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Abstract

Banning of the Oxadixyl fungicide started year 2003 in France, but after 8 years, our study clearly gave an evidence that it can be detected in the surface water of Bordeaux Lac, France. Oxadixyl can pose harm to human and aquatic resources especially when toxicity is the issue. Two water sampling campaigns were performed in 2011, in four different locations of the lake. Concentration detected were from less than 2ng/L to a maximum of as 160ng/L. The collector of rain waters displays some important concentration measured and can be considered as a source, but not the only one. This is as highest concentration during the 2nd sampling campaign was detected almost at the center of the lake in 6 meter deep. Also, the presence of this molecule in most of the sampling duration despite differing meteorological conditions indicates its persistence. The results instigate the necessity to further monitor Oxadixyl in the area to pinpoint the sources. Furthermore, although the concentration seems low, mass fluxes should be looked into. Mostly, if environmental risk and management are to be considered.