Office of Environmental Management | Department of Energy Official websites use .gov .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS lock ) or means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Office of Environmental Management Explore: Acquisition Program & Project Management Science & Technology Areas of Focus Deactivation & Decommissioning (D&D) Deactivation and Decommissioning (D&D) is the process of taking an active/excess/abandoned facility to a final disposition end state. about Deactivation & Decommissioning (D&D) September 25, 2025 Excess Materials and Radioactive Waste Management Waste and materials disposition plays a vital role in the cleanup of radioactive waste. about Excess Materials and Radioactive Waste Management February 17, 2026 Packaging and Transportation DOE safely transports radioactive, hazardous, and non-hazardous materials. about Packaging and Transportation March 5, 2026 Soil & Groundwater Remediation One of the largest groundwater and soil remediation efforts in the world. about Soil & Groundwater Remediation October 16, 2025 Highlights 1st Vitrified Tank Waste Disposed Pivotal Milestone Met about 1st Vitrified Tank Waste Disposed April 8, 2026 Partnership Ensures Affordable Energy, Powers AI Future at Portsmouth Site Powers AI Data Center about Partnership Ensures Affordable Energy, Powers AI Future at Portsmouth Site March 24, 2026 Waste Management Symposia Tim Walsh's Bold New Vision for EM about Waste Management Symposia March 17, 2026 Restart Uranium Recovery Strengthening America’s Nuclear Energy Independence about Restart Uranium Recovery February 4, 2026 View More Cleanup Sites The U.S. Department of Energy's Office of Environmental Management (EM) mission is to address the environmental legacy resulting from decades of nuclear weapons production and government-sponsored nuclear energy research. This legacy includes some of the world's most dangerous radioactive sites with large amounts of radioactive wastes, spent nuclear fuel, excess plutonium and uranium, thousands of contaminated facilities, and contaminated soil and groundwater. Explore the map below to learn more about the remaining cleanup sites across the country and the Completed Cleanup Sites webpage for a list of completions. Latest News Department of Energy Seeks to Partner with Private Sector for Used Nuclear Fuel Recycling April 22, 2026 PPPO's Cylinder Management Helps Shape Nuclear Renaissance April 21, 2026 Reducing Footprints, Increasing Opportunities at Savannah River Site April 21, 2026 Supporting Future National Security Missions on Legacy Ground at Oak Ridge April 21, 2026 View All Subscribe To Email Updates To receive the latest news and updates about the Office of Environmental Management, submit your e-mail address. Social Media