Wastewater treatment • Micropollutants and microplastics • Energy efficiency and green house gas emissions • Sewer management and treatment of combined sewer overflows • Sustainable stormwater management • Climate change adaptation • Circular economy • Sludge management • Resource recovery, recycling and recovery of nutrients, reuse of wastewater • Biogas production and use • Sustainable Development Goals and wastewater • Management, governance, bechmarking and new legislation • Digitalisation • Protection of the Baltic Sea and co-operation around the Baltic Sea area