Supplemental Environmental Impact Statement

Enhanced Plutonium Facility Utilization

The Department of Energy’s National Nuclear Security Administration (NNSA) published a Notice of Intent in the Federal Register on January 13, 2025, to prepare a Supplemental Environmental Impact Statement (SEIS) that will evaluate enhanced plutonium facility utilization at Lawrence Livermore National Laboratory’s Plutonium Facility. The SEIS will include an analysis of potential environmental impacts of a security upgrade from Category III to Category II and changes to programmatic operations in the facility.

Additional information about the SEIS and the ongoing formal public comment process are available on NNSA’s NEPA Reading Room website under Open For Public Comment.

Go to the NNSA Reading Room

An aerial view of Lawrence Livermore National Laboratory's site 200.