Study on water quality criteria of Endocrine disrupting chemicals in Weihe River based on species sensitivity distributions theory

According to species sensitivity distributions (SSD) theory, selecte the aquatic species existing widely in Weihe River and collect their toxicity data, a new SSD model: the natural logarithms-cumulative probability model distributing (Ln-Normal) was developed for Phthalol(DEP), Dibutylphthalate(DBP), and Bisphenol A(BPA).Based on their SSD curves, the hazardous concentration for 5% of the species (HC
₅
) were gotten. And then the criteria maximum concentration (CMC) and criteria continuous concentration (CCC) of DEP, DBP, BPA were 2150.5ug/L, 430.1ug/L; 10.92ug/L, 2.18ug/L and 485ug/L, 97ug/L, respectively.