Chicago Air Quality Reaches Unhealthy for Sensitive Groups Level (AQI 110)
On February 14, 2026, air quality in Chicago, IL reached an AQI of 110 for PM2.5, placing the area in the Unhealthy for Sensitive Groups category.
Current Air Quality
In Chicago, IL, the air quality index (AQI) was recorded at 110 on February 14, 2026. The primary pollutant of concern is fine particulate matter (PM2.5), which has reached the “Unhealthy for Sensitive Groups” category.
What This Means
An AQI level between 101 and 150 is classified by the EPA as Unhealthy for Sensitive Groups. At this level, members of sensitive groups may experience health effects, though the general public is less likely to be affected by the current air conditions.
Who Should Take Precautions
Groups at higher risk include people with heart or lung disease, older adults, children, and teenagers. These individuals are more sensitive to the effects of fine particulate matter (PM2.5) and should monitor their activity levels.
What You Should Do
People in sensitive groups should reduce prolonged or heavy exertion outdoors. It is recommended to take more breaks and engage in less intense outdoor activities. Watch for symptoms such as coughing or shortness of breath. The general public is generally not affected at this AQI level and can continue normal outdoor activities.
Source
Data provided by EPA AirNow.
Source: EPA Official Notice