Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 35, Issue 1, Pages 63-69Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es991253z
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During 1996-1997, residues of selected pesticides were monitored, at 3-month intervals, in 80 wells, including both irrigation and drinking water wells, distributed among the main corn-growing areas (Pieria, Thessaloniki, Serres, Kavala, and Evros) of Greece. Pesticide residues were found in 48% of the wells; however, in most cases residues were very low ranging from LOQs (quantification limits of the analytical methods) to <0.1 g/L while in 11% (nine wells) pesticide residues higher than 0.1 mug/L were present. Most of the latter wells were found in Evros and specifically the Ardas Valley. The frequency of occurrence, in descending order, was atrazine > DEA > alachlor metolachlor; however, the order of descending concentrations was atrazine > metolachlor > DEA > alachlor. The occurrence and the spatial and temporal distribution patterns of pesticide residues indicate that at the present the situation of groundwater quality is favorable throughout the corn-growing areas of Greece with the exception of the Ardas Valley.
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