Conclusions & Next Steps

This fact sheet presents the approach for data gathering, data selection, and data aggregation to be used for the derivation of the PNEC value for the freshwater compartment based on the statistical extrapolation method using the SSD approach. Because the ecotoxicity of nickel is mitigated by the physico-chemistry of the freshwaters (pH, hardness, DOC) it is highly recommended to normalize the ecotoxicity data for PNEC derivation using the available bioavailability models as described in the Fact Sheet 4.