The purpose of this course is to acquaint students with the concept of ecotoxicity testing of chemical substances and preparations, as well as environmental samples. The course aims to impart knowledge about various ecotoxicity testing methods, the techniques used to determine toxicity indices, and the interpretation of the results obtained, including the assessment of environmental risk. The course will cover both conventional and alternative testing models, and will also delve into the programs and methods of environmental monitoring that use bioindication.