Illinois Air Quality Index & Realtime Air Pollution
Primary Air Pollutants Illinois
Hourly forecast Illinois
Health Recommendations for Illinois Residents
Based on current air quality: Moderate · AQI 73
UV Index
6.95
High
High UV levels — apply sunscreen and limit direct sun exposure.
Wind
11.2 km/h
Light breeze — leaves rustling gently.
Historical AQI Data Illinois
United States Major Cities AQI Overview
New York
44
Temp.
25.7°C
Hum.
42%
Los Angeles
64
Temp.
24.5°C
Hum.
71%
Chicago
138
Temp.
22.5°C
Hum.
70%
Houston
67
Temp.
30.4°C
Hum.
71%
Phoenix
35
Temp.
34.5°C
Hum.
40%
San Francisco
17
Temp.
14.6°C
Hum.
91%
Seattle
44
Temp.
16°C
Hum.
86%
Denver
41
Temp.
30.1°C
Hum.
27%
Philadelphia
52
Temp.
25.4°C
Hum.
54%
San Antonio
62
Temp.
28.4°C
Hum.
77%
Dallas
76
Temp.
32.7°C
Hum.
63%
Atlanta
59
Temp.
32.1°C
Hum.
53%
Most Polluted Cities by AQI United States
Explore live air quality data for the most polluted cities in the country.
| Rank | City | AQI | AQI Status | Standard Value | Notify |
|---|---|---|---|---|---|
| 1 | Green Bay, Wisconsin | 159 | Unhealthy | 14x above Standard | |
| 2 | Milwaukee, Wisconsin | 158 | Unhealthy | 14x above Standard | |
| 3 | Madison, Wisconsin | 153 | Unhealthy | 12x above Standard | |
| 4 | Rockford, Illinois | 140 | Poor | 10x above Standard | |
| 5 | Grand Rapids, Michigan | 135 | Poor | 10x above Standard | |
| 6 | Toledo, Ohio | 128 | Poor | 9x above Standard | |
| 7 | Ann Arbor, Michigan | 121 | Poor | 9x above Standard | |
| 8 | Chicago, Illinois | 121 | Poor | 9x above Standard | |
| 9 | Detroit, Michigan | 114 | Poor | 8x above Standard | |
| 10 | Lansing, Michigan | 113 | Poor | 8x above Standard |
Health Advice For People Living in Illinois
per day
Breathing the air in this location is equivalent to smoking 1.0 cigarettes a day.
Prevent Health Problems: Understand Your Risks
Illinois · Current air quality: Moderate · AQI 73
Headaches
Risk of Headaches symptoms is Mild when AQI of Illinois is Moderate (51-100).
Commonly reported signs include: Pressure or tightness around the forehead and temples, Sensitivity to light or smell, Fatigue or difficulty concentrating.
- Favor indoor, filtered indoor air when the AQI is worse.
- Hydrate and take breaks from screens or bright light if you are migraine-prone.
- If you Try prescribed migraine meds, Have them accessible.
- Do not do intense outdoor exercise during elevated AQI periods.
- Avoid ignore worsening effects that feel unusual for you.
Disclaimer: The health risks mentioned above are precautionary recommendations based on current AQI levels. While you may not experience immediate effects, prolonged exposure to air pollution can lead to these health issues over time. This is not medical advice. Please consult a clinician if you experience severe, unusual, or worsening symptoms.
Illinois's Major Cities AQI
Explore live air quality pages for major cities in Illinois.
Air Quality FAQs at Illinois
Frequently Asked Questions
About Air Quality
The current real-time AQI (US) level in Illinois is 73 (Moderate). This was last updated recently.
The best AQI (US) level was generally lower during the early afternoon in the last 24 hours.
The worst AQI (US) level typically peaks during early morning or late evening hours due to temperature inversion.
The AQI (US) levels in Illinois have been fluctuating throughout the last 24 hours depending on traffic and weather conditions.
Current AQI (US) levels are moderate for everyone. It's advised to adjust your outdoor activities based on personal sensitivity.