State's raising of arsenic limits at mine well 'affects every Arizonan,' tribe says

The Arizona Department of Environmental Quality has agreed to revise groundwater arsenic limits for a monitoring well at the Pinyon Plain uranium mine south of the Grand Canyon, concluding that higher arsenic levels in the well were naturally occurring.

The Havasupai Tribe raised concerns about the proposal, sought by mine operator Energy Fuels Inc., to allow higher levels of arsenic in a groundwater monitoring well near the mine, warning that the changes threaten Havasu Creek, the tribe's sole water source.

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