The Baltic Sea Challenge organises international seminars together with other organisations and projects:

• Challenge for a Healthier Sea, 9 February 2010
• Local Actors as forerunners, 16 March 2011
• Steady as she goes, 4 June 2013
• Talk about water: how to save the sea? Turku 2014
• Restoring Waters in the Baltic Sea Region - A Municipality Strategy to Capture Local Benefits, Jurmala 2015
• Nutrient neutral municipalities – ideas for circular economy and Baltic Sea protection, Malmö 2015
• Water protection in municipalities – it costs money, because it saves money, Tallinn 2015

• Cooperation across borders in environmental education and awareness raising – towards a clean and shared Baltic Sea, St. Petersburg 2016

• Clean Beach events in Helsinki, Tallinn, St. Petersburg and Turku on 23 April 2016