The Sacramento region’s air quality reached “unhealthy for sensitive groups” level on Thursday morning, according to IQAir.

It didn't take long for air quality to plummet across the Wasatch Front and surrounding regions from the latest inversion ...

Dust and diesel particles linger in the Valley air grab onto Valley fog which acts as a sponge. That can result in dangerous air quality. Fog only adding to that danger, trapping man-made pollutants ...