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