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The data on 180 distinct pesticides were extracted with such process, collected at a total of 16,886 groundwater monitoring sites and 9,495 surface water [1] monitoring sites (accounting for 3.63 million annual records altogether). The list of pesticides by water category, the number of records, and the number of monitoring sites at which the substance was monitored, as well as the time period, is available in Annex 1 for groundwater and for surface waters in Annex 2. Figure 3.3 illustrates the number of pesticide-monitoring sites per year.

[1]Water categories of “groundwater” and “surface water” (the latter including both river and lake monitoring sites) are defined for the purpose of this report.