We kindly welcome you to get acquainted with a Copernicus Service Evolution project within the Research and Innovation Action program of the H2020 framework. Being part of the cluster of projects for Space Research by the European Commission our working team is honored to inform you about the Copernicus Assisted Lake Water Quality Emergency Monitoring Service (WQeMS). In the previous volume (Newsletter ΙΙΙ) the services were presented, which are directly related to the increment of substances dissolution/ concentration in the water (water quality features changes, bloom events detection, extreme events detection) and their scope. In this volume we are presenting the evolution of the rest service components (land-water transition zone change monitoring, alerting through reporting and crowdsourcing and capacity building through the provision of training material and tools), their results in the pilot areas and the benefits deriving for the users (e.g. water utilities) and the end users (e.g. citizens). Follow us at our social media accounts and visit our website for more information: https://wqems.eu/