John Nurminen Foundation together with City of Helsinki arranged an expert workshop in Helsinki in order to outline specific annex about Finland for the BEST guidelines for co-treatment of industrial and municipal sewage. All BEST partner countries are currently doing similar work. The aim is not only to produce Baltic Sea Region wide guidelines but also country specific annexes that focus on specific challenges in each country. Experts taking part to this work represent waterworks personnel, water work associations, environmental authorities, research organizations and industries. We want to thank all experts that are willing to share their competence and knowledge!