Work package 5 work for BEST guidelines for co-treatment of industrial and municipal sewage is continuing by forming country specific annexes focusing on specific challenges in each country. All partner countries are currently arranging expert workshops in order to find development needs and solutions on national level. John Nurminen Foundation together with City of Helsinki arranged an expert workshop in Helsinki 16.1.2020 in order to outline specific annex for Finland. We want to thank all experts willing to share their competence and knowledge!