Preliminary results of groundwater and surface water quality studies on the area of storage reservoir Jezewo

According to Water Frame Directive of EU from 23 October 2000 [13] water supplies are related inseparably both with the quantity as well as with quality of water. The initiation of the Water Frame Directive in Poland extorts undertaking of decided actions accelerating the improvement of water quality at present. Document this assumes achievement of the good state of water in 2015. The paper presents preliminary study results of the quality of surface waters and groundwaters in the basin of storage reservoir Jezewo. The studies were carried out in the years 2005 divided by 2006 in I I measurement wells and on the tributaries of Pogona and Serawa rivers in Jezewo storage reservoir and on water outlet. Water samples taken for laboratory analyses in 6-months intervals included the determination of the basic physico-chemical properties according to the valid standards. For the assessment of surface water, a 5-degree quality scale was applied. The waters of Pogona and Serawa rivers can be classified to the fifth class of purity, i.e. to waters of a bad quality. On the other hand, 45% of the wells of groundwater have been qualified as waters with a satisfactory quality, while 30% have an unsatisfactory and bad quality class. Only 18% of wells are characterized by a good and very good water quality. One can notice a positive effect of Jezewo reservoir on the quality of outlet waters.