Laboratory testing of listed vernal pool fairy shrimp and commercially available surrogate species to explore validity of extrapolation and provide data for interspecies correlation models. Toxicity tests will focus on priority pesticides that can inform Biological Evaluations for water quality criteria development for Idaho and Oregon in collaboration with US EPA Region 10. This dataset is associated with the following publication: Oliver, L., A. Brennan, K. Salinas, K. McCaffrey, J. Awkerman, M. Jankowski, B. Cunningham, K. Jones, and S. Raimondo. Toxicity of chlorpyrifos, diazinon, malathion, carbaryl and acrolein alone and in mixtures on the fairy shrimp Thamnocephalus platyurus. Integrated Environmental Assessment and Management. Allen Press, Inc., Lawrence, KS, USA, 22(5): 1635–1649, (2026).