What are the current PM10 levels at Chicago, Illinois?

The current PM10 levels in Chicago, Illinois are 39.247 μg/m3.

What are the current sulfur dioxide (SO2) levels at Chicago, Illinois?

The current sulfur dioxide (SO2) levels in Chicago, Illinois are 0.373 ppb.

What are the current ozone (O3) levels at Chicago, Illinois?

The current ozone (O3) levels at Chicago, Illinois is 50.33 ppm.

What are the current nitrogen dioxide (NO2) levels at Chicago, Illinois?

The current nitrogen dioxide (NO2) levels at Chicago, Illinois is 3.322 ppb.

Real-time air quality index in Chicago, Illinois today

Name: Live air pollution levels in Chicago, Illinois today
Creator: Ambee

Stay updated with real-time air quality in Chicago, Illinois featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Good

Chicago, Illinois

Last updated: ... (Local time)

Common air pollutants in Chicago, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.08 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

8.47 μg/m³

155

255

425

605+

Ozone (O₃)

20.48 ppb

201

201+

Sulfur Dioxide (SO₂)

0.30 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.49 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Chicago, Illinois

Get Live Pollen Counts

Chicago, Illinois

Scroll To Air Quality Map

Track live Chicago, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-15T10:00:00.000Z	92 \| moderate	30.508 \| fine	132.082 \| fine	11.096 \| good	0.443 \| good	13.11 \| good	0.331 \| good
2025-07-15T11:00:00.000Z	88 \| moderate	29.479 \| fine	123.586 \| fine	8.719 \| good	0.43 \| good	14.827 \| good	0.396 \| good
2025-07-15T12:00:00.000Z	92 \| moderate	30.826 \| fine	131.529 \| fine	13.301 \| good	0.567 \| good	21.167 \| good	0.34 \| good
2025-07-15T13:00:00.000Z	88 \| moderate	29.49 \| fine	126.322 \| fine	13.127 \| good	0.739 \| good	18.531 \| good	0.307 \| good
2025-07-15T14:00:00.000Z	86 \| moderate	27.68 \| fine	120.444 \| fine	15.975 \| good	2.95 \| good	15.313 \| good	0.307 \| good
2025-07-15T15:00:00.000Z	86 \| moderate	27.888 \| fine	116.744 \| fine	30.287 \| good	3.107 \| good	11.955 \| good	0.292 \| good
2025-07-15T16:00:00.000Z	82 \| moderate	25.586 \| fine	111.878 \| fine	34.501 \| good	3.007 \| good	10.3 \| good	0.275 \| good
2025-07-15T17:00:00.000Z	77 \| moderate	23.343 \| fine	101.713 \| fine	39.038 \| good	0.957 \| good	6.089 \| good	0.275 \| good
2025-07-15T18:00:00.000Z	73 \| moderate	20.639 \| fine	88.5 \| fine	50.388 \| good	0.497 \| good	5.362 \| good	0.259 \| good
2025-07-15T19:00:00.000Z	71 \| moderate	19.972 \| fine	88.591 \| fine	56.766 \| fine	0.414 \| good	5.928 \| good	0.254 \| good
2025-07-15T20:00:00.000Z	73 \| moderate	21.146 \| fine	92.669 \| fine	58.959 \| fine	0.384 \| good	5.907 \| good	0.288 \| good
2025-07-15T21:00:00.000Z	73 \| moderate	20.955 \| fine	93.106 \| fine	61.053 \| fine	0.703 \| good	3.854 \| good	0.29 \| good
2025-07-15T22:00:00.000Z	73 \| moderate	20.985 \| fine	90.344 \| fine	60.175 \| fine	0.445 \| good	2.45 \| good	0.266 \| good
2025-07-15T23:00:00.000Z	77 \| moderate	20.512 \| fine	90.578 \| fine	62.701 \| fine	0.462 \| good	1.951 \| good	0.266 \| good
2025-07-16T00:00:00.000Z	73 \| moderate	20.982 \| fine	91.003 \| fine	61.263 \| fine	0.539 \| good	3.886 \| good	0.289 \| good
2025-07-16T01:00:00.000Z	73 \| moderate	21.036 \| fine	91.007 \| fine	57.417 \| fine	0.437 \| good	5.174 \| good	0.295 \| good
2025-07-16T02:00:00.000Z	73 \| moderate	20.852 \| fine	92.751 \| fine	58.842 \| fine	0.534 \| good	5.59 \| good	0.295 \| good
2025-07-16T03:00:00.000Z	54 \| moderate	10.887 \| good	48.101 \| good	37.469 \| good	1.252 \| good	11.077 \| good	0.303 \| good
2025-07-16T04:00:00.000Z	60 \| moderate	14.155 \| fine	64.737 \| fine	39.715 \| good	0.37 \| good	12.153 \| good	0.371 \| good
2025-07-16T05:00:00.000Z	56 \| moderate	11.788 \| good	52.51 \| good	37.038 \| good	0.353 \| good	12.306 \| good	0.23 \| good
2025-07-16T06:00:00.000Z	52 \| moderate	10.074 \| good	42.848 \| good	31.767 \| good	0.362 \| good	8.753 \| good	0.251 \| good
2025-07-16T07:00:00.000Z	52 \| moderate	9.817 \| good	43.346 \| good	26.629 \| good	0.336 \| good	9.421 \| good	0.275 \| good
2025-07-16T08:00:00.000Z	44 \| good	8.293 \| good	36.565 \| good	22.57 \| good	0.343 \| good	6.396 \| good	0.188 \| good
2025-07-16T09:00:00.000Z	44 \| good	8.115 \| good	35.861 \| good	24.092 \| good	0.34 \| good	5.992 \| good	0.236 \| good
2025-07-16T10:00:00.000Z	44 \| good	8.135 \| good	37.857 \| good	23.95 \| good	0.337 \| good	8.824 \| good	0.181 \| good
2025-07-16T11:00:00.000Z	44 \| good	8.079 \| good	35.786 \| good	20.423 \| good	0.308 \| good	13.141 \| good	0.344 \| good
2025-07-16T12:00:00.000Z	44 \| good	7.952 \| good	35.276 \| good	16.071 \| good	0.314 \| good	12.788 \| good	0.328 \| good
2025-07-16T13:00:00.000Z	49 \| good	8.522 \| good	37.259 \| good	16.038 \| good	0.313 \| good	10.003 \| good	0.31 \| good
2025-07-16T14:00:00.000Z	44 \| good	8.306 \| good	36.365 \| good	20.198 \| good	0.265 \| good	7.923 \| good	0.321 \| good
2025-07-16T15:00:00.000Z	44 \| good	8.348 \| good	36.41 \| good	23.193 \| good	0.35 \| good	6.836 \| good	0.367 \| good
2025-07-16T16:00:00.000Z	49 \| good	8.511 \| good	38.619 \| good	28.043 \| good	0.366 \| good	5.289 \| good	0.247 \| good
2025-07-16T17:00:00.000Z	52 \| moderate	9.538 \| good	42.727 \| good	35.204 \| good	0.361 \| good	5.487 \| good	0.259 \| good
2025-07-16T18:00:00.000Z	52 \| moderate	9.668 \| good	43.579 \| good	41.545 \| good	0.4 \| good	4.126 \| good	0.175 \| good
2025-07-16T19:00:00.000Z	52 \| moderate	9.57 \| good	43.102 \| good	47.555 \| good	0.415 \| good	3.57 \| good	0.175 \| good
2025-07-16T20:00:00.000Z	52 \| moderate	10.214 \| good	45.593 \| good	50.227 \| good	0.441 \| good	2.954 \| good	0.305 \| good
2025-07-16T21:00:00.000Z	52 \| moderate	10.084 \| good	44.809 \| good	52.674 \| good	0.369 \| good	2.877 \| good	0.364 \| good
2025-07-16T22:00:00.000Z	49 \| good	8.907 \| good	39.247 \| good	50.33 \| good	0.373 \| good	3.322 \| good	0.364 \| good
2025-07-16T23:00:00.000Z	41 \| good	6.584 \| good	29.559 \| good	43.854 \| good	0.328 \| good	5.025 \| good	0.433 \| good
2025-07-17T00:00:00.000Z	37 \| good	5.85 \| good	25.894 \| good	40.445 \| good	0.321 \| good	8.092 \| good	0.429 \| good
2025-07-17T01:00:00.000Z	33 \| good	5.668 \| good	24.297 \| good	35.615 \| good	0.323 \| good	7.948 \| good	0.443 \| good
2025-07-17T02:00:00.000Z	33 \| good	5.582 \| good	24.202 \| good	32.036 \| good	0.295 \| good	6.867 \| good	0.414 \| good
2025-07-17T03:00:00.000Z	27 \| good	5.4 \| good	23.304 \| good	28.241 \| good	0.277 \| good	4.112 \| good	0.356 \| good
2025-07-17T04:00:00.000Z	27 \| good	4.831 \| good	21.139 \| good	28.728 \| good	0.287 \| good	3.751 \| good	0.293 \| good
2025-07-17T05:00:00.000Z	26 \| good	4.036 \| good	18.144 \| good	27.893 \| good	0.253 \| good	3.423 \| good	0.27 \| good
2025-07-17T06:00:00.000Z	26 \| good	3.665 \| good	16.818 \| good	27.589 \| good	0.322 \| good	2.427 \| good	0.218 \| good
2025-07-17T07:00:00.000Z	21 \| good	2.276 \| good	9.929 \| good	22.775 \| good	0.219 \| good	3.675 \| good	0.253 \| good
2025-07-17T08:00:00.000Z	19 \| good	2.082 \| good	8.467 \| good	20.482 \| good	0.298 \| good	4.487 \| good	0.194 \| good
2025-07-17T09:00:00.000Z	20 \| good	2.211 \| good	8.769 \| good	21.839 \| good	0.205 \| good	4.851 \| good	0.155 \| good
2025-07-17T09:00:00.000Z	19 \| good	2.082 \| good	8.467 \| good	20.482 \| good	0.298 \| good	4.487 \| good	0.194 \| good
2025-07-16T23:00:00.000Z	87 \| moderate	17.233 \| fine	76.439 \| fine	66.442 \| fine	1.435 \| good	4.048 \| good	0.186 \| good
2025-07-17T00:00:00.000Z	58 \| moderate	13.086 \| fine	58.667 \| fine	56.789 \| fine	1.467 \| good	5.102 \| good	0.193 \| good
2025-07-17T01:00:00.000Z	56 \| moderate	11.615 \| good	52.142 \| good	51.352 \| good	1.471 \| good	6.697 \| good	0.202 \| good
2025-07-17T02:00:00.000Z	58 \| moderate	13.314 \| fine	59.942 \| fine	45.58 \| good	1.475 \| good	8.293 \| good	0.211 \| good
2025-07-17T03:00:00.000Z	58 \| moderate	12.811 \| fine	57.389 \| fine	40.012 \| good	1.479 \| good	9.889 \| good	0.219 \| good
2025-07-17T04:00:00.000Z	58 \| moderate	13.086 \| fine	58.796 \| fine	34.992 \| good	1.576 \| good	9.276 \| good	0.212 \| good
2025-07-17T05:00:00.000Z	60 \| moderate	13.758 \| fine	61.674 \| fine	26.932 \| good	1.673 \| good	8.662 \| good	0.205 \| good
2025-07-17T06:00:00.000Z	60 \| moderate	13.855 \| fine	62.359 \| fine	23.44 \| good	1.771 \| good	8.049 \| good	0.198 \| good
2025-07-17T07:00:00.000Z	58 \| moderate	13.39 \| fine	60.359 \| fine	21.293 \| good	1.575 \| good	6.828 \| good	0.185 \| good
2025-07-17T08:00:00.000Z	58 \| moderate	12.631 \| fine	56.351 \| fine	19.567 \| good	1.38 \| good	5.607 \| good	0.172 \| good
2025-07-17T09:00:00.000Z	54 \| moderate	10.876 \| good	47.95 \| good	18.946 \| good	1.185 \| good	4.387 \| good	0.16 \| good
2025-07-17T10:00:00.000Z	52 \| moderate	9.818 \| good	43.418 \| good	18.171 \| good	1.123 \| good	4.306 \| good	0.16 \| good
2025-07-17T11:00:00.000Z	54 \| moderate	11.104 \| good	49.326 \| good	13.39 \| good	1.061 \| good	4.225 \| good	0.16 \| good
2025-07-17T12:00:00.000Z	54 \| moderate	10.761 \| good	47.729 \| good	14.789 \| good	1 \| good	4.144 \| good	0.16 \| good
2025-07-17T13:00:00.000Z	56 \| moderate	11.919 \| good	53.033 \| good	17.568 \| good	0.951 \| good	4.005 \| good	0.161 \| good
2025-07-17T14:00:00.000Z	56 \| moderate	12.243 \| fine	55.079 \| fine	22.038 \| good	0.903 \| good	3.867 \| good	0.162 \| good
2025-07-17T15:00:00.000Z	52 \| moderate	10.213 \| good	45.456 \| good	27.62 \| good	0.854 \| good	3.728 \| good	0.163 \| good
2025-07-17T16:00:00.000Z	54 \| moderate	10.626 \| good	47.236 \| good	33.356 \| good	0.799 \| good	3.192 \| good	0.155 \| good
2025-07-17T17:00:00.000Z	54 \| moderate	11.045 \| good	49.106 \| good	36.693 \| good	0.744 \| good	2.656 \| good	0.147 \| good
2025-07-17T18:00:00.000Z	52 \| moderate	9.723 \| good	43.081 \| good	37.607 \| good	0.69 \| good	2.12 \| good	0.14 \| good
2025-07-17T19:00:00.000Z	38 \| good	7.441 \| good	32.971 \| good	37.523 \| good	0.648 \| good	1.987 \| good	0.137 \| good
2025-07-17T20:00:00.000Z	33 \| good	5.921 \| good	25.795 \| good	34.792 \| good	0.606 \| good	1.854 \| good	0.135 \| good
2025-07-17T21:00:00.000Z	33 \| good	5.93 \| good	26.716 \| good	32.706 \| good	0.564 \| good	1.721 \| good	0.133 \| good
2025-07-17T22:00:00.000Z	33 \| good	6.465 \| good	28.883 \| good	33.071 \| good	0.595 \| good	2.088 \| good	0.131 \| good
2025-07-17T23:00:00.000Z	33 \| good	6.348 \| good	28.065 \| good	33.987 \| good	0.625 \| good	2.455 \| good	0.13 \| good
2025-07-18T00:00:00.000Z	32 \| good	0.886 \| good	3.407 \| good	35.362 \| good	0.655 \| good	2.822 \| good	0.128 \| good
2025-07-18T01:00:00.000Z	32 \| good	3.71 \| good	16.392 \| good	35.148 \| good	0.689 \| good	3.06 \| good	0.125 \| good
2025-07-18T02:00:00.000Z	34 \| good	4.586 \| good	20.013 \| good	36.659 \| good	0.723 \| good	3.297 \| good	0.123 \| good
2025-07-18T03:00:00.000Z	33 \| good	3.637 \| good	15.81 \| good	36.15 \| good	0.758 \| good	3.535 \| good	0.121 \| good
2025-07-18T04:00:00.000Z	30 \| good	4.89 \| good	21.506 \| good	31.542 \| good	0.762 \| good	3.466 \| good	0.119 \| good
2025-07-18T05:00:00.000Z	33 \| good	5.802 \| good	25.297 \| good	28.727 \| good	0.765 \| good	3.397 \| good	0.117 \| good
2025-07-18T06:00:00.000Z	33 \| good	5.964 \| good	25.534 \| good	25.399 \| good	0.769 \| good	3.328 \| good	0.116 \| good
2025-07-18T07:00:00.000Z	38 \| good	7.334 \| good	32.575 \| good	22.388 \| good	0.814 \| good	3.178 \| good	0.114 \| good
2025-07-18T08:00:00.000Z	44 \| good	7.743 \| good	33.89 \| good	20.266 \| good	0.858 \| good	3.028 \| good	0.113 \| good
2025-07-18T09:00:00.000Z	44 \| good	7.539 \| good	33.167 \| good	21.169 \| good	0.902 \| good	2.879 \| good	0.112 \| good
2025-07-18T10:00:00.000Z	22 \| good	4.211 \| good	18.473 \| good	17.953 \| good	0.958 \| good	2.797 \| good	0.114 \| good
2025-07-18T11:00:00.000Z	33 \| good	5.715 \| good	24.746 \| good	20.624 \| good	1.014 \| good	2.715 \| good	0.116 \| good
2025-07-18T12:00:00.000Z	38 \| good	7.127 \| good	31.769 \| good	23.196 \| good	1.069 \| good	2.633 \| good	0.118 \| good
2025-07-18T13:00:00.000Z	49 \| good	9.247 \| good	41.099 \| good	27.117 \| good	1.068 \| good	2.596 \| good	0.127 \| good
2025-07-18T14:00:00.000Z	54 \| moderate	11.103 \| good	49.379 \| good	31.498 \| good	1.068 \| good	2.56 \| good	0.137 \| good
2025-07-18T15:00:00.000Z	54 \| moderate	11.368 \| good	50.73 \| good	36.007 \| good	1.067 \| good	2.523 \| good	0.146 \| good
2025-07-18T16:00:00.000Z	56 \| moderate	11.803 \| good	52.027 \| good	39.657 \| good	1.146 \| good	2.314 \| good	0.15 \| good
2025-07-18T17:00:00.000Z	56 \| moderate	11.977 \| good	53.404 \| good	44.419 \| good	1.226 \| good	2.105 \| good	0.155 \| good
2025-07-18T18:00:00.000Z	54 \| moderate	11.139 \| good	49.417 \| good	47.345 \| good	1.305 \| good	1.895 \| good	0.16 \| good
2025-07-18T19:00:00.000Z	56 \| moderate	12.416 \| fine	55.955 \| fine	50.866 \| good	1.348 \| good	1.93 \| good	0.162 \| good
2025-07-18T20:00:00.000Z	60 \| moderate	13.536 \| fine	60.457 \| fine	52.616 \| good	1.39 \| good	1.964 \| good	0.165 \| good
2025-07-18T21:00:00.000Z	60 \| moderate	14.296 \| fine	64.247 \| fine	51.751 \| good	1.433 \| good	1.999 \| good	0.167 \| good
2025-07-18T22:00:00.000Z	58 \| moderate	13.362 \| fine	59.997 \| fine	50.281 \| good	1.425 \| good	2.812 \| good	0.17 \| good

Chicago

Empower business decisions with accurate air quality data

Chicago, Illinois air quality map: Real-time AQI near you

0.37ppm

How accurate is Illinois, USA air quality data?

Air quality measurements for Illinois, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

Frequently asked questions

How frequently is the air quality data for Chicago, Illinois updated?

Air quality data for Chicago, Illinois is updated on an hourly basis.

When did Chicago, Illinois experience the worst air quality in the last 24 hours?

The worst air quality in Chicago, Illinois was recorded at 11:00:00 on 2025-07-15.

When did Chicago, Illinois have its best air quality in the last 24 hours?

The best air quality in Chicago, Illinois was recorded at 03:00:00 on 2025-07-16.

What is the real-time air quality index for Chicago, Illinois?

The real-time air quality index in Chicago, Illinois is 49, currently categorized as Good.

Which pollutant is found most often in Chicago, Illinois?

The most common pollutant in Chicago, Illinois is PM2.5.

What can I do if the air quality in Chicago, Illinois is poor?

If the air quality in Chicago, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Chicago, Illinois?

The measured PM_2.5 levels in Chicago, Illinois at present are 8.907 μg/m³.

What are the current PM₁₀ levels at Chicago, Illinois?

The current PM₁₀ levels in Chicago, Illinois are 39.247 μg/m³.

What are the current carbon monoxide (CO) levels at Chicago, Illinois?

The current carbon monoxide (CO) level in Chicago, Illinois is 0.364 ppm.

What are the current sulfur dioxide (SO₂) levels at Chicago, Illinois?

The current sulfur dioxide (SO₂) levels in Chicago, Illinois are 0.373 ppb.

What are the current ozone (O₃) levels at Chicago, Illinois?

The current ozone (O₃) levels at Chicago, Illinois is 50.33 ppm.

What are the current nitrogen dioxide (NO₂) levels at Chicago, Illinois?

The current nitrogen dioxide (NO₂) levels at Chicago, Illinois is 3.322 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-15T10:00:00.000Z	92 \| moderate	30.508 \| fine	132.082 \| fine	11.096 \| good	0.443 \| good	13.11 \| good	0.331 \| good
2025-07-15T11:00:00.000Z	88 \| moderate	29.479 \| fine	123.586 \| fine	8.719 \| good	0.43 \| good	14.827 \| good	0.396 \| good
2025-07-15T12:00:00.000Z	92 \| moderate	30.826 \| fine	131.529 \| fine	13.301 \| good	0.567 \| good	21.167 \| good	0.34 \| good
2025-07-15T13:00:00.000Z	88 \| moderate	29.49 \| fine	126.322 \| fine	13.127 \| good	0.739 \| good	18.531 \| good	0.307 \| good
2025-07-15T14:00:00.000Z	86 \| moderate	27.68 \| fine	120.444 \| fine	15.975 \| good	2.95 \| good	15.313 \| good	0.307 \| good
2025-07-15T15:00:00.000Z	86 \| moderate	27.888 \| fine	116.744 \| fine	30.287 \| good	3.107 \| good	11.955 \| good	0.292 \| good
2025-07-15T16:00:00.000Z	82 \| moderate	25.586 \| fine	111.878 \| fine	34.501 \| good	3.007 \| good	10.3 \| good	0.275 \| good
2025-07-15T17:00:00.000Z	77 \| moderate	23.343 \| fine	101.713 \| fine	39.038 \| good	0.957 \| good	6.089 \| good	0.275 \| good
2025-07-15T18:00:00.000Z	73 \| moderate	20.639 \| fine	88.5 \| fine	50.388 \| good	0.497 \| good	5.362 \| good	0.259 \| good
2025-07-15T19:00:00.000Z	71 \| moderate	19.972 \| fine	88.591 \| fine	56.766 \| fine	0.414 \| good	5.928 \| good	0.254 \| good
2025-07-15T20:00:00.000Z	73 \| moderate	21.146 \| fine	92.669 \| fine	58.959 \| fine	0.384 \| good	5.907 \| good	0.288 \| good
2025-07-15T21:00:00.000Z	73 \| moderate	20.955 \| fine	93.106 \| fine	61.053 \| fine	0.703 \| good	3.854 \| good	0.29 \| good
2025-07-15T22:00:00.000Z	73 \| moderate	20.985 \| fine	90.344 \| fine	60.175 \| fine	0.445 \| good	2.45 \| good	0.266 \| good
2025-07-15T23:00:00.000Z	77 \| moderate	20.512 \| fine	90.578 \| fine	62.701 \| fine	0.462 \| good	1.951 \| good	0.266 \| good
2025-07-16T00:00:00.000Z	73 \| moderate	20.982 \| fine	91.003 \| fine	61.263 \| fine	0.539 \| good	3.886 \| good	0.289 \| good
2025-07-16T01:00:00.000Z	73 \| moderate	21.036 \| fine	91.007 \| fine	57.417 \| fine	0.437 \| good	5.174 \| good	0.295 \| good
2025-07-16T02:00:00.000Z	73 \| moderate	20.852 \| fine	92.751 \| fine	58.842 \| fine	0.534 \| good	5.59 \| good	0.295 \| good
2025-07-16T03:00:00.000Z	54 \| moderate	10.887 \| good	48.101 \| good	37.469 \| good	1.252 \| good	11.077 \| good	0.303 \| good
2025-07-16T04:00:00.000Z	60 \| moderate	14.155 \| fine	64.737 \| fine	39.715 \| good	0.37 \| good	12.153 \| good	0.371 \| good
2025-07-16T05:00:00.000Z	56 \| moderate	11.788 \| good	52.51 \| good	37.038 \| good	0.353 \| good	12.306 \| good	0.23 \| good
2025-07-16T06:00:00.000Z	52 \| moderate	10.074 \| good	42.848 \| good	31.767 \| good	0.362 \| good	8.753 \| good	0.251 \| good
2025-07-16T07:00:00.000Z	52 \| moderate	9.817 \| good	43.346 \| good	26.629 \| good	0.336 \| good	9.421 \| good	0.275 \| good
2025-07-16T08:00:00.000Z	44 \| good	8.293 \| good	36.565 \| good	22.57 \| good	0.343 \| good	6.396 \| good	0.188 \| good
2025-07-16T09:00:00.000Z	44 \| good	8.115 \| good	35.861 \| good	24.092 \| good	0.34 \| good	5.992 \| good	0.236 \| good
2025-07-16T10:00:00.000Z	44 \| good	8.135 \| good	37.857 \| good	23.95 \| good	0.337 \| good	8.824 \| good	0.181 \| good
2025-07-16T11:00:00.000Z	44 \| good	8.079 \| good	35.786 \| good	20.423 \| good	0.308 \| good	13.141 \| good	0.344 \| good
2025-07-16T12:00:00.000Z	44 \| good	7.952 \| good	35.276 \| good	16.071 \| good	0.314 \| good	12.788 \| good	0.328 \| good
2025-07-16T13:00:00.000Z	49 \| good	8.522 \| good	37.259 \| good	16.038 \| good	0.313 \| good	10.003 \| good	0.31 \| good
2025-07-16T14:00:00.000Z	44 \| good	8.306 \| good	36.365 \| good	20.198 \| good	0.265 \| good	7.923 \| good	0.321 \| good
2025-07-16T15:00:00.000Z	44 \| good	8.348 \| good	36.41 \| good	23.193 \| good	0.35 \| good	6.836 \| good	0.367 \| good
2025-07-16T16:00:00.000Z	49 \| good	8.511 \| good	38.619 \| good	28.043 \| good	0.366 \| good	5.289 \| good	0.247 \| good
2025-07-16T17:00:00.000Z	52 \| moderate	9.538 \| good	42.727 \| good	35.204 \| good	0.361 \| good	5.487 \| good	0.259 \| good
2025-07-16T18:00:00.000Z	52 \| moderate	9.668 \| good	43.579 \| good	41.545 \| good	0.4 \| good	4.126 \| good	0.175 \| good
2025-07-16T19:00:00.000Z	52 \| moderate	9.57 \| good	43.102 \| good	47.555 \| good	0.415 \| good	3.57 \| good	0.175 \| good
2025-07-16T20:00:00.000Z	52 \| moderate	10.214 \| good	45.593 \| good	50.227 \| good	0.441 \| good	2.954 \| good	0.305 \| good
2025-07-16T21:00:00.000Z	52 \| moderate	10.084 \| good	44.809 \| good	52.674 \| good	0.369 \| good	2.877 \| good	0.364 \| good
2025-07-16T22:00:00.000Z	49 \| good	8.907 \| good	39.247 \| good	50.33 \| good	0.373 \| good	3.322 \| good	0.364 \| good
2025-07-16T23:00:00.000Z	41 \| good	6.584 \| good	29.559 \| good	43.854 \| good	0.328 \| good	5.025 \| good	0.433 \| good
2025-07-17T00:00:00.000Z	37 \| good	5.85 \| good	25.894 \| good	40.445 \| good	0.321 \| good	8.092 \| good	0.429 \| good
2025-07-17T01:00:00.000Z	33 \| good	5.668 \| good	24.297 \| good	35.615 \| good	0.323 \| good	7.948 \| good	0.443 \| good
2025-07-17T02:00:00.000Z	33 \| good	5.582 \| good	24.202 \| good	32.036 \| good	0.295 \| good	6.867 \| good	0.414 \| good
2025-07-17T03:00:00.000Z	27 \| good	5.4 \| good	23.304 \| good	28.241 \| good	0.277 \| good	4.112 \| good	0.356 \| good
2025-07-17T04:00:00.000Z	27 \| good	4.831 \| good	21.139 \| good	28.728 \| good	0.287 \| good	3.751 \| good	0.293 \| good
2025-07-17T05:00:00.000Z	26 \| good	4.036 \| good	18.144 \| good	27.893 \| good	0.253 \| good	3.423 \| good	0.27 \| good
2025-07-17T06:00:00.000Z	26 \| good	3.665 \| good	16.818 \| good	27.589 \| good	0.322 \| good	2.427 \| good	0.218 \| good
2025-07-17T07:00:00.000Z	21 \| good	2.276 \| good	9.929 \| good	22.775 \| good	0.219 \| good	3.675 \| good	0.253 \| good
2025-07-17T08:00:00.000Z	19 \| good	2.082 \| good	8.467 \| good	20.482 \| good	0.298 \| good	4.487 \| good	0.194 \| good
2025-07-17T09:00:00.000Z	20 \| good	2.211 \| good	8.769 \| good	21.839 \| good	0.205 \| good	4.851 \| good	0.155 \| good
2025-07-17T09:00:00.000Z	19 \| good	2.082 \| good	8.467 \| good	20.482 \| good	0.298 \| good	4.487 \| good	0.194 \| good
2025-07-16T23:00:00.000Z	87 \| moderate	17.233 \| fine	76.439 \| fine	66.442 \| fine	1.435 \| good	4.048 \| good	0.186 \| good
2025-07-17T00:00:00.000Z	58 \| moderate	13.086 \| fine	58.667 \| fine	56.789 \| fine	1.467 \| good	5.102 \| good	0.193 \| good
2025-07-17T01:00:00.000Z	56 \| moderate	11.615 \| good	52.142 \| good	51.352 \| good	1.471 \| good	6.697 \| good	0.202 \| good
2025-07-17T02:00:00.000Z	58 \| moderate	13.314 \| fine	59.942 \| fine	45.58 \| good	1.475 \| good	8.293 \| good	0.211 \| good
2025-07-17T03:00:00.000Z	58 \| moderate	12.811 \| fine	57.389 \| fine	40.012 \| good	1.479 \| good	9.889 \| good	0.219 \| good
2025-07-17T04:00:00.000Z	58 \| moderate	13.086 \| fine	58.796 \| fine	34.992 \| good	1.576 \| good	9.276 \| good	0.212 \| good
2025-07-17T05:00:00.000Z	60 \| moderate	13.758 \| fine	61.674 \| fine	26.932 \| good	1.673 \| good	8.662 \| good	0.205 \| good
2025-07-17T06:00:00.000Z	60 \| moderate	13.855 \| fine	62.359 \| fine	23.44 \| good	1.771 \| good	8.049 \| good	0.198 \| good
2025-07-17T07:00:00.000Z	58 \| moderate	13.39 \| fine	60.359 \| fine	21.293 \| good	1.575 \| good	6.828 \| good	0.185 \| good
2025-07-17T08:00:00.000Z	58 \| moderate	12.631 \| fine	56.351 \| fine	19.567 \| good	1.38 \| good	5.607 \| good	0.172 \| good
2025-07-17T09:00:00.000Z	54 \| moderate	10.876 \| good	47.95 \| good	18.946 \| good	1.185 \| good	4.387 \| good	0.16 \| good
2025-07-17T10:00:00.000Z	52 \| moderate	9.818 \| good	43.418 \| good	18.171 \| good	1.123 \| good	4.306 \| good	0.16 \| good
2025-07-17T11:00:00.000Z	54 \| moderate	11.104 \| good	49.326 \| good	13.39 \| good	1.061 \| good	4.225 \| good	0.16 \| good
2025-07-17T12:00:00.000Z	54 \| moderate	10.761 \| good	47.729 \| good	14.789 \| good	1 \| good	4.144 \| good	0.16 \| good
2025-07-17T13:00:00.000Z	56 \| moderate	11.919 \| good	53.033 \| good	17.568 \| good	0.951 \| good	4.005 \| good	0.161 \| good
2025-07-17T14:00:00.000Z	56 \| moderate	12.243 \| fine	55.079 \| fine	22.038 \| good	0.903 \| good	3.867 \| good	0.162 \| good
2025-07-17T15:00:00.000Z	52 \| moderate	10.213 \| good	45.456 \| good	27.62 \| good	0.854 \| good	3.728 \| good	0.163 \| good
2025-07-17T16:00:00.000Z	54 \| moderate	10.626 \| good	47.236 \| good	33.356 \| good	0.799 \| good	3.192 \| good	0.155 \| good
2025-07-17T17:00:00.000Z	54 \| moderate	11.045 \| good	49.106 \| good	36.693 \| good	0.744 \| good	2.656 \| good	0.147 \| good
2025-07-17T18:00:00.000Z	52 \| moderate	9.723 \| good	43.081 \| good	37.607 \| good	0.69 \| good	2.12 \| good	0.14 \| good
2025-07-17T19:00:00.000Z	38 \| good	7.441 \| good	32.971 \| good	37.523 \| good	0.648 \| good	1.987 \| good	0.137 \| good
2025-07-17T20:00:00.000Z	33 \| good	5.921 \| good	25.795 \| good	34.792 \| good	0.606 \| good	1.854 \| good	0.135 \| good
2025-07-17T21:00:00.000Z	33 \| good	5.93 \| good	26.716 \| good	32.706 \| good	0.564 \| good	1.721 \| good	0.133 \| good
2025-07-17T22:00:00.000Z	33 \| good	6.465 \| good	28.883 \| good	33.071 \| good	0.595 \| good	2.088 \| good	0.131 \| good
2025-07-17T23:00:00.000Z	33 \| good	6.348 \| good	28.065 \| good	33.987 \| good	0.625 \| good	2.455 \| good	0.13 \| good
2025-07-18T00:00:00.000Z	32 \| good	0.886 \| good	3.407 \| good	35.362 \| good	0.655 \| good	2.822 \| good	0.128 \| good
2025-07-18T01:00:00.000Z	32 \| good	3.71 \| good	16.392 \| good	35.148 \| good	0.689 \| good	3.06 \| good	0.125 \| good
2025-07-18T02:00:00.000Z	34 \| good	4.586 \| good	20.013 \| good	36.659 \| good	0.723 \| good	3.297 \| good	0.123 \| good
2025-07-18T03:00:00.000Z	33 \| good	3.637 \| good	15.81 \| good	36.15 \| good	0.758 \| good	3.535 \| good	0.121 \| good
2025-07-18T04:00:00.000Z	30 \| good	4.89 \| good	21.506 \| good	31.542 \| good	0.762 \| good	3.466 \| good	0.119 \| good
2025-07-18T05:00:00.000Z	33 \| good	5.802 \| good	25.297 \| good	28.727 \| good	0.765 \| good	3.397 \| good	0.117 \| good
2025-07-18T06:00:00.000Z	33 \| good	5.964 \| good	25.534 \| good	25.399 \| good	0.769 \| good	3.328 \| good	0.116 \| good
2025-07-18T07:00:00.000Z	38 \| good	7.334 \| good	32.575 \| good	22.388 \| good	0.814 \| good	3.178 \| good	0.114 \| good
2025-07-18T08:00:00.000Z	44 \| good	7.743 \| good	33.89 \| good	20.266 \| good	0.858 \| good	3.028 \| good	0.113 \| good
2025-07-18T09:00:00.000Z	44 \| good	7.539 \| good	33.167 \| good	21.169 \| good	0.902 \| good	2.879 \| good	0.112 \| good
2025-07-18T10:00:00.000Z	22 \| good	4.211 \| good	18.473 \| good	17.953 \| good	0.958 \| good	2.797 \| good	0.114 \| good
2025-07-18T11:00:00.000Z	33 \| good	5.715 \| good	24.746 \| good	20.624 \| good	1.014 \| good	2.715 \| good	0.116 \| good
2025-07-18T12:00:00.000Z	38 \| good	7.127 \| good	31.769 \| good	23.196 \| good	1.069 \| good	2.633 \| good	0.118 \| good
2025-07-18T13:00:00.000Z	49 \| good	9.247 \| good	41.099 \| good	27.117 \| good	1.068 \| good	2.596 \| good	0.127 \| good
2025-07-18T14:00:00.000Z	54 \| moderate	11.103 \| good	49.379 \| good	31.498 \| good	1.068 \| good	2.56 \| good	0.137 \| good
2025-07-18T15:00:00.000Z	54 \| moderate	11.368 \| good	50.73 \| good	36.007 \| good	1.067 \| good	2.523 \| good	0.146 \| good
2025-07-18T16:00:00.000Z	56 \| moderate	11.803 \| good	52.027 \| good	39.657 \| good	1.146 \| good	2.314 \| good	0.15 \| good
2025-07-18T17:00:00.000Z	56 \| moderate	11.977 \| good	53.404 \| good	44.419 \| good	1.226 \| good	2.105 \| good	0.155 \| good
2025-07-18T18:00:00.000Z	54 \| moderate	11.139 \| good	49.417 \| good	47.345 \| good	1.305 \| good	1.895 \| good	0.16 \| good
2025-07-18T19:00:00.000Z	56 \| moderate	12.416 \| fine	55.955 \| fine	50.866 \| good	1.348 \| good	1.93 \| good	0.162 \| good
2025-07-18T20:00:00.000Z	60 \| moderate	13.536 \| fine	60.457 \| fine	52.616 \| good	1.39 \| good	1.964 \| good	0.165 \| good
2025-07-18T21:00:00.000Z	60 \| moderate	14.296 \| fine	64.247 \| fine	51.751 \| good	1.433 \| good	1.999 \| good	0.167 \| good
2025-07-18T22:00:00.000Z	58 \| moderate	13.362 \| fine	59.997 \| fine	50.281 \| good	1.425 \| good	2.812 \| good	0.17 \| good

Real-time air quality index in Chicago, Illinois today

Common air pollutants in Chicago, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Chicago, Illinois air quality forecast and history

Empower business decisions with accurate air quality data

Chicago, Illinois air quality map: Real-time AQI near you

Air quality in nearby cities

Cicero, Illinois

Oak Park, Illinois

Berwyn, Illinois

Forest Park, Illinois

Elmwood Park, Illinois

River Forest, Illinois

How accurate is Illinois, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Chicago, Illinois updated?

When did Chicago, Illinois experience the worst air quality in the last 24 hours?

When did Chicago, Illinois have its best air quality in the last 24 hours?

What is the real-time air quality index for Chicago, Illinois?

Which pollutant is found most often in Chicago, Illinois?

What can I do if the air quality in Chicago, Illinois is poor?

What are the current PM2.5 levels in Chicago, Illinois?

What are the current PM10 levels at Chicago, Illinois?

What are the current carbon monoxide (CO) levels at Chicago, Illinois?

What are the current sulfur dioxide (SO2) levels at Chicago, Illinois?

What are the current ozone (O3) levels at Chicago, Illinois?

What are the current nitrogen dioxide (NO2) levels at Chicago, Illinois?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Chicago, Illinois?

What are the current PM₁₀ levels at Chicago, Illinois?

What are the current sulfur dioxide (SO₂) levels at Chicago, Illinois?

What are the current ozone (O₃) levels at Chicago, Illinois?

What are the current nitrogen dioxide (NO₂) levels at Chicago, Illinois?