Conclusions & Next Steps in RA

The ecotoxicity of Ni is largely affected by the physico-chemistry of the freshwater (pH, hardness, DOC); hence, it is highly recommended to normalize the ecotoxicity data for HC5/PNEC derivation using the available bioavailability models. This fact sheet presents the background information on the developed/validated BLMs and how this information can be used to estimate site-specific bioavailable PNEC values. The collection of water chemistry data such as pH, hardness, and DOC allow the calculation of different bioavailable PNEC values which enables a more accurate, site-specific risk characterization to be conducted.