Pollution levels were estimated by conventional methods made use of in Poland and by the criteria recommended in relevant EU directives. The results obtained using 'domestic' methods differred from those achieved in terms of tlwEU criteria. And this indicates that the erection of hydroengineering struc-tures (especially when they are to operate on transboundary waters) requires decisions made on an international level in order to specify which of the available methods forwater quality assessment must be used. Our analyses showed that, irrespective of the estimating method applied, the quality of the investigated riverine water improved continually, and the rate of quality variations differred according to the pollutant under analysis. When use was made of the EU criteria, a considerable portion of the total river length carried water which was fit for municipal supply — provided that the treatment train involved advanced processes. Our analyses also showed that organic matter con-centrations and salinity decreased at a faster rate than did nutrients.
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Praca analizuje prawodawstwo Unii Europejskiej z zakresu ochrony wód, porównuje normy jakości obowiązujące w Polsce z odpowiednimi dyrektywami Unii i wskazuje możliwości ich wdrożenia wraz z oszacowaniem kosztów. Na podstawie zbioru danych monitoringowych określa trendy zmian jakości wód w Polsce oraz porównuje wyniki dotychczasowych ocen z klasyfikacją dokonaną na podstawie dyrektyw Unii Europejskiej.
EN
The authors of the paper concentrate on the following items: EU legislation concerning water pollution control, comparison of water quality standards enforced in Poland with relevant EU Directives, and potentiality for the implementation of the EU directives in Poland (incIuding assessment of the costs involved). Making use of monitoring data, the trends of water quality variations in Poland are determined and the results are compared with the cIassification established on the basis of EU Directives.
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