Category: LANL Chromium Plume

Los Alamos National Lab (LANL) Town Hall December 3rd, 2025 – Thoughts from Nuclear Watch New Mexico:

Sophia MerynBudget, DOE, Environmental Impact, LANL Chromium Plume, Los Alamos Nat'l Lab., Modernization, New Mexico, Nuclear Weapons, Pit Production at LANL, Plutonium Pit Production, Tritium

The LANL Director mentioned Non-proliferation is a big part of their work. However, the Nuclear Nonproliferation program budget is a mere 6.5% of the total Lab budget (Nuclear Weapons is 84%, with a Billion dollar increase for FY26). https://nukewatch.org/wp-content/uploads/2025/09/FY26-Lab-Table-spreadsheets-Chart-1.pdf Nuclear Nonproliferation is a valuable program that LANL does well, and its funding should not be cut to provide more money for nuclear weapons production (literally the opposite of nonproliferation). The Nuclear Nonproliferation budget should be increased, especially if the Lab director agrees on its importance. NukeWatch NM is entirely supportive of LANL’s Sealed Sources program, which serves as the nation’s lead for collecting potentially dangerous radioactive materials that are no longer needed, securing them, and ensuring they don’t fall into the wrong hands, protecting communities and enhancing security.

On the discussion of AI missions at the lab:

The lab is partnering with NVIDIA for their hardware and ChatGPT/Open AI for their models. “The goal is to harness the power of the next evolution of high performance computing and apply it to our national security science and technology. Big development on this front is the “genesis” mission…” and in an answer to a question, want to “use artificial intelligence to [for example] help us develop the molecules that could deliver a therapeutic isotope to a cancer cell with high specificity so that when that undergoes radioactive decay the decay products basically kill the cancer cell but no surrounding tissue”

Again, the lab’s nuclear weapons budget ate up almost all else this year – how does the lab propose to work on this kind of work when its’ science budget is less than 1%? How will this advancement of AI be applied to our national security science and technology in terms of nuclear weapons? NukeWatch has serious concerns and questions regarding the tangible risks associated with integrating commercial AI infrastructure to be with active national security and nuclear defense programs. Beyond this, a $1.25 billion advanced computing campus is planned in Michigan to support far-away Los Alamos Lab in high-performance computing and AI research.
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Lab Chromium Contamination Confirmed on San Ildefonso Pueblo Land

Sophia MerynStickyChromium, Environmental Impact, Environmental Justice, LANL Chromium Plume, Los Alamos Nat'l Lab., Nuclear Waste

Comprehensive Cleanup Needed Instead of More Nuclear Weapons

The New Mexico Environment Department has announced:

“A toxic chromium plume from Los Alamos National Laboratory has spread beyond Lab boundaries onto Pueblo de San Ildefonso land for the first time, with contamination exceeding state groundwater standards… These new results are conclusive evidence that the U.S. Department of Energy’s efforts to contain the chromium plume have been inadequate.”

In reality, chromium groundwater contamination probably migrated beyond the LANL/San Ildefonso Pueblo boundary long ago, with past Lab maps of the plume “magically’ stopping at the border. In the past, tribal leadership has commented that it was fortunate that the contamination stopped there, but that any future indications of groundwater contamination on Pueblo land could have serious consequences. The San Ildefonso Pueblo is a sovereign Native American tribal government.

As late as the late 1990s the Lab was falsely claiming that groundwater contamination was impossible because underlying volcanic tuff is “impermeable.” [1] This ignored the obvious fact that the Parajito Plateau is heavily seismically fractured, providing ready pathways for contaminant migration to deep groundwater. By 2005 even LANL acknowledged that continuing increasing contamination of the regional aquifer is inevitable.[2] Some 300,000 northern New Mexicans rely upon the aquifer for safe drinking water. The potential serious human health effects (including cancer) caused by chromium contamination was the subject of the popular movie Erin Brockovich.

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NukeWatch Los Alamos Lab Site-Wide EIS Workshop – February 6, 2025

Sophia MerynArchbishop, Downwinders, Environmental Impact, Environmental Justice, High-level Radioactive Waste, LANL Chromium Plume, LANL Cleanup, Los Alamos Nat'l Lab., Modernization, NEPA, New Mexico, NMED, NNSA, Nuclear Policy, Nuclear Safety, Nuclear Waste, Nuclear Weapons, Plutonium Pit Production, Savannah River Site, Tritium, WIPP

Full Video Recording: NukeWatch Los Alamos Lab Site-Wide EIS Workshop

NukeWatch Presentation: Los Alamos Lab Site-Wide EIS Workshop
NukeWatch Los Alamos Lab Site-Wide EIS Workshop

Independent Review of Chromium Groundwater Contamination Fails to Make Final Cleanup Recommendation

Sophia MerynChromium, Environmental Impact, LANL Chromium Plume, LANL Cleanup, Los Alamos Nat'l Lab., New Mexico

After 20 Years Los Alamos Lab Still Doesn’t Know Size of Plume
At Present Rate Cleanup Will Take More Than a Century

On December 30, 2024, in the middle of the holiday season, the Los Alamos National Laboratory (LANL) posted the report Independent Review of the Chromium Interim Measures Remediation System to its largely unknown Legacy Cleanup Electronic Public Reading Room. This report attempts to address the Lab’s extensive contamination of the region’s deep groundwater aquifer by a large plume of hexavalent chromium, whose potentially serious human health effects (including cancer) was the subject of the popular movie Erin Brockovich.

LANL’s chromium contamination plume is at least one mile long, a half mile wide and 100 feet thick.[1] It is commonly regarded as the Lab’s most serious environmental threat. One drinking water supply well for Los Alamos County has been shut down because of the plume. Lab maps of the contamination depict it as abruptly stopping at the border of San Ildefonso Pueblo, which is highly unlikely.

The bottom line of the newly released chromium report is:

“…at this time the plume is not sufficiently characterized to design a final remedy… data gaps and uncertainties need to be addressed before committing to an alternative or final remedy.”

This is a full two decades after the chromium plume was first reported.

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New Mexico: America’s Nuclear Colony

Sophia MerynDOE, Environmental Impact, LANL Chromium Plume, LANL Cleanup, New Mexico, Nuclear Waste, Nuclear Weapons

Money doesn’t talk, it swears. (Bob Dylan)

Quick Facts

Nuclear New Mexico

• DOE FY 2024 budget in NM is $10 billion (double next state).
– 75% core nuclear weapons research and production programs
– 28% life extended and new-design nuclear warheads ($2.65B)
– 20% expanded nuclear weapons production ($2 billion)
– $1.75B expanded plutonium “pit” bomb core production
– 5% for dumping radioactive bomb wastes (WIPP $484 million)
• Expanding nuclear weapons programs sold as jobs, jobs, jobs
• Los Alamos County (LAC) 70.6% non-Hispanic Caucasian
• LAC is 11th richest county in USA, most millionaires per capita
• Los Alamos County median household income $123,677
• Los Alamos County per capita income $64,521
• Los Alamos County persons in poverty 3.7%
• Los Alamos County has least children living in poverty in USA
• Los Alamos County rated best county to live in in USA
• Historically LAC schools subsidized added $8 million/yr from DOE
• LAC receives >$50 million in annual state gross receipts taxes
• Dept of Energy renewable spending in NM is 0.5% of $10B budget
• Indigenous and Hispanic lands unjustly seized for LANL
• World’s first atomic bomb detonated at Trinity Test
• 75 years still no govt tally of sick Navajo/Laguna uranium miners
• At least 8,280 sick Los Alamos and Sandia Labs workers
• Major hexavalent chromium groundwater contamination at LANL
• LANL plans to “cap and cover” and leave >200,000 yd3 of waste
• USA’s largest repository of warheads 2 miles south of ABQ airport
• Nation’s only plutonium “pit” bomb core production site at LANL
• Nation’s only dump for bomb wastes at Waste Isolation Pilot Plant
• NM targeted for all of nation’s lethal radioactive high-level wastes

New Mexico

• NM’s entire FY24 state operating budget is 6% less ($9.4 billion).
– 54% public education K-12 and higher
– 34% public health and safety

• NM per capita income falls from 32nd (1959) to 47th (2022)
• New Mexico 50% Hispanic, 11.2% Native American
• New Mexico 4th poorest state
• Median household income $54,020
• Average per capita income $29,624
• New Mexicans in poverty 18.4% (3rd highest in USA)
• 30% of New Mexican children live in poverty (highest rate in USA).
• New Mexico rated worst in well-being of children
• New Mexico is dead last in quality of public education
• Six surrounding county govts suffer net economic loss from LANL
• New Mexico has very abundant renewable energy resources
• DOE transfers excess land to white, wealthy Los Alamos County
• Generational cancers, Downwinders never compensated
• Chronically delayed remediation of 260 uranium mines and 7 mills

• NM facing decreasing water resources and increasing wildfires
• Lab commonly hires away senior NM Environment Dept officials
• >$5B for plutonium facilities, more than all NM schools & hospitals
• DOE threatens to sue NM over new WIPP state permit conditions
• Federal Nuclear Reg. Comm. grants license despite state opposition

New Mexico: America’s Nuclear Colony

New Mexico is the birthplace place of nuclear weapons. The “Land of Enchantment” has always been the single most important state within the U.S. nuclear weapons complex. The Department of Energy (DOE) will spend $10 billion in NM in FY 2024, 6% more than the operating budget of the entire state government.

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Nuclear Watch New Mexico’s Follow-up to News about the Chromium Plume: Santa Fe New Mexican article, “San Ildefonso governor says halt of plume cleanup will lead to spread onto pueblo”

Sophia MerynChromium, Environmental Impact, LANL Chromium Plume, Los Alamos Nat'l Lab., Nuclear Safety

“Nuclear Watch New Mexico believes that it is past time that this dangerous contaminant is cleaned up at the source.

Extracted treated groundwater should be pumped or trucked uphill to flush out the remaining 90% of the chromium so that it can be decisively dealt with instead of with only marginally effective “pump and treat” for a few centuries…”

By Jay Coghlan

A long road to remediation for hexavalent chromium plume near Los AlamosThe real shame is how ineffective Lab cleanup of the hexavalent chromium plume is. First, even after 18 years, LANL and DOE still don’t know the boundaries of the plume, all the while claiming it’s not on San Ildefonso Pueblo Land (maybe LANL should deprioritize expanded nuclear weapons production and focus on that). Second, this is our common “sole source” (EPA special designation) aquifer that is one of the primary sources of drinking water for the cities of Santa Fe, Española, and Los Alamos, eleven Pueblos and all of the Española Basin’s rural areas. Third, hex chromium is the carcinogen made notorious in the popular movie Erin Brockovich. Fourth, it is estimated that 160,000 pounds of chromium were released up until 1972, but only 10% (i.e. ~16,000 pounds) has been recovered through extraction and treatment. When the head of DOE Environmental Management Los Alamos Office was asked where’s the rest of the chromium, Michael Mikolanis demurred and said that he would have to get back on that question.

San Ildefonso governor says halt of plume cleanup will lead to spread onto pueblo

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