The problem of water safety has been concerned by everyone, it is related to ecology and health. With the help of water quality standards through the water quality analyzer to judge the safety of water quality. Among them, biological toxicity test can directly reflect the comprehensive toxicity characteristics of all co-existing pollutants in water, which has gradually developed into an important part of water quality safety assessment. So how do we measure biological toxicity in water? Can be seen from the following points:

1.Starting from the biological effects of pollutants, the commonly used biological toxicity test methods of lethal toxicity, genotoxicity, endocrine disruption and other effects were summarized;

2.The biological toxicity test methods commonly used in water quality toxicity evaluation and the corresponding toxicity evaluation indexes are discussed.

3.Water quality safety evaluation methods based on biological toxicity testing are summarized, including potential toxicity method, toxicity unit grading evaluation method, potential ecotoxicity effect index method, and water quality safety evaluation based on group biological toxicity test, etc., and the advantages and disadvantages of each method are discussed.

Traditional water quality assessment methods only measure the content of pollutants, which can not directly and comprehensively reflect their comprehensive impact on the environment. Biological toxicity testing methods make up for the shortcomings of traditional methods, can effectively detect the comprehensive biological effects of all co-existing pollutants in water bodies, and can directly evaluate the safety of water quality. It is widely used in drinking water, industrial wastewater, domestic sewage and other environmental water bodies, and has gradually developed into an effective supplement to traditional water quality assessment methods. It can be seen that biotoxicity test and related evaluation methods have become the basis of water quality safety evaluation and are of great significance to protect water quality safety. The instrument used to detect biological toxicity in water is the WTox-8000 Biological Toxicity Online Analyzer!