Cook County Air Quality Index & Realtime Air Pollution
Primary Air Pollutants Cook County (Illinois)
Hourly forecast Cook County (Illinois)
Health Recommendations for Cook County Residents
Based on current air quality: Moderate · AQI 81
UV Index
2.65
Low
Safe to be outside. Minimal UV risk.
Wind
10.1 km/h
Light breeze — leaves rustling gently.
Historical AQI Data Cook County (Illinois)
United States Major Cities AQI Overview
New York
67
Temp.
27.3°C
Hum.
35%
Los Angeles
73
Temp.
29.3°C
Hum.
51%
Chicago
85
Temp.
29°C
Hum.
43%
Houston
94
Temp.
30.8°C
Hum.
72%
Phoenix
62
Temp.
37.6°C
Hum.
29%
San Francisco
35
Temp.
18.7°C
Hum.
80%
Seattle
50
Temp.
21.6°C
Hum.
74%
Denver
17
Temp.
36.5°C
Hum.
16%
Philadelphia
64
Temp.
29°C
Hum.
32%
San Antonio
72
Temp.
31.6°C
Hum.
61%
Dallas
75
Temp.
37°C
Hum.
40%
Atlanta
41
Temp.
33.4°C
Hum.
43%
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 | Detroit, Michigan | 91 | Moderate | 6x above Standard | |
| 2 | Charleston, West Virginia | 89 | Moderate | 6x above Standard | |
| 3 | Grand Rapids, Michigan | 88 | Moderate | 6x above Standard | |
| 4 | Lansing, Michigan | 88 | Moderate | 6x above Standard | |
| 5 | Ann Arbor, Michigan | 87 | Moderate | 6x above Standard | |
| 6 | Cleveland, Ohio | 84 | Moderate | 6x above Standard | |
| 7 | Cincinnati, Ohio | 81 | Moderate | 5x above Standard | |
| 8 | Toledo, Ohio | 80 | Moderate | 5x above Standard | |
| 9 | Columbus, Ohio | 79 | Moderate | 5x above Standard | |
| 10 | Louisville, Kentucky | 77 | Moderate | 5x above Standard |
Health Advice For People Living in Cook County
per day
Breathing the air in this location is equivalent to smoking 1.2 cigarettes a day.
Prevent Health Problems: Understand Your Risks
Cook County · Current air quality: Moderate · AQI 81
Headaches
Risk of Headaches symptoms is Mild when AQI of Cook County is Moderate (51-100).
Typical signs can include: Pressure or tightness around the forehead and temples, Sensitivity to light or smell, Fatigue or difficulty concentrating.
- Choose indoor, clean indoor air when the AQI is elevated.
- Stay hydrated and take short breaks from devices or harsh light if you are migraine-prone.
- If you Make use of prescribed migraine meds, Keep close them accessible.
- Try not to do intense outdoor exercise during worse AQI periods.
- Don’t ignore worsening symptoms 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.
Cook County's Nearby Cities AQI
Explore nearby city AQI pages around Cook County.
Air Quality FAQs at Cook County, Illinois
Frequently Asked Questions
About Air Quality
The current real-time AQI (US) level in Cook County, Illinois is 81 (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 Cook County, 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.