Abstract
Abstract Water contaminated by toxic chemicals causes a serious water crisis and possibly an ecological disaster. Therefore, it is crucial to set up a priority for controlling chemicals. The species sensitivity distribution (SSD) model has been established and improved by scientists and decision makers worldwide for ecological risk (eco-risk) assessment and water quality criteria (WQC). The selection of the best fitting model for the SSD and uncertainty analysis are two key steps in ecological risk assessment. In this chapter, a platform, named the Bayesian matbugs calculator, was developed to select the best SSD model and to assess ecological risk at high-, mid-, and low levels of the 95% credible interval. Predicted no-effect concentration (PNEC) deduced from ecotoxicity data with assessment factor method, SSD models, and quantitative structure–activity relationship models and risk quotient calculated by dividing PNEC by environmental exposure concentration were employed to set WQC.
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