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Thousands of mines with toxic water under the West

DENVER – Beneath the western United States lie thousands of old mining tunnels filled with the same toxic stew that spilled into a Colorado river last week, turning it into a nauseating yell...

Bennet, Gardner tell EPA to set an example for Animas River cleanup

Colorado senators visit Durango to assess damage

Mine pollution changed river chemistry

Early pH levels show water is as acidic as coffee

What’s causing the hot spot?

At least 75 researchers study methane leaks in Four Corners

Frackers average at least two violations a day

Environmentalists use online records in Colorado and 2 other states

Is Silverton ready for a cleanup?

As mines continue to leach pollutants, some residents reconsider Superfund

Are we breathing clean mountain air?

Four Corners plants ID’d as biggest polluters