What is the PM10 level in Markham, Illinois at the moment?

The PM10 concentration in Markham, Illinois is 72.276 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Markham, Illinois at the moment?

Currently, Markham, Illinois has a sulfur dioxide (SO2) concentration of 2.466 ppb.

What is the ozone (O3) level in Markham, Illinois at the moment?

The current ozone (O3) level in Markham, Illinois at the moment is 29.34 ppm.

What is the nitrogen dioxide (NO2) level in Markham, Illinois at the moment?

Nitrogen dioxide (NO2) level in Markham, Illinois at the moment is 12.864 ppb.

Live air quality index in Markham, Illinois today

Q: What is the PM2.5 level in Markham, Illinois at the moment?

PM2.5 levels in Markham, Illinois are currently 16.134 μg/m3.

Stay updated with real-time air quality in Markham, 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)

Moderate

Markham, Illinois

Last updated: ... (Local time)

Major air pollutants in Markham, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

16.13 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

72.28 μg/m³

155

255

425

605+

Ozone (O₃)

29.34 ppb

201

201+

Sulfur Dioxide (SO₂)

2.47 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

12.86 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Markham, Illinois

Get Live Pollen Counts

Markham, Illinois

Scroll To Air Quality Map

Track live Markham, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T21:00:00.000Z	60 \| moderate	13.513 \| fine	60.332 \| fine	33.639 \| good	5.534 \| good	9.408 \| good	0.208 \| good
2026-10-20T22:00:00.000Z	60 \| moderate	13.843 \| fine	61.909 \| fine	36.282 \| good	9.1 \| good	8.524 \| good	0.208 \| good
2026-10-20T23:00:00.000Z	58 \| moderate	13.23 \| fine	59.48 \| fine	38.255 \| good	4.707 \| good	25.219 \| good	0.224 \| good
2026-10-21T00:00:00.000Z	56 \| moderate	11.576 \| good	51.613 \| good	35.16 \| good	1.162 \| good	24.766 \| good	0.267 \| good
2026-10-21T01:00:00.000Z	56 \| moderate	11.777 \| good	52.567 \| good	35.118 \| good	0.849 \| good	30.204 \| good	0.284 \| good
2026-10-21T02:00:00.000Z	58 \| moderate	12.776 \| fine	57.17 \| fine	27.978 \| good	0.704 \| good	28.704 \| good	0.3 \| good
2026-10-21T03:00:00.000Z	60 \| moderate	13.741 \| fine	61.572 \| fine	9.162 \| good	2.755 \| good	33.101 \| good	0.301 \| good
2026-10-21T04:00:00.000Z	66 \| moderate	17.181 \| fine	75.646 \| fine	21.119 \| good	0.658 \| good	24.683 \| good	0.299 \| good
2026-10-21T05:00:00.000Z	69 \| moderate	18.698 \| fine	82.43 \| fine	15.904 \| good	1.503 \| good	22.865 \| good	0.283 \| good
2026-10-21T06:00:00.000Z	69 \| moderate	18.672 \| fine	82.43 \| fine	10.683 \| good	1.977 \| good	22.762 \| good	0.27 \| good
2026-10-21T07:00:00.000Z	69 \| moderate	19.478 \| fine	86.629 \| fine	5.128 \| good	1.729 \| good	22.67 \| good	0.286 \| good
2026-10-21T08:00:00.000Z	71 \| moderate	20.065 \| fine	82.277 \| fine	6.107 \| good	1.008 \| good	21.116 \| good	0.257 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	20.611 \| fine	84.776 \| fine	6.175 \| good	0.998 \| good	22.482 \| good	0.241 \| good
2026-10-21T10:00:00.000Z	73 \| moderate	21.192 \| fine	87.725 \| fine	8.606 \| good	1.04 \| good	23.138 \| good	0.286 \| good
2026-10-21T11:00:00.000Z	73 \| moderate	21.148 \| fine	87.551 \| fine	3.64 \| good	1.105 \| good	23.844 \| good	0.345 \| good
2026-10-21T12:00:00.000Z	75 \| moderate	22.205 \| fine	97.827 \| fine	5.449 \| good	1.082 \| good	23.633 \| good	0.358 \| good
2026-10-21T13:00:00.000Z	75 \| moderate	22.222 \| fine	98.001 \| fine	2.896 \| good	1.119 \| good	20.17 \| good	0.358 \| good
2026-10-21T14:00:00.000Z	79 \| moderate	24.258 \| fine	106.027 \| fine	4.453 \| good	1.211 \| good	22.588 \| good	0.466 \| good
2026-10-21T15:00:00.000Z	79 \| moderate	24.214 \| fine	105.854 \| fine	8.128 \| good	1.81 \| good	23.985 \| good	0.394 \| good
2026-10-21T16:00:00.000Z	73 \| moderate	20.984 \| fine	92.143 \| fine	10.426 \| good	2.096 \| good	21.549 \| good	0.299 \| good
2026-10-21T17:00:00.000Z	67 \| moderate	17.924 \| fine	79.764 \| fine	18.689 \| good	1.978 \| good	20.143 \| good	0.25 \| good
2026-10-21T18:00:00.000Z	62 \| moderate	15.008 \| fine	67.539 \| fine	26.212 \| good	2.139 \| good	14.818 \| good	0.237 \| good
2026-10-21T19:00:00.000Z	62 \| moderate	14.835 \| fine	66.846 \| fine	34.757 \| good	1.316 \| good	11.034 \| good	0.237 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	11.202 \| good	50.141 \| good	40.072 \| good	1.348 \| good	6.288 \| good	0.237 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.525 \| good	42.361 \| good	43.985 \| good	1.429 \| good	6.919 \| good	0.237 \| good
2026-10-21T22:00:00.000Z	44 \| good	8.455 \| good	38.104 \| good	47.859 \| good	1.774 \| good	11.522 \| good	0.237 \| good
2026-10-21T23:00:00.000Z	45 \| good	8.466 \| good	37.914 \| good	48.667 \| good	2.339 \| good	24.387 \| good	0.254 \| good
2026-10-22T00:00:00.000Z	54 \| moderate	10.865 \| good	48.595 \| good	43.552 \| good	1.687 \| good	18.126 \| good	0.313 \| good
2026-10-22T01:00:00.000Z	60 \| moderate	14.065 \| fine	62.801 \| fine	28.803 \| good	1.229 \| good	20.164 \| good	0.356 \| good
2026-10-22T02:00:00.000Z	66 \| moderate	17.066 \| fine	75.488 \| fine	21.009 \| good	0.975 \| good	25.503 \| good	0.372 \| good
2026-10-22T03:00:00.000Z	52 \| moderate	10.185 \| good	45.509 \| good	7.705 \| good	3.551 \| good	43.932 \| good	0.584 \| good
2026-10-22T04:00:00.000Z	71 \| moderate	20.271 \| fine	89.124 \| fine	9.562 \| good	1.81 \| good	34.201 \| good	0.417 \| good
2026-10-22T05:00:00.000Z	77 \| moderate	22.501 \| fine	98.884 \| fine	8.435 \| good	1.495 \| good	31.733 \| good	0.385 \| good
2026-10-22T06:00:00.000Z	75 \| moderate	22.27 \| fine	97.089 \| fine	1.869 \| good	1.44 \| good	27.416 \| good	0.411 \| good
2026-10-22T07:00:00.000Z	75 \| moderate	22.486 \| fine	97.956 \| fine	2.987 \| good	1.476 \| good	27.066 \| good	0.411 \| good
2026-10-22T08:00:00.000Z	75 \| moderate	21.679 \| fine	89.954 \| fine	2.518 \| good	1.399 \| good	26.343 \| good	0.34 \| good
2026-10-22T09:00:00.000Z	75 \| moderate	21.644 \| fine	89.78 \| fine	1.091 \| good	1.569 \| good	23.793 \| good	0.323 \| good
2026-10-22T10:00:00.000Z	73 \| moderate	21.064 \| fine	88.143 \| fine	5.178 \| good	1.387 \| good	20.963 \| good	0.31 \| good
2026-10-22T11:00:00.000Z	73 \| moderate	21.037 \| fine	88.337 \| fine	3.973 \| good	1.376 \| good	21.652 \| good	0.416 \| good
2026-10-22T12:00:00.000Z	73 \| moderate	20.995 \| fine	92.627 \| fine	2.781 \| good	1.45 \| good	22.607 \| good	0.475 \| good
2026-10-22T13:00:00.000Z	73 \| moderate	21.304 \| fine	94.357 \| fine	4.131 \| good	1.713 \| good	20.646 \| good	0.434 \| good
2026-10-22T14:00:00.000Z	75 \| moderate	22.226 \| fine	97.87 \| fine	4.983 \| good	1.737 \| good	18.751 \| good	0.476 \| good
2026-10-22T15:00:00.000Z	79 \| moderate	23.774 \| fine	104.244 \| fine	7.663 \| good	2.218 \| good	21.819 \| good	0.49 \| good
2026-10-22T16:00:00.000Z	79 \| moderate	23.83 \| fine	104.741 \| fine	11.848 \| good	2.62 \| good	29.106 \| good	0.333 \| good
2026-10-22T17:00:00.000Z	79 \| moderate	23.838 \| fine	104.741 \| fine	15.39 \| good	3.108 \| good	26.68 \| good	0.283 \| good
2026-10-22T18:00:00.000Z	75 \| moderate	21.686 \| fine	95.066 \| fine	21.499 \| good	2.413 \| good	25.655 \| good	0.241 \| good
2026-10-22T19:00:00.000Z	69 \| moderate	18.833 \| fine	83.172 \| fine	25.801 \| good	3.847 \| good	21.57 \| good	0.208 \| good
2026-10-22T20:00:00.000Z	64 \| moderate	16.134 \| fine	72.276 \| fine	29.34 \| good	2.466 \| good	12.864 \| good	0.208 \| good
2026-10-22T20:00:00.000Z	64 \| moderate	16.134 \| fine	72.276 \| fine	29.34 \| good	2.466 \| good	12.864 \| good	0.208 \| good
2026-10-22T21:00:00.000Z	60 \| moderate	14.308 \| fine	63.637 \| fine	48.753 \| good	2.351 \| good	11.572 \| good	0.214 \| good
2026-10-22T22:00:00.000Z	66 \| moderate	17.483 \| fine	77.267 \| fine	43.986 \| good	2.319 \| good	18.841 \| good	0.251 \| good
2026-10-22T23:00:00.000Z	79 \| moderate	24.126 \| fine	104.979 \| fine	31.948 \| good	2.48 \| good	36.836 \| good	0.341 \| good
2026-10-23T00:00:00.000Z	77 \| moderate	23.387 \| fine	102.45 \| fine	23.776 \| good	2.495 \| good	46.136 \| good	0.419 \| good
2026-10-23T01:00:00.000Z	75 \| moderate	21.825 \| fine	96 \| fine	19.015 \| good	2.459 \| good	47.24 \| good	0.429 \| good
2026-10-23T02:00:00.000Z	71 \| moderate	20.436 \| fine	90.084 \| fine	12.633 \| good	2.476 \| good	46.766 \| good	0.424 \| good
2026-10-23T03:00:00.000Z	75 \| moderate	22.486 \| fine	98.172 \| fine	8.66 \| good	2.55 \| good	45.059 \| good	0.42 \| good
2026-10-23T04:00:00.000Z	73 \| moderate	20.853 \| fine	92.356 \| fine	6.755 \| good	2.645 \| good	42.986 \| good	0.42 \| good
2026-10-23T05:00:00.000Z	69 \| moderate	18.879 \| fine	83.489 \| fine	8.051 \| good	2.684 \| good	40.614 \| good	0.414 \| good
2026-10-23T06:00:00.000Z	66 \| moderate	16.982 \| fine	75.91 \| fine	9.302 \| good	2.753 \| good	37.826 \| good	0.399 \| good
2026-10-23T07:00:00.000Z	66 \| moderate	16.559 \| fine	73.809 \| fine	8.718 \| good	2.844 \| good	34.889 \| good	0.382 \| good
2026-10-23T08:00:00.000Z	66 \| moderate	17.402 \| fine	77.36 \| fine	6.11 \| good	2.901 \| good	31.662 \| good	0.368 \| good
2026-10-23T09:00:00.000Z	67 \| moderate	17.905 \| fine	79.361 \| fine	5.314 \| good	2.889 \| good	28.299 \| good	0.354 \| good
2026-10-23T10:00:00.000Z	69 \| moderate	18.91 \| fine	83.348 \| fine	7.37 \| good	2.832 \| good	25.59 \| good	0.342 \| good
2026-10-23T11:00:00.000Z	71 \| moderate	19.98 \| fine	87.468 \| fine	7.428 \| good	2.751 \| good	24.666 \| good	0.334 \| good
2026-10-23T12:00:00.000Z	71 \| moderate	20.201 \| fine	89.074 \| fine	5.125 \| good	2.749 \| good	27.41 \| good	0.342 \| good
2026-10-23T13:00:00.000Z	71 \| moderate	19.744 \| fine	87.18 \| fine	7.853 \| good	2.719 \| good	25.397 \| good	0.372 \| good
2026-10-23T14:00:00.000Z	69 \| moderate	18.915 \| fine	83.48 \| fine	15.517 \| good	2.356 \| good	20.733 \| good	0.367 \| good
2026-10-23T15:00:00.000Z	66 \| moderate	17.402 \| fine	77.146 \| fine	26.162 \| good	2.379 \| good	18.438 \| good	0.347 \| good
2026-10-23T16:00:00.000Z	62 \| moderate	15.176 \| fine	67.142 \| fine	36.988 \| good	2.499 \| good	14.773 \| good	0.284 \| good
2026-10-23T17:00:00.000Z	58 \| moderate	13.38 \| fine	60.882 \| fine	45.494 \| good	2.671 \| good	10.236 \| good	0.231 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	11.616 \| good	51.278 \| good	51.842 \| good	2.224 \| good	5.728 \| good	0.198 \| good
2026-10-23T19:00:00.000Z	52 \| moderate	10.453 \| good	46.125 \| good	54.465 \| good	2.06 \| good	4.146 \| good	0.189 \| good
2026-10-23T20:00:00.000Z	54 \| moderate	10.174 \| good	45.051 \| good	55.552 \| fine	2.027 \| good	3.886 \| good	0.187 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	9.789 \| good	43.866 \| good	54.138 \| good	2.064 \| good	4.341 \| good	0.188 \| good
2026-10-23T22:00:00.000Z	54 \| moderate	10.852 \| good	47.958 \| good	45.055 \| good	2.061 \| good	8.794 \| good	0.212 \| good
2026-10-23T23:00:00.000Z	60 \| moderate	13.509 \| fine	60.788 \| fine	34.502 \| good	2.096 \| good	19.788 \| good	0.268 \| good
2026-10-24T00:00:00.000Z	62 \| moderate	15.053 \| fine	67.036 \| fine	25.161 \| good	2.132 \| good	26.361 \| good	0.293 \| good
2026-10-24T01:00:00.000Z	60 \| moderate	14.153 \| fine	63.232 \| fine	18.855 \| good	2.202 \| good	26.797 \| good	0.281 \| good
2026-10-24T02:00:00.000Z	58 \| moderate	13.339 \| fine	60.895 \| fine	27.165 \| good	2.223 \| good	25.41 \| good	0.269 \| good
2026-10-24T03:00:00.000Z	60 \| moderate	14.088 \| fine	63.154 \| fine	29.221 \| good	2.177 \| good	22.862 \| good	0.258 \| good
2026-10-24T04:00:00.000Z	58 \| moderate	12.801 \| fine	57.336 \| fine	27.485 \| good	2.053 \| good	19.115 \| good	0.247 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.196 \| fine	59.27 \| fine	23.391 \| good	1.872 \| good	14.317 \| good	0.238 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	14.414 \| fine	65.033 \| fine	17.819 \| good	1.725 \| good	10.982 \| good	0.231 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	15.29 \| fine	68.841 \| fine	17.904 \| good	1.633 \| good	9.202 \| good	0.227 \| good
2026-10-24T08:00:00.000Z	64 \| moderate	16.085 \| fine	71.205 \| fine	14.156 \| good	1.596 \| good	8.437 \| good	0.226 \| good
2026-10-24T09:00:00.000Z	66 \| moderate	17.115 \| fine	75.258 \| fine	13.001 \| good	1.59 \| good	8.282 \| good	0.227 \| good
2026-10-24T10:00:00.000Z	66 \| moderate	17.04 \| fine	75.258 \| fine	15.443 \| good	1.608 \| good	8.652 \| good	0.229 \| good
2026-10-24T11:00:00.000Z	69 \| moderate	18.579 \| fine	81.43 \| fine	15.891 \| good	1.636 \| good	9.713 \| good	0.233 \| good
2026-10-24T12:00:00.000Z	71 \| moderate	19.712 \| fine	87.079 \| fine	17 \| good	1.653 \| good	13.239 \| good	0.244 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	20.269 \| fine	89.089 \| fine	18.191 \| good	1.683 \| good	14.896 \| good	0.26 \| good
2026-10-24T14:00:00.000Z	71 \| moderate	19.696 \| fine	86.949 \| fine	23.727 \| good	1.761 \| good	13.108 \| good	0.271 \| good
2026-10-24T15:00:00.000Z	67 \| moderate	17.579 \| fine	77.318 \| fine	30.987 \| good	1.9 \| good	11.309 \| good	0.264 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	14.912 \| fine	66.935 \| fine	38.366 \| good	2.043 \| good	10.249 \| good	0.254 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	12.902 \| fine	57.42 \| fine	47.043 \| good	2.215 \| good	9.171 \| good	0.242 \| good
2026-10-24T18:00:00.000Z	56 \| moderate	11.529 \| good	51.049 \| good	50.051 \| good	2.218 \| good	7.319 \| good	0.227 \| good
2026-10-24T19:00:00.000Z	52 \| moderate	10.048 \| good	44.871 \| good	52.745 \| good	2.029 \| good	5.638 \| good	0.211 \| good
2026-10-24T20:00:00.000Z	52 \| moderate	9.709 \| good	43.108 \| good	53.581 \| good	1.893 \| good	4.824 \| good	0.201 \| good

Markham

Get reliable air quality data to drive your business

Markham, Illinois air quality map: Stay updated on AQI near you

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How accurate is Illinois, USA air quality data?

Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Markham, Illinois?

The air quality information for Markham, Illinois is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Markham, Illinois at its worst?

In the past 24 hours, the air quality in Markham, Illinois was at its worst at 05:00:00 on 2026-10-22.

When did Markham, Illinois experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Markham, Illinois was observed at 10:00:00 on 2026-10-21.

What is the AQI in Markham, Illinois right now?

As of now, the AQI in Markham, Illinois is 64, indicating Moderate conditions.

What is the most common type of pollution in Markham, Illinois?

Markham, Illinois air has the highest levels of PM2.5.

What should I do in case of poor air quality in Markham, Illinois?

Poor air quality in Markham, Illinois means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Markham, Illinois at the moment?

PM_2.5 levels in Markham, Illinois are currently 16.134 μg/m³.

What is the PM₁₀ level in Markham, Illinois at the moment?

The PM₁₀ concentration in Markham, Illinois is 72.276 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Markham, Illinois at the moment?

The current carbon monoxide (CO) concentration in Markham, Illinois is 0.208 ppm.

What is the sulfur dioxide (SO₂) level in Markham, Illinois at the moment?

Currently, Markham, Illinois has a sulfur dioxide (SO₂) concentration of 2.466 ppb.

What is the ozone (O₃) level in Markham, Illinois at the moment?

The current ozone (O₃) level in Markham, Illinois at the moment is 29.34 ppm.

What is the nitrogen dioxide (NO₂) level in Markham, Illinois at the moment?

Nitrogen dioxide (NO₂) level in Markham, Illinois at the moment is 12.864 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T21:00:00.000Z	60 \| moderate	13.513 \| fine	60.332 \| fine	33.639 \| good	5.534 \| good	9.408 \| good	0.208 \| good
2026-10-20T22:00:00.000Z	60 \| moderate	13.843 \| fine	61.909 \| fine	36.282 \| good	9.1 \| good	8.524 \| good	0.208 \| good
2026-10-20T23:00:00.000Z	58 \| moderate	13.23 \| fine	59.48 \| fine	38.255 \| good	4.707 \| good	25.219 \| good	0.224 \| good
2026-10-21T00:00:00.000Z	56 \| moderate	11.576 \| good	51.613 \| good	35.16 \| good	1.162 \| good	24.766 \| good	0.267 \| good
2026-10-21T01:00:00.000Z	56 \| moderate	11.777 \| good	52.567 \| good	35.118 \| good	0.849 \| good	30.204 \| good	0.284 \| good
2026-10-21T02:00:00.000Z	58 \| moderate	12.776 \| fine	57.17 \| fine	27.978 \| good	0.704 \| good	28.704 \| good	0.3 \| good
2026-10-21T03:00:00.000Z	60 \| moderate	13.741 \| fine	61.572 \| fine	9.162 \| good	2.755 \| good	33.101 \| good	0.301 \| good
2026-10-21T04:00:00.000Z	66 \| moderate	17.181 \| fine	75.646 \| fine	21.119 \| good	0.658 \| good	24.683 \| good	0.299 \| good
2026-10-21T05:00:00.000Z	69 \| moderate	18.698 \| fine	82.43 \| fine	15.904 \| good	1.503 \| good	22.865 \| good	0.283 \| good
2026-10-21T06:00:00.000Z	69 \| moderate	18.672 \| fine	82.43 \| fine	10.683 \| good	1.977 \| good	22.762 \| good	0.27 \| good
2026-10-21T07:00:00.000Z	69 \| moderate	19.478 \| fine	86.629 \| fine	5.128 \| good	1.729 \| good	22.67 \| good	0.286 \| good
2026-10-21T08:00:00.000Z	71 \| moderate	20.065 \| fine	82.277 \| fine	6.107 \| good	1.008 \| good	21.116 \| good	0.257 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	20.611 \| fine	84.776 \| fine	6.175 \| good	0.998 \| good	22.482 \| good	0.241 \| good
2026-10-21T10:00:00.000Z	73 \| moderate	21.192 \| fine	87.725 \| fine	8.606 \| good	1.04 \| good	23.138 \| good	0.286 \| good
2026-10-21T11:00:00.000Z	73 \| moderate	21.148 \| fine	87.551 \| fine	3.64 \| good	1.105 \| good	23.844 \| good	0.345 \| good
2026-10-21T12:00:00.000Z	75 \| moderate	22.205 \| fine	97.827 \| fine	5.449 \| good	1.082 \| good	23.633 \| good	0.358 \| good
2026-10-21T13:00:00.000Z	75 \| moderate	22.222 \| fine	98.001 \| fine	2.896 \| good	1.119 \| good	20.17 \| good	0.358 \| good
2026-10-21T14:00:00.000Z	79 \| moderate	24.258 \| fine	106.027 \| fine	4.453 \| good	1.211 \| good	22.588 \| good	0.466 \| good
2026-10-21T15:00:00.000Z	79 \| moderate	24.214 \| fine	105.854 \| fine	8.128 \| good	1.81 \| good	23.985 \| good	0.394 \| good
2026-10-21T16:00:00.000Z	73 \| moderate	20.984 \| fine	92.143 \| fine	10.426 \| good	2.096 \| good	21.549 \| good	0.299 \| good
2026-10-21T17:00:00.000Z	67 \| moderate	17.924 \| fine	79.764 \| fine	18.689 \| good	1.978 \| good	20.143 \| good	0.25 \| good
2026-10-21T18:00:00.000Z	62 \| moderate	15.008 \| fine	67.539 \| fine	26.212 \| good	2.139 \| good	14.818 \| good	0.237 \| good
2026-10-21T19:00:00.000Z	62 \| moderate	14.835 \| fine	66.846 \| fine	34.757 \| good	1.316 \| good	11.034 \| good	0.237 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	11.202 \| good	50.141 \| good	40.072 \| good	1.348 \| good	6.288 \| good	0.237 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.525 \| good	42.361 \| good	43.985 \| good	1.429 \| good	6.919 \| good	0.237 \| good
2026-10-21T22:00:00.000Z	44 \| good	8.455 \| good	38.104 \| good	47.859 \| good	1.774 \| good	11.522 \| good	0.237 \| good
2026-10-21T23:00:00.000Z	45 \| good	8.466 \| good	37.914 \| good	48.667 \| good	2.339 \| good	24.387 \| good	0.254 \| good
2026-10-22T00:00:00.000Z	54 \| moderate	10.865 \| good	48.595 \| good	43.552 \| good	1.687 \| good	18.126 \| good	0.313 \| good
2026-10-22T01:00:00.000Z	60 \| moderate	14.065 \| fine	62.801 \| fine	28.803 \| good	1.229 \| good	20.164 \| good	0.356 \| good
2026-10-22T02:00:00.000Z	66 \| moderate	17.066 \| fine	75.488 \| fine	21.009 \| good	0.975 \| good	25.503 \| good	0.372 \| good
2026-10-22T03:00:00.000Z	52 \| moderate	10.185 \| good	45.509 \| good	7.705 \| good	3.551 \| good	43.932 \| good	0.584 \| good
2026-10-22T04:00:00.000Z	71 \| moderate	20.271 \| fine	89.124 \| fine	9.562 \| good	1.81 \| good	34.201 \| good	0.417 \| good
2026-10-22T05:00:00.000Z	77 \| moderate	22.501 \| fine	98.884 \| fine	8.435 \| good	1.495 \| good	31.733 \| good	0.385 \| good
2026-10-22T06:00:00.000Z	75 \| moderate	22.27 \| fine	97.089 \| fine	1.869 \| good	1.44 \| good	27.416 \| good	0.411 \| good
2026-10-22T07:00:00.000Z	75 \| moderate	22.486 \| fine	97.956 \| fine	2.987 \| good	1.476 \| good	27.066 \| good	0.411 \| good
2026-10-22T08:00:00.000Z	75 \| moderate	21.679 \| fine	89.954 \| fine	2.518 \| good	1.399 \| good	26.343 \| good	0.34 \| good
2026-10-22T09:00:00.000Z	75 \| moderate	21.644 \| fine	89.78 \| fine	1.091 \| good	1.569 \| good	23.793 \| good	0.323 \| good
2026-10-22T10:00:00.000Z	73 \| moderate	21.064 \| fine	88.143 \| fine	5.178 \| good	1.387 \| good	20.963 \| good	0.31 \| good
2026-10-22T11:00:00.000Z	73 \| moderate	21.037 \| fine	88.337 \| fine	3.973 \| good	1.376 \| good	21.652 \| good	0.416 \| good
2026-10-22T12:00:00.000Z	73 \| moderate	20.995 \| fine	92.627 \| fine	2.781 \| good	1.45 \| good	22.607 \| good	0.475 \| good
2026-10-22T13:00:00.000Z	73 \| moderate	21.304 \| fine	94.357 \| fine	4.131 \| good	1.713 \| good	20.646 \| good	0.434 \| good
2026-10-22T14:00:00.000Z	75 \| moderate	22.226 \| fine	97.87 \| fine	4.983 \| good	1.737 \| good	18.751 \| good	0.476 \| good
2026-10-22T15:00:00.000Z	79 \| moderate	23.774 \| fine	104.244 \| fine	7.663 \| good	2.218 \| good	21.819 \| good	0.49 \| good
2026-10-22T16:00:00.000Z	79 \| moderate	23.83 \| fine	104.741 \| fine	11.848 \| good	2.62 \| good	29.106 \| good	0.333 \| good
2026-10-22T17:00:00.000Z	79 \| moderate	23.838 \| fine	104.741 \| fine	15.39 \| good	3.108 \| good	26.68 \| good	0.283 \| good
2026-10-22T18:00:00.000Z	75 \| moderate	21.686 \| fine	95.066 \| fine	21.499 \| good	2.413 \| good	25.655 \| good	0.241 \| good
2026-10-22T19:00:00.000Z	69 \| moderate	18.833 \| fine	83.172 \| fine	25.801 \| good	3.847 \| good	21.57 \| good	0.208 \| good
2026-10-22T20:00:00.000Z	64 \| moderate	16.134 \| fine	72.276 \| fine	29.34 \| good	2.466 \| good	12.864 \| good	0.208 \| good
2026-10-22T20:00:00.000Z	64 \| moderate	16.134 \| fine	72.276 \| fine	29.34 \| good	2.466 \| good	12.864 \| good	0.208 \| good
2026-10-22T21:00:00.000Z	60 \| moderate	14.308 \| fine	63.637 \| fine	48.753 \| good	2.351 \| good	11.572 \| good	0.214 \| good
2026-10-22T22:00:00.000Z	66 \| moderate	17.483 \| fine	77.267 \| fine	43.986 \| good	2.319 \| good	18.841 \| good	0.251 \| good
2026-10-22T23:00:00.000Z	79 \| moderate	24.126 \| fine	104.979 \| fine	31.948 \| good	2.48 \| good	36.836 \| good	0.341 \| good
2026-10-23T00:00:00.000Z	77 \| moderate	23.387 \| fine	102.45 \| fine	23.776 \| good	2.495 \| good	46.136 \| good	0.419 \| good
2026-10-23T01:00:00.000Z	75 \| moderate	21.825 \| fine	96 \| fine	19.015 \| good	2.459 \| good	47.24 \| good	0.429 \| good
2026-10-23T02:00:00.000Z	71 \| moderate	20.436 \| fine	90.084 \| fine	12.633 \| good	2.476 \| good	46.766 \| good	0.424 \| good
2026-10-23T03:00:00.000Z	75 \| moderate	22.486 \| fine	98.172 \| fine	8.66 \| good	2.55 \| good	45.059 \| good	0.42 \| good
2026-10-23T04:00:00.000Z	73 \| moderate	20.853 \| fine	92.356 \| fine	6.755 \| good	2.645 \| good	42.986 \| good	0.42 \| good
2026-10-23T05:00:00.000Z	69 \| moderate	18.879 \| fine	83.489 \| fine	8.051 \| good	2.684 \| good	40.614 \| good	0.414 \| good
2026-10-23T06:00:00.000Z	66 \| moderate	16.982 \| fine	75.91 \| fine	9.302 \| good	2.753 \| good	37.826 \| good	0.399 \| good
2026-10-23T07:00:00.000Z	66 \| moderate	16.559 \| fine	73.809 \| fine	8.718 \| good	2.844 \| good	34.889 \| good	0.382 \| good
2026-10-23T08:00:00.000Z	66 \| moderate	17.402 \| fine	77.36 \| fine	6.11 \| good	2.901 \| good	31.662 \| good	0.368 \| good
2026-10-23T09:00:00.000Z	67 \| moderate	17.905 \| fine	79.361 \| fine	5.314 \| good	2.889 \| good	28.299 \| good	0.354 \| good
2026-10-23T10:00:00.000Z	69 \| moderate	18.91 \| fine	83.348 \| fine	7.37 \| good	2.832 \| good	25.59 \| good	0.342 \| good
2026-10-23T11:00:00.000Z	71 \| moderate	19.98 \| fine	87.468 \| fine	7.428 \| good	2.751 \| good	24.666 \| good	0.334 \| good
2026-10-23T12:00:00.000Z	71 \| moderate	20.201 \| fine	89.074 \| fine	5.125 \| good	2.749 \| good	27.41 \| good	0.342 \| good
2026-10-23T13:00:00.000Z	71 \| moderate	19.744 \| fine	87.18 \| fine	7.853 \| good	2.719 \| good	25.397 \| good	0.372 \| good
2026-10-23T14:00:00.000Z	69 \| moderate	18.915 \| fine	83.48 \| fine	15.517 \| good	2.356 \| good	20.733 \| good	0.367 \| good
2026-10-23T15:00:00.000Z	66 \| moderate	17.402 \| fine	77.146 \| fine	26.162 \| good	2.379 \| good	18.438 \| good	0.347 \| good
2026-10-23T16:00:00.000Z	62 \| moderate	15.176 \| fine	67.142 \| fine	36.988 \| good	2.499 \| good	14.773 \| good	0.284 \| good
2026-10-23T17:00:00.000Z	58 \| moderate	13.38 \| fine	60.882 \| fine	45.494 \| good	2.671 \| good	10.236 \| good	0.231 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	11.616 \| good	51.278 \| good	51.842 \| good	2.224 \| good	5.728 \| good	0.198 \| good
2026-10-23T19:00:00.000Z	52 \| moderate	10.453 \| good	46.125 \| good	54.465 \| good	2.06 \| good	4.146 \| good	0.189 \| good
2026-10-23T20:00:00.000Z	54 \| moderate	10.174 \| good	45.051 \| good	55.552 \| fine	2.027 \| good	3.886 \| good	0.187 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	9.789 \| good	43.866 \| good	54.138 \| good	2.064 \| good	4.341 \| good	0.188 \| good
2026-10-23T22:00:00.000Z	54 \| moderate	10.852 \| good	47.958 \| good	45.055 \| good	2.061 \| good	8.794 \| good	0.212 \| good
2026-10-23T23:00:00.000Z	60 \| moderate	13.509 \| fine	60.788 \| fine	34.502 \| good	2.096 \| good	19.788 \| good	0.268 \| good
2026-10-24T00:00:00.000Z	62 \| moderate	15.053 \| fine	67.036 \| fine	25.161 \| good	2.132 \| good	26.361 \| good	0.293 \| good
2026-10-24T01:00:00.000Z	60 \| moderate	14.153 \| fine	63.232 \| fine	18.855 \| good	2.202 \| good	26.797 \| good	0.281 \| good
2026-10-24T02:00:00.000Z	58 \| moderate	13.339 \| fine	60.895 \| fine	27.165 \| good	2.223 \| good	25.41 \| good	0.269 \| good
2026-10-24T03:00:00.000Z	60 \| moderate	14.088 \| fine	63.154 \| fine	29.221 \| good	2.177 \| good	22.862 \| good	0.258 \| good
2026-10-24T04:00:00.000Z	58 \| moderate	12.801 \| fine	57.336 \| fine	27.485 \| good	2.053 \| good	19.115 \| good	0.247 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.196 \| fine	59.27 \| fine	23.391 \| good	1.872 \| good	14.317 \| good	0.238 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	14.414 \| fine	65.033 \| fine	17.819 \| good	1.725 \| good	10.982 \| good	0.231 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	15.29 \| fine	68.841 \| fine	17.904 \| good	1.633 \| good	9.202 \| good	0.227 \| good
2026-10-24T08:00:00.000Z	64 \| moderate	16.085 \| fine	71.205 \| fine	14.156 \| good	1.596 \| good	8.437 \| good	0.226 \| good
2026-10-24T09:00:00.000Z	66 \| moderate	17.115 \| fine	75.258 \| fine	13.001 \| good	1.59 \| good	8.282 \| good	0.227 \| good
2026-10-24T10:00:00.000Z	66 \| moderate	17.04 \| fine	75.258 \| fine	15.443 \| good	1.608 \| good	8.652 \| good	0.229 \| good
2026-10-24T11:00:00.000Z	69 \| moderate	18.579 \| fine	81.43 \| fine	15.891 \| good	1.636 \| good	9.713 \| good	0.233 \| good
2026-10-24T12:00:00.000Z	71 \| moderate	19.712 \| fine	87.079 \| fine	17 \| good	1.653 \| good	13.239 \| good	0.244 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	20.269 \| fine	89.089 \| fine	18.191 \| good	1.683 \| good	14.896 \| good	0.26 \| good
2026-10-24T14:00:00.000Z	71 \| moderate	19.696 \| fine	86.949 \| fine	23.727 \| good	1.761 \| good	13.108 \| good	0.271 \| good
2026-10-24T15:00:00.000Z	67 \| moderate	17.579 \| fine	77.318 \| fine	30.987 \| good	1.9 \| good	11.309 \| good	0.264 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	14.912 \| fine	66.935 \| fine	38.366 \| good	2.043 \| good	10.249 \| good	0.254 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	12.902 \| fine	57.42 \| fine	47.043 \| good	2.215 \| good	9.171 \| good	0.242 \| good
2026-10-24T18:00:00.000Z	56 \| moderate	11.529 \| good	51.049 \| good	50.051 \| good	2.218 \| good	7.319 \| good	0.227 \| good
2026-10-24T19:00:00.000Z	52 \| moderate	10.048 \| good	44.871 \| good	52.745 \| good	2.029 \| good	5.638 \| good	0.211 \| good
2026-10-24T20:00:00.000Z	52 \| moderate	9.709 \| good	43.108 \| good	53.581 \| good	1.893 \| good	4.824 \| good	0.201 \| good

Live air quality index in Markham, Illinois today

Major air pollutants in Markham, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Markham, Illinois air quality map: Stay updated on AQI near you

Air quality in nearby cities

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Markham, Illinois at the moment?

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What is the nitrogen dioxide (NO₂) level in Markham, Illinois at the moment?