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
Community meeting Oct. 26 to discuss legacy environmental cleanup at LANL
October 24, 2022 - LOS ALAMOS, N.M.—The Department of Energy’s Environmental Management Los Alamos Field Office and its legacy environmental cleanup contractor, N3B Los...
N3B exceeds legacy waste shipment goals for FY22
October 5, 2022 - LOS ALAMOS, N.M. — N3B Los Alamos finished fiscal year 2022 (FY22) by exceeding the U.S. Department of Energy’s (DOE)...
N3B Los Alamos awards millions in subcontracts to support soil remediation at LANL
September 20, 2022 - LOS ALAMOS, N.M. – N3B Los Alamos recently awarded subcontracts to three small environmental firms that will assist in accelerating...