When wildfire smoke drifts into the Methow Valley, it tends to stay, settling in the folds of the Cascade foothills like a ...

Trump administration's proposed rollbacks of federal clean air rules could result in 200,000 premature deaths and 10,000 ...

UPDATE: As of Tuesday morning, Marion County authorities are recommending evacuation in and around Otley due to burning sulfur. Residents are asked to contact Marion County Emergency Management for ...

The move will give state regulators more time to develop a plan to improve air quality in metro Denver and the region, and to ...

The strong winds that have affected the Imperial Valley in recent days have triggered pollution levels, especially in the Valley’s north end.

Air-quality officials are advising people in several Southern California cities to keep their doors and windows closed amid ...

Trump administration plans to destroy EPA science will leave the air we breathe and the water we drink more polluted ...

On Sunday at 3:07 p.m. the NWS San Diego CA reported an air quality alert in effect until Wednesday at noon for Coachella ...

Donald Trump's EPA says coal plants and other industrial polluters can ask to bypass provisions of the Clean Air Act by ...

A First Alert Weather Alert is in place until midnight tonight for gusty, dusty conditions and blowing sand leading to ...

Clean air has become one of America’s best investments, returning $10 for every $1 spent on regulations, by one estimate.

The EPA's decision on the Valley's ozone nonattainment issue could have big impacts on public health and the local economy.