Saturday Air Quality Forecast For Metro Denver, Boulder

Pollution warnings in metro Denver and Boulder have been extended through Saturday. Smoke is continuing to flow into the region from in-state and out-of-state wildfires.

"Air quality conditions are expected to gradually improve across the Front Range on Saturday," a health advisory read.

"However, wildfire smoke could increase at times due to transport from both in-state and out-of-state wildfires."

The worst air quality is expected along the I-25 corridor from Denver to Fort Collins, according to the Colorado Department of Public Health and Environment.

Most of Denver's metro area is under the 'unhealthy for sensitive groups' air quality rating, but regions north of Denver have reached the 'unhealthy' category, which means everyone is affected by the poor air quality, public health officials said.

Visibility along the Front Range is expected to be 'poor' or 'moderate' Saturday.

Don’t miss the latest news updates in Colorado. Sign up for free Patch news alerts and newsletters for what you need to know daily.

Ozone concentrations are expected to be in the 'good to moderate range' Saturday, so unusually sensitive people should consider reducing prolonged or heavy outdoor exertion. Fine particulate matter concentrations are also expected to be in the 'unhealthy for sensitive groups' or 'unhealthy' range Saturday.

Carbon monoxide and nitrogen dioxide levels are expected to remain in the 'good' category Saturday, health officials said.

Smoke continues to flow into the Front Range from the Middle Fork fire near Steamboat Springs and the massive Cameron Peak wildfire in Larimer County.

>> Read the full air quality advisory here.