Chicago Air Quality Reaches Unhealthy for Sensitive Groups Level (AQI 107)

Current Air Quality

On February 15, 2026, the reporting area of Chicago, IL, recorded an Air Quality Index (AQI) of 107. The primary pollutant of concern is fine particulate matter (PM2.5). This reading falls into the “Unhealthy for Sensitive Groups” category.

What This Means

According to standard EPA guidance, an AQI level between 101 and 150 is classified 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.

Who Should Take Precautions

Groups at increased risk from this level of PM2.5 pollution include:

• People with heart or lung disease
• Older adults
• Children and teenagers

What You Should Do

Members of sensitive groups should reduce prolonged or heavy exertion outdoors. It is recommended to take more breaks and engage in less intense outdoor activities. The general public is not significantly affected at this AQI level but should remain informed of changing conditions.

Source

Data provided by EPA AirNow.