The Environmental Protection Agency proposed new drinking water standards this week for PFAS — the increasingly pervasive toxic chemicals that are highly prevalent in Colorado.

The humidity of where you live can play a big role in how long airborne viruses can survive. CU Boulder researchers found coronavirus particles released in a low-humidity environment remained infectious for twice as long than those in a more humid chamber.

As legislative sessions wind down, lawmakers in New Mexico and Colorado may impose waiting periods before firearm purchases, while Wyoming and Idaho go in a different direction.

As of March 7, Colorado has had 206 wild bird samples that have tested positive for the H5N1 virus, the most in the region.

Lawmakers from Wyoming and New Mexico were among those who called for tribal economic sovereignty, while tribal officials shared their experiences and suggestions.

A new report shows the overrepresentation of Native Americans and Alaska Natives in state prison systems, and some of the greatest disparities are in the Mountain West.

Officials across the Mountain West are looking for ways to recruit and retain more teachers in local schools. While salary changes are a large part of discussions, low pay isn’t the only thing contributing to this critical labor shortage.

The National Park Service released visitation statistics this week showing that five of the top 15 most-visited parks in 2022 are in the Mountain West. Big crowds can put pressure on national parks, though.

Arizona, California and Nevada agree with pausing releases from Flaming Gorge Reservoir, but urge other states and the Bureau of Reclamation to keep an eye on runoff.

As methane emissions from the oil and gas sector increase worldwide, a new report shows that existing technologies could make big emissions reductions at a cost that's a drop in the bucket for Big Oil.