Despite thick smoke in the sky today in southern Colorado, air quality alerts haven't been issued - instead they've been in the western slope. In fact - sometimes invisible compounds pose more risk.

The company TransGas has a proposal on the table to build two off grid power plants to supply electricity to data centers. One would be located on 22 Mine Road ...

While the smoke is worst along the Western Slope where the fires are burning, levels are also fluctuating on the Front Range.

High school coaches and administrators across Minnesota have been asked to be aware of air-quality levels as athletes return ...

While not everyone will be impacted by air quality on Wednesday, those who have been sensitive to poor air quality this ...

Heat and poor air quality are becoming chronic problems. Here’s what Boston is doing to adapt. But first, here’s what else is ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

The City Council dropped a $202 million effort that would have expanded the city’s cooling centers to also accommodate people ...