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
Los Alamos Stormwater Sampling Season is Underway
June 4, 2024 - A Newport News Nuclear BWXT Los Alamos Environmental Remediation group member collects stormwater samples in Los Alamos Canyon. LOS ALAMOS,...
In Pictures: EM’s Avery Views Los Alamos Legacy Waste Disposition Progress
May 21, 2024 - U.S. Department of Energy Office of Environmental Management (EM) Principal Deputy Assistant Secretary Jeff Avery, left, visits Technical Area 54,...
N3B demonstrates new system to enhance analysis of waste drums
May 21, 2024 - LOS ALAMOS, N.M.— A system developed in the United Kingdom to more accurately analyze the contents of radioactive waste drums...