Досліджено гідрохімічний склад річок Шкло, Завадівка, Смолінка, Гребелька Яворівського району Львівської області. Вміст більшості компонентів у межах норми, і лише на окремих ділянках сульфати, органічні і завислі речовини перевищують ГДК.
In the course of five seasons (2005-2007) in 50 samples of river waters macro- and microcomposition, the dissolved oxygen in particular, permanganate oxidizability, chemical oxygen demand, biochemical oxygen demand (after 5 days), particularly NH4^+, NO2^-, NO3^-, PO4^3-, Si, Fe, F^-, phenols, the suspended substances have been tested. Their contents are restricted by maximum permissible concentrations. The analysis of a hydrochemical material testifies to a satisfactory condition of waters of the Zavadivka, Hrebelka Rivers located in the Yavoriv district of the Lviv Region. But waters of the River Shklo in the town of Yavoriv and urban village Krakovets are polluted the concentration of some components exceeds the requirements of the sanitary standard several times: sulphates - 1.1-2.2 times, ferrum - 2-15 times, organic substance - 1.5-2.4 times.