The European Union (EU) Observatory for Nanomaterials (EUON) provides information on nanomaterials to a wide audience on subjects including safety, innovation, and research. It also covers the existing EU legislation on nanomaterials and the presence and uses of specific substances on the EU market. EUON is currently conducting a survey to allow stakeholders to express their views on how EUON is performing and how it could be developed to meet their needs better. EUON is funded by the European Commission (EC). It is hosted and maintained by the European Chemicals Agency (ECHA).