The European Union (EU) Observatory for Nanomaterials (EUON) is conducting a web satisfaction survey. EUON provides information on the safety, innovation, research, and uses of nanomaterials on the EU market. It is intended for stakeholders developing policies in the area, consumers, industry representatives, and non-governmental organizations. EUON is funded by the European Commission (EC) and hosted and maintained by the European Chemicals Agency (ECHA). Information from the survey will be used to make improvements to the existing website and prioritize areas of development in the future. The survey should take only five minutes, and responses are completely anonymous.