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Nitrate-concentrations in groundwater exceeded the compliance threshold of 50 mg l^-1 under the Nitrates, Groundwater and Drinking Water Directives in ca. 10 % of reported stations over the 2001-2008 period. Most of these stations are located in western and southern regions. High NO₃ concentrations in groundwater are found in particular in Spain, Belgium, Germany, Romania, Cyprus, Italy and Malta. The timeseries indicate increasing concentrations in the south-eastern region, possibly coupled to water scarcity and drought issues.