What is the current level of PM10 in Illinois, USA?

Illinois, USA currently has a PM10 concentration of 45.898 μg/m3.

What is the current level of sulfur dioxide (SO2) in Illinois, USA?

The current sulfur dioxide (SO2) concentration in Illinois, USA is 0.737 ppb.

What is the current level of ozone (O3) in Illinois, USA?

Illinois, USA currently has an ozone (O3) concentration of 50.494 ppm.

What is the current level of nitrogen dioxide (NO2) in Illinois, USA?

The current level of nitrogen dioxide (NO2) in Illinois, USA is 4.286 ppb.

Current air quality index in Illinois, USA today

Q: What is the PM2.5 concentration in Illinois, USA right now?

Illinois, USA currently has a PM2.5 concentration of 10.314 μg/m3.

Stay updated with real-time air quality in Illinois, USA 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)

Moderate

Illinois, USA

Last updated: ... (Local time)

Common air pollutants in Illinois, USA

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

10.31 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

45.90 μg/m³

155

255

425

605+

Ozone (O₃)

50.49 ppb

201

201+

Sulfur Dioxide (SO₂)

0.74 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.29 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Illinois, USA

Get Live Pollen Counts

Illinois, USA

Scroll To Air Quality Map

Track live Illinois, USA air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T01:00:00.000Z	49 \| good	5.789 \| good	30.63 \| good	53.122 \| good	0.391 \| good	5.065 \| good	0.233 \| good
2026-04-22T02:00:00.000Z	46 \| good	5.519 \| good	28.585 \| good	50.262 \| good	0.568 \| good	7.218 \| good	0.27 \| good
2026-04-22T03:00:00.000Z	41 \| good	5.29 \| good	24.156 \| good	43.761 \| good	0.554 \| good	6.247 \| good	0.244 \| good
2026-04-22T04:00:00.000Z	37 \| good	5.041 \| good	25.185 \| good	40.355 \| good	0.371 \| good	5.628 \| good	0.208 \| good
2026-04-22T05:00:00.000Z	38 \| good	6.522 \| good	30.627 \| good	36.348 \| good	0.446 \| good	5.632 \| good	0.195 \| good
2026-04-22T06:00:00.000Z	38 \| good	6.542 \| good	33.113 \| good	34.82 \| good	0.502 \| good	5.688 \| good	0.195 \| good
2026-04-22T07:00:00.000Z	33 \| good	5.445 \| good	26.068 \| good	36.271 \| good	0.596 \| good	7.672 \| good	0.182 \| good
2026-04-22T08:00:00.000Z	33 \| good	5.271 \| good	23.237 \| good	35.964 \| good	0.545 \| good	5.789 \| good	0.169 \| good
2026-04-22T09:00:00.000Z	31 \| good	5.132 \| good	20.957 \| good	32.921 \| good	0.374 \| good	5.473 \| good	0.182 \| good
2026-04-22T10:00:00.000Z	35 \| good	4.881 \| good	21.668 \| good	37.98 \| good	0.457 \| good	4.998 \| good	0.182 \| good
2026-04-22T11:00:00.000Z	36 \| good	4.794 \| good	29.868 \| good	38.629 \| good	0.388 \| good	6.92 \| good	0.195 \| good
2026-04-22T12:00:00.000Z	33 \| good	5.665 \| good	33.878 \| good	34.153 \| good	0.284 \| good	9.847 \| good	0.211 \| good
2026-04-22T13:00:00.000Z	31 \| good	4.083 \| good	20.868 \| good	32.827 \| good	0.358 \| good	10.826 \| good	0.228 \| good
2026-04-22T14:00:00.000Z	31 \| good	5.206 \| good	28.123 \| good	34.124 \| good	0.469 \| good	6.61 \| good	0.237 \| good
2026-04-22T15:00:00.000Z	44 \| good	7.538 \| good	41.765 \| good	34.552 \| good	0.477 \| good	5.817 \| good	0.199 \| good
2026-04-22T16:00:00.000Z	33 \| good	4.81 \| good	30.524 \| good	35.741 \| good	1.421 \| good	5.772 \| good	0.186 \| good
2026-04-22T17:00:00.000Z	40 \| good	5.172 \| good	42.964 \| good	39.25 \| good	1.358 \| good	5.867 \| good	0.172 \| good
2026-04-22T18:00:00.000Z	38 \| good	5.883 \| good	27.456 \| good	40.954 \| good	1.677 \| good	7.102 \| good	0.201 \| good
2026-04-22T19:00:00.000Z	41 \| good	6.224 \| good	30.254 \| good	44.352 \| good	2.782 \| good	7.314 \| good	0.201 \| good
2026-04-22T20:00:00.000Z	43 \| good	6.092 \| good	27.993 \| good	46.262 \| good	1.217 \| good	6.015 \| good	0.199 \| good
2026-04-22T21:00:00.000Z	44 \| good	5.278 \| good	26.199 \| good	46.569 \| good	1.01 \| good	5.603 \| good	0.182 \| good
2026-04-22T22:00:00.000Z	45 \| good	5.118 \| good	26.638 \| good	49.202 \| good	1.035 \| good	5.096 \| good	0.182 \| good
2026-04-22T23:00:00.000Z	46 \| good	6.719 \| good	37.69 \| good	50.292 \| good	0.986 \| good	5.15 \| good	0.199 \| good
2026-04-23T00:00:00.000Z	47 \| good	8.165 \| good	29.856 \| good	51.365 \| good	0.986 \| good	6.09 \| good	0.186 \| good
2026-04-23T01:00:00.000Z	43 \| good	5.783 \| good	37.074 \| good	46.465 \| good	0.716 \| good	4.096 \| good	0.199 \| good
2026-04-23T02:00:00.000Z	42 \| good	5.314 \| good	27.115 \| good	44.887 \| good	0.542 \| good	7.182 \| good	0.175 \| good
2026-04-23T03:00:00.000Z	36 \| good	6.444 \| good	24.972 \| good	38.541 \| good	0.683 \| good	6.508 \| good	0.208 \| good
2026-04-23T04:00:00.000Z	35 \| good	4.969 \| good	24.105 \| good	37.552 \| good	0.489 \| good	7.275 \| good	0.248 \| good
2026-04-23T05:00:00.000Z	34 \| good	5.022 \| good	26.105 \| good	37.442 \| good	0.458 \| good	7.66 \| good	0.162 \| good
2026-04-23T06:00:00.000Z	38 \| good	6.966 \| good	36.868 \| good	30.985 \| good	0.302 \| good	14.759 \| good	0.159 \| good
2026-04-23T07:00:00.000Z	28 \| good	5.359 \| good	22.631 \| good	30.248 \| good	0.437 \| good	16.073 \| good	0.146 \| good
2026-04-23T08:00:00.000Z	33 \| good	5.5 \| good	24.527 \| good	21.858 \| good	0.454 \| good	13.881 \| good	0.146 \| good
2026-04-23T09:00:00.000Z	33 \| good	5.533 \| good	23.972 \| good	21.335 \| good	0.38 \| good	13.952 \| good	0.146 \| good
2026-04-23T10:00:00.000Z	27 \| good	5.475 \| good	27.579 \| good	22.599 \| good	0.667 \| good	12.695 \| good	0.159 \| good
2026-04-23T11:00:00.000Z	33 \| good	6.048 \| good	35.74 \| good	22.376 \| good	0.559 \| good	13.929 \| good	0.188 \| good
2026-04-23T12:00:00.000Z	44 \| good	8.389 \| good	39.935 \| good	23.442 \| good	0.439 \| good	15.265 \| good	0.217 \| good
2026-04-23T13:00:00.000Z	35 \| good	6.212 \| good	37.705 \| good	21.186 \| good	0.37 \| good	11.802 \| good	0.233 \| good
2026-04-23T14:00:00.000Z	38 \| good	6.772 \| good	36.484 \| good	23.999 \| good	0.515 \| good	9.832 \| good	0.228 \| good
2026-04-23T15:00:00.000Z	38 \| good	6.774 \| good	27.382 \| good	26.185 \| good	0.626 \| good	7.992 \| good	0.199 \| good
2026-04-23T16:00:00.000Z	49 \| good	8.829 \| good	42.35 \| good	32.738 \| good	0.943 \| good	6.055 \| good	0.186 \| good
2026-04-23T17:00:00.000Z	55 \| moderate	9.219 \| good	63.427 \| fine	40.059 \| good	0.559 \| good	5.124 \| good	0.199 \| good
2026-04-23T18:00:00.000Z	52 \| moderate	9.654 \| good	44.527 \| good	44.57 \| good	0.857 \| good	4.263 \| good	0.162 \| good
2026-04-23T19:00:00.000Z	54 \| moderate	10.619 \| good	55.417 \| fine	50.176 \| good	0.954 \| good	4.093 \| good	0.162 \| good
2026-04-23T20:00:00.000Z	56 \| moderate	11.577 \| good	48.252 \| good	47.604 \| good	1.134 \| good	4.809 \| good	0.186 \| good
2026-04-23T21:00:00.000Z	52 \| moderate	9.624 \| good	37.35 \| good	47.125 \| good	1.204 \| good	4.268 \| good	0.186 \| good
2026-04-23T22:00:00.000Z	52 \| moderate	10.426 \| good	47.775 \| good	48.642 \| good	1.243 \| good	3.822 \| good	0.186 \| good
2026-04-23T23:00:00.000Z	52 \| moderate	10.033 \| good	45.345 \| good	47.361 \| good	1.24 \| good	3.444 \| good	0.162 \| good
2026-04-24T00:00:00.000Z	52 \| moderate	9.946 \| good	52.202 \| good	50.792 \| good	1.645 \| good	3.652 \| good	0.186 \| good
2026-04-24T00:00:00.000Z	52 \| moderate	10.314 \| good	45.898 \| good	50.494 \| good	0.737 \| good	4.286 \| good	0.185 \| good
2026-04-24T01:00:00.000Z	44 \| good	7.332 \| good	32.05 \| good	47.318 \| good	0.339 \| good	2.045 \| good	0.157 \| good
2026-04-24T02:00:00.000Z	39 \| good	7.204 \| good	31.954 \| good	42.28 \| good	0.339 \| good	1.971 \| good	0.156 \| good
2026-04-24T03:00:00.000Z	44 \| good	7.803 \| good	33.996 \| good	39.971 \| good	0.338 \| good	1.897 \| good	0.156 \| good
2026-04-24T04:00:00.000Z	44 \| good	7.957 \| good	34.946 \| good	39.703 \| good	0.375 \| good	1.856 \| good	0.153 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.262 \| good	36.027 \| good	40.97 \| good	0.413 \| good	1.814 \| good	0.151 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.053 \| good	31 \| good	39.85 \| good	0.451 \| good	1.773 \| good	0.148 \| good
2026-04-24T07:00:00.000Z	37 \| good	5.37 \| good	23.036 \| good	40.262 \| good	0.432 \| good	1.724 \| good	0.145 \| good
2026-04-24T08:00:00.000Z	35 \| good	5.038 \| good	21.974 \| good	38.27 \| good	0.414 \| good	1.674 \| good	0.142 \| good
2026-04-24T09:00:00.000Z	32 \| good	4.287 \| good	18.965 \| good	35.287 \| good	0.396 \| good	1.625 \| good	0.139 \| good
2026-04-24T10:00:00.000Z	36 \| good	2.586 \| good	10.15 \| good	39.442 \| good	0.386 \| good	1.737 \| good	0.138 \| good
2026-04-24T11:00:00.000Z	37 \| good	2.84 \| good	11.993 \| good	39.721 \| good	0.376 \| good	1.849 \| good	0.138 \| good
2026-04-24T12:00:00.000Z	34 \| good	3.772 \| good	16.073 \| good	36.523 \| good	0.366 \| good	1.96 \| good	0.137 \| good
2026-04-24T13:00:00.000Z	38 \| good	5.775 \| good	25.012 \| good	40.884 \| good	0.382 \| good	2.027 \| good	0.137 \| good
2026-04-24T14:00:00.000Z	37 \| good	6.489 \| good	28.993 \| good	40.119 \| good	0.397 \| good	2.094 \| good	0.138 \| good
2026-04-24T15:00:00.000Z	49 \| good	8.674 \| good	37.998 \| good	37.832 \| good	0.412 \| good	2.161 \| good	0.138 \| good
2026-04-24T16:00:00.000Z	44 \| good	7.617 \| good	33.865 \| good	39.766 \| good	0.409 \| good	1.749 \| good	0.136 \| good
2026-04-24T17:00:00.000Z	43 \| good	5.287 \| good	22.991 \| good	45.516 \| good	0.406 \| good	1.337 \| good	0.134 \| good
2026-04-24T18:00:00.000Z	44 \| good	4.655 \| good	20.026 \| good	47.597 \| good	0.402 \| good	0.925 \| good	0.132 \| good
2026-04-24T19:00:00.000Z	44 \| good	4.339 \| good	19.011 \| good	46.644 \| good	0.332 \| good	0.9 \| good	0.133 \| good
2026-04-24T20:00:00.000Z	44 \| good	3.761 \| good	16.085 \| good	48.204 \| good	0.261 \| good	0.875 \| good	0.134 \| good
2026-04-24T21:00:00.000Z	44 \| good	3.287 \| good	14.039 \| good	48.44 \| good	0.19 \| good	0.849 \| good	0.134 \| good
2026-04-24T22:00:00.000Z	44 \| good	3.288 \| good	14.049 \| good	47.714 \| good	0.197 \| good	1.373 \| good	0.14 \| good
2026-04-24T23:00:00.000Z	46 \| good	3.989 \| good	17.887 \| good	49.821 \| good	0.204 \| good	1.897 \| good	0.145 \| good
2026-04-25T00:00:00.000Z	44 \| good	3.109 \| good	13.839 \| good	47.376 \| good	0.211 \| good	2.421 \| good	0.151 \| good
2026-04-25T01:00:00.000Z	33 \| good	3.799 \| good	16.945 \| good	35.77 \| good	0.216 \| good	3.043 \| good	0.158 \| good
2026-04-25T02:00:00.000Z	32 \| good	3.601 \| good	15.959 \| good	35.064 \| good	0.221 \| good	3.664 \| good	0.165 \| good
2026-04-25T03:00:00.000Z	30 \| good	4.023 \| good	17.945 \| good	32.074 \| good	0.227 \| good	4.286 \| good	0.172 \| good
2026-04-25T04:00:00.000Z	27 \| good	5.218 \| good	22.995 \| good	27.086 \| good	0.219 \| good	3.949 \| good	0.17 \| good
2026-04-25T05:00:00.000Z	27 \| good	4.641 \| good	20.061 \| good	26.844 \| good	0.212 \| good	3.613 \| good	0.167 \| good
2026-04-25T06:00:00.000Z	27 \| good	5.382 \| good	23.063 \| good	24.788 \| good	0.205 \| good	3.277 \| good	0.164 \| good
2026-04-25T07:00:00.000Z	27 \| good	4.958 \| good	21.037 \| good	25.562 \| good	0.209 \| good	3.225 \| good	0.162 \| good
2026-04-25T08:00:00.000Z	22 \| good	4.32 \| good	18.938 \| good	24.484 \| good	0.213 \| good	3.172 \| good	0.161 \| good
2026-04-25T09:00:00.000Z	27 \| good	4.675 \| good	20.018 \| good	23.24 \| good	0.217 \| good	3.12 \| good	0.159 \| good
2026-04-25T10:00:00.000Z	27 \| good	5.416 \| good	23.019 \| good	28.011 \| good	0.306 \| good	3.236 \| good	0.161 \| good
2026-04-25T11:00:00.000Z	27 \| good	5.399 \| good	23 \| good	28.71 \| good	0.394 \| good	3.352 \| good	0.162 \| good
2026-04-25T12:00:00.000Z	28 \| good	4.881 \| good	21 \| good	29.675 \| good	0.482 \| good	3.468 \| good	0.164 \| good
2026-04-25T13:00:00.000Z	29 \| good	3.562 \| good	15.968 \| good	31.034 \| good	0.582 \| good	3.119 \| good	0.169 \| good
2026-04-25T14:00:00.000Z	31 \| good	4.493 \| good	19.918 \| good	34.136 \| good	0.682 \| good	2.77 \| good	0.174 \| good
2026-04-25T15:00:00.000Z	35 \| good	4.55 \| good	19.957 \| good	38.328 \| good	0.782 \| good	2.421 \| good	0.178 \| good
2026-04-25T16:00:00.000Z	41 \| good	3.788 \| good	16.067 \| good	43.673 \| good	0.785 \| good	1.923 \| good	0.171 \| good
2026-04-25T17:00:00.000Z	48 \| good	3.992 \| good	17.08 \| good	51.953 \| good	0.788 \| good	1.424 \| good	0.164 \| good
2026-04-25T18:00:00.000Z	54 \| moderate	3.991 \| good	17.072 \| good	55.966 \| fine	0.791 \| good	0.926 \| good	0.157 \| good
2026-04-25T19:00:00.000Z	64 \| moderate	4.537 \| good	19.957 \| good	58.811 \| fine	0.743 \| good	0.879 \| good	0.152 \| good
2026-04-25T20:00:00.000Z	71 \| moderate	5.03 \| good	21.935 \| good	60.897 \| fine	0.694 \| good	0.832 \| good	0.147 \| good
2026-04-25T21:00:00.000Z	64 \| moderate	3.471 \| good	15.043 \| good	58.993 \| fine	0.646 \| good	0.784 \| good	0.142 \| good
2026-04-25T22:00:00.000Z	67 \| moderate	3.76 \| good	16.054 \| good	60.376 \| fine	0.662 \| good	1.431 \| good	0.144 \| good
2026-04-25T23:00:00.000Z	61 \| moderate	3.422 \| good	15.039 \| good	57.529 \| fine	0.678 \| good	2.078 \| good	0.147 \| good
2026-04-26T00:00:00.000Z	58 \| moderate	3.268 \| good	3.846 \| good	57.468 \| fine	0.678 \| good	2.669 \| good	0.149 \| good

Illinois

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Illinois, USA

Air quality in cities of Illinois, USA

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
Swansea, Illinois	98 Moderate	11.14μg/m³ Good	149.21μg/m³ Fine	49.08ppb Good	0.79ppb Good	4.63ppb Good	0.23ppm Good
Chatham, Illinois	75 Moderate	9.39μg/m³ Good	103.46μg/m³ Fine	48.63ppb Good	0.60ppb Good	3.83ppb Good	0.20ppm Good
Lincoln, Illinois	71 Moderate	9.61μg/m³ Good	95.59μg/m³ Fine	53.88ppb Good	0.82ppb Good	3.70ppb Good	0.18ppm Good
La Grange, Illinois	71 Moderate	19.66μg/m³ Fine	86.95μg/m³ Fine	50.99ppb Good	0.63ppb Good	5.25ppb Good	0.20ppm Good
Brookfield, Illinois	69 Moderate	18.63μg/m³ Fine	82.48μg/m³ Fine	50.74ppb Good	0.63ppb Good	5.26ppb Good	0.20ppm Good
Granite City, Illinois	67 Moderate	11.67μg/m³ Good	86.81μg/m³ Fine	45.90ppb Good	0.71ppb Good	4.62ppb Good	0.22ppm Good
Fairview Heights, Illinois	66 Moderate	11.43μg/m³ Good	85.03μg/m³ Fine	49.38ppb Good	0.77ppb Good	4.65ppb Good	0.23ppm Good
La Grange Park, Illinois	66 Moderate	16.62μg/m³ Fine	73.70μg/m³ Fine	50.20ppb Good	0.63ppb Good	5.28ppb Good	0.20ppm Good
Western Springs, Illinois	64 Moderate	16.19μg/m³ Fine	71.83μg/m³ Fine	50.17ppb Good	0.63ppb Good	5.27ppb Good	0.20ppm Good
Summit, Illinois	62 Moderate	15.07μg/m³ Fine	66.85μg/m³ Fine	50.95ppb Good	0.63ppb Good	5.08ppb Good	0.20ppm Good
Westchester, Illinois	62 Moderate	15.27μg/m³ Fine	67.88μg/m³ Fine	49.55ppb Good	0.63ppb Good	5.33ppb Good	0.20ppm Good
Cahokia Heights, Illinois	61 Moderate	9.13μg/m³ Good	75.75μg/m³ Fine	45.23ppb Good	0.73ppb Good	4.68ppb Good	0.23ppm Good
Hinsdale, Illinois	62 Moderate	14.52μg/m³ Fine	63.66μg/m³ Fine	50.36ppb Good	0.62ppb Good	4.97ppb Good	0.19ppm Good
Justice, Illinois	60 Moderate	14.34μg/m³ Fine	63.66μg/m³ Fine	50.77ppb Good	0.63ppb Good	5.04ppb Good	0.20ppm Good
Springfield, Illinois	61 Moderate	10.09μg/m³ Good	44.98μg/m³ Good	57.95ppb Fine	0.87ppb Good	3.78ppb Good	0.20ppm Good
Belleville, Illinois	60 Moderate	11.18μg/m³ Good	73.33μg/m³ Fine	48.50ppb Good	0.80ppb Good	4.59ppb Good	0.23ppm Good
Bellwood, Illinois	60 Moderate	13.95μg/m³ Fine	62.23μg/m³ Fine	48.51ppb Good	0.63ppb Good	5.41ppb Good	0.19ppm Good
Maywood, Illinois	60 Moderate	13.88μg/m³ Fine	61.86μg/m³ Fine	49.08ppb Good	0.63ppb Good	5.39ppb Good	0.19ppm Good
Elmhurst, Illinois	58 Moderate	13.27μg/m³ Fine	59.02μg/m³ Fine	48.44ppb Good	0.62ppb Good	5.38ppb Good	0.18ppm Good
Hickory Hills, Illinois	60 Moderate	13.60μg/m³ Fine	60.42μg/m³ Fine	50.64ppb Good	0.63ppb Good	5.00ppb Good	0.20ppm Good
Lyons, Illinois	58 Moderate	13.23μg/m³ Fine	58.79μg/m³ Fine	50.83ppb Good	0.63ppb Good	5.04ppb Good	0.20ppm Good
Westmont, Illinois	60 Moderate	13.64μg/m³ Fine	66.92μg/m³ Fine	51.81ppb Good	0.61ppb Good	4.80ppb Good	0.16ppm Good
Berwyn, Illinois	58 Moderate	12.88μg/m³ Fine	57.33μg/m³ Fine	49.79ppb Good	0.63ppb Good	5.41ppb Good	0.20ppm Good
Burr Ridge, Illinois	58 Moderate	12.96μg/m³ Fine	55.66μg/m³ Fine	51.10ppb Good	0.62ppb Good	4.68ppb Good	0.20ppm Good
Bridgeview, Illinois	58 Moderate	12.75μg/m³ Fine	56.69μg/m³ Fine	50.75ppb Good	0.63ppb Good	4.99ppb Good	0.20ppm Good
Melrose Park, Illinois	58 Moderate	13.11μg/m³ Fine	58.32μg/m³ Fine	48.10ppb Good	0.62ppb Good	5.56ppb Good	0.19ppm Good
Northlake, Illinois	58 Moderate	12.68μg/m³ Fine	56.63μg/m³ Fine	46.93ppb Good	0.62ppb Good	5.54ppb Good	0.17ppm Good
Palos Hills, Illinois	58 Moderate	12.79μg/m³ Fine	56.43μg/m³ Fine	50.72ppb Good	0.63ppb Good	4.79ppb Good	0.20ppm Good
Bensenville, Illinois	56 Moderate	12.47μg/m³ Fine	55.65μg/m³ Fine	47.38ppb Good	0.61ppb Good	5.55ppb Good	0.17ppm Good
Forest Park, Illinois	58 Moderate	12.62μg/m³ Fine	56.19μg/m³ Fine	49.71ppb Good	0.63ppb Good	5.45ppb Good	0.20ppm Good
Franklin Park, Illinois	56 Moderate	12.37μg/m³ Fine	55.40μg/m³ Fine	46.29ppb Good	0.61ppb Good	5.57ppb Good	0.17ppm Good
Schiller Park, Illinois	56 Moderate	12.15μg/m³ Fine	54.71μg/m³ Fine	45.24ppb Good	0.61ppb Good	5.60ppb Good	0.16ppm Good
Villa Park, Illinois	58 Moderate	12.57μg/m³ Fine	56.05μg/m³ Fine	49.18ppb Good	0.61ppb Good	5.15ppb Good	0.17ppm Good
Burbank, Illinois	56 Moderate	11.93μg/m³ Good	53.10μg/m³ Good	50.42ppb Good	0.64ppb Good	4.98ppb Good	0.20ppm Good
Pontiac, Illinois	56 Moderate	11.66μg/m³ Good	38.73μg/m³ Good	52.64ppb Good	0.84ppb Good	2.14ppb Good	0.15ppm Good
Charleston, Illinois	54 Moderate	11.46μg/m³ Good	45.94μg/m³ Good	53.44ppb Good	1.56ppb Good	7.06ppb Good	0.20ppm Good
Chicago Ridge, Illinois	54 Moderate	11.26μg/m³ Good	50.21μg/m³ Good	50.24ppb Good	0.64ppb Good	4.74ppb Good	0.20ppm Good
Des Plaines, Illinois	54 Moderate	11.14μg/m³ Good	48.47μg/m³ Good	49.58ppb Good	0.61ppb Good	5.59ppb Good	0.17ppm Good
Darien, Illinois	54 Moderate	11.26μg/m³ Good	47.49μg/m³ Good	51.36ppb Good	0.61ppb Good	4.42ppb Good	0.19ppm Good
Dolton, Illinois	54 Moderate	11.29μg/m³ Good	49.11μg/m³ Good	52.93ppb Good	0.65ppb Good	3.80ppb Good	0.21ppm Good
Elk Grove Village, Illinois	54 Moderate	11.20μg/m³ Good	48.08μg/m³ Good	48.66ppb Good	0.61ppb Good	5.58ppb Good	0.17ppm Good
Elmwood Park, Illinois	54 Moderate	11.24μg/m³ Good	49.72μg/m³ Good	48.89ppb Good	0.62ppb Good	5.49ppb Good	0.19ppm Good
Lincolnwood, Illinois	54 Moderate	11.19μg/m³ Good	48.53μg/m³ Good	50.68ppb Good	0.62ppb Good	5.20ppb Good	0.20ppm Good
Lombard, Illinois	54 Moderate	11.31μg/m³ Good	49.93μg/m³ Good	49.85ppb Good	0.60ppb Good	4.95ppb Good	0.17ppm Good
Mattoon, Illinois	54 Moderate	11.08μg/m³ Good	46.94μg/m³ Good	54.06ppb Fine	1.46ppb Good	4.26ppb Good	0.20ppm Good
Norridge, Illinois	54 Moderate	11.20μg/m³ Good	48.91μg/m³ Good	49.88ppb Good	0.62ppb Good	5.61ppb Good	0.19ppm Good
Oak Park, Illinois	54 Moderate	11.36μg/m³ Good	50.62μg/m³ Good	49.36ppb Good	0.64ppb Good	5.50ppb Good	0.20ppm Good
Palos Heights, Illinois	54 Moderate	11.11μg/m³ Good	49.54μg/m³ Good	50.20ppb Good	0.64ppb Good	4.66ppb Good	0.20ppm Good
Park Ridge, Illinois	54 Moderate	11.21μg/m³ Good	48.55μg/m³ Good	49.48ppb Good	0.61ppb Good	5.59ppb Good	0.18ppm Good
River Grove, Illinois	54 Moderate	11.49μg/m³ Good	51.07μg/m³ Good	47.90ppb Good	0.62ppb Good	5.53ppb Good	0.18ppm Good

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
No results found

0.19ppm

How accurate is Illinois, USA air quality data?

The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

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 does the air quality data for Illinois, USA get updated?

Air quality updates for Illinois, USA are available every hour.

What time in the past 24 hours saw the poorest air quality in Illinois, USA?

Illinois, USA experienced its worst air quality at 08:00:00, 2026-04-23.

When was air quality in Illinois, USA the best over the past 24 hours?

The best air quality in Illinois, USA was observed at 10:00:00 on 2026-04-23.

What is the air quality in Illinois, USA right now?

The air quality in Illinois, USA right now is Moderate, with an AQI of 52.

What pollutant is most frequently found in Illinois, USA?

In Illinois, USA, PM2.5 is the most frequently found pollutant.

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

When air quality in Illinois, USA is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Illinois, USA right now?

Illinois, USA currently has a PM_2.5 concentration of 10.314 μg/m³.

What is the current level of PM₁₀ in Illinois, USA?

Illinois, USA currently has a PM₁₀ concentration of 45.898 μg/m³.

What is the current level of carbon monoxide (CO) in Illinois, USA?

The current carbon monoxide (CO) level in Illinois, USA is 0.185 ppm.

What is the current level of sulfur dioxide (SO₂) in Illinois, USA?

The current sulfur dioxide (SO₂) concentration in Illinois, USA is 0.737 ppb.

What is the current level of ozone (O₃) in Illinois, USA?

Illinois, USA currently has an ozone (O₃) concentration of 50.494 ppm.

What is the current level of nitrogen dioxide (NO₂) in Illinois, USA?

The current level of nitrogen dioxide (NO₂) in Illinois, USA is 4.286 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T01:00:00.000Z	49 \| good	5.789 \| good	30.63 \| good	53.122 \| good	0.391 \| good	5.065 \| good	0.233 \| good
2026-04-22T02:00:00.000Z	46 \| good	5.519 \| good	28.585 \| good	50.262 \| good	0.568 \| good	7.218 \| good	0.27 \| good
2026-04-22T03:00:00.000Z	41 \| good	5.29 \| good	24.156 \| good	43.761 \| good	0.554 \| good	6.247 \| good	0.244 \| good
2026-04-22T04:00:00.000Z	37 \| good	5.041 \| good	25.185 \| good	40.355 \| good	0.371 \| good	5.628 \| good	0.208 \| good
2026-04-22T05:00:00.000Z	38 \| good	6.522 \| good	30.627 \| good	36.348 \| good	0.446 \| good	5.632 \| good	0.195 \| good
2026-04-22T06:00:00.000Z	38 \| good	6.542 \| good	33.113 \| good	34.82 \| good	0.502 \| good	5.688 \| good	0.195 \| good
2026-04-22T07:00:00.000Z	33 \| good	5.445 \| good	26.068 \| good	36.271 \| good	0.596 \| good	7.672 \| good	0.182 \| good
2026-04-22T08:00:00.000Z	33 \| good	5.271 \| good	23.237 \| good	35.964 \| good	0.545 \| good	5.789 \| good	0.169 \| good
2026-04-22T09:00:00.000Z	31 \| good	5.132 \| good	20.957 \| good	32.921 \| good	0.374 \| good	5.473 \| good	0.182 \| good
2026-04-22T10:00:00.000Z	35 \| good	4.881 \| good	21.668 \| good	37.98 \| good	0.457 \| good	4.998 \| good	0.182 \| good
2026-04-22T11:00:00.000Z	36 \| good	4.794 \| good	29.868 \| good	38.629 \| good	0.388 \| good	6.92 \| good	0.195 \| good
2026-04-22T12:00:00.000Z	33 \| good	5.665 \| good	33.878 \| good	34.153 \| good	0.284 \| good	9.847 \| good	0.211 \| good
2026-04-22T13:00:00.000Z	31 \| good	4.083 \| good	20.868 \| good	32.827 \| good	0.358 \| good	10.826 \| good	0.228 \| good
2026-04-22T14:00:00.000Z	31 \| good	5.206 \| good	28.123 \| good	34.124 \| good	0.469 \| good	6.61 \| good	0.237 \| good
2026-04-22T15:00:00.000Z	44 \| good	7.538 \| good	41.765 \| good	34.552 \| good	0.477 \| good	5.817 \| good	0.199 \| good
2026-04-22T16:00:00.000Z	33 \| good	4.81 \| good	30.524 \| good	35.741 \| good	1.421 \| good	5.772 \| good	0.186 \| good
2026-04-22T17:00:00.000Z	40 \| good	5.172 \| good	42.964 \| good	39.25 \| good	1.358 \| good	5.867 \| good	0.172 \| good
2026-04-22T18:00:00.000Z	38 \| good	5.883 \| good	27.456 \| good	40.954 \| good	1.677 \| good	7.102 \| good	0.201 \| good
2026-04-22T19:00:00.000Z	41 \| good	6.224 \| good	30.254 \| good	44.352 \| good	2.782 \| good	7.314 \| good	0.201 \| good
2026-04-22T20:00:00.000Z	43 \| good	6.092 \| good	27.993 \| good	46.262 \| good	1.217 \| good	6.015 \| good	0.199 \| good
2026-04-22T21:00:00.000Z	44 \| good	5.278 \| good	26.199 \| good	46.569 \| good	1.01 \| good	5.603 \| good	0.182 \| good
2026-04-22T22:00:00.000Z	45 \| good	5.118 \| good	26.638 \| good	49.202 \| good	1.035 \| good	5.096 \| good	0.182 \| good
2026-04-22T23:00:00.000Z	46 \| good	6.719 \| good	37.69 \| good	50.292 \| good	0.986 \| good	5.15 \| good	0.199 \| good
2026-04-23T00:00:00.000Z	47 \| good	8.165 \| good	29.856 \| good	51.365 \| good	0.986 \| good	6.09 \| good	0.186 \| good
2026-04-23T01:00:00.000Z	43 \| good	5.783 \| good	37.074 \| good	46.465 \| good	0.716 \| good	4.096 \| good	0.199 \| good
2026-04-23T02:00:00.000Z	42 \| good	5.314 \| good	27.115 \| good	44.887 \| good	0.542 \| good	7.182 \| good	0.175 \| good
2026-04-23T03:00:00.000Z	36 \| good	6.444 \| good	24.972 \| good	38.541 \| good	0.683 \| good	6.508 \| good	0.208 \| good
2026-04-23T04:00:00.000Z	35 \| good	4.969 \| good	24.105 \| good	37.552 \| good	0.489 \| good	7.275 \| good	0.248 \| good
2026-04-23T05:00:00.000Z	34 \| good	5.022 \| good	26.105 \| good	37.442 \| good	0.458 \| good	7.66 \| good	0.162 \| good
2026-04-23T06:00:00.000Z	38 \| good	6.966 \| good	36.868 \| good	30.985 \| good	0.302 \| good	14.759 \| good	0.159 \| good
2026-04-23T07:00:00.000Z	28 \| good	5.359 \| good	22.631 \| good	30.248 \| good	0.437 \| good	16.073 \| good	0.146 \| good
2026-04-23T08:00:00.000Z	33 \| good	5.5 \| good	24.527 \| good	21.858 \| good	0.454 \| good	13.881 \| good	0.146 \| good
2026-04-23T09:00:00.000Z	33 \| good	5.533 \| good	23.972 \| good	21.335 \| good	0.38 \| good	13.952 \| good	0.146 \| good
2026-04-23T10:00:00.000Z	27 \| good	5.475 \| good	27.579 \| good	22.599 \| good	0.667 \| good	12.695 \| good	0.159 \| good
2026-04-23T11:00:00.000Z	33 \| good	6.048 \| good	35.74 \| good	22.376 \| good	0.559 \| good	13.929 \| good	0.188 \| good
2026-04-23T12:00:00.000Z	44 \| good	8.389 \| good	39.935 \| good	23.442 \| good	0.439 \| good	15.265 \| good	0.217 \| good
2026-04-23T13:00:00.000Z	35 \| good	6.212 \| good	37.705 \| good	21.186 \| good	0.37 \| good	11.802 \| good	0.233 \| good
2026-04-23T14:00:00.000Z	38 \| good	6.772 \| good	36.484 \| good	23.999 \| good	0.515 \| good	9.832 \| good	0.228 \| good
2026-04-23T15:00:00.000Z	38 \| good	6.774 \| good	27.382 \| good	26.185 \| good	0.626 \| good	7.992 \| good	0.199 \| good
2026-04-23T16:00:00.000Z	49 \| good	8.829 \| good	42.35 \| good	32.738 \| good	0.943 \| good	6.055 \| good	0.186 \| good
2026-04-23T17:00:00.000Z	55 \| moderate	9.219 \| good	63.427 \| fine	40.059 \| good	0.559 \| good	5.124 \| good	0.199 \| good
2026-04-23T18:00:00.000Z	52 \| moderate	9.654 \| good	44.527 \| good	44.57 \| good	0.857 \| good	4.263 \| good	0.162 \| good
2026-04-23T19:00:00.000Z	54 \| moderate	10.619 \| good	55.417 \| fine	50.176 \| good	0.954 \| good	4.093 \| good	0.162 \| good
2026-04-23T20:00:00.000Z	56 \| moderate	11.577 \| good	48.252 \| good	47.604 \| good	1.134 \| good	4.809 \| good	0.186 \| good
2026-04-23T21:00:00.000Z	52 \| moderate	9.624 \| good	37.35 \| good	47.125 \| good	1.204 \| good	4.268 \| good	0.186 \| good
2026-04-23T22:00:00.000Z	52 \| moderate	10.426 \| good	47.775 \| good	48.642 \| good	1.243 \| good	3.822 \| good	0.186 \| good
2026-04-23T23:00:00.000Z	52 \| moderate	10.033 \| good	45.345 \| good	47.361 \| good	1.24 \| good	3.444 \| good	0.162 \| good
2026-04-24T00:00:00.000Z	52 \| moderate	9.946 \| good	52.202 \| good	50.792 \| good	1.645 \| good	3.652 \| good	0.186 \| good
2026-04-24T00:00:00.000Z	52 \| moderate	10.314 \| good	45.898 \| good	50.494 \| good	0.737 \| good	4.286 \| good	0.185 \| good
2026-04-24T01:00:00.000Z	44 \| good	7.332 \| good	32.05 \| good	47.318 \| good	0.339 \| good	2.045 \| good	0.157 \| good
2026-04-24T02:00:00.000Z	39 \| good	7.204 \| good	31.954 \| good	42.28 \| good	0.339 \| good	1.971 \| good	0.156 \| good
2026-04-24T03:00:00.000Z	44 \| good	7.803 \| good	33.996 \| good	39.971 \| good	0.338 \| good	1.897 \| good	0.156 \| good
2026-04-24T04:00:00.000Z	44 \| good	7.957 \| good	34.946 \| good	39.703 \| good	0.375 \| good	1.856 \| good	0.153 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.262 \| good	36.027 \| good	40.97 \| good	0.413 \| good	1.814 \| good	0.151 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.053 \| good	31 \| good	39.85 \| good	0.451 \| good	1.773 \| good	0.148 \| good
2026-04-24T07:00:00.000Z	37 \| good	5.37 \| good	23.036 \| good	40.262 \| good	0.432 \| good	1.724 \| good	0.145 \| good
2026-04-24T08:00:00.000Z	35 \| good	5.038 \| good	21.974 \| good	38.27 \| good	0.414 \| good	1.674 \| good	0.142 \| good
2026-04-24T09:00:00.000Z	32 \| good	4.287 \| good	18.965 \| good	35.287 \| good	0.396 \| good	1.625 \| good	0.139 \| good
2026-04-24T10:00:00.000Z	36 \| good	2.586 \| good	10.15 \| good	39.442 \| good	0.386 \| good	1.737 \| good	0.138 \| good
2026-04-24T11:00:00.000Z	37 \| good	2.84 \| good	11.993 \| good	39.721 \| good	0.376 \| good	1.849 \| good	0.138 \| good
2026-04-24T12:00:00.000Z	34 \| good	3.772 \| good	16.073 \| good	36.523 \| good	0.366 \| good	1.96 \| good	0.137 \| good
2026-04-24T13:00:00.000Z	38 \| good	5.775 \| good	25.012 \| good	40.884 \| good	0.382 \| good	2.027 \| good	0.137 \| good
2026-04-24T14:00:00.000Z	37 \| good	6.489 \| good	28.993 \| good	40.119 \| good	0.397 \| good	2.094 \| good	0.138 \| good
2026-04-24T15:00:00.000Z	49 \| good	8.674 \| good	37.998 \| good	37.832 \| good	0.412 \| good	2.161 \| good	0.138 \| good
2026-04-24T16:00:00.000Z	44 \| good	7.617 \| good	33.865 \| good	39.766 \| good	0.409 \| good	1.749 \| good	0.136 \| good
2026-04-24T17:00:00.000Z	43 \| good	5.287 \| good	22.991 \| good	45.516 \| good	0.406 \| good	1.337 \| good	0.134 \| good
2026-04-24T18:00:00.000Z	44 \| good	4.655 \| good	20.026 \| good	47.597 \| good	0.402 \| good	0.925 \| good	0.132 \| good
2026-04-24T19:00:00.000Z	44 \| good	4.339 \| good	19.011 \| good	46.644 \| good	0.332 \| good	0.9 \| good	0.133 \| good
2026-04-24T20:00:00.000Z	44 \| good	3.761 \| good	16.085 \| good	48.204 \| good	0.261 \| good	0.875 \| good	0.134 \| good
2026-04-24T21:00:00.000Z	44 \| good	3.287 \| good	14.039 \| good	48.44 \| good	0.19 \| good	0.849 \| good	0.134 \| good
2026-04-24T22:00:00.000Z	44 \| good	3.288 \| good	14.049 \| good	47.714 \| good	0.197 \| good	1.373 \| good	0.14 \| good
2026-04-24T23:00:00.000Z	46 \| good	3.989 \| good	17.887 \| good	49.821 \| good	0.204 \| good	1.897 \| good	0.145 \| good
2026-04-25T00:00:00.000Z	44 \| good	3.109 \| good	13.839 \| good	47.376 \| good	0.211 \| good	2.421 \| good	0.151 \| good
2026-04-25T01:00:00.000Z	33 \| good	3.799 \| good	16.945 \| good	35.77 \| good	0.216 \| good	3.043 \| good	0.158 \| good
2026-04-25T02:00:00.000Z	32 \| good	3.601 \| good	15.959 \| good	35.064 \| good	0.221 \| good	3.664 \| good	0.165 \| good
2026-04-25T03:00:00.000Z	30 \| good	4.023 \| good	17.945 \| good	32.074 \| good	0.227 \| good	4.286 \| good	0.172 \| good
2026-04-25T04:00:00.000Z	27 \| good	5.218 \| good	22.995 \| good	27.086 \| good	0.219 \| good	3.949 \| good	0.17 \| good
2026-04-25T05:00:00.000Z	27 \| good	4.641 \| good	20.061 \| good	26.844 \| good	0.212 \| good	3.613 \| good	0.167 \| good
2026-04-25T06:00:00.000Z	27 \| good	5.382 \| good	23.063 \| good	24.788 \| good	0.205 \| good	3.277 \| good	0.164 \| good
2026-04-25T07:00:00.000Z	27 \| good	4.958 \| good	21.037 \| good	25.562 \| good	0.209 \| good	3.225 \| good	0.162 \| good
2026-04-25T08:00:00.000Z	22 \| good	4.32 \| good	18.938 \| good	24.484 \| good	0.213 \| good	3.172 \| good	0.161 \| good
2026-04-25T09:00:00.000Z	27 \| good	4.675 \| good	20.018 \| good	23.24 \| good	0.217 \| good	3.12 \| good	0.159 \| good
2026-04-25T10:00:00.000Z	27 \| good	5.416 \| good	23.019 \| good	28.011 \| good	0.306 \| good	3.236 \| good	0.161 \| good
2026-04-25T11:00:00.000Z	27 \| good	5.399 \| good	23 \| good	28.71 \| good	0.394 \| good	3.352 \| good	0.162 \| good
2026-04-25T12:00:00.000Z	28 \| good	4.881 \| good	21 \| good	29.675 \| good	0.482 \| good	3.468 \| good	0.164 \| good
2026-04-25T13:00:00.000Z	29 \| good	3.562 \| good	15.968 \| good	31.034 \| good	0.582 \| good	3.119 \| good	0.169 \| good
2026-04-25T14:00:00.000Z	31 \| good	4.493 \| good	19.918 \| good	34.136 \| good	0.682 \| good	2.77 \| good	0.174 \| good
2026-04-25T15:00:00.000Z	35 \| good	4.55 \| good	19.957 \| good	38.328 \| good	0.782 \| good	2.421 \| good	0.178 \| good
2026-04-25T16:00:00.000Z	41 \| good	3.788 \| good	16.067 \| good	43.673 \| good	0.785 \| good	1.923 \| good	0.171 \| good
2026-04-25T17:00:00.000Z	48 \| good	3.992 \| good	17.08 \| good	51.953 \| good	0.788 \| good	1.424 \| good	0.164 \| good
2026-04-25T18:00:00.000Z	54 \| moderate	3.991 \| good	17.072 \| good	55.966 \| fine	0.791 \| good	0.926 \| good	0.157 \| good
2026-04-25T19:00:00.000Z	64 \| moderate	4.537 \| good	19.957 \| good	58.811 \| fine	0.743 \| good	0.879 \| good	0.152 \| good
2026-04-25T20:00:00.000Z	71 \| moderate	5.03 \| good	21.935 \| good	60.897 \| fine	0.694 \| good	0.832 \| good	0.147 \| good
2026-04-25T21:00:00.000Z	64 \| moderate	3.471 \| good	15.043 \| good	58.993 \| fine	0.646 \| good	0.784 \| good	0.142 \| good
2026-04-25T22:00:00.000Z	67 \| moderate	3.76 \| good	16.054 \| good	60.376 \| fine	0.662 \| good	1.431 \| good	0.144 \| good
2026-04-25T23:00:00.000Z	61 \| moderate	3.422 \| good	15.039 \| good	57.529 \| fine	0.678 \| good	2.078 \| good	0.147 \| good
2026-04-26T00:00:00.000Z	58 \| moderate	3.268 \| good	3.846 \| good	57.468 \| fine	0.678 \| good	2.669 \| good	0.149 \| good

Current air quality index in Illinois, USA today

Common air pollutants in Illinois, USA

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Illinois, USA air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Illinois, USA

Air quality in cities of Illinois, USA

Air quality in nearby states

Indiana, USA

Iowa, USA

Wisconsin, USA

Missouri, USA

Michigan, USA

Kentucky, USA

How accurate is Illinois, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently does the air quality data for Illinois, USA get updated?

What time in the past 24 hours saw the poorest air quality in Illinois, USA?

When was air quality in Illinois, USA the best over the past 24 hours?

What is the air quality in Illinois, USA right now?

What pollutant is most frequently found in Illinois, USA?

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

What is the PM2.5 concentration in Illinois, USA right now?

What is the current level of PM10 in Illinois, USA?

What is the current level of carbon monoxide (CO) in Illinois, USA?

What is the current level of sulfur dioxide (SO2) in Illinois, USA?

What is the current level of ozone (O3) in Illinois, USA?

What is the current level of nitrogen dioxide (NO2) in Illinois, USA?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Illinois, USA right now?

What is the current level of PM₁₀ in Illinois, USA?

What is the current level of sulfur dioxide (SO₂) in Illinois, USA?

What is the current level of ozone (O₃) in Illinois, USA?

What is the current level of nitrogen dioxide (NO₂) in Illinois, USA?