The article studies the informative value of test objects for the evaluation of potable water which contains toxic substances. A number of test objects is proposed by the authors to estimate the chemical harmlessness of water: tetrachimens, Daphnia and peroxide ferment system. The data obtained with the help of test-objects possess a sufficient selective sensibility as far as maximum allowable concentration of various toxic substances is concerned. The authors stress that these methods of biological testing may complement or precede the traditional methods of water evaluation.
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Department of Animal Biosciences, University of Guelph, Guelph, Ontario, N1G 2W1, Canada. Electronic address:
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