The US Department of Transportation (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) has released the 2020 edition of its Emergency Response Guidebook (ERG). This edition provides first responders with the revised and updated go to manual that offers guidance on what to do in that first critical 30 minutes of a HAZMAT response. The revised ERG contains an indexed list of dangerous goods, their associated ID numbers, and general hazards that they might pose in a transportation accident. It also provides the recommended safety precautions when responding to a event with HAZMAT. This guidebook is available to all public safety agencies in all States and territories for free, through designated state Emergency Management coordination offices. It is also available as a free mobile app. For additional information visit www.phmsa.dot.gov.