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For the period of 4 years, in quarter-time cycle, samples had been taken from surface microlayers and subsurface water of the lakes: Gardno, Jasień and Dołgie Wielkie, by two techniques (Garret net and glass plate). In each talked over layers we have analyzed contents of calcium, general alkalinity, conductance and water reaction (pH). We have also determined the ability of surface microlayer to accumulate these components and we have compared it to subsurface water ability and verified whether this ability depends on the kind of the lake.
Key words: surface microlayer, lake, alkalinity, pH value, calcium, conductivity