Last week, the University of California, San Francisco’s (UCSF) Program on Reproductive Health and the Environment announced the publication of its “Recommendations for Addressing Potential Health Risks from Nanomaterials in California,” which provides recommendations for addressing potential health risks from nanomaterials to the Office of Environmental Health Hazard Assessment (OEHHA) and to the state of California. OEHHA contracted with UCSF to prepare the report, which provides an overview of nanotechnology materials, potential exposures, and human-health risks, and recommendations for addressing potential health hazards and risks from nanotechnology. Recommendations include those that can be implemented under the existing regulatory structure of OEHHA, such as establishing a publicly accessible clearinghouse and inventory of nanomaterial sources and products. The report also includes recommendations that are outside the scope of OEHHA, many of which may require legislative changes, such as requiring testing of release and exposure potential for nanomaterials in existing and new consumer products, and implementing a labeling system that requires labeling of products that contain nanomaterials. According to UCSF, the recommendations primarily focus on requiring information on potential exposures and health hazards for nanomaterials used in the marketplace.