This indicates that in addition to their mobility, most compounds within these classes are potentially persistent. Based on the EU CLP definition of toxicity, an EC10 less than 0.01 mg/L is toxic for marine or freshwater organisms. Some of the predicted LC50 toxicity values (the lethal concentration at 50% of the population) shown in Figure go below 0.1 mg/L. As toxicity is usually observed before lethality, this indicates that some of the compounds may be toxic below 0.01 mg/L. In addition, it is important to note that this is not the only toxicity criterion used in the CLP, for example, triazole compounds have been shown to have endocrine-disrupting properties by e.g., [134] and thus it is likely that at least a fraction of these compounds would be classified as PMT.