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In the system of environmental monitoring, biomonitoring plays an important and independent role. The essence of the method determining the toxicants' effect consists in the specially selected organisms under standard conditions and recording different behavioral, physiological and biochemical factors. The paper studies the biological influence of modeled drilling mud components. The research results have shown the toxic effect of investigated muds. The obtained data confirm that biotesting can be applied for drilling fluids certification by the complex assessment of hazardous substances

Biotesting of modeled drilling mud as an indicator of environmental risk