçak Dag of Turkey (winner), Mary Zhao of Canada and Mr. Peter Forssman, Chairman of Stockholm Water Foundation