It’s no secret: The air quality is bad in Colorado this summer.  

Thus far, the state has issued 59 Ozone Action Day alerts since May 31—the most in a single year since record-keeping began a decade ago. At least one day in August, Denver boasted the worst air quality of any major city in the world.

In 2020, Colorado battled the four largest wildfires in its history, leaving residents anxious for another intense wildfire season this year. 

But now, their aftermath is creating new problems with flash flooding and mudslides.

School may be out for summer, but cleaner indoor air may be here to stay in some Colorado classrooms.

Engineers at CU Boulder have installed hundreds of air quality monitors in K-12 classrooms across Denver and Boulder.


Professor Sherri Cook is researching solutions for better wastewater treatment and reuse.

She has been honored by the National Science Foundation with a CAREER Award, a five-year, $510,000 grant to study water treatment technologies and build models to help local governments and water operators improve their infrastructure and water quality.

Irrigated agriculture is the planet's largest consumer of freshwater and ultimately produces more than 40% of food worldwide. Yet the exact amounts of water actually being used in irrigation remains largely unknown.

Answering that question would provide insight into the global water balance and is part of a new project by Assistant Professor Ben Livneh.