This document provides an overview of US regulations governing hazardous materials for emergency responders. It aims to help understand the purposes and requirements of regulations from the US DOT, OSHA, CPSC, and EPA. Key points covered include definitions of hazardous materials and employers, packaging and transport standards, hazard identification requirements, and acts like CERCLA governing cleanup of contaminated sites. The full document contains additional details on these topics to help emergency responders understand and comply with relevant US regulations.