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Arizona Regulators Are Raising Contaminant Limits for a Uranium Mine With an Arsenic Problem
A monitoring well at the site of a uranium mine operating in a national monument nine miles from the Grand Canyon’s south rim has been detecting rising arsenic levels since 2025. Four times, those arsenic levels exceeded the Arizona well’s permitted alert levels. Now, the Arizona Department of Environmental Quality (ADEQ) is approving an application […]
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