The just released WHO Environmental Noise Guidelines for the European Region provide strong evidence that noise is one of the top environmental hazards to both physical and mental health and well-being in the European Region. Officially launched to countries and stakeholders in Basel, Switzerland on 10 October 2018, the document identifies levels at which noise has significant health impacts and recommends actions to reduce exposure. For the first time, a comprehensive and rigorous methodological framework was applied to develop the recommendations.