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

The PM10 concentration in Markham, Illinois is 17.497 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 0.719 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 15.449 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 4.512 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 3.924 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)

Good

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)

3.92 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

17.50 μg/m³

155

255

425

605+

Ozone (O₃)

15.45 ppb

201

201+

Sulfur Dioxide (SO₂)

0.72 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.51 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2025-10-22T21:00:00.000Z	15 \| good	2.37 \| good	9.78 \| good	15.993 \| good	0.393 \| good	3.277 \| good	0.271 \| good
2025-10-22T22:00:00.000Z	15 \| good	2.443 \| good	10.272 \| good	15.909 \| good	0.478 \| good	3.95 \| good	0.256 \| good
2025-10-22T23:00:00.000Z	16 \| good	2.431 \| good	10.155 \| good	16.677 \| good	0.66 \| good	4.985 \| good	0.256 \| good
2025-10-23T00:00:00.000Z	16 \| good	2.156 \| good	9.025 \| good	16.838 \| good	0.399 \| good	5.991 \| good	0.272 \| good
2025-10-23T01:00:00.000Z	15 \| good	2.031 \| good	8.401 \| good	16.064 \| good	0.437 \| good	7.96 \| good	0.259 \| good
2025-10-23T02:00:00.000Z	16 \| good	2.019 \| good	8.401 \| good	16.784 \| good	0.463 \| good	10.823 \| good	0.259 \| good
2025-10-23T03:00:00.000Z	16 \| good	1.616 \| good	6.896 \| good	16.827 \| good	0.599 \| good	9.394 \| good	0.259 \| good
2025-10-23T04:00:00.000Z	17 \| good	1.616 \| good	6.896 \| good	17.601 \| good	0.598 \| good	9.608 \| good	0.259 \| good
2025-10-23T05:00:00.000Z	16 \| good	1.528 \| good	6.138 \| good	17.249 \| good	1.085 \| good	10.64 \| good	0.31 \| good
2025-10-23T06:00:00.000Z	13 \| good	1.503 \| good	6.013 \| good	13.782 \| good	0.72 \| good	10.885 \| good	0.274 \| good
2025-10-23T07:00:00.000Z	13 \| good	1.53 \| good	6.401 \| good	14.147 \| good	0.623 \| good	12.697 \| good	0.256 \| good
2025-10-23T08:00:00.000Z	12 \| good	1.744 \| good	6.657 \| good	12.712 \| good	0.919 \| good	12.232 \| good	0.239 \| good
2025-10-23T09:00:00.000Z	11 \| good	1.999 \| good	7.923 \| good	10.146 \| good	0.696 \| good	10.093 \| good	0.203 \| good
2025-10-23T10:00:00.000Z	11 \| good	2.411 \| good	9.548 \| good	7.39 \| good	0.564 \| good	10.582 \| good	0.221 \| good
2025-10-23T11:00:00.000Z	16 \| good	2.753 \| good	11.706 \| good	5.712 \| good	0.581 \| good	10.583 \| good	0.271 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.812 \| good	11.941 \| good	3.896 \| good	0.637 \| good	9.982 \| good	0.306 \| good
2025-10-23T13:00:00.000Z	16 \| good	3.085 \| good	13.305 \| good	3.179 \| good	0.722 \| good	11.306 \| good	0.324 \| good
2025-10-23T14:00:00.000Z	22 \| good	3.906 \| good	17.198 \| good	3.306 \| good	0.761 \| good	12.133 \| good	0.391 \| good
2025-10-23T15:00:00.000Z	22 \| good	3.912 \| good	17.177 \| good	6.16 \| good	0.765 \| good	10.007 \| good	0.305 \| good
2025-10-23T16:00:00.000Z	22 \| good	3.693 \| good	16.146 \| good	8.347 \| good	1.41 \| good	8.727 \| good	0.256 \| good
2025-10-23T17:00:00.000Z	22 \| good	3.693 \| good	16.146 \| good	11.473 \| good	1.19 \| good	6.021 \| good	0.24 \| good
2025-10-23T18:00:00.000Z	16 \| good	3.163 \| good	13.612 \| good	14.348 \| good	0.878 \| good	4.815 \| good	0.227 \| good
2025-10-23T19:00:00.000Z	16 \| good	3.152 \| good	13.495 \| good	16.405 \| good	0.987 \| good	4.755 \| good	0.256 \| good
2025-10-23T20:00:00.000Z	18 \| good	2.912 \| good	12.36 \| good	18.531 \| good	0.893 \| good	4.806 \| good	0.285 \| good
2025-10-23T21:00:00.000Z	19 \| good	2.538 \| good	10.743 \| good	20.758 \| good	0.863 \| good	3.659 \| good	0.285 \| good
2025-10-23T22:00:00.000Z	20 \| good	2.273 \| good	9.363 \| good	22.254 \| good	0.85 \| good	3.551 \| good	0.285 \| good
2025-10-23T23:00:00.000Z	22 \| good	2.226 \| good	9.128 \| good	23.506 \| good	0.735 \| good	3.002 \| good	0.285 \| good
2025-10-24T00:00:00.000Z	21 \| good	2.242 \| good	9.394 \| good	23.349 \| good	0.864 \| good	7.295 \| good	0.272 \| good
2025-10-24T01:00:00.000Z	20 \| good	2.76 \| good	11.433 \| good	22.059 \| good	1.475 \| good	11.097 \| good	0.288 \| good
2025-10-24T02:00:00.000Z	16 \| good	3.056 \| good	13.287 \| good	16.759 \| good	1.1 \| good	15.466 \| good	0.334 \| good
2025-10-24T03:00:00.000Z	52 \| moderate	9.93 \| good	44.077 \| good	0.325 \| good	1.461 \| good	16.468 \| good	0.197 \| good
2025-10-24T04:00:00.000Z	22 \| good	4.108 \| good	17.907 \| good	8.606 \| good	1.315 \| good	20.975 \| good	0.324 \| good
2025-10-24T05:00:00.000Z	22 \| good	4.342 \| good	19.149 \| good	4.637 \| good	1.07 \| good	16.355 \| good	0.357 \| good
2025-10-24T06:00:00.000Z	27 \| good	4.541 \| good	19.896 \| good	1.892 \| good	1.17 \| good	16.355 \| good	0.373 \| good
2025-10-24T07:00:00.000Z	27 \| good	4.742 \| good	20.889 \| good	4.98 \| good	1.315 \| good	15.162 \| good	0.389 \| good
2025-10-24T08:00:00.000Z	27 \| good	4.834 \| good	20.291 \| good	4.933 \| good	1.295 \| good	13.87 \| good	0.357 \| good
2025-10-24T09:00:00.000Z	27 \| good	5.031 \| good	20.713 \| good	4.85 \| good	0.951 \| good	13.574 \| good	0.356 \| good
2025-10-24T10:00:00.000Z	27 \| good	5.067 \| good	20.948 \| good	4.384 \| good	1.194 \| good	16.1 \| good	0.37 \| good
2025-10-24T11:00:00.000Z	27 \| good	5.041 \| good	22.319 \| good	3.812 \| good	1.176 \| good	14.577 \| good	0.335 \| good
2025-10-24T12:00:00.000Z	27 \| good	5.041 \| good	22.321 \| good	3.167 \| good	1.113 \| good	13.826 \| good	0.376 \| good
2025-10-24T13:00:00.000Z	27 \| good	5.001 \| good	22.058 \| good	1.694 \| good	1.018 \| good	15.686 \| good	0.398 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.229 \| good	22.815 \| good	1.854 \| good	1.206 \| good	17.853 \| good	0.588 \| good
2025-10-24T15:00:00.000Z	33 \| good	6.049 \| good	26.432 \| good	3.137 \| good	1.484 \| good	17.603 \| good	0.357 \| good
2025-10-24T16:00:00.000Z	33 \| good	5.508 \| good	24.044 \| good	4.756 \| good	2.98 \| good	14.496 \| good	0.189 \| good
2025-10-24T17:00:00.000Z	27 \| good	4.629 \| good	20.227 \| good	8.734 \| good	1.092 \| good	6.976 \| good	0.191 \| good
2025-10-24T18:00:00.000Z	27 \| good	4.629 \| good	20.227 \| good	11.781 \| good	0.785 \| good	3.302 \| good	0.256 \| good
2025-10-24T19:00:00.000Z	22 \| good	3.996 \| good	17.712 \| good	15.119 \| good	0.816 \| good	4.576 \| good	0.271 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.962 \| good	17.621 \| good	16.015 \| good	0.712 \| good	4.597 \| good	0.272 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.924 \| good	17.497 \| good	15.449 \| good	0.719 \| good	4.512 \| good	0.272 \| good
2025-10-24T21:00:00.000Z	44 \| good	7.973 \| good	35.009 \| good	23.521 \| good	2.079 \| good	5.772 \| good	0.159 \| good
2025-10-24T22:00:00.000Z	52 \| moderate	9.511 \| good	42.14 \| good	17.176 \| good	2.17 \| good	11.772 \| good	0.202 \| good
2025-10-24T23:00:00.000Z	52 \| moderate	9.755 \| good	43.198 \| good	12.197 \| good	2.261 \| good	17.771 \| good	0.245 \| good
2025-10-25T00:00:00.000Z	56 \| moderate	11.747 \| good	52.17 \| good	8.839 \| good	2.352 \| good	23.77 \| good	0.289 \| good
2025-10-25T01:00:00.000Z	54 \| moderate	11.283 \| good	49.786 \| good	5.934 \| good	2.265 \| good	22.632 \| good	0.269 \| good
2025-10-25T02:00:00.000Z	56 \| moderate	11.629 \| good	52.175 \| good	5.426 \| good	2.179 \| good	21.494 \| good	0.248 \| good
2025-10-25T03:00:00.000Z	54 \| moderate	10.522 \| good	46.404 \| good	5.819 \| good	2.092 \| good	20.356 \| good	0.228 \| good
2025-10-25T04:00:00.000Z	52 \| moderate	9.557 \| good	42.214 \| good	6.414 \| good	1.882 \| good	18.675 \| good	0.217 \| good
2025-10-25T05:00:00.000Z	38 \| good	6.861 \| good	29.985 \| good	7.405 \| good	1.672 \| good	16.994 \| good	0.206 \| good
2025-10-25T06:00:00.000Z	33 \| good	6.069 \| good	26.524 \| good	6.399 \| good	1.462 \| good	15.313 \| good	0.195 \| good
2025-10-25T07:00:00.000Z	27 \| good	5.053 \| good	22.082 \| good	6.846 \| good	1.393 \| good	13.537 \| good	0.187 \| good
2025-10-25T08:00:00.000Z	22 \| good	4.376 \| good	18.938 \| good	6.08 \| good	1.324 \| good	11.76 \| good	0.179 \| good
2025-10-25T09:00:00.000Z	16 \| good	3.458 \| good	14.963 \| good	5.997 \| good	1.255 \| good	9.984 \| good	0.171 \| good
2025-10-25T10:00:00.000Z	22 \| good	3.752 \| good	16.31 \| good	5.304 \| good	1.386 \| good	10.974 \| good	0.18 \| good
2025-10-25T11:00:00.000Z	22 \| good	4.252 \| good	18.792 \| good	4.772 \| good	1.518 \| good	11.963 \| good	0.189 \| good
2025-10-25T12:00:00.000Z	27 \| good	4.682 \| good	20.664 \| good	4.479 \| good	1.649 \| good	12.953 \| good	0.198 \| good
2025-10-25T13:00:00.000Z	33 \| good	6.207 \| good	27.353 \| good	7.523 \| good	1.763 \| good	11.714 \| good	0.208 \| good
2025-10-25T14:00:00.000Z	44 \| good	7.529 \| good	33.036 \| good	13.85 \| good	1.877 \| good	10.475 \| good	0.218 \| good
2025-10-25T15:00:00.000Z	44 \| good	7.793 \| good	34.084 \| good	17.812 \| good	1.991 \| good	9.236 \| good	0.227 \| good
2025-10-25T16:00:00.000Z	49 \| good	8.638 \| good	37.847 \| good	19.756 \| good	2.338 \| good	7.698 \| good	0.211 \| good
2025-10-25T17:00:00.000Z	52 \| moderate	10.328 \| good	45.65 \| good	18.585 \| good	2.686 \| good	6.16 \| good	0.195 \| good
2025-10-25T18:00:00.000Z	58 \| moderate	12.536 \| fine	56.525 \| fine	14.483 \| good	3.033 \| good	4.622 \| good	0.178 \| good
2025-10-25T19:00:00.000Z	60 \| moderate	13.61 \| fine	61.174 \| fine	14.468 \| good	3.052 \| good	5.085 \| good	0.182 \| good
2025-10-25T20:00:00.000Z	58 \| moderate	13.293 \| fine	60.052 \| fine	15.22 \| good	3.071 \| good	5.548 \| good	0.185 \| good
2025-10-25T21:00:00.000Z	56 \| moderate	11.915 \| good	52.783 \| good	20.185 \| good	3.09 \| good	6.011 \| good	0.188 \| good
2025-10-25T22:00:00.000Z	54 \| moderate	10.861 \| good	48.175 \| good	18.075 \| good	2.959 \| good	11.686 \| good	0.225 \| good
2025-10-25T23:00:00.000Z	52 \| moderate	10.488 \| good	46.497 \| good	15.301 \| good	2.829 \| good	17.36 \| good	0.261 \| good
2025-10-26T00:00:00.000Z	54 \| moderate	11.229 \| good	49.663 \| good	13.417 \| good	2.698 \| good	23.034 \| good	0.298 \| good
2025-10-26T01:00:00.000Z	56 \| moderate	11.756 \| good	52.551 \| good	16.241 \| good	2.452 \| good	21.426 \| good	0.282 \| good
2025-10-26T02:00:00.000Z	56 \| moderate	11.79 \| good	52.441 \| good	19.336 \| good	2.206 \| good	19.818 \| good	0.266 \| good
2025-10-26T03:00:00.000Z	54 \| moderate	11.108 \| good	48.95 \| good	24.64 \| good	1.96 \| good	18.21 \| good	0.249 \| good
2025-10-26T04:00:00.000Z	54 \| moderate	10.502 \| good	46.378 \| good	29.244 \| good	1.809 \| good	16.204 \| good	0.242 \| good
2025-10-26T05:00:00.000Z	54 \| moderate	10.533 \| good	46.753 \| good	27.123 \| good	1.659 \| good	14.197 \| good	0.234 \| good
2025-10-26T06:00:00.000Z	60 \| moderate	14.407 \| fine	64.703 \| fine	23.458 \| good	1.509 \| good	12.191 \| good	0.226 \| good
2025-10-26T07:00:00.000Z	66 \| moderate	17.014 \| fine	75.956 \| fine	20.858 \| good	1.619 \| good	11.461 \| good	0.223 \| good
2025-10-26T08:00:00.000Z	64 \| moderate	15.823 \| fine	70.283 \| fine	16.141 \| good	1.729 \| good	10.73 \| good	0.22 \| good
2025-10-26T09:00:00.000Z	60 \| moderate	13.545 \| fine	61.103 \| fine	12.161 \| good	1.839 \| good	10 \| good	0.217 \| good
2025-10-26T10:00:00.000Z	60 \| moderate	14.146 \| fine	63.093 \| fine	11.02 \| good	2.191 \| good	11.102 \| good	0.224 \| good
2025-10-26T11:00:00.000Z	56 \| moderate	12.339 \| fine	55.393 \| fine	11.066 \| good	2.542 \| good	12.204 \| good	0.232 \| good
2025-10-26T12:00:00.000Z	56 \| moderate	11.626 \| good	51.395 \| good	11.242 \| good	2.894 \| good	13.306 \| good	0.239 \| good
2025-10-26T13:00:00.000Z	56 \| moderate	11.692 \| good	52.362 \| good	13.912 \| good	3.062 \| good	11.698 \| good	0.244 \| good
2025-10-26T14:00:00.000Z	56 \| moderate	11.819 \| good	52.642 \| good	18.906 \| good	3.23 \| good	10.09 \| good	0.249 \| good
2025-10-26T15:00:00.000Z	54 \| moderate	11.043 \| good	48.955 \| good	23.874 \| good	3.398 \| good	8.481 \| good	0.254 \| good
2025-10-26T16:00:00.000Z	52 \| moderate	9.987 \| good	44.47 \| good	27.499 \| good	3.439 \| good	7.04 \| good	0.229 \| good
2025-10-26T17:00:00.000Z	49 \| good	9.003 \| good	40.055 \| good	31.166 \| good	3.479 \| good	5.599 \| good	0.204 \| good
2025-10-26T18:00:00.000Z	44 \| good	7.985 \| good	35.068 \| good	36.145 \| good	3.52 \| good	4.157 \| good	0.179 \| good
2025-10-26T19:00:00.000Z	44 \| good	8.109 \| good	35.428 \| good	36.349 \| good	3.075 \| good	4.04 \| good	0.174 \| good
2025-10-26T20:00:00.000Z	44 \| good	8.369 \| good	36.771 \| good	35.988 \| good	2.63 \| good	3.922 \| good	0.169 \| good

Markham

Get reliable air quality data to drive your business

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

0.27ppm

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 03:00:00 on 2025-10-24.

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 02:00:00 on 2025-10-24.

What is the AQI in Markham, Illinois right now?

As of now, the AQI in Markham, Illinois is 22, indicating Good 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 3.924 μg/m³.

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

The PM₁₀ concentration in Markham, Illinois is 17.497 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 0.272 ppm.

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

Currently, Markham, Illinois has a sulfur dioxide (SO₂) concentration of 0.719 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 15.449 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 4.512 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-22T21:00:00.000Z	15 \| good	2.37 \| good	9.78 \| good	15.993 \| good	0.393 \| good	3.277 \| good	0.271 \| good
2025-10-22T22:00:00.000Z	15 \| good	2.443 \| good	10.272 \| good	15.909 \| good	0.478 \| good	3.95 \| good	0.256 \| good
2025-10-22T23:00:00.000Z	16 \| good	2.431 \| good	10.155 \| good	16.677 \| good	0.66 \| good	4.985 \| good	0.256 \| good
2025-10-23T00:00:00.000Z	16 \| good	2.156 \| good	9.025 \| good	16.838 \| good	0.399 \| good	5.991 \| good	0.272 \| good
2025-10-23T01:00:00.000Z	15 \| good	2.031 \| good	8.401 \| good	16.064 \| good	0.437 \| good	7.96 \| good	0.259 \| good
2025-10-23T02:00:00.000Z	16 \| good	2.019 \| good	8.401 \| good	16.784 \| good	0.463 \| good	10.823 \| good	0.259 \| good
2025-10-23T03:00:00.000Z	16 \| good	1.616 \| good	6.896 \| good	16.827 \| good	0.599 \| good	9.394 \| good	0.259 \| good
2025-10-23T04:00:00.000Z	17 \| good	1.616 \| good	6.896 \| good	17.601 \| good	0.598 \| good	9.608 \| good	0.259 \| good
2025-10-23T05:00:00.000Z	16 \| good	1.528 \| good	6.138 \| good	17.249 \| good	1.085 \| good	10.64 \| good	0.31 \| good
2025-10-23T06:00:00.000Z	13 \| good	1.503 \| good	6.013 \| good	13.782 \| good	0.72 \| good	10.885 \| good	0.274 \| good
2025-10-23T07:00:00.000Z	13 \| good	1.53 \| good	6.401 \| good	14.147 \| good	0.623 \| good	12.697 \| good	0.256 \| good
2025-10-23T08:00:00.000Z	12 \| good	1.744 \| good	6.657 \| good	12.712 \| good	0.919 \| good	12.232 \| good	0.239 \| good
2025-10-23T09:00:00.000Z	11 \| good	1.999 \| good	7.923 \| good	10.146 \| good	0.696 \| good	10.093 \| good	0.203 \| good
2025-10-23T10:00:00.000Z	11 \| good	2.411 \| good	9.548 \| good	7.39 \| good	0.564 \| good	10.582 \| good	0.221 \| good
2025-10-23T11:00:00.000Z	16 \| good	2.753 \| good	11.706 \| good	5.712 \| good	0.581 \| good	10.583 \| good	0.271 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.812 \| good	11.941 \| good	3.896 \| good	0.637 \| good	9.982 \| good	0.306 \| good
2025-10-23T13:00:00.000Z	16 \| good	3.085 \| good	13.305 \| good	3.179 \| good	0.722 \| good	11.306 \| good	0.324 \| good
2025-10-23T14:00:00.000Z	22 \| good	3.906 \| good	17.198 \| good	3.306 \| good	0.761 \| good	12.133 \| good	0.391 \| good
2025-10-23T15:00:00.000Z	22 \| good	3.912 \| good	17.177 \| good	6.16 \| good	0.765 \| good	10.007 \| good	0.305 \| good
2025-10-23T16:00:00.000Z	22 \| good	3.693 \| good	16.146 \| good	8.347 \| good	1.41 \| good	8.727 \| good	0.256 \| good
2025-10-23T17:00:00.000Z	22 \| good	3.693 \| good	16.146 \| good	11.473 \| good	1.19 \| good	6.021 \| good	0.24 \| good
2025-10-23T18:00:00.000Z	16 \| good	3.163 \| good	13.612 \| good	14.348 \| good	0.878 \| good	4.815 \| good	0.227 \| good
2025-10-23T19:00:00.000Z	16 \| good	3.152 \| good	13.495 \| good	16.405 \| good	0.987 \| good	4.755 \| good	0.256 \| good
2025-10-23T20:00:00.000Z	18 \| good	2.912 \| good	12.36 \| good	18.531 \| good	0.893 \| good	4.806 \| good	0.285 \| good
2025-10-23T21:00:00.000Z	19 \| good	2.538 \| good	10.743 \| good	20.758 \| good	0.863 \| good	3.659 \| good	0.285 \| good
2025-10-23T22:00:00.000Z	20 \| good	2.273 \| good	9.363 \| good	22.254 \| good	0.85 \| good	3.551 \| good	0.285 \| good
2025-10-23T23:00:00.000Z	22 \| good	2.226 \| good	9.128 \| good	23.506 \| good	0.735 \| good	3.002 \| good	0.285 \| good
2025-10-24T00:00:00.000Z	21 \| good	2.242 \| good	9.394 \| good	23.349 \| good	0.864 \| good	7.295 \| good	0.272 \| good
2025-10-24T01:00:00.000Z	20 \| good	2.76 \| good	11.433 \| good	22.059 \| good	1.475 \| good	11.097 \| good	0.288 \| good
2025-10-24T02:00:00.000Z	16 \| good	3.056 \| good	13.287 \| good	16.759 \| good	1.1 \| good	15.466 \| good	0.334 \| good
2025-10-24T03:00:00.000Z	52 \| moderate	9.93 \| good	44.077 \| good	0.325 \| good	1.461 \| good	16.468 \| good	0.197 \| good
2025-10-24T04:00:00.000Z	22 \| good	4.108 \| good	17.907 \| good	8.606 \| good	1.315 \| good	20.975 \| good	0.324 \| good
2025-10-24T05:00:00.000Z	22 \| good	4.342 \| good	19.149 \| good	4.637 \| good	1.07 \| good	16.355 \| good	0.357 \| good
2025-10-24T06:00:00.000Z	27 \| good	4.541 \| good	19.896 \| good	1.892 \| good	1.17 \| good	16.355 \| good	0.373 \| good
2025-10-24T07:00:00.000Z	27 \| good	4.742 \| good	20.889 \| good	4.98 \| good	1.315 \| good	15.162 \| good	0.389 \| good
2025-10-24T08:00:00.000Z	27 \| good	4.834 \| good	20.291 \| good	4.933 \| good	1.295 \| good	13.87 \| good	0.357 \| good
2025-10-24T09:00:00.000Z	27 \| good	5.031 \| good	20.713 \| good	4.85 \| good	0.951 \| good	13.574 \| good	0.356 \| good
2025-10-24T10:00:00.000Z	27 \| good	5.067 \| good	20.948 \| good	4.384 \| good	1.194 \| good	16.1 \| good	0.37 \| good
2025-10-24T11:00:00.000Z	27 \| good	5.041 \| good	22.319 \| good	3.812 \| good	1.176 \| good	14.577 \| good	0.335 \| good
2025-10-24T12:00:00.000Z	27 \| good	5.041 \| good	22.321 \| good	3.167 \| good	1.113 \| good	13.826 \| good	0.376 \| good
2025-10-24T13:00:00.000Z	27 \| good	5.001 \| good	22.058 \| good	1.694 \| good	1.018 \| good	15.686 \| good	0.398 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.229 \| good	22.815 \| good	1.854 \| good	1.206 \| good	17.853 \| good	0.588 \| good
2025-10-24T15:00:00.000Z	33 \| good	6.049 \| good	26.432 \| good	3.137 \| good	1.484 \| good	17.603 \| good	0.357 \| good
2025-10-24T16:00:00.000Z	33 \| good	5.508 \| good	24.044 \| good	4.756 \| good	2.98 \| good	14.496 \| good	0.189 \| good
2025-10-24T17:00:00.000Z	27 \| good	4.629 \| good	20.227 \| good	8.734 \| good	1.092 \| good	6.976 \| good	0.191 \| good
2025-10-24T18:00:00.000Z	27 \| good	4.629 \| good	20.227 \| good	11.781 \| good	0.785 \| good	3.302 \| good	0.256 \| good
2025-10-24T19:00:00.000Z	22 \| good	3.996 \| good	17.712 \| good	15.119 \| good	0.816 \| good	4.576 \| good	0.271 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.962 \| good	17.621 \| good	16.015 \| good	0.712 \| good	4.597 \| good	0.272 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.924 \| good	17.497 \| good	15.449 \| good	0.719 \| good	4.512 \| good	0.272 \| good
2025-10-24T21:00:00.000Z	44 \| good	7.973 \| good	35.009 \| good	23.521 \| good	2.079 \| good	5.772 \| good	0.159 \| good
2025-10-24T22:00:00.000Z	52 \| moderate	9.511 \| good	42.14 \| good	17.176 \| good	2.17 \| good	11.772 \| good	0.202 \| good
2025-10-24T23:00:00.000Z	52 \| moderate	9.755 \| good	43.198 \| good	12.197 \| good	2.261 \| good	17.771 \| good	0.245 \| good
2025-10-25T00:00:00.000Z	56 \| moderate	11.747 \| good	52.17 \| good	8.839 \| good	2.352 \| good	23.77 \| good	0.289 \| good
2025-10-25T01:00:00.000Z	54 \| moderate	11.283 \| good	49.786 \| good	5.934 \| good	2.265 \| good	22.632 \| good	0.269 \| good
2025-10-25T02:00:00.000Z	56 \| moderate	11.629 \| good	52.175 \| good	5.426 \| good	2.179 \| good	21.494 \| good	0.248 \| good
2025-10-25T03:00:00.000Z	54 \| moderate	10.522 \| good	46.404 \| good	5.819 \| good	2.092 \| good	20.356 \| good	0.228 \| good
2025-10-25T04:00:00.000Z	52 \| moderate	9.557 \| good	42.214 \| good	6.414 \| good	1.882 \| good	18.675 \| good	0.217 \| good
2025-10-25T05:00:00.000Z	38 \| good	6.861 \| good	29.985 \| good	7.405 \| good	1.672 \| good	16.994 \| good	0.206 \| good
2025-10-25T06:00:00.000Z	33 \| good	6.069 \| good	26.524 \| good	6.399 \| good	1.462 \| good	15.313 \| good	0.195 \| good
2025-10-25T07:00:00.000Z	27 \| good	5.053 \| good	22.082 \| good	6.846 \| good	1.393 \| good	13.537 \| good	0.187 \| good
2025-10-25T08:00:00.000Z	22 \| good	4.376 \| good	18.938 \| good	6.08 \| good	1.324 \| good	11.76 \| good	0.179 \| good
2025-10-25T09:00:00.000Z	16 \| good	3.458 \| good	14.963 \| good	5.997 \| good	1.255 \| good	9.984 \| good	0.171 \| good
2025-10-25T10:00:00.000Z	22 \| good	3.752 \| good	16.31 \| good	5.304 \| good	1.386 \| good	10.974 \| good	0.18 \| good
2025-10-25T11:00:00.000Z	22 \| good	4.252 \| good	18.792 \| good	4.772 \| good	1.518 \| good	11.963 \| good	0.189 \| good
2025-10-25T12:00:00.000Z	27 \| good	4.682 \| good	20.664 \| good	4.479 \| good	1.649 \| good	12.953 \| good	0.198 \| good
2025-10-25T13:00:00.000Z	33 \| good	6.207 \| good	27.353 \| good	7.523 \| good	1.763 \| good	11.714 \| good	0.208 \| good
2025-10-25T14:00:00.000Z	44 \| good	7.529 \| good	33.036 \| good	13.85 \| good	1.877 \| good	10.475 \| good	0.218 \| good
2025-10-25T15:00:00.000Z	44 \| good	7.793 \| good	34.084 \| good	17.812 \| good	1.991 \| good	9.236 \| good	0.227 \| good
2025-10-25T16:00:00.000Z	49 \| good	8.638 \| good	37.847 \| good	19.756 \| good	2.338 \| good	7.698 \| good	0.211 \| good
2025-10-25T17:00:00.000Z	52 \| moderate	10.328 \| good	45.65 \| good	18.585 \| good	2.686 \| good	6.16 \| good	0.195 \| good
2025-10-25T18:00:00.000Z	58 \| moderate	12.536 \| fine	56.525 \| fine	14.483 \| good	3.033 \| good	4.622 \| good	0.178 \| good
2025-10-25T19:00:00.000Z	60 \| moderate	13.61 \| fine	61.174 \| fine	14.468 \| good	3.052 \| good	5.085 \| good	0.182 \| good
2025-10-25T20:00:00.000Z	58 \| moderate	13.293 \| fine	60.052 \| fine	15.22 \| good	3.071 \| good	5.548 \| good	0.185 \| good
2025-10-25T21:00:00.000Z	56 \| moderate	11.915 \| good	52.783 \| good	20.185 \| good	3.09 \| good	6.011 \| good	0.188 \| good
2025-10-25T22:00:00.000Z	54 \| moderate	10.861 \| good	48.175 \| good	18.075 \| good	2.959 \| good	11.686 \| good	0.225 \| good
2025-10-25T23:00:00.000Z	52 \| moderate	10.488 \| good	46.497 \| good	15.301 \| good	2.829 \| good	17.36 \| good	0.261 \| good
2025-10-26T00:00:00.000Z	54 \| moderate	11.229 \| good	49.663 \| good	13.417 \| good	2.698 \| good	23.034 \| good	0.298 \| good
2025-10-26T01:00:00.000Z	56 \| moderate	11.756 \| good	52.551 \| good	16.241 \| good	2.452 \| good	21.426 \| good	0.282 \| good
2025-10-26T02:00:00.000Z	56 \| moderate	11.79 \| good	52.441 \| good	19.336 \| good	2.206 \| good	19.818 \| good	0.266 \| good
2025-10-26T03:00:00.000Z	54 \| moderate	11.108 \| good	48.95 \| good	24.64 \| good	1.96 \| good	18.21 \| good	0.249 \| good
2025-10-26T04:00:00.000Z	54 \| moderate	10.502 \| good	46.378 \| good	29.244 \| good	1.809 \| good	16.204 \| good	0.242 \| good
2025-10-26T05:00:00.000Z	54 \| moderate	10.533 \| good	46.753 \| good	27.123 \| good	1.659 \| good	14.197 \| good	0.234 \| good
2025-10-26T06:00:00.000Z	60 \| moderate	14.407 \| fine	64.703 \| fine	23.458 \| good	1.509 \| good	12.191 \| good	0.226 \| good
2025-10-26T07:00:00.000Z	66 \| moderate	17.014 \| fine	75.956 \| fine	20.858 \| good	1.619 \| good	11.461 \| good	0.223 \| good
2025-10-26T08:00:00.000Z	64 \| moderate	15.823 \| fine	70.283 \| fine	16.141 \| good	1.729 \| good	10.73 \| good	0.22 \| good
2025-10-26T09:00:00.000Z	60 \| moderate	13.545 \| fine	61.103 \| fine	12.161 \| good	1.839 \| good	10 \| good	0.217 \| good
2025-10-26T10:00:00.000Z	60 \| moderate	14.146 \| fine	63.093 \| fine	11.02 \| good	2.191 \| good	11.102 \| good	0.224 \| good
2025-10-26T11:00:00.000Z	56 \| moderate	12.339 \| fine	55.393 \| fine	11.066 \| good	2.542 \| good	12.204 \| good	0.232 \| good
2025-10-26T12:00:00.000Z	56 \| moderate	11.626 \| good	51.395 \| good	11.242 \| good	2.894 \| good	13.306 \| good	0.239 \| good
2025-10-26T13:00:00.000Z	56 \| moderate	11.692 \| good	52.362 \| good	13.912 \| good	3.062 \| good	11.698 \| good	0.244 \| good
2025-10-26T14:00:00.000Z	56 \| moderate	11.819 \| good	52.642 \| good	18.906 \| good	3.23 \| good	10.09 \| good	0.249 \| good
2025-10-26T15:00:00.000Z	54 \| moderate	11.043 \| good	48.955 \| good	23.874 \| good	3.398 \| good	8.481 \| good	0.254 \| good
2025-10-26T16:00:00.000Z	52 \| moderate	9.987 \| good	44.47 \| good	27.499 \| good	3.439 \| good	7.04 \| good	0.229 \| good
2025-10-26T17:00:00.000Z	49 \| good	9.003 \| good	40.055 \| good	31.166 \| good	3.479 \| good	5.599 \| good	0.204 \| good
2025-10-26T18:00:00.000Z	44 \| good	7.985 \| good	35.068 \| good	36.145 \| good	3.52 \| good	4.157 \| good	0.179 \| good
2025-10-26T19:00:00.000Z	44 \| good	8.109 \| good	35.428 \| good	36.349 \| good	3.075 \| good	4.04 \| good	0.174 \| good
2025-10-26T20:00:00.000Z	44 \| good	8.369 \| good	36.771 \| good	35.988 \| good	2.63 \| good	3.922 \| good	0.169 \| 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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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)

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