Protect Water Quality

N3B monitors groundwater for contamination and controls the migration of contaminated storm water linked to historical Los Alamos National Laboratory (LANL) operations. N3B is also treating a groundwater plume that contains elevated levels of hexavalent chromium and investigating a plume of Royal Demolition Explosives (RDX). Both plumes are in the regional aquifer beneath LANL.

Surface and Storm Water

Monitor surface water and storm water runoff for contaminants linked to historical LANL operations while minimizing migration of potentially contaminated water through engineered controls.

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Chromium

Control migration of the hexavalent chromium plume and reduce the plume footprint, while identifying a final remedy.

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Royal Demolition Explosive

Ensure RDX groundwater contamination from past LANL operations does not threaten human and environmental health.

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Copper Water Quality Criteria

Obtain New Mexico Water Quality Control Commission approval for determining copper water quality criteria utilizing U.S. Environmental Protection Agency 2007 biotic ligand model.

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Groundwater

Monitor groundwater to ensure water leaving LANL does not pose an unacceptable impact to human or ecological health.

Resource Library

Chromium Fact Sheet

Copper Fact Sheet

RDX Fact Sheet

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Latest News

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Los Alamos Legacy Cleanup Contractor Achieving Banner Year for Waste Shipments to Waste Isolation Pilot Plant

September 14, 2026 - Newport News Nuclear BWXT-Los Alamos LLC waste operations crews load U.S. Nuclear Regulatory Commission-approved transportation casks, which are used to...

New Well to Further Characterization of Hexavalent Chromium Plume at Los Alamos

September 1, 2026 - LOS ALAMOS, N.M. — The U.S. Department of Energy (DOE) Environmental Management Los Alamos Field Office (EM-LA) continues work to further characterization and...

Walsh Tours Los Alamos Legacy Cleanup, Views Waste Shipment Progress

August 4, 2026 - Assistant Secretary of Environmental Management Tim Walsh, left, meets Newport News Nuclear BWXT-Los Alamos LLC waste operations crew members supporting...