The Consumer Product Safety Commission (CPSC) is sponsoring a July 7-8, 2015, workshop, co-sponsored by the National Nanotechnology Initiative (NNI), entitled “Quantifying Exposure to Engineered Nanomaterials from Manufactured Products — Addressing Environmental, Health, and Safety Implications.” This is a technical workshop to determine the state of the science and the tools and methods available to characterize and quantify exposure to engineered nanomaterials from consumer products. The U.S. federal regulatory agencies participating in the NNI have put forth a risk-based regulatory agenda regarding engineered nanomaterials. Because risk is calculated based on both hazard and exposure, this approach requires exposure data. A main goal of this approach is to bridge toxicology with exposure science. Registration is on a first-come, first-served basis and will be limited to 120 people.