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Chicago Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in Chicago

Last Updated: 2026-07-19 03:41:01 (Local Time)

Live AQI

153AQI (US)

Air Quality is

Unhealthy

PM2.5 : 61 µg/m³

pm10 : 88 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

21 °C

Last Updated: 2026-07-19 03:41:01 (Local Time)

Rank34^th

Currently, Chicago ranks 34^th among the most polluted cities globally.

Map

Chicago

Major Air Pollutants
Chicago

Particulate Matter(PM₂.₅)

61µg/m³

Particulate Matter(PM₁₀)

88µg/m³

Carbon Monoxide(CO)

289ppb

Sulfur Dioxide(SO₂)

2ppb

Nitrogen Dioxide(NO₂)

3ppb

Ozone(O₃)

31ppb

AQI Graph

Historical Air Quality Data
Chicago

24 Hours

AQI (US)

Chicago

AQI (US)

18-07-2026Time19-07-2026

Time	Chicago
2:31pm	44
3:01pm	44
3:31pm	43
4:01pm	49
4:31pm	47
5:01pm	48
5:31pm	47
6:01pm	50
6:31pm	50
7:01pm	71
7:31pm	69
8:01pm	96
8:31pm	92
9:01pm	118
9:31pm	120
10:01pm	133
10:31pm	131
11:01pm	130
11:31pm	139
12:01am	143
12:31am	141
1:01am	146
1:31am	148
2:01am	139
2:31am	139
3:01am	143
3:31am	140
4:01am	50
4:31am	52
5:01am	54
5:31am	71
6:01am	73
6:31am	109
7:01am	106
7:31am	136
8:01am	124
8:31am	154
9:01am	144
9:31am	134
10:01am	157
10:31am	162
11:01am	157
11:31am	160
12:01pm	163
12:31pm	154
1:01pm	149
1:31pm	164
2:01pm	158

Min. AQI (US)3:31pm

164

Max. AQI (US)1:31pm

Want air quality data?

AQI (US) Trends - Annual Air Quality Changes
Chicago, Illinois, United States

AQI (US)

Chicago's Locations
Real-time Air Pollution Level

locations

Status

AQI (US)

PM₂.₅(µg/m³)

PM₁₀(µg/m³)

Temp.(°C)

Humi.(%)

Ashburn

Unhealthy

163

Bridgeport

Unhealthy

158

East Side

Unhealthy

162

Hermosa

Unhealthy

164

Portage Park

Unhealthy

163

United States's Metro Cities
Air Quality Index

Chicago

153

Los Angeles

Minneapolis

Nashville

New Orleans

New York City

San Francisco

Washington

Air Quality Calendar 2026
Chicago

2026

AQI (US)

Health Advice For People Living In
Chicago

2Cigarettes per day

Weekly 14 Cigarettes

Monthly 60 Cigarettes

Breathing the air in this location is as harmful as smoking 2 cigarettes a day.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI (US)

Air PurifierTurn On

Car FilterMust

N95 MaskMust

Stay IndoorMust

Prevent Health Problems: Understand Your Risks

Chicago

Asthma

Heart Issues

Allergies

Sinus

Cold/Flu

Chronic (COPD)

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2026
United States

Analyze the real-time most air polluted cities in the country.

Most Polluted Cities Live Ranking 2026

World's Most PollutedCity Rankings (2025)

World's Most PollutedCountry Rankings(2025)

RankCityAQI Status

Standard Value

Appleton, Wisconsin

Severe

15xabove Standard

Green Bay, Wisconsin

Severe

13xabove Standard

Waukesha, Wisconsin

Severe

10xabove Standard

Rockford, Illinois

Unhealthy

10xabove Standard

Rhinelander, Wisconsin

Unhealthy

9xabove Standard

Madison, Wisconsin

Unhealthy

8xabove Standard

Baraboo, Wisconsin

Unhealthy

8xabove Standard

Shorewood, Wisconsin

Unhealthy

8xabove Standard

Milwaukee, Wisconsin

Unhealthy

7xabove Standard

10.

Greendale, Wisconsin

Unhealthy

7xabove Standard

Last Updated: 19 Jul 2026, 08:54 AM

AQI City Rankings

Air Quality Solutions For Chicago
Explore the solutions of air quality monitoring & clean air.

Here are some applications that you can go through to find out the solutions.

Air Quality Monitor

Monitor the air quality

Air Quality Sensors

Sensors to measure the air quality

Fresh Air Machine

Clean the air you breathe

Car Cabin Filter

Purify the air in your car

N95 Mask

Shield yourself from pollution

Prana Air offers the solutions of air quality monitoring and clean air machine for Chicago

Air Quality Solution For Offices

A complete solution for air quality monitoring, data analysis, and fresh air solutions in workplaces prioritizing employee's health and productivity.

Air Quality Solutions For Smart City

Prana Air smart city project provides air quality monitors, drones, outdoor air purifiers, and data dashboards solution to improve air quality.

Air Quality Solutions for Schools | Institutes

Prana Air provides the air quality solutions for schools by air monitoring & fresh air machine that help the students to breather clean air.

Air Quality Solutions For Hotels

Prana Air air quality solutions are suited for hotel businesses. The occupancy of hotels is the main reasons for bad air quality.

Air Quality Solutions for Restaurants

Prana Air has the air quality solutions for restaurant, cafes, and gives you the power to know what your customers and staff breathe.

Air Quality Solutions for RMC Plants

Prana Air provides air quality monitoring solutions for RMC plants. Improve compliance, protect workers and community, and reduce emissions.

Air Quality Solutions for Fitness Center

Prana Air provides the air quality solutions of pollution monitoring and fresh air for fitness center - gym.

Air Quality Solutions for Parking Lot

A complete solution for air monitoring, data analysis, and fresh air solutions for enclosed car parking areas and car lots.

Air Quality Solutions for Retail Stores

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets.

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets

Prana Air provides the air quality solutions for airport. Gathering of many passengers is the main reasons of bad air quality in airport.

Air Quality Solutions For Construction Sites

Prana Air offers air quality monitoring solutions for construction sites with data cloud storage, web-dashboard, mobile apps, TV display.

Air Quality Solutions For Hospitals

Prana Air provides air quality monitoring and fresh air solutions for hospitals to ensure clean and healthy indoor air.

Air Quality Solutions For Washroom | Bathroom

Improve washroom and bathroom air quality with Prana Air air quality monitoring devices and fresh air machine. Breathe easy and stay healthy.

Air Quality Solutions for Banks

Prana Air provides air quality solutions of pollution monitoring and fresh air for banks and financial institutions.

Air Quality Solutions for Cinema

Air quality solutions for cinema halls or theatres will help the customers to get the good experience, comfort and breathe clean air.

Air Quality Solutions For Real Estates

Prana Air provides the air quality solutions of pollution monitoring and fresh air for real estates - residential and commercial.

Chicago's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Air Quality FAQs
at Chicago

Frequently Asked Questions About Air Quality

1. What is the current AQI (US) level in Chicago?

The current real-time AQI (US) level in Chicago is 153 (Unhealthy). This was last updated 2026-07-19 03:41:01 (Local Time).

2. When was the best AQI (US) level in Chicago in the last 24 hours?

The best AQI (US) level was 43 (Good) at 3:31 PM, Jul 18, 2026 (Local Time) during the last 24 hours.

3. When was the worst AQI (US) level in Chicago in the last 24 hours?

The worst AQI (US) level was 164 (Unhealthy) at 1:31 PM (Local Time) during the last 24 hours.

4. What is the current trend of AQI (US) levels in Chicago during last 24 hours?

The AQI (US) levels in Chicago have been fluctuating throughout the last 24 hours. The levels have increased by highest 164 at 1:31 PM (Local Time), lowest 43 at 3:31 PM, Jul 18, 2026 (Local Time).

5. What actions are recommended as per the current AQI (US) level in Chicago?

Current AQI (US) levels are unhealthy for everyone. It's advised to limit outdoor activities and consider using air purifiers indoors.