The test of toxicity are important tools by monitoring the quality of surface and ground water, before and after their treatment to drinking water level. The tests of toxicity are proposed to introduce standard of ISO and EN: inhibition of algae growth with using Scenodesmus suspidatus and Selenastrum capricornutum, inhibition of bioluminecsence and genotoxicity test-UMU. The present paper discribes the using of test, defect and advantage of this tests.