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

The PM10 concentration in Markham, Illinois is 83.43 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 0.358 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 44.755 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 5.66 ppb.

Live air quality index in Markham, Illinois today

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

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)

19.02 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

83.43 μg/m³

155

255

425

605+

Ozone (O₃)

44.76 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.66 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.51 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
2025-07-21T04:00:00.000Z	49 \| good	8.729 \| good	39.139 \| good	32.968 \| good	0.228 \| good	3.112 \| good	0.255 \| good
2025-07-21T05:00:00.000Z	64 \| moderate	16.197 \| fine	71.595 \| fine	32.965 \| good	0.316 \| good	2.665 \| good	0.272 \| good
2025-07-21T06:00:00.000Z	66 \| moderate	16.691 \| fine	73.935 \| fine	33.045 \| good	0.45 \| good	3.444 \| good	0.253 \| good
2025-07-21T07:00:00.000Z	86 \| moderate	28.262 \| fine	123.282 \| fine	32.005 \| good	0.665 \| good	1.814 \| good	0.236 \| good
2025-07-21T08:00:00.000Z	88 \| moderate	28.626 \| fine	124.669 \| fine	28.437 \| good	0.304 \| good	3.268 \| good	0.203 \| good
2025-07-21T09:00:00.000Z	92 \| moderate	31.427 \| fine	137.146 \| fine	24.256 \| good	0.226 \| good	3.956 \| good	0.217 \| good
2025-07-21T10:00:00.000Z	92 \| moderate	30.904 \| fine	135.804 \| fine	22.495 \| good	0.299 \| good	4.916 \| good	0.217 \| good
2025-07-21T11:00:00.000Z	86 \| moderate	27.51 \| fine	121.405 \| fine	18.7 \| good	0.827 \| good	4.37 \| good	0.182 \| good
2025-07-21T12:00:00.000Z	84 \| moderate	27.267 \| fine	120.365 \| fine	18.251 \| good	1.113 \| good	6.08 \| good	0.182 \| good
2025-07-21T13:00:00.000Z	62 \| moderate	15.024 \| fine	66.776 \| fine	18.686 \| good	1.107 \| good	8.001 \| good	0.179 \| good
2025-07-21T14:00:00.000Z	56 \| moderate	11.612 \| good	52.378 \| good	21.772 \| good	0.683 \| good	4.571 \| good	0.16 \| good
2025-07-21T15:00:00.000Z	54 \| moderate	11.456 \| good	51.598 \| good	23.611 \| good	4.011 \| good	4 \| good	0.16 \| good
2025-07-21T16:00:00.000Z	52 \| moderate	10.354 \| good	45.816 \| good	25.407 \| good	4.264 \| good	2.239 \| good	0.146 \| good
2025-07-21T17:00:00.000Z	54 \| moderate	10.813 \| good	48.654 \| good	31.085 \| good	1.58 \| good	1.369 \| good	0.132 \| good
2025-07-21T18:00:00.000Z	60 \| moderate	13.519 \| fine	60.515 \| fine	36.437 \| good	1.365 \| good	1.585 \| good	0.172 \| good
2025-07-21T19:00:00.000Z	60 \| moderate	13.725 \| fine	61.382 \| fine	45.358 \| good	2.035 \| good	1.645 \| good	0.173 \| good
2025-07-21T20:00:00.000Z	62 \| moderate	14.753 \| fine	66.643 \| fine	50.552 \| good	1.134 \| good	1.209 \| good	0.194 \| good
2025-07-21T21:00:00.000Z	64 \| moderate	15.736 \| fine	69.779 \| fine	54.258 \| good	3.346 \| good	1.237 \| good	0.198 \| good
2025-07-21T22:00:00.000Z	67 \| moderate	17.623 \| fine	78.1 \| fine	54.157 \| good	3.529 \| good	1.163 \| good	0.228 \| good
2025-07-21T23:00:00.000Z	75 \| moderate	22.074 \| fine	96.524 \| fine	53.804 \| good	1.985 \| good	0.984 \| good	0.236 \| good
2025-07-22T00:00:00.000Z	77 \| moderate	23.307 \| fine	102.069 \| fine	49.347 \| good	1.745 \| good	2.26 \| good	0.27 \| good
2025-07-22T01:00:00.000Z	79 \| moderate	23.517 \| fine	102.978 \| fine	47.708 \| good	2.902 \| good	2.796 \| good	0.287 \| good
2025-07-22T02:00:00.000Z	81 \| moderate	25.056 \| fine	109.151 \| fine	45.997 \| good	2.32 \| good	2.561 \| good	0.265 \| good
2025-07-22T03:00:00.000Z	58 \| moderate	13.382 \| fine	60.36 \| fine	25.038 \| good	1.117 \| good	8.834 \| good	0.297 \| good
2025-07-22T04:00:00.000Z	86 \| moderate	28.095 \| fine	122.565 \| fine	41.076 \| good	0.322 \| good	7.122 \| good	0.218 \| good
2025-07-22T05:00:00.000Z	90 \| moderate	29.917 \| fine	130.062 \| fine	40.06 \| good	0.413 \| good	8.689 \| good	0.18 \| good
2025-07-22T06:00:00.000Z	90 \| moderate	29.917 \| fine	130.062 \| fine	37.639 \| good	1.141 \| good	10.432 \| good	0.181 \| good
2025-07-22T07:00:00.000Z	92 \| moderate	30.98 \| fine	135.024 \| fine	30.257 \| good	0.861 \| good	10.057 \| good	0.152 \| good
2025-07-22T08:00:00.000Z	92 \| moderate	30.874 \| fine	134.312 \| fine	25.379 \| good	0.45 \| good	14.072 \| good	0.152 \| good
2025-07-22T09:00:00.000Z	92 \| moderate	31.071 \| fine	135.131 \| fine	20.058 \| good	0.276 \| good	12.619 \| good	0.14 \| good
2025-07-22T10:00:00.000Z	92 \| moderate	30.539 \| fine	132.04 \| fine	16.231 \| good	0.315 \| good	10.787 \| good	0.152 \| good
2025-07-22T11:00:00.000Z	90 \| moderate	30.051 \| fine	130.8 \| fine	17.867 \| good	0.538 \| good	8.472 \| good	0.206 \| good
2025-07-22T12:00:00.000Z	90 \| moderate	29.991 \| fine	130.627 \| fine	17.498 \| good	0.532 \| good	8.265 \| good	0.233 \| good
2025-07-22T13:00:00.000Z	88 \| moderate	29.239 \| fine	127.265 \| fine	21.487 \| good	0.275 \| good	6.948 \| good	0.206 \| good
2025-07-22T14:00:00.000Z	88 \| moderate	29.213 \| fine	127.092 \| fine	23.003 \| good	0.516 \| good	4.414 \| good	0.213 \| good
2025-07-22T15:00:00.000Z	88 \| moderate	29.024 \| fine	126.457 \| fine	26.338 \| good	0.544 \| good	4.73 \| good	0.244 \| good
2025-07-22T16:00:00.000Z	88 \| moderate	28.958 \| fine	125.332 \| fine	28.552 \| good	1.253 \| good	3.49 \| good	0.23 \| good
2025-07-22T17:00:00.000Z	88 \| moderate	28.958 \| fine	125.332 \| fine	41.242 \| good	0.919 \| good	2.002 \| good	0.23 \| good
2025-07-22T18:00:00.000Z	86 \| moderate	28.192 \| fine	122.569 \| fine	45.63 \| good	0.918 \| good	1.992 \| good	0.23 \| good
2025-07-22T19:00:00.000Z	86 \| moderate	27.965 \| fine	121.815 \| fine	48.784 \| good	0.684 \| good	2.019 \| good	0.246 \| good
2025-07-22T20:00:00.000Z	81 \| moderate	25.49 \| fine	111.466 \| fine	50.037 \| good	0.514 \| good	1.631 \| good	0.273 \| good
2025-07-22T21:00:00.000Z	81 \| moderate	25.386 \| fine	110.946 \| fine	50.53 \| good	0.414 \| good	2.202 \| good	0.366 \| good
2025-07-22T22:00:00.000Z	75 \| moderate	22.135 \| fine	97.18 \| fine	51.731 \| good	0.615 \| good	2.359 \| good	0.457 \| good
2025-07-22T23:00:00.000Z	73 \| moderate	21.225 \| fine	93.256 \| fine	53.254 \| good	0.6 \| good	2.011 \| good	0.518 \| good
2025-07-23T00:00:00.000Z	71 \| moderate	20.364 \| fine	89.378 \| fine	52.384 \| good	0.948 \| good	1.921 \| good	0.489 \| good
2025-07-23T01:00:00.000Z	71 \| moderate	20.26 \| fine	88.858 \| fine	52.562 \| good	0.652 \| good	2.396 \| good	0.478 \| good
2025-07-23T02:00:00.000Z	71 \| moderate	20.136 \| fine	89.08 \| fine	51.881 \| good	0.515 \| good	4.798 \| good	0.496 \| good
2025-07-23T03:00:00.000Z	69 \| moderate	19.016 \| fine	83.43 \| fine	44.755 \| good	0.358 \| good	5.66 \| good	0.512 \| good
2025-07-23T03:00:00.000Z	69 \| moderate	19.016 \| fine	83.43 \| fine	44.755 \| good	0.358 \| good	5.66 \| good	0.512 \| good
2025-07-23T04:00:00.000Z	56 \| moderate	11.65 \| good	51.324 \| good	29.056 \| good	1.712 \| good	7.709 \| good	0.268 \| good
2025-07-23T05:00:00.000Z	58 \| moderate	12.62 \| fine	57.076 \| fine	25.583 \| good	1.661 \| good	7.212 \| good	0.266 \| good
2025-07-23T06:00:00.000Z	58 \| moderate	13.453 \| fine	60.808 \| fine	24.357 \| good	1.61 \| good	6.714 \| good	0.263 \| good
2025-07-23T07:00:00.000Z	58 \| moderate	12.526 \| fine	56.803 \| fine	23.908 \| good	1.587 \| good	6.664 \| good	0.263 \| good
2025-07-23T08:00:00.000Z	56 \| moderate	12.36 \| fine	55.069 \| fine	24.075 \| good	1.563 \| good	6.613 \| good	0.263 \| good
2025-07-23T09:00:00.000Z	60 \| moderate	13.553 \| fine	60.881 \| fine	22.618 \| good	1.54 \| good	6.562 \| good	0.263 \| good
2025-07-23T10:00:00.000Z	62 \| moderate	14.879 \| fine	66.817 \| fine	22.063 \| good	1.681 \| good	6.82 \| good	0.27 \| good
2025-07-23T11:00:00.000Z	60 \| moderate	14.033 \| fine	63.023 \| fine	24.396 \| good	1.822 \| good	7.078 \| good	0.278 \| good
2025-07-23T12:00:00.000Z	56 \| moderate	11.618 \| good	51.074 \| good	31.598 \| good	1.963 \| good	7.336 \| good	0.286 \| good
2025-07-23T13:00:00.000Z	56 \| moderate	11.839 \| good	52.245 \| good	36.047 \| good	2.655 \| good	6.516 \| good	0.29 \| good
2025-07-23T14:00:00.000Z	58 \| moderate	12.502 \| fine	56.717 \| fine	41.062 \| good	3.347 \| good	5.695 \| good	0.295 \| good
2025-07-23T15:00:00.000Z	60 \| moderate	14.021 \| fine	62.924 \| fine	42.358 \| good	4.039 \| good	4.875 \| good	0.3 \| good
2025-07-23T16:00:00.000Z	62 \| moderate	14.854 \| fine	66.889 \| fine	45.486 \| good	4.288 \| good	3.793 \| good	0.276 \| good
2025-07-23T17:00:00.000Z	62 \| moderate	15.3 \| fine	68.853 \| fine	50.963 \| good	4.538 \| good	2.711 \| good	0.252 \| good
2025-07-23T18:00:00.000Z	64 \| moderate	16 \| fine	70.977 \| fine	53.196 \| good	4.788 \| good	1.629 \| good	0.229 \| good
2025-07-23T19:00:00.000Z	66 \| moderate	16.63 \| fine	73.063 \| fine	53.319 \| good	4.029 \| good	1.616 \| good	0.217 \| good
2025-07-23T20:00:00.000Z	66 \| moderate	17.304 \| fine	76.881 \| fine	55.024 \| fine	3.27 \| good	1.602 \| good	0.206 \| good
2025-07-23T21:00:00.000Z	67 \| moderate	18.092 \| fine	80.718 \| fine	56.342 \| fine	2.511 \| good	1.589 \| good	0.195 \| good
2025-07-23T22:00:00.000Z	71 \| moderate	20.201 \| fine	88.858 \| fine	56.384 \| fine	2.229 \| good	2.733 \| good	0.201 \| good
2025-07-23T23:00:00.000Z	73 \| moderate	20.725 \| fine	91.065 \| fine	55.88 \| fine	1.947 \| good	3.877 \| good	0.208 \| good
2025-07-24T00:00:00.000Z	67 \| moderate	18.005 \| fine	79 \| fine	51.159 \| good	1.665 \| good	5.021 \| good	0.214 \| good
2025-07-24T01:00:00.000Z	62 \| moderate	15.447 \| fine	68.934 \| fine	41.261 \| good	1.58 \| good	5.556 \| good	0.216 \| good
2025-07-24T02:00:00.000Z	64 \| moderate	16.262 \| fine	72.742 \| fine	36.451 \| good	1.494 \| good	6.091 \| good	0.218 \| good
2025-07-24T03:00:00.000Z	66 \| moderate	17.178 \| fine	76.644 \| fine	35.786 \| good	1.408 \| good	6.626 \| good	0.22 \| good
2025-07-24T04:00:00.000Z	69 \| moderate	18.505 \| fine	81.041 \| fine	35.338 \| good	1.391 \| good	6.487 \| good	0.221 \| good
2025-07-24T05:00:00.000Z	71 \| moderate	19.539 \| fine	86.71 \| fine	32.414 \| good	1.374 \| good	6.349 \| good	0.223 \| good
2025-07-24T06:00:00.000Z	69 \| moderate	19.033 \| fine	84.644 \| fine	26.459 \| good	1.356 \| good	6.211 \| good	0.224 \| good
2025-07-24T07:00:00.000Z	69 \| moderate	19.35 \| fine	84.988 \| fine	25.84 \| good	1.761 \| good	5.88 \| good	0.223 \| good
2025-07-24T08:00:00.000Z	69 \| moderate	18.878 \| fine	82.988 \| fine	24.327 \| good	2.166 \| good	5.549 \| good	0.223 \| good
2025-07-24T09:00:00.000Z	69 \| moderate	19.215 \| fine	84.859 \| fine	23.022 \| good	2.572 \| good	5.219 \| good	0.222 \| good
2025-07-24T10:00:00.000Z	73 \| moderate	20.869 \| fine	92.583 \| fine	22.398 \| good	3.324 \| good	5.304 \| good	0.224 \| good
2025-07-24T11:00:00.000Z	69 \| moderate	19.147 \| fine	84.793 \| fine	20.659 \| good	4.076 \| good	5.39 \| good	0.226 \| good
2025-07-24T12:00:00.000Z	64 \| moderate	16.458 \| fine	73.043 \| fine	24.067 \| good	4.828 \| good	5.476 \| good	0.228 \| good
2025-07-24T13:00:00.000Z	62 \| moderate	15.059 \| fine	67.062 \| fine	28.237 \| good	4.975 \| good	4.872 \| good	0.231 \| good
2025-07-24T14:00:00.000Z	60 \| moderate	13.732 \| fine	61.247 \| fine	36.431 \| good	5.122 \| good	4.269 \| good	0.233 \| good
2025-07-24T15:00:00.000Z	58 \| moderate	12.779 \| fine	57.161 \| fine	42.575 \| good	5.269 \| good	3.666 \| good	0.235 \| good
2025-07-24T16:00:00.000Z	58 \| moderate	12.515 \| fine	56.646 \| fine	47.293 \| good	4.187 \| good	2.937 \| good	0.219 \| good
2025-07-24T17:00:00.000Z	56 \| moderate	11.83 \| good	52.014 \| good	49.343 \| good	3.105 \| good	2.209 \| good	0.203 \| good
2025-07-24T18:00:00.000Z	54 \| moderate	11.06 \| good	48.968 \| good	50.291 \| good	2.023 \| good	1.48 \| good	0.187 \| good
2025-07-24T19:00:00.000Z	54 \| moderate	10.903 \| good	48.004 \| good	52.547 \| good	1.727 \| good	1.483 \| good	0.181 \| good
2025-07-24T20:00:00.000Z	58 \| moderate	11.315 \| good	49.876 \| good	57.257 \| fine	1.431 \| good	1.487 \| good	0.175 \| good
2025-07-24T21:00:00.000Z	67 \| moderate	12.225 \| fine	54.817 \| good	59.666 \| fine	1.134 \| good	1.49 \| good	0.17 \| good
2025-07-24T22:00:00.000Z	61 \| moderate	11.767 \| good	51.854 \| good	58.023 \| fine	1.067 \| good	2.105 \| good	0.175 \| good
2025-07-24T23:00:00.000Z	58 \| moderate	11.097 \| good	48.962 \| good	57.39 \| fine	0.999 \| good	2.72 \| good	0.18 \| good
2025-07-25T00:00:00.000Z	90 \| moderate	6.793 \| good	7.986 \| good	67.402 \| fine	0.927 \| good	3.325 \| good	0.185 \| good
2025-07-25T01:00:00.000Z	41 \| good	6.917 \| good	30.833 \| good	43.743 \| good	0.966 \| good	4.245 \| good	0.192 \| good
2025-07-25T02:00:00.000Z	35 \| good	5.162 \| good	22.182 \| good	38.212 \| good	1 \| good	5.154 \| good	0.2 \| good
2025-07-25T03:00:00.000Z	38 \| good	6.967 \| good	31.075 \| good	37.826 \| good	1.034 \| good	6.063 \| good	0.207 \| good

Markham

Get reliable air quality data to drive your business

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

0.49ppm

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 10:00:00 on 2025-07-22.

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 03:00:00 on 2025-07-22.

What is the AQI in Markham, Illinois right now?

As of now, the AQI in Markham, Illinois is 69, 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 19.016 μg/m³.

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

The PM₁₀ concentration in Markham, Illinois is 83.43 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 0.512 ppm.

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

Currently, Markham, Illinois has a sulfur dioxide (SO₂) concentration of 0.358 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 44.755 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 5.66 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-21T04:00:00.000Z	49 \| good	8.729 \| good	39.139 \| good	32.968 \| good	0.228 \| good	3.112 \| good	0.255 \| good
2025-07-21T05:00:00.000Z	64 \| moderate	16.197 \| fine	71.595 \| fine	32.965 \| good	0.316 \| good	2.665 \| good	0.272 \| good
2025-07-21T06:00:00.000Z	66 \| moderate	16.691 \| fine	73.935 \| fine	33.045 \| good	0.45 \| good	3.444 \| good	0.253 \| good
2025-07-21T07:00:00.000Z	86 \| moderate	28.262 \| fine	123.282 \| fine	32.005 \| good	0.665 \| good	1.814 \| good	0.236 \| good
2025-07-21T08:00:00.000Z	88 \| moderate	28.626 \| fine	124.669 \| fine	28.437 \| good	0.304 \| good	3.268 \| good	0.203 \| good
2025-07-21T09:00:00.000Z	92 \| moderate	31.427 \| fine	137.146 \| fine	24.256 \| good	0.226 \| good	3.956 \| good	0.217 \| good
2025-07-21T10:00:00.000Z	92 \| moderate	30.904 \| fine	135.804 \| fine	22.495 \| good	0.299 \| good	4.916 \| good	0.217 \| good
2025-07-21T11:00:00.000Z	86 \| moderate	27.51 \| fine	121.405 \| fine	18.7 \| good	0.827 \| good	4.37 \| good	0.182 \| good
2025-07-21T12:00:00.000Z	84 \| moderate	27.267 \| fine	120.365 \| fine	18.251 \| good	1.113 \| good	6.08 \| good	0.182 \| good
2025-07-21T13:00:00.000Z	62 \| moderate	15.024 \| fine	66.776 \| fine	18.686 \| good	1.107 \| good	8.001 \| good	0.179 \| good
2025-07-21T14:00:00.000Z	56 \| moderate	11.612 \| good	52.378 \| good	21.772 \| good	0.683 \| good	4.571 \| good	0.16 \| good
2025-07-21T15:00:00.000Z	54 \| moderate	11.456 \| good	51.598 \| good	23.611 \| good	4.011 \| good	4 \| good	0.16 \| good
2025-07-21T16:00:00.000Z	52 \| moderate	10.354 \| good	45.816 \| good	25.407 \| good	4.264 \| good	2.239 \| good	0.146 \| good
2025-07-21T17:00:00.000Z	54 \| moderate	10.813 \| good	48.654 \| good	31.085 \| good	1.58 \| good	1.369 \| good	0.132 \| good
2025-07-21T18:00:00.000Z	60 \| moderate	13.519 \| fine	60.515 \| fine	36.437 \| good	1.365 \| good	1.585 \| good	0.172 \| good
2025-07-21T19:00:00.000Z	60 \| moderate	13.725 \| fine	61.382 \| fine	45.358 \| good	2.035 \| good	1.645 \| good	0.173 \| good
2025-07-21T20:00:00.000Z	62 \| moderate	14.753 \| fine	66.643 \| fine	50.552 \| good	1.134 \| good	1.209 \| good	0.194 \| good
2025-07-21T21:00:00.000Z	64 \| moderate	15.736 \| fine	69.779 \| fine	54.258 \| good	3.346 \| good	1.237 \| good	0.198 \| good
2025-07-21T22:00:00.000Z	67 \| moderate	17.623 \| fine	78.1 \| fine	54.157 \| good	3.529 \| good	1.163 \| good	0.228 \| good
2025-07-21T23:00:00.000Z	75 \| moderate	22.074 \| fine	96.524 \| fine	53.804 \| good	1.985 \| good	0.984 \| good	0.236 \| good
2025-07-22T00:00:00.000Z	77 \| moderate	23.307 \| fine	102.069 \| fine	49.347 \| good	1.745 \| good	2.26 \| good	0.27 \| good
2025-07-22T01:00:00.000Z	79 \| moderate	23.517 \| fine	102.978 \| fine	47.708 \| good	2.902 \| good	2.796 \| good	0.287 \| good
2025-07-22T02:00:00.000Z	81 \| moderate	25.056 \| fine	109.151 \| fine	45.997 \| good	2.32 \| good	2.561 \| good	0.265 \| good
2025-07-22T03:00:00.000Z	58 \| moderate	13.382 \| fine	60.36 \| fine	25.038 \| good	1.117 \| good	8.834 \| good	0.297 \| good
2025-07-22T04:00:00.000Z	86 \| moderate	28.095 \| fine	122.565 \| fine	41.076 \| good	0.322 \| good	7.122 \| good	0.218 \| good
2025-07-22T05:00:00.000Z	90 \| moderate	29.917 \| fine	130.062 \| fine	40.06 \| good	0.413 \| good	8.689 \| good	0.18 \| good
2025-07-22T06:00:00.000Z	90 \| moderate	29.917 \| fine	130.062 \| fine	37.639 \| good	1.141 \| good	10.432 \| good	0.181 \| good
2025-07-22T07:00:00.000Z	92 \| moderate	30.98 \| fine	135.024 \| fine	30.257 \| good	0.861 \| good	10.057 \| good	0.152 \| good
2025-07-22T08:00:00.000Z	92 \| moderate	30.874 \| fine	134.312 \| fine	25.379 \| good	0.45 \| good	14.072 \| good	0.152 \| good
2025-07-22T09:00:00.000Z	92 \| moderate	31.071 \| fine	135.131 \| fine	20.058 \| good	0.276 \| good	12.619 \| good	0.14 \| good
2025-07-22T10:00:00.000Z	92 \| moderate	30.539 \| fine	132.04 \| fine	16.231 \| good	0.315 \| good	10.787 \| good	0.152 \| good
2025-07-22T11:00:00.000Z	90 \| moderate	30.051 \| fine	130.8 \| fine	17.867 \| good	0.538 \| good	8.472 \| good	0.206 \| good
2025-07-22T12:00:00.000Z	90 \| moderate	29.991 \| fine	130.627 \| fine	17.498 \| good	0.532 \| good	8.265 \| good	0.233 \| good
2025-07-22T13:00:00.000Z	88 \| moderate	29.239 \| fine	127.265 \| fine	21.487 \| good	0.275 \| good	6.948 \| good	0.206 \| good
2025-07-22T14:00:00.000Z	88 \| moderate	29.213 \| fine	127.092 \| fine	23.003 \| good	0.516 \| good	4.414 \| good	0.213 \| good
2025-07-22T15:00:00.000Z	88 \| moderate	29.024 \| fine	126.457 \| fine	26.338 \| good	0.544 \| good	4.73 \| good	0.244 \| good
2025-07-22T16:00:00.000Z	88 \| moderate	28.958 \| fine	125.332 \| fine	28.552 \| good	1.253 \| good	3.49 \| good	0.23 \| good
2025-07-22T17:00:00.000Z	88 \| moderate	28.958 \| fine	125.332 \| fine	41.242 \| good	0.919 \| good	2.002 \| good	0.23 \| good
2025-07-22T18:00:00.000Z	86 \| moderate	28.192 \| fine	122.569 \| fine	45.63 \| good	0.918 \| good	1.992 \| good	0.23 \| good
2025-07-22T19:00:00.000Z	86 \| moderate	27.965 \| fine	121.815 \| fine	48.784 \| good	0.684 \| good	2.019 \| good	0.246 \| good
2025-07-22T20:00:00.000Z	81 \| moderate	25.49 \| fine	111.466 \| fine	50.037 \| good	0.514 \| good	1.631 \| good	0.273 \| good
2025-07-22T21:00:00.000Z	81 \| moderate	25.386 \| fine	110.946 \| fine	50.53 \| good	0.414 \| good	2.202 \| good	0.366 \| good
2025-07-22T22:00:00.000Z	75 \| moderate	22.135 \| fine	97.18 \| fine	51.731 \| good	0.615 \| good	2.359 \| good	0.457 \| good
2025-07-22T23:00:00.000Z	73 \| moderate	21.225 \| fine	93.256 \| fine	53.254 \| good	0.6 \| good	2.011 \| good	0.518 \| good
2025-07-23T00:00:00.000Z	71 \| moderate	20.364 \| fine	89.378 \| fine	52.384 \| good	0.948 \| good	1.921 \| good	0.489 \| good
2025-07-23T01:00:00.000Z	71 \| moderate	20.26 \| fine	88.858 \| fine	52.562 \| good	0.652 \| good	2.396 \| good	0.478 \| good
2025-07-23T02:00:00.000Z	71 \| moderate	20.136 \| fine	89.08 \| fine	51.881 \| good	0.515 \| good	4.798 \| good	0.496 \| good
2025-07-23T03:00:00.000Z	69 \| moderate	19.016 \| fine	83.43 \| fine	44.755 \| good	0.358 \| good	5.66 \| good	0.512 \| good
2025-07-23T03:00:00.000Z	69 \| moderate	19.016 \| fine	83.43 \| fine	44.755 \| good	0.358 \| good	5.66 \| good	0.512 \| good
2025-07-23T04:00:00.000Z	56 \| moderate	11.65 \| good	51.324 \| good	29.056 \| good	1.712 \| good	7.709 \| good	0.268 \| good
2025-07-23T05:00:00.000Z	58 \| moderate	12.62 \| fine	57.076 \| fine	25.583 \| good	1.661 \| good	7.212 \| good	0.266 \| good
2025-07-23T06:00:00.000Z	58 \| moderate	13.453 \| fine	60.808 \| fine	24.357 \| good	1.61 \| good	6.714 \| good	0.263 \| good
2025-07-23T07:00:00.000Z	58 \| moderate	12.526 \| fine	56.803 \| fine	23.908 \| good	1.587 \| good	6.664 \| good	0.263 \| good
2025-07-23T08:00:00.000Z	56 \| moderate	12.36 \| fine	55.069 \| fine	24.075 \| good	1.563 \| good	6.613 \| good	0.263 \| good
2025-07-23T09:00:00.000Z	60 \| moderate	13.553 \| fine	60.881 \| fine	22.618 \| good	1.54 \| good	6.562 \| good	0.263 \| good
2025-07-23T10:00:00.000Z	62 \| moderate	14.879 \| fine	66.817 \| fine	22.063 \| good	1.681 \| good	6.82 \| good	0.27 \| good
2025-07-23T11:00:00.000Z	60 \| moderate	14.033 \| fine	63.023 \| fine	24.396 \| good	1.822 \| good	7.078 \| good	0.278 \| good
2025-07-23T12:00:00.000Z	56 \| moderate	11.618 \| good	51.074 \| good	31.598 \| good	1.963 \| good	7.336 \| good	0.286 \| good
2025-07-23T13:00:00.000Z	56 \| moderate	11.839 \| good	52.245 \| good	36.047 \| good	2.655 \| good	6.516 \| good	0.29 \| good
2025-07-23T14:00:00.000Z	58 \| moderate	12.502 \| fine	56.717 \| fine	41.062 \| good	3.347 \| good	5.695 \| good	0.295 \| good
2025-07-23T15:00:00.000Z	60 \| moderate	14.021 \| fine	62.924 \| fine	42.358 \| good	4.039 \| good	4.875 \| good	0.3 \| good
2025-07-23T16:00:00.000Z	62 \| moderate	14.854 \| fine	66.889 \| fine	45.486 \| good	4.288 \| good	3.793 \| good	0.276 \| good
2025-07-23T17:00:00.000Z	62 \| moderate	15.3 \| fine	68.853 \| fine	50.963 \| good	4.538 \| good	2.711 \| good	0.252 \| good
2025-07-23T18:00:00.000Z	64 \| moderate	16 \| fine	70.977 \| fine	53.196 \| good	4.788 \| good	1.629 \| good	0.229 \| good
2025-07-23T19:00:00.000Z	66 \| moderate	16.63 \| fine	73.063 \| fine	53.319 \| good	4.029 \| good	1.616 \| good	0.217 \| good
2025-07-23T20:00:00.000Z	66 \| moderate	17.304 \| fine	76.881 \| fine	55.024 \| fine	3.27 \| good	1.602 \| good	0.206 \| good
2025-07-23T21:00:00.000Z	67 \| moderate	18.092 \| fine	80.718 \| fine	56.342 \| fine	2.511 \| good	1.589 \| good	0.195 \| good
2025-07-23T22:00:00.000Z	71 \| moderate	20.201 \| fine	88.858 \| fine	56.384 \| fine	2.229 \| good	2.733 \| good	0.201 \| good
2025-07-23T23:00:00.000Z	73 \| moderate	20.725 \| fine	91.065 \| fine	55.88 \| fine	1.947 \| good	3.877 \| good	0.208 \| good
2025-07-24T00:00:00.000Z	67 \| moderate	18.005 \| fine	79 \| fine	51.159 \| good	1.665 \| good	5.021 \| good	0.214 \| good
2025-07-24T01:00:00.000Z	62 \| moderate	15.447 \| fine	68.934 \| fine	41.261 \| good	1.58 \| good	5.556 \| good	0.216 \| good
2025-07-24T02:00:00.000Z	64 \| moderate	16.262 \| fine	72.742 \| fine	36.451 \| good	1.494 \| good	6.091 \| good	0.218 \| good
2025-07-24T03:00:00.000Z	66 \| moderate	17.178 \| fine	76.644 \| fine	35.786 \| good	1.408 \| good	6.626 \| good	0.22 \| good
2025-07-24T04:00:00.000Z	69 \| moderate	18.505 \| fine	81.041 \| fine	35.338 \| good	1.391 \| good	6.487 \| good	0.221 \| good
2025-07-24T05:00:00.000Z	71 \| moderate	19.539 \| fine	86.71 \| fine	32.414 \| good	1.374 \| good	6.349 \| good	0.223 \| good
2025-07-24T06:00:00.000Z	69 \| moderate	19.033 \| fine	84.644 \| fine	26.459 \| good	1.356 \| good	6.211 \| good	0.224 \| good
2025-07-24T07:00:00.000Z	69 \| moderate	19.35 \| fine	84.988 \| fine	25.84 \| good	1.761 \| good	5.88 \| good	0.223 \| good
2025-07-24T08:00:00.000Z	69 \| moderate	18.878 \| fine	82.988 \| fine	24.327 \| good	2.166 \| good	5.549 \| good	0.223 \| good
2025-07-24T09:00:00.000Z	69 \| moderate	19.215 \| fine	84.859 \| fine	23.022 \| good	2.572 \| good	5.219 \| good	0.222 \| good
2025-07-24T10:00:00.000Z	73 \| moderate	20.869 \| fine	92.583 \| fine	22.398 \| good	3.324 \| good	5.304 \| good	0.224 \| good
2025-07-24T11:00:00.000Z	69 \| moderate	19.147 \| fine	84.793 \| fine	20.659 \| good	4.076 \| good	5.39 \| good	0.226 \| good
2025-07-24T12:00:00.000Z	64 \| moderate	16.458 \| fine	73.043 \| fine	24.067 \| good	4.828 \| good	5.476 \| good	0.228 \| good
2025-07-24T13:00:00.000Z	62 \| moderate	15.059 \| fine	67.062 \| fine	28.237 \| good	4.975 \| good	4.872 \| good	0.231 \| good
2025-07-24T14:00:00.000Z	60 \| moderate	13.732 \| fine	61.247 \| fine	36.431 \| good	5.122 \| good	4.269 \| good	0.233 \| good
2025-07-24T15:00:00.000Z	58 \| moderate	12.779 \| fine	57.161 \| fine	42.575 \| good	5.269 \| good	3.666 \| good	0.235 \| good
2025-07-24T16:00:00.000Z	58 \| moderate	12.515 \| fine	56.646 \| fine	47.293 \| good	4.187 \| good	2.937 \| good	0.219 \| good
2025-07-24T17:00:00.000Z	56 \| moderate	11.83 \| good	52.014 \| good	49.343 \| good	3.105 \| good	2.209 \| good	0.203 \| good
2025-07-24T18:00:00.000Z	54 \| moderate	11.06 \| good	48.968 \| good	50.291 \| good	2.023 \| good	1.48 \| good	0.187 \| good
2025-07-24T19:00:00.000Z	54 \| moderate	10.903 \| good	48.004 \| good	52.547 \| good	1.727 \| good	1.483 \| good	0.181 \| good
2025-07-24T20:00:00.000Z	58 \| moderate	11.315 \| good	49.876 \| good	57.257 \| fine	1.431 \| good	1.487 \| good	0.175 \| good
2025-07-24T21:00:00.000Z	67 \| moderate	12.225 \| fine	54.817 \| good	59.666 \| fine	1.134 \| good	1.49 \| good	0.17 \| good
2025-07-24T22:00:00.000Z	61 \| moderate	11.767 \| good	51.854 \| good	58.023 \| fine	1.067 \| good	2.105 \| good	0.175 \| good
2025-07-24T23:00:00.000Z	58 \| moderate	11.097 \| good	48.962 \| good	57.39 \| fine	0.999 \| good	2.72 \| good	0.18 \| good
2025-07-25T00:00:00.000Z	90 \| moderate	6.793 \| good	7.986 \| good	67.402 \| fine	0.927 \| good	3.325 \| good	0.185 \| good
2025-07-25T01:00:00.000Z	41 \| good	6.917 \| good	30.833 \| good	43.743 \| good	0.966 \| good	4.245 \| good	0.192 \| good
2025-07-25T02:00:00.000Z	35 \| good	5.162 \| good	22.182 \| good	38.212 \| good	1 \| good	5.154 \| good	0.2 \| good
2025-07-25T03:00:00.000Z	38 \| good	6.967 \| good	31.075 \| good	37.826 \| good	1.034 \| good	6.063 \| good	0.207 \| 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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What is the sulfur dioxide (SO2) level in Markham, Illinois at the moment?

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

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