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

The PM10 concentration in Markham, Illinois is 15.459 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 0.453 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 40.503 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 2.166 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 3.449 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)

3.45 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.46 μg/m³

155

255

425

605+

Ozone (O₃)

40.50 ppb

201

201+

Sulfur Dioxide (SO₂)

0.45 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.17 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.16 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
2026-04-17T03:00:00.000Z	58 \| moderate	12.548 \| fine	56.795 \| fine	39.621 \| good	1.537 \| good	18.963 \| good	0.239 \| good
2026-04-17T04:00:00.000Z	54 \| moderate	10.656 \| good	46.854 \| good	41.787 \| good	0.846 \| good	18.771 \| good	0.21 \| good
2026-04-17T05:00:00.000Z	54 \| moderate	11.159 \| good	49.559 \| good	39.74 \| good	0.695 \| good	18.501 \| good	0.241 \| good
2026-04-17T06:00:00.000Z	54 \| moderate	11.35 \| good	50.513 \| good	35.701 \| good	0.255 \| good	16.17 \| good	0.226 \| good
2026-04-17T07:00:00.000Z	54 \| moderate	10.934 \| good	47.578 \| good	34.052 \| good	0.409 \| good	12.955 \| good	0.223 \| good
2026-04-17T08:00:00.000Z	60 \| moderate	13.508 \| fine	58.513 \| fine	28.289 \| good	0.382 \| good	15.442 \| good	0.285 \| good
2026-04-17T09:00:00.000Z	81 \| moderate	24.821 \| fine	108.528 \| fine	20.644 \| good	0.456 \| good	13.592 \| good	0.262 \| good
2026-04-17T10:00:00.000Z	75 \| moderate	22.261 \| fine	97.353 \| fine	19.674 \| good	0.542 \| good	14 \| good	0.237 \| good
2026-04-17T11:00:00.000Z	77 \| moderate	23.023 \| fine	101.229 \| fine	15.961 \| good	0.522 \| good	17.994 \| good	0.27 \| good
2026-04-17T12:00:00.000Z	73 \| moderate	21.174 \| fine	92.93 \| fine	13.502 \| good	0.762 \| good	12.636 \| good	0.254 \| good
2026-04-17T13:00:00.000Z	73 \| moderate	20.958 \| fine	92.063 \| fine	9.086 \| good	0.582 \| good	12.028 \| good	0.254 \| good
2026-04-17T14:00:00.000Z	64 \| moderate	15.554 \| fine	69.68 \| fine	10.93 \| good	0.591 \| good	10.844 \| good	0.22 \| good
2026-04-17T15:00:00.000Z	54 \| moderate	10.667 \| good	47.488 \| good	16.761 \| good	1.493 \| good	6.526 \| good	0.233 \| good
2026-04-17T16:00:00.000Z	44 \| good	8.452 \| good	37.458 \| good	24.995 \| good	1.189 \| good	3.999 \| good	0.204 \| good
2026-04-17T17:00:00.000Z	44 \| good	7.958 \| good	35.322 \| good	27.264 \| good	1.273 \| good	2.563 \| good	0.207 \| good
2026-04-17T18:00:00.000Z	44 \| good	7.932 \| good	34.936 \| good	32.725 \| good	0.593 \| good	2.026 \| good	0.207 \| good
2026-04-17T19:00:00.000Z	44 \| good	8.129 \| good	36.091 \| good	35.164 \| good	0.631 \| good	0.976 \| good	0.207 \| good
2026-04-17T20:00:00.000Z	44 \| good	8.155 \| good	36.178 \| good	37.791 \| good	0.632 \| good	1.003 \| good	0.189 \| good
2026-04-17T21:00:00.000Z	49 \| good	8.79 \| good	38.829 \| good	38.538 \| good	0.498 \| good	1.4 \| good	0.176 \| good
2026-04-17T22:00:00.000Z	49 \| good	8.909 \| good	39.388 \| good	41.792 \| good	0.488 \| good	1.581 \| good	0.191 \| good
2026-04-17T23:00:00.000Z	49 \| good	9.075 \| good	40.293 \| good	45.348 \| good	0.461 \| good	1.517 \| good	0.191 \| good
2026-04-18T00:00:00.000Z	49 \| good	9.093 \| good	40.379 \| good	43.669 \| good	0.386 \| good	2.128 \| good	0.207 \| good
2026-04-18T01:00:00.000Z	49 \| good	9.355 \| good	42.185 \| good	39.992 \| good	0.385 \| good	2.653 \| good	0.191 \| good
2026-04-18T02:00:00.000Z	52 \| moderate	9.592 \| good	42.919 \| good	39.556 \| good	0.377 \| good	3.065 \| good	0.191 \| good
2026-04-18T03:00:00.000Z	52 \| moderate	9.66 \| good	42.946 \| good	41.472 \| good	0.47 \| good	2.627 \| good	0.151 \| good
2026-04-18T04:00:00.000Z	44 \| good	8.027 \| good	35.891 \| good	38.995 \| good	0.378 \| good	2.999 \| good	0.166 \| good
2026-04-18T05:00:00.000Z	44 \| good	6.209 \| good	27.217 \| good	47.2 \| good	0.283 \| good	3.037 \| good	0.149 \| good
2026-04-18T06:00:00.000Z	43 \| good	5.923 \| good	25.917 \| good	45.892 \| good	0.284 \| good	2.482 \| good	0.166 \| good
2026-04-18T07:00:00.000Z	44 \| good	4.782 \| good	19.732 \| good	46.998 \| good	0.223 \| good	4.563 \| good	0.166 \| good
2026-04-18T08:00:00.000Z	46 \| good	4.324 \| good	17.765 \| good	49.832 \| good	0.191 \| good	1.616 \| good	0.166 \| good
2026-04-18T09:00:00.000Z	45 \| good	4.073 \| good	17.361 \| good	48.989 \| good	0.257 \| good	1.055 \| good	0.149 \| good
2026-04-18T10:00:00.000Z	43 \| good	3.665 \| good	16.2 \| good	45.749 \| good	0.331 \| good	0.958 \| good	0.134 \| good
2026-04-18T11:00:00.000Z	27 \| good	4.307 \| good	19.256 \| good	29.444 \| good	0.248 \| good	2.016 \| good	0.149 \| good
2026-04-18T12:00:00.000Z	27 \| good	4.929 \| good	22.078 \| good	27.722 \| good	0.248 \| good	1.549 \| good	0.166 \| good
2026-04-18T13:00:00.000Z	27 \| good	5.067 \| good	22.771 \| good	26.742 \| good	0.177 \| good	2.408 \| good	0.166 \| good
2026-04-18T14:00:00.000Z	22 \| good	4.322 \| good	19.145 \| good	24.299 \| good	0.243 \| good	4.488 \| good	0.134 \| good
2026-04-18T15:00:00.000Z	22 \| good	4.489 \| good	19.922 \| good	23.884 \| good	0.181 \| good	4.566 \| good	0.16 \| good
2026-04-18T16:00:00.000Z	27 \| good	4.9 \| good	21.743 \| good	24.133 \| good	0.17 \| good	2.943 \| good	0.16 \| good
2026-04-18T17:00:00.000Z	27 \| good	4.943 \| good	21.916 \| good	25.993 \| good	0.224 \| good	2.548 \| good	0.166 \| good
2026-04-18T18:00:00.000Z	27 \| good	4.638 \| good	20.407 \| good	27.686 \| good	0.228 \| good	1.901 \| good	0.16 \| good
2026-04-18T19:00:00.000Z	26 \| good	4.158 \| good	18.25 \| good	28.32 \| good	0.319 \| good	1.343 \| good	0.16 \| good
2026-04-18T20:00:00.000Z	31 \| good	3.77 \| good	16.852 \| good	34.439 \| good	0.278 \| good	2.492 \| good	0.16 \| good
2026-04-18T21:00:00.000Z	34 \| good	3.532 \| good	16.009 \| good	37.005 \| good	0.325 \| good	1.147 \| good	0.16 \| good
2026-04-18T22:00:00.000Z	32 \| good	3.248 \| good	13.764 \| good	35.152 \| good	0.329 \| good	1.815 \| good	0.16 \| good
2026-04-18T23:00:00.000Z	36 \| good	3.284 \| good	14.653 \| good	38.584 \| good	0.329 \| good	2.496 \| good	0.16 \| good
2026-04-19T00:00:00.000Z	38 \| good	3.38 \| good	14.992 \| good	40.89 \| good	0.527 \| good	2.362 \| good	0.16 \| good
2026-04-19T01:00:00.000Z	38 \| good	3.449 \| good	15.459 \| good	40.503 \| good	0.453 \| good	2.166 \| good	0.16 \| good
2026-04-19T02:00:00.000Z	38 \| good	3.449 \| good	15.459 \| good	40.503 \| good	0.453 \| good	2.166 \| good	0.16 \| good
2026-04-19T03:00:00.000Z	19 \| good	3.091 \| good	13.61 \| good	21.41 \| good	0.845 \| good	3.913 \| good	0.153 \| good
2026-04-19T04:00:00.000Z	23 \| good	3.08 \| good	13.569 \| good	24.6 \| good	0.896 \| good	4.308 \| good	0.157 \| good
2026-04-19T05:00:00.000Z	20 \| good	2.975 \| good	12.032 \| good	22.213 \| good	0.947 \| good	4.704 \| good	0.16 \| good
2026-04-19T06:00:00.000Z	27 \| good	5.32 \| good	22.889 \| good	18.852 \| good	0.997 \| good	5.099 \| good	0.164 \| good
2026-04-19T07:00:00.000Z	38 \| good	6.723 \| good	29.869 \| good	15.596 \| good	1.02 \| good	5.145 \| good	0.163 \| good
2026-04-19T08:00:00.000Z	38 \| good	6.843 \| good	30.079 \| good	13.818 \| good	1.042 \| good	5.191 \| good	0.162 \| good
2026-04-19T09:00:00.000Z	38 \| good	6.87 \| good	30.234 \| good	11.266 \| good	1.064 \| good	5.237 \| good	0.162 \| good
2026-04-19T10:00:00.000Z	44 \| good	8.093 \| good	35.284 \| good	11.428 \| good	1.065 \| good	5.563 \| good	0.164 \| good
2026-04-19T11:00:00.000Z	54 \| moderate	10.583 \| good	47.166 \| good	12.885 \| good	1.065 \| good	5.889 \| good	0.166 \| good
2026-04-19T12:00:00.000Z	44 \| good	7.931 \| good	35.047 \| good	19.384 \| good	1.066 \| good	6.214 \| good	0.169 \| good
2026-04-19T13:00:00.000Z	22 \| good	4.46 \| good	19.003 \| good	22.37 \| good	1.142 \| good	5.901 \| good	0.171 \| good
2026-04-19T14:00:00.000Z	24 \| good	3.032 \| good	12.184 \| good	26.485 \| good	1.219 \| good	5.587 \| good	0.173 \| good
2026-04-19T15:00:00.000Z	26 \| good	3.927 \| good	16.984 \| good	27.803 \| good	1.296 \| good	5.274 \| good	0.174 \| good
2026-04-19T16:00:00.000Z	28 \| good	4.528 \| good	19.903 \| good	30.293 \| good	1.142 \| good	4.184 \| good	0.168 \| good
2026-04-19T17:00:00.000Z	33 \| good	5.762 \| good	25.084 \| good	31.349 \| good	0.988 \| good	3.094 \| good	0.161 \| good
2026-04-19T18:00:00.000Z	33 \| good	6.303 \| good	28.076 \| good	33.235 \| good	0.835 \| good	2.003 \| good	0.154 \| good
2026-04-19T19:00:00.000Z	33 \| good	5.523 \| good	23.87 \| good	35.086 \| good	0.778 \| good	1.906 \| good	0.154 \| good
2026-04-19T20:00:00.000Z	35 \| good	4.175 \| good	18.238 \| good	37.556 \| good	0.721 \| good	1.808 \| good	0.155 \| good
2026-04-19T21:00:00.000Z	36 \| good	5.718 \| good	24.984 \| good	39.109 \| good	0.663 \| good	1.711 \| good	0.155 \| good
2026-04-19T22:00:00.000Z	39 \| good	6.207 \| good	27.188 \| good	41.616 \| good	0.787 \| good	2.926 \| good	0.162 \| good
2026-04-19T23:00:00.000Z	39 \| good	6.56 \| good	28.984 \| good	41.695 \| good	0.91 \| good	4.142 \| good	0.169 \| good
2026-04-20T00:00:00.000Z	37 \| good	5.468 \| good	23.815 \| good	40.026 \| good	1.033 \| good	5.357 \| good	0.175 \| good
2026-04-20T01:00:00.000Z	27 \| good	4.51 \| good	19.746 \| good	28.427 \| good	1.202 \| good	8.078 \| good	0.188 \| good
2026-04-20T02:00:00.000Z	27 \| good	4.891 \| good	20.925 \| good	23.806 \| good	1.372 \| good	10.8 \| good	0.2 \| good
2026-04-20T03:00:00.000Z	27 \| good	5.009 \| good	21.835 \| good	25.793 \| good	1.541 \| good	13.521 \| good	0.213 \| good
2026-04-20T04:00:00.000Z	25 \| good	4.403 \| good	18.978 \| good	27.008 \| good	1.473 \| good	12.435 \| good	0.207 \| good
2026-04-20T05:00:00.000Z	22 \| good	3.64 \| good	15.976 \| good	18.652 \| good	1.406 \| good	11.348 \| good	0.202 \| good
2026-04-20T06:00:00.000Z	33 \| good	5.666 \| good	23.982 \| good	18.603 \| good	1.338 \| good	10.261 \| good	0.197 \| good
2026-04-20T07:00:00.000Z	49 \| good	8.87 \| good	39.002 \| good	13.58 \| good	1.332 \| good	9.472 \| good	0.192 \| good
2026-04-20T08:00:00.000Z	54 \| moderate	10.901 \| good	48.048 \| good	9.457 \| good	1.326 \| good	8.682 \| good	0.186 \| good
2026-04-20T09:00:00.000Z	52 \| moderate	9.782 \| good	43.682 \| good	5.718 \| good	1.32 \| good	7.893 \| good	0.181 \| good
2026-04-20T10:00:00.000Z	54 \| moderate	10.788 \| good	47.79 \| good	2.958 \| good	1.437 \| good	8.295 \| good	0.188 \| good
2026-04-20T11:00:00.000Z	60 \| moderate	13.88 \| fine	62.309 \| fine	4.107 \| good	1.554 \| good	8.698 \| good	0.194 \| good
2026-04-20T12:00:00.000Z	49 \| good	8.921 \| good	40.305 \| good	17.035 \| good	1.671 \| good	9.1 \| good	0.201 \| good
2026-04-20T13:00:00.000Z	23 \| good	3.193 \| good	13.9 \| good	24.755 \| good	1.72 \| good	7.31 \| good	0.191 \| good
2026-04-20T14:00:00.000Z	26 \| good	1.443 \| good	6.08 \| good	28.207 \| good	1.769 \| good	5.52 \| good	0.18 \| good
2026-04-20T15:00:00.000Z	29 \| good	2.458 \| good	10.196 \| good	30.709 \| good	1.819 \| good	3.73 \| good	0.169 \| good
2026-04-20T16:00:00.000Z	30 \| good	4.055 \| good	18.04 \| good	31.589 \| good	1.759 \| good	3.393 \| good	0.166 \| good
2026-04-20T17:00:00.000Z	33 \| good	5.697 \| good	24.38 \| good	31.705 \| good	1.7 \| good	3.057 \| good	0.163 \| good
2026-04-20T18:00:00.000Z	33 \| good	6.136 \| good	27.01 \| good	33.312 \| good	1.641 \| good	2.721 \| good	0.16 \| good
2026-04-20T19:00:00.000Z	38 \| good	7.199 \| good	31.757 \| good	36.801 \| good	1.603 \| good	2.587 \| good	0.158 \| good
2026-04-20T20:00:00.000Z	39 \| good	7.344 \| good	32.004 \| good	41.907 \| good	1.565 \| good	2.453 \| good	0.157 \| good
2026-04-20T21:00:00.000Z	41 \| good	7.433 \| good	32.91 \| good	43.789 \| good	1.527 \| good	2.319 \| good	0.155 \| good
2026-04-20T22:00:00.000Z	44 \| good	7.858 \| good	34.045 \| good	43.482 \| good	1.41 \| good	2.942 \| good	0.157 \| good
2026-04-20T23:00:00.000Z	49 \| good	9.002 \| good	40.549 \| good	41.185 \| good	1.293 \| good	3.565 \| good	0.158 \| good
2026-04-21T00:00:00.000Z	45 \| good	7.753 \| good	8.572 \| good	49.262 \| good	1.178 \| good	4.152 \| good	0.16 \| good
2026-04-21T01:00:00.000Z	44 \| good	8.244 \| good	35.899 \| good	28.413 \| good	1.204 \| good	4.927 \| good	0.166 \| good
2026-04-21T02:00:00.000Z	44 \| good	8.308 \| good	36.683 \| good	24.523 \| good	1.232 \| good	5.665 \| good	0.172 \| good

Markham

Get reliable air quality data to drive your business

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

0.16ppm

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 2026-04-18.

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 03:00:00 on 2026-04-18.

What is the AQI in Markham, Illinois right now?

As of now, the AQI in Markham, Illinois is 38, indicating Good conditions.

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

Markham, Illinois air has the highest levels of O3.

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 3.449 μg/m³.

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

The PM₁₀ concentration in Markham, Illinois is 15.459 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 0.16 ppm.

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

Currently, Markham, Illinois has a sulfur dioxide (SO₂) concentration of 0.453 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 40.503 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 2.166 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-17T03:00:00.000Z	58 \| moderate	12.548 \| fine	56.795 \| fine	39.621 \| good	1.537 \| good	18.963 \| good	0.239 \| good
2026-04-17T04:00:00.000Z	54 \| moderate	10.656 \| good	46.854 \| good	41.787 \| good	0.846 \| good	18.771 \| good	0.21 \| good
2026-04-17T05:00:00.000Z	54 \| moderate	11.159 \| good	49.559 \| good	39.74 \| good	0.695 \| good	18.501 \| good	0.241 \| good
2026-04-17T06:00:00.000Z	54 \| moderate	11.35 \| good	50.513 \| good	35.701 \| good	0.255 \| good	16.17 \| good	0.226 \| good
2026-04-17T07:00:00.000Z	54 \| moderate	10.934 \| good	47.578 \| good	34.052 \| good	0.409 \| good	12.955 \| good	0.223 \| good
2026-04-17T08:00:00.000Z	60 \| moderate	13.508 \| fine	58.513 \| fine	28.289 \| good	0.382 \| good	15.442 \| good	0.285 \| good
2026-04-17T09:00:00.000Z	81 \| moderate	24.821 \| fine	108.528 \| fine	20.644 \| good	0.456 \| good	13.592 \| good	0.262 \| good
2026-04-17T10:00:00.000Z	75 \| moderate	22.261 \| fine	97.353 \| fine	19.674 \| good	0.542 \| good	14 \| good	0.237 \| good
2026-04-17T11:00:00.000Z	77 \| moderate	23.023 \| fine	101.229 \| fine	15.961 \| good	0.522 \| good	17.994 \| good	0.27 \| good
2026-04-17T12:00:00.000Z	73 \| moderate	21.174 \| fine	92.93 \| fine	13.502 \| good	0.762 \| good	12.636 \| good	0.254 \| good
2026-04-17T13:00:00.000Z	73 \| moderate	20.958 \| fine	92.063 \| fine	9.086 \| good	0.582 \| good	12.028 \| good	0.254 \| good
2026-04-17T14:00:00.000Z	64 \| moderate	15.554 \| fine	69.68 \| fine	10.93 \| good	0.591 \| good	10.844 \| good	0.22 \| good
2026-04-17T15:00:00.000Z	54 \| moderate	10.667 \| good	47.488 \| good	16.761 \| good	1.493 \| good	6.526 \| good	0.233 \| good
2026-04-17T16:00:00.000Z	44 \| good	8.452 \| good	37.458 \| good	24.995 \| good	1.189 \| good	3.999 \| good	0.204 \| good
2026-04-17T17:00:00.000Z	44 \| good	7.958 \| good	35.322 \| good	27.264 \| good	1.273 \| good	2.563 \| good	0.207 \| good
2026-04-17T18:00:00.000Z	44 \| good	7.932 \| good	34.936 \| good	32.725 \| good	0.593 \| good	2.026 \| good	0.207 \| good
2026-04-17T19:00:00.000Z	44 \| good	8.129 \| good	36.091 \| good	35.164 \| good	0.631 \| good	0.976 \| good	0.207 \| good
2026-04-17T20:00:00.000Z	44 \| good	8.155 \| good	36.178 \| good	37.791 \| good	0.632 \| good	1.003 \| good	0.189 \| good
2026-04-17T21:00:00.000Z	49 \| good	8.79 \| good	38.829 \| good	38.538 \| good	0.498 \| good	1.4 \| good	0.176 \| good
2026-04-17T22:00:00.000Z	49 \| good	8.909 \| good	39.388 \| good	41.792 \| good	0.488 \| good	1.581 \| good	0.191 \| good
2026-04-17T23:00:00.000Z	49 \| good	9.075 \| good	40.293 \| good	45.348 \| good	0.461 \| good	1.517 \| good	0.191 \| good
2026-04-18T00:00:00.000Z	49 \| good	9.093 \| good	40.379 \| good	43.669 \| good	0.386 \| good	2.128 \| good	0.207 \| good
2026-04-18T01:00:00.000Z	49 \| good	9.355 \| good	42.185 \| good	39.992 \| good	0.385 \| good	2.653 \| good	0.191 \| good
2026-04-18T02:00:00.000Z	52 \| moderate	9.592 \| good	42.919 \| good	39.556 \| good	0.377 \| good	3.065 \| good	0.191 \| good
2026-04-18T03:00:00.000Z	52 \| moderate	9.66 \| good	42.946 \| good	41.472 \| good	0.47 \| good	2.627 \| good	0.151 \| good
2026-04-18T04:00:00.000Z	44 \| good	8.027 \| good	35.891 \| good	38.995 \| good	0.378 \| good	2.999 \| good	0.166 \| good
2026-04-18T05:00:00.000Z	44 \| good	6.209 \| good	27.217 \| good	47.2 \| good	0.283 \| good	3.037 \| good	0.149 \| good
2026-04-18T06:00:00.000Z	43 \| good	5.923 \| good	25.917 \| good	45.892 \| good	0.284 \| good	2.482 \| good	0.166 \| good
2026-04-18T07:00:00.000Z	44 \| good	4.782 \| good	19.732 \| good	46.998 \| good	0.223 \| good	4.563 \| good	0.166 \| good
2026-04-18T08:00:00.000Z	46 \| good	4.324 \| good	17.765 \| good	49.832 \| good	0.191 \| good	1.616 \| good	0.166 \| good
2026-04-18T09:00:00.000Z	45 \| good	4.073 \| good	17.361 \| good	48.989 \| good	0.257 \| good	1.055 \| good	0.149 \| good
2026-04-18T10:00:00.000Z	43 \| good	3.665 \| good	16.2 \| good	45.749 \| good	0.331 \| good	0.958 \| good	0.134 \| good
2026-04-18T11:00:00.000Z	27 \| good	4.307 \| good	19.256 \| good	29.444 \| good	0.248 \| good	2.016 \| good	0.149 \| good
2026-04-18T12:00:00.000Z	27 \| good	4.929 \| good	22.078 \| good	27.722 \| good	0.248 \| good	1.549 \| good	0.166 \| good
2026-04-18T13:00:00.000Z	27 \| good	5.067 \| good	22.771 \| good	26.742 \| good	0.177 \| good	2.408 \| good	0.166 \| good
2026-04-18T14:00:00.000Z	22 \| good	4.322 \| good	19.145 \| good	24.299 \| good	0.243 \| good	4.488 \| good	0.134 \| good
2026-04-18T15:00:00.000Z	22 \| good	4.489 \| good	19.922 \| good	23.884 \| good	0.181 \| good	4.566 \| good	0.16 \| good
2026-04-18T16:00:00.000Z	27 \| good	4.9 \| good	21.743 \| good	24.133 \| good	0.17 \| good	2.943 \| good	0.16 \| good
2026-04-18T17:00:00.000Z	27 \| good	4.943 \| good	21.916 \| good	25.993 \| good	0.224 \| good	2.548 \| good	0.166 \| good
2026-04-18T18:00:00.000Z	27 \| good	4.638 \| good	20.407 \| good	27.686 \| good	0.228 \| good	1.901 \| good	0.16 \| good
2026-04-18T19:00:00.000Z	26 \| good	4.158 \| good	18.25 \| good	28.32 \| good	0.319 \| good	1.343 \| good	0.16 \| good
2026-04-18T20:00:00.000Z	31 \| good	3.77 \| good	16.852 \| good	34.439 \| good	0.278 \| good	2.492 \| good	0.16 \| good
2026-04-18T21:00:00.000Z	34 \| good	3.532 \| good	16.009 \| good	37.005 \| good	0.325 \| good	1.147 \| good	0.16 \| good
2026-04-18T22:00:00.000Z	32 \| good	3.248 \| good	13.764 \| good	35.152 \| good	0.329 \| good	1.815 \| good	0.16 \| good
2026-04-18T23:00:00.000Z	36 \| good	3.284 \| good	14.653 \| good	38.584 \| good	0.329 \| good	2.496 \| good	0.16 \| good
2026-04-19T00:00:00.000Z	38 \| good	3.38 \| good	14.992 \| good	40.89 \| good	0.527 \| good	2.362 \| good	0.16 \| good
2026-04-19T01:00:00.000Z	38 \| good	3.449 \| good	15.459 \| good	40.503 \| good	0.453 \| good	2.166 \| good	0.16 \| good
2026-04-19T02:00:00.000Z	38 \| good	3.449 \| good	15.459 \| good	40.503 \| good	0.453 \| good	2.166 \| good	0.16 \| good
2026-04-19T03:00:00.000Z	19 \| good	3.091 \| good	13.61 \| good	21.41 \| good	0.845 \| good	3.913 \| good	0.153 \| good
2026-04-19T04:00:00.000Z	23 \| good	3.08 \| good	13.569 \| good	24.6 \| good	0.896 \| good	4.308 \| good	0.157 \| good
2026-04-19T05:00:00.000Z	20 \| good	2.975 \| good	12.032 \| good	22.213 \| good	0.947 \| good	4.704 \| good	0.16 \| good
2026-04-19T06:00:00.000Z	27 \| good	5.32 \| good	22.889 \| good	18.852 \| good	0.997 \| good	5.099 \| good	0.164 \| good
2026-04-19T07:00:00.000Z	38 \| good	6.723 \| good	29.869 \| good	15.596 \| good	1.02 \| good	5.145 \| good	0.163 \| good
2026-04-19T08:00:00.000Z	38 \| good	6.843 \| good	30.079 \| good	13.818 \| good	1.042 \| good	5.191 \| good	0.162 \| good
2026-04-19T09:00:00.000Z	38 \| good	6.87 \| good	30.234 \| good	11.266 \| good	1.064 \| good	5.237 \| good	0.162 \| good
2026-04-19T10:00:00.000Z	44 \| good	8.093 \| good	35.284 \| good	11.428 \| good	1.065 \| good	5.563 \| good	0.164 \| good
2026-04-19T11:00:00.000Z	54 \| moderate	10.583 \| good	47.166 \| good	12.885 \| good	1.065 \| good	5.889 \| good	0.166 \| good
2026-04-19T12:00:00.000Z	44 \| good	7.931 \| good	35.047 \| good	19.384 \| good	1.066 \| good	6.214 \| good	0.169 \| good
2026-04-19T13:00:00.000Z	22 \| good	4.46 \| good	19.003 \| good	22.37 \| good	1.142 \| good	5.901 \| good	0.171 \| good
2026-04-19T14:00:00.000Z	24 \| good	3.032 \| good	12.184 \| good	26.485 \| good	1.219 \| good	5.587 \| good	0.173 \| good
2026-04-19T15:00:00.000Z	26 \| good	3.927 \| good	16.984 \| good	27.803 \| good	1.296 \| good	5.274 \| good	0.174 \| good
2026-04-19T16:00:00.000Z	28 \| good	4.528 \| good	19.903 \| good	30.293 \| good	1.142 \| good	4.184 \| good	0.168 \| good
2026-04-19T17:00:00.000Z	33 \| good	5.762 \| good	25.084 \| good	31.349 \| good	0.988 \| good	3.094 \| good	0.161 \| good
2026-04-19T18:00:00.000Z	33 \| good	6.303 \| good	28.076 \| good	33.235 \| good	0.835 \| good	2.003 \| good	0.154 \| good
2026-04-19T19:00:00.000Z	33 \| good	5.523 \| good	23.87 \| good	35.086 \| good	0.778 \| good	1.906 \| good	0.154 \| good
2026-04-19T20:00:00.000Z	35 \| good	4.175 \| good	18.238 \| good	37.556 \| good	0.721 \| good	1.808 \| good	0.155 \| good
2026-04-19T21:00:00.000Z	36 \| good	5.718 \| good	24.984 \| good	39.109 \| good	0.663 \| good	1.711 \| good	0.155 \| good
2026-04-19T22:00:00.000Z	39 \| good	6.207 \| good	27.188 \| good	41.616 \| good	0.787 \| good	2.926 \| good	0.162 \| good
2026-04-19T23:00:00.000Z	39 \| good	6.56 \| good	28.984 \| good	41.695 \| good	0.91 \| good	4.142 \| good	0.169 \| good
2026-04-20T00:00:00.000Z	37 \| good	5.468 \| good	23.815 \| good	40.026 \| good	1.033 \| good	5.357 \| good	0.175 \| good
2026-04-20T01:00:00.000Z	27 \| good	4.51 \| good	19.746 \| good	28.427 \| good	1.202 \| good	8.078 \| good	0.188 \| good
2026-04-20T02:00:00.000Z	27 \| good	4.891 \| good	20.925 \| good	23.806 \| good	1.372 \| good	10.8 \| good	0.2 \| good
2026-04-20T03:00:00.000Z	27 \| good	5.009 \| good	21.835 \| good	25.793 \| good	1.541 \| good	13.521 \| good	0.213 \| good
2026-04-20T04:00:00.000Z	25 \| good	4.403 \| good	18.978 \| good	27.008 \| good	1.473 \| good	12.435 \| good	0.207 \| good
2026-04-20T05:00:00.000Z	22 \| good	3.64 \| good	15.976 \| good	18.652 \| good	1.406 \| good	11.348 \| good	0.202 \| good
2026-04-20T06:00:00.000Z	33 \| good	5.666 \| good	23.982 \| good	18.603 \| good	1.338 \| good	10.261 \| good	0.197 \| good
2026-04-20T07:00:00.000Z	49 \| good	8.87 \| good	39.002 \| good	13.58 \| good	1.332 \| good	9.472 \| good	0.192 \| good
2026-04-20T08:00:00.000Z	54 \| moderate	10.901 \| good	48.048 \| good	9.457 \| good	1.326 \| good	8.682 \| good	0.186 \| good
2026-04-20T09:00:00.000Z	52 \| moderate	9.782 \| good	43.682 \| good	5.718 \| good	1.32 \| good	7.893 \| good	0.181 \| good
2026-04-20T10:00:00.000Z	54 \| moderate	10.788 \| good	47.79 \| good	2.958 \| good	1.437 \| good	8.295 \| good	0.188 \| good
2026-04-20T11:00:00.000Z	60 \| moderate	13.88 \| fine	62.309 \| fine	4.107 \| good	1.554 \| good	8.698 \| good	0.194 \| good
2026-04-20T12:00:00.000Z	49 \| good	8.921 \| good	40.305 \| good	17.035 \| good	1.671 \| good	9.1 \| good	0.201 \| good
2026-04-20T13:00:00.000Z	23 \| good	3.193 \| good	13.9 \| good	24.755 \| good	1.72 \| good	7.31 \| good	0.191 \| good
2026-04-20T14:00:00.000Z	26 \| good	1.443 \| good	6.08 \| good	28.207 \| good	1.769 \| good	5.52 \| good	0.18 \| good
2026-04-20T15:00:00.000Z	29 \| good	2.458 \| good	10.196 \| good	30.709 \| good	1.819 \| good	3.73 \| good	0.169 \| good
2026-04-20T16:00:00.000Z	30 \| good	4.055 \| good	18.04 \| good	31.589 \| good	1.759 \| good	3.393 \| good	0.166 \| good
2026-04-20T17:00:00.000Z	33 \| good	5.697 \| good	24.38 \| good	31.705 \| good	1.7 \| good	3.057 \| good	0.163 \| good
2026-04-20T18:00:00.000Z	33 \| good	6.136 \| good	27.01 \| good	33.312 \| good	1.641 \| good	2.721 \| good	0.16 \| good
2026-04-20T19:00:00.000Z	38 \| good	7.199 \| good	31.757 \| good	36.801 \| good	1.603 \| good	2.587 \| good	0.158 \| good
2026-04-20T20:00:00.000Z	39 \| good	7.344 \| good	32.004 \| good	41.907 \| good	1.565 \| good	2.453 \| good	0.157 \| good
2026-04-20T21:00:00.000Z	41 \| good	7.433 \| good	32.91 \| good	43.789 \| good	1.527 \| good	2.319 \| good	0.155 \| good
2026-04-20T22:00:00.000Z	44 \| good	7.858 \| good	34.045 \| good	43.482 \| good	1.41 \| good	2.942 \| good	0.157 \| good
2026-04-20T23:00:00.000Z	49 \| good	9.002 \| good	40.549 \| good	41.185 \| good	1.293 \| good	3.565 \| good	0.158 \| good
2026-04-21T00:00:00.000Z	45 \| good	7.753 \| good	8.572 \| good	49.262 \| good	1.178 \| good	4.152 \| good	0.16 \| good
2026-04-21T01:00:00.000Z	44 \| good	8.244 \| good	35.899 \| good	28.413 \| good	1.204 \| good	4.927 \| good	0.166 \| good
2026-04-21T02:00:00.000Z	44 \| good	8.308 \| good	36.683 \| good	24.523 \| good	1.232 \| good	5.665 \| good	0.172 \| 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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