Water Quality in Slovenia - Agencija RS za okolje
Water Quality in Slovenia - Agencija RS za okolje
Water Quality in Slovenia - Agencija RS za okolje
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G R O U N D W A T E R<br />
In the chart 11 different concentration levels of nitrates and desethyl-atraz<strong>in</strong>e <strong>in</strong> alluvial aquifers as well<br />
as <strong>in</strong> aquifers with karst and fissure porosity are depicted. It is very obvious that groundwater bodies<br />
<strong>in</strong> alluvial aquifers are more polluted by nitrates and desethyl-atraz<strong>in</strong>e compared to groundwater<br />
bodies <strong>in</strong> aquifers with karst and fissure porosity.<br />
Chart 11: Difference <strong>in</strong> concentration levels of nitrates and desethyl-atraz<strong>in</strong>e <strong>in</strong> alluvial and aquifers with karst and<br />
fissure porosity <strong>in</strong> 2006<br />
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Statistical treatment often conceals the problem of pollution; the groundwater quality must<br />
therefore be verified at <strong>in</strong>dividual monitor<strong>in</strong>g sites. In the Table 18, the monitor<strong>in</strong>g sites with the<br />
highest concentrations of pollutants determ<strong>in</strong>ed <strong>in</strong> 2006 are listed. In groundwater of the Sav<strong>in</strong>jska<br />
kotl<strong>in</strong>a, high concentrations of nitrates, pesticides and tetrachloroethene were analysed at Levec. The<br />
pesticide bentazone exceeded ten times the quality standards <strong>in</strong> groundwater at Cerklje airport <strong>in</strong><br />
Krško polje. S<strong>in</strong>ce the beg<strong>in</strong>n<strong>in</strong>g of the groundwater quality monitor<strong>in</strong>g it has been started the most<br />
polluted part of the groundwater body Dravska kotl<strong>in</strong>a is the central part <strong>in</strong> Brunšvik, Kidričevo and<br />
Šikole. The ma<strong>in</strong> pollutants <strong>in</strong> all three sites are atraz<strong>in</strong>e and nitrates. High concentrations of atraz<strong>in</strong>e<br />
and the high ratio between atraz<strong>in</strong>e and its metabolite desethyl-atraz<strong>in</strong>e <strong>in</strong>dicate that, despite the<br />
ban, atraz<strong>in</strong>e is still be<strong>in</strong>g used <strong>in</strong> this area.<br />
In a part of the Murska kotl<strong>in</strong>a, groundwater is heavily polluted with chlor<strong>in</strong>ated organic solvents,<br />
primarily with dichloroethene, trichloroethene and tetrachloroethene, and additionally with nitrates,<br />
atraz<strong>in</strong>e and its metabolite desethyl-atraz<strong>in</strong>e.<br />
Automatic monitor<strong>in</strong>g station <strong>in</strong> Ljubljansko polje A well Črnci <strong>in</strong> Apaško polje<br />
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