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For a large part of the last two weeks, Steven Brown, an air quality chemist with the National Oceanic and Atmospheric Administration, has soared over Colorado’s Front Range in a slow-flying Twin ...

Expect moderate levels of ground-level ozone, an urban pollutant that can affect those with sensitive respiratory systems, to be in the skies over the Houston metro area on Friday, according to Texas ...

Ozone, a pale blue gas with a characteristic after-lightning smell, is the main component of smog: the sometimes-foggy air that blankets Houston during the summer months. It is one of the city’s most ...

FORT CARSON, Colo. — As the weather warms up and an abundance of sunshine is welcomed, the Fort Carson community is encouraged to do its part to minimize peak ground-level ozone, which is an increased ...

You may have heard the Texas Commission on Environmental Quality or one of NBC 5's Weather Experts say that today or tomorrow is an Ozone Action Day. But what does that mean and what should you do ...

Milwaukee residents woke to another day of compromised air quality as dangerous ozone levels triggered widespread health alerts across southeastern Wisconsin. The air quality index soared above 100 ...

Austin this summer shattered its record for the most days with poor air quality threats in a year, but more frequent cold fronts in the fall will likely bring a reprieve for those struggling to ...

BOISE, Idaho — As wildfires continue through the hot and dry months of summer to fall, their smoke isn’t just clouding the skies, it’s also playing a complex role in the atmospheric chemistry. It can ...

NEW YORK (WABC) -- An Air Quality Alert has been re-issued by the National Weather Service for parts of the Tri-State area for Thursday, as ground-level ozone may approach or exceed unhealthy ...