Registration is now available for the National Nanotechnology Initiative’s (NNI) June 11, 2019, webinar on “Practical Applications of 15 Years of NanoEHS Research: Measurements of Potential Ecotoxicological Risk.” The speaker will be Dr. Elijah Petersen, National Institute of Standards and Technology (NIST), and Dr. Treye Thomas, U.S. Consumer Product Safety Commission (CPSC) and NNI Coordinator for Environmental, Health, and Safety (EHS) Research, will moderate. The webinar will spotlight the progress in addressing the measurement challenges posed by the unique behaviors of engineered nanomaterials. NNI states that modifications to typical toxicity assays are needed to account for these behaviors, avoid artifacts, and ensure accurate measurements. Using several practical examples, Dr. Petersen will describe the different artifacts that can occur during measurements and the potential control experiments to assess these artifacts. Dr. Petersen will also discuss the development of an Organization for Economic Cooperation and Development (OECD) guidance document on aquatic and sediment toxicological testing of nanomaterials. According to NNI, the webinar will underscore the role of the collaborative U.S.-European Union (EU) Communities of Research in sharing information and best practices for measuring and studying nanomaterials in ecologically relevant scenarios. Webinar viewers will be able to submit questions for the panelists to answer during the question and answer period. Submitted questions may be posted on the NNI website.