background level — the concentration of a substance or the value of an indicator in a body of groundwater corresponding to no, or only very minor, anthropogenic alterations to undisturbed conditions 5)

baseline level — the average value measured at least during the reference years 2007 and 2008 on the basis of monitoring programmes implemented under Article 8 of Directive 2000/60/EC or, in the case of substances identified after these reference years, during the first period for which a representative period of monitoring data is available 6)

groundwater quality standard — an environmental quality standard expressed as the concentration of a particular pollutant, group of pollutants or indicator of pollution in groundwater, which should not be exceeded in order to protect human health and the environment 1)

input of pollutants into groundwater — the direct or indirect introduction of pollutants into groundwater as a result of human activity 4)

Pesticides — plant protection products and biocidal products as defined in Article 2 of Directive 91/414/EEC and in Article 2 of Directive 98/8/EC, respectively 1.

significant and sustained upward trend — any statistically and environmentally significant increase of concentration of a pollutant, group of pollutants, or indicator of pollution in groundwater for which trend reversal is identified as being necessary in accordance with Article 5 3)

threshold value — a groundwater quality standard set by Member States in accordance with Article 3 2)

Total — the sum of all individual pesticides detected and quantified in the monitoring procedure, including their relevant metabolites, degradation and reaction products. Pollutant Quality standards Nitrates 50 mg/l Active substances in pesticides, including their relevant metabolites, degradation and reaction products 0,1 μg/l 0,5 μg/l (total) 1.