Addressing Los Alamos legacy contamination and waste
Learn how we safely and effectively carry out the Los Alamos National Laboratory legacy cleanup mission.
Who we are
We are responsible for carrying out the 10-year $2.1 billion LANL legacy cleanup contract for the U.S. Department of Energy Environmental Management Field Office.
N3B is committed to a safe, effective, efficient and compliant cleanup process.
Our employees are proud to call Northern New Mexico home and to continue to advance this important mission.
What’s New?
Los Alamos Legacy Cleanup Contractor Attracting Best and Brightest Talent READ MORE >
Environmental Management Cleanup Forum 3/18/2026 READ MORE >
N3B Releases 2025 Community Commitment Annual Report READ MORE >
Updates on Hexavalent Chromium Campaign READ MORE >
Environmental Management Cleanup Forum 12/17/2025 READ MORE >
What we do
We are responsible for protecting water supplies, cleaning up contaminated soil and disposing of remaining inventories of legacy waste.
Land
Water
Waste
Work with us
We’re a diverse team of problem-solvers and innovators, united by our commitment to N3B’s vital mission of legacy waste cleanup and community enhancement.
Latest News
EM “Drills” Down on Legacy Waste at Los Alamos
September 19, 2024 - Newport News Nuclear BWXT Los Alamos waste processing operators repackage materials from a legacy waste container to a new lined...
N3B Bids Farewell to Three Summer Interns Who Made Significant Contributions
August 29, 2024 - LOS ALAMOS, N.M. – Newport News Nuclear BWXT Los Alamos (N3B), the legacy cleanup contractor at the Los Alamos National...
Community, Workforce Engagement Main Focus for Top EM Official
July 30, 2024 -