The Urban Water Management Division hosted the 4th meeting of the DWA Working Group KA-6.2 (SBR plants) on September 23, 2022, the first meeting in attendance since it was constituted a year ago. The working group is dealing with a far-reaching update of the DWA-M 210 Code of Practice from 2009, as a result of which the status is to be upgraded to a DWA-A 210 Code of Practice. The background to this, in addition to the continuing increase in the experience base, are the changes in the corresponding technical regulations (DWA-A 131, DWA-A 102).