State health officials on Monday warned that ground-level ozone is expected to be elevated from Denver southward to Colorado Springs and Pueblo Monday afternoon and evening, including the adjacent foothills and the high plains. People with asthma, older adults, children and others with respiratory conditions were urged to limit prolonged or heavy outdoor exercise and move strenuous activity indoors when possible.
The advisory was posted by CDPHE, calling out elevated ozone across the I‑25 corridor and nearby plains. According to CDPHE, monitors showed variable ozone through Monday morning, with some sites reaching AQI levels in the Moderate range. The advisory specifically named Denver, Colorado Springs, and Pueblo as areas likely to see higher ozone this afternoon and evening.
National Weather Service Alert
The National Weather Service issued an Air Quality Alert that lines up with the state advisory, warning that downward mixing or intrusion of ozone from higher altitudes could push surface concentrations into the Unhealthy for Sensitive Groups range across parts of the Front Range…..