Toxic Plume Spreads to Native Land

A vast underground plume of hexavalent chromium, a toxic metal linked to cancer, has spread onto the ancestral lands of the Pueblo de San Ildefonso in New Mexico. This contamination stems from decades of flushed coolant from a power plant at the Los Alamos National Laboratory, where it was used to prevent pipe rust. The plume's recent expansion onto tribal territory has heightened concerns, as contamination levels now surpass state groundwater standards.

New Mexico Environment Department officials have stated that the U.S. Department of Energy's measures to contain the plume have been insufficient. Despite assurances that public drinking water remains safe for now, the migration of the chromium is ongoing, with nearly 20 years of monitoring and treatment efforts failing to fully control its spread. The Pueblo's governor has vowed to hold responsible parties accountable for the contamination.

Efforts to pump and treat the contaminated water have faced setbacks, including a halt in 2023 due to discovered increases in chromium levels. While partial treatment has resumed, officials argue that the Department of Energy has not prioritized a sufficiently aggressive remediation strategy. The situation highlights a broader pattern of environmental impact from federal facilities in the region.