Sustain-COAST “Sustainable coastal groundwater management and pollution reduction through innovative governance in a changing climate” is an R&I project co-funded under the PRIMA 2018 programme section II, for a period of 4 years starting from June 2019. Sustain-COAST consortium is led by the Technical University of Crete (TUC) and is composed of a multidisciplinary team of seven partners from six countries. Sustain-COAST intends to develop a calibrated multi-criteria decision supporting system (DSS) and a web Geographical Information System platform accessible for water stakeholders and policy makers.