This document is a newsletter from the IWA Specialist Group on Wetland Systems for Water Pollution Control dated May 2016. It provides information on recent and upcoming activities of the specialist group including a task group working on mainstreaming treatment wetlands, the transition from the IWA Water Wiki to the new IWA Connect platform, and various conferences. It also includes calls for proposals to host the 16th international conference on wetland systems in 2018 and calls for candidates for chair and secretary of the specialist group for the 2017-2020 term.