Arch Coal’s Emissions Unenforced as Colorado Cites Uncertainty

Arch Coal Inc.’s West Elk Mine in Colorado is emitting volatile organic compounds at levels violating the state’s air quality standards, according to state inspection reports examined by Bloomberg Environment.

The underground coal mine in sparsely populated Gunnison County releases tons of the ozone-forming compounds each year along with methane, according to the reports. VOCs react with sunlight to create ground-level ozone. The state says it’s difficult to estimate the emissions, while environmentalists say the excessive levels warrant enforcement.

Mining companies such as Peabody Energy and Alpha Natural Resources are closely watching what happens at West Elk, since ...