Organisers of the ENVIBRNO Environmental trade fair. Water Management and Environmental Technology. Ecological Fairs Brno rank among the largest fairs in Central and Eastern Europe focusing on water management, waste management and protection of all aspects of the environment. They are regularly attended by most market leaders from the Czech Republic and abroad. The fairs consist of the International Water Management Exhibition VODOVODY-KANALIZACE (VOD-KA) and the International Environmental Fair ENVIBRNO.