Millions of tons of coal ash are buried underground in Colorado, seeping toxic chemicals into groundwater
- Posted on June 29, 2025
- By The Denver Post
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Millions of tons of coal ash are buried underground in Colorado, seeping toxic chemicals into groundwater
When Xcel Energy stopped burning coal at its Valmont Power Station in 2017, it left 1.6 million tons of toxic coal ash on the property — and now that waste is leaching hazardous metals.
