For the Prut, a unified monitoring programme and GIS is also called for. At the same time, there arc also positive examples: Lithuania has been monitoring transboundary aquifers with Poland for more than 15 years, and in 2010 groundwater monitoring was initiated based on bilateral agreement between the Lithuanian Geological Survey and the Kaliningrad Agency of Mineral Resources. Discharges of non-treated or insufficiently treated wastewater, municipal and industrial, still remains a major widespread pressure factor. This is particularly critical for industrial wastewaters with hazardous substances that arc not treated before being discharged into surface waters or are not prc-ircatcd before being discharged into the sewer systems.