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

Currently, Westchester, Illinois has a sulfur dioxide (SO2) concentration of 2.054 ppb.

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

The current ozone (O3) level in Westchester, Illinois at the moment is 33.213 ppm.

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

Nitrogen dioxide (NO2) level in Westchester, Illinois at the moment is 10.858 ppb.

Live air quality index in Westchester, Illinois today

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

PM2.5 levels in Westchester, Illinois are currently 14.357 μg/m3.

Q: What is the PM10 level in Westchester, Illinois at the moment?

The PM10 concentration in Westchester, Illinois is 64.671 μg/m3 at the moment.

Stay updated with real-time air quality in Westchester, 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

Westchester, Illinois

Last updated: ... (Local time)

Major air pollutants in Westchester, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

14.36 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

64.67 μg/m³

155

255

425

605+

Ozone (O₃)

33.21 ppb

201

201+

Sulfur Dioxide (SO₂)

2.05 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.86 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Westchester, Illinois

Scroll To Air Quality Map

Track live Westchester, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	60 \| moderate	13.586 \| fine	59.641 \| fine	30.672 \| good	6.751 \| good	8.641 \| good	0.215 \| good
2026-10-20T23:00:00.000Z	56 \| moderate	11.622 \| good	50.124 \| good	35.538 \| good	3.266 \| good	25.073 \| good	0.229 \| good
2026-10-21T00:00:00.000Z	54 \| moderate	10.586 \| good	46.443 \| good	31.943 \| good	0.99 \| good	24.525 \| good	0.27 \| good
2026-10-21T01:00:00.000Z	56 \| moderate	12.452 \| fine	56.069 \| fine	29.956 \| good	0.751 \| good	30.173 \| good	0.285 \| good
2026-10-21T02:00:00.000Z	60 \| moderate	14.237 \| fine	61.521 \| fine	23.358 \| good	0.641 \| good	29.525 \| good	0.3 \| good
2026-10-21T03:00:00.000Z	73 \| moderate	20.604 \| fine	90.491 \| fine	0.527 \| good	3.17 \| good	42.488 \| good	0.324 \| good
2026-10-21T04:00:00.000Z	66 \| moderate	16.949 \| fine	73.432 \| fine	10.794 \| good	0.596 \| good	27.997 \| good	0.31 \| good
2026-10-21T05:00:00.000Z	69 \| moderate	19.097 \| fine	81.349 \| fine	8.664 \| good	1.426 \| good	24.323 \| good	0.29 \| good
2026-10-21T06:00:00.000Z	71 \| moderate	20.154 \| fine	87.034 \| fine	4.198 \| good	1.853 \| good	22.529 \| good	0.277 \| good
2026-10-21T07:00:00.000Z	73 \| moderate	20.533 \| fine	89.061 \| fine	3.317 \| good	1.597 \| good	18.768 \| good	0.292 \| good
2026-10-21T08:00:00.000Z	73 \| moderate	20.841 \| fine	77.371 \| fine	4.265 \| good	0.917 \| good	19.725 \| good	0.259 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	21.285 \| fine	75.709 \| fine	8.735 \| good	0.887 \| good	19.691 \| good	0.244 \| good
2026-10-21T10:00:00.000Z	81 \| moderate	25.237 \| fine	95.485 \| fine	9.429 \| good	0.933 \| good	21.9 \| good	0.292 \| good
2026-10-21T11:00:00.000Z	81 \| moderate	25.125 \| fine	96.234 \| fine	8.214 \| good	0.996 \| good	23.608 \| good	0.358 \| good
2026-10-21T12:00:00.000Z	90 \| moderate	30.392 \| fine	127.197 \| fine	4.139 \| good	0.971 \| good	22.317 \| good	0.371 \| good
2026-10-21T13:00:00.000Z	90 \| moderate	29.58 \| fine	130.306 \| fine	2.304 \| good	1.004 \| good	18.063 \| good	0.371 \| good
2026-10-21T14:00:00.000Z	105 \| sensitive	36.6 \| moderate	155.99 \| moderate	3.168 \| good	1.168 \| good	24.148 \| good	0.476 \| good
2026-10-21T15:00:00.000Z	112 \| sensitive	38.214 \| moderate	178.308 \| moderate	5.037 \| good	1.673 \| good	23.583 \| good	0.407 \| good
2026-10-21T16:00:00.000Z	102 \| sensitive	35.713 \| moderate	154.662 \| fine	9.08 \| good	2.021 \| good	21.403 \| good	0.311 \| good
2026-10-21T17:00:00.000Z	81 \| moderate	24.81 \| fine	105.972 \| fine	12.05 \| good	1.867 \| good	19.874 \| good	0.261 \| good
2026-10-21T18:00:00.000Z	66 \| moderate	17.399 \| fine	78.498 \| fine	17.899 \| good	1.933 \| good	17.391 \| good	0.248 \| good
2026-10-21T19:00:00.000Z	66 \| moderate	17.302 \| fine	76.134 \| fine	25.104 \| good	1.255 \| good	16.487 \| good	0.248 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	10.597 \| good	47.19 \| good	31.315 \| good	1.273 \| good	11.789 \| good	0.248 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.561 \| good	42.32 \| good	35.575 \| good	1.404 \| good	12.732 \| good	0.248 \| good
2026-10-21T22:00:00.000Z	44 \| good	8.208 \| good	35.087 \| good	36.626 \| good	1.641 \| good	15.397 \| good	0.248 \| good
2026-10-21T23:00:00.000Z	49 \| good	8.655 \| good	38.202 \| good	37.953 \| good	2.14 \| good	24.473 \| good	0.263 \| good
2026-10-22T00:00:00.000Z	54 \| moderate	10.605 \| good	46.005 \| good	31.389 \| good	1.537 \| good	16.34 \| good	0.324 \| good
2026-10-22T01:00:00.000Z	60 \| moderate	13.643 \| fine	58.964 \| fine	24.969 \| good	1.106 \| good	18.46 \| good	0.365 \| good
2026-10-22T02:00:00.000Z	64 \| moderate	16.495 \| fine	72.555 \| fine	18.683 \| good	0.879 \| good	29.275 \| good	0.385 \| good
2026-10-22T03:00:00.000Z	44 \| good	7.962 \| good	34.931 \| good	8.834 \| good	3 \| good	42.724 \| good	0.519 \| good
2026-10-22T04:00:00.000Z	69 \| moderate	18.652 \| fine	77.814 \| fine	8.531 \| good	1.604 \| good	33.885 \| good	0.432 \| good
2026-10-22T05:00:00.000Z	75 \| moderate	22.341 \| fine	94.61 \| fine	4.379 \| good	1.296 \| good	31.739 \| good	0.397 \| good
2026-10-22T06:00:00.000Z	75 \| moderate	22.482 \| fine	98.432 \| fine	1.89 \| good	1.221 \| good	25.883 \| good	0.422 \| good
2026-10-22T07:00:00.000Z	77 \| moderate	22.583 \| fine	98.609 \| fine	2.851 \| good	1.226 \| good	24.671 \| good	0.422 \| good
2026-10-22T08:00:00.000Z	79 \| moderate	23.853 \| fine	93.622 \| fine	4.078 \| good	1.147 \| good	25.102 \| good	0.344 \| good
2026-10-22T09:00:00.000Z	77 \| moderate	23.458 \| fine	92.231 \| fine	2.154 \| good	1.206 \| good	22.992 \| good	0.329 \| good
2026-10-22T10:00:00.000Z	73 \| moderate	20.76 \| fine	78.857 \| fine	6.012 \| good	0.991 \| good	19.305 \| good	0.316 \| good
2026-10-22T11:00:00.000Z	71 \| moderate	20.4 \| fine	76.097 \| fine	7.513 \| good	1.009 \| good	18.824 \| good	0.437 \| good
2026-10-22T12:00:00.000Z	71 \| moderate	20.492 \| fine	88.057 \| fine	3.554 \| good	1.059 \| good	21.377 \| good	0.485 \| good
2026-10-22T13:00:00.000Z	71 \| moderate	20.251 \| fine	83.484 \| fine	2.163 \| good	1.248 \| good	21.222 \| good	0.441 \| good
2026-10-22T14:00:00.000Z	75 \| moderate	21.561 \| fine	93.513 \| fine	3.939 \| good	1.397 \| good	19.843 \| good	0.488 \| good
2026-10-22T15:00:00.000Z	77 \| moderate	22.594 \| fine	97.537 \| fine	4.872 \| good	1.664 \| good	23.936 \| good	0.5 \| good
2026-10-22T16:00:00.000Z	73 \| moderate	20.839 \| fine	91.382 \| fine	9.894 \| good	1.87 \| good	28.654 \| good	0.329 \| good
2026-10-22T17:00:00.000Z	73 \| moderate	20.761 \| fine	91.399 \| fine	16.08 \| good	2.203 \| good	24.348 \| good	0.29 \| good
2026-10-22T18:00:00.000Z	64 \| moderate	16.19 \| fine	72.338 \| fine	22.21 \| good	1.775 \| good	23.632 \| good	0.244 \| good
2026-10-22T19:00:00.000Z	62 \| moderate	15.462 \| fine	68.917 \| fine	28.55 \| good	2.757 \| good	18.157 \| good	0.215 \| good
2026-10-22T20:00:00.000Z	60 \| moderate	13.525 \| fine	60.817 \| fine	33.962 \| good	1.94 \| good	10.195 \| good	0.215 \| good
2026-10-22T21:00:00.000Z	60 \| moderate	14.357 \| fine	64.671 \| fine	33.213 \| good	2.054 \| good	10.858 \| good	0.213 \| good
2026-10-22T22:00:00.000Z	56 \| moderate	12.103 \| fine	54.473 \| good	36.86 \| good	1.893 \| good	24.773 \| good	0.28 \| good
2026-10-22T23:00:00.000Z	67 \| moderate	17.705 \| fine	78.835 \| fine	20.814 \| good	2.006 \| good	42.085 \| good	0.387 \| good
2026-10-23T00:00:00.000Z	69 \| moderate	19.485 \| fine	86.138 \| fine	13.038 \| good	2.269 \| good	48.891 \| good	0.466 \| good
2026-10-23T01:00:00.000Z	71 \| moderate	20.405 \| fine	89.492 \| fine	8.52 \| good	2.404 \| good	49.966 \| good	0.48 \| good
2026-10-23T02:00:00.000Z	71 \| moderate	19.656 \| fine	86.753 \| fine	2.435 \| good	2.555 \| good	50.751 \| good	0.473 \| good
2026-10-23T03:00:00.000Z	69 \| moderate	18.773 \| fine	82.729 \| fine	1.413 \| good	2.723 \| good	50.52 \| good	0.47 \| good
2026-10-23T04:00:00.000Z	66 \| moderate	16.797 \| fine	74.763 \| fine	1.942 \| good	2.849 \| good	49.763 \| good	0.473 \| good
2026-10-23T05:00:00.000Z	64 \| moderate	16.048 \| fine	71.504 \| fine	2.753 \| good	2.816 \| good	48.615 \| good	0.471 \| good
2026-10-23T06:00:00.000Z	67 \| moderate	17.688 \| fine	78.296 \| fine	3.188 \| good	2.75 \| good	47.171 \| good	0.451 \| good
2026-10-23T07:00:00.000Z	73 \| moderate	21.414 \| fine	94.087 \| fine	2.759 \| good	2.804 \| good	45.53 \| good	0.43 \| good
2026-10-23T08:00:00.000Z	79 \| moderate	24.367 \| fine	105.835 \| fine	2.057 \| good	2.931 \| good	43.719 \| good	0.414 \| good
2026-10-23T09:00:00.000Z	81 \| moderate	24.811 \| fine	108.183 \| fine	1.723 \| good	3.084 \| good	41.65 \| good	0.399 \| good
2026-10-23T10:00:00.000Z	82 \| moderate	25.667 \| fine	112.069 \| fine	1.59 \| good	3.293 \| good	39.587 \| good	0.386 \| good
2026-10-23T11:00:00.000Z	84 \| moderate	26.685 \| fine	116.006 \| fine	1.057 \| good	3.459 \| good	37.922 \| good	0.381 \| good
2026-10-23T12:00:00.000Z	82 \| moderate	26.41 \| fine	115.37 \| fine	0.588 \| good	3.677 \| good	37.085 \| good	0.394 \| good
2026-10-23T13:00:00.000Z	84 \| moderate	26.611 \| fine	115.997 \| fine	3.207 \| good	3.838 \| good	33.637 \| good	0.435 \| good
2026-10-23T14:00:00.000Z	81 \| moderate	25.128 \| fine	109.577 \| fine	12.31 \| good	3.4 \| good	28.554 \| good	0.425 \| good
2026-10-23T15:00:00.000Z	75 \| moderate	21.957 \| fine	96.465 \| fine	21.953 \| good	3.066 \| good	25.518 \| good	0.39 \| good
2026-10-23T16:00:00.000Z	69 \| moderate	18.833 \| fine	83.115 \| fine	31.874 \| good	2.639 \| good	21.38 \| good	0.318 \| good
2026-10-23T17:00:00.000Z	64 \| moderate	15.827 \| fine	70.88 \| fine	40.248 \| good	2.287 \| good	16.46 \| good	0.262 \| good
2026-10-23T18:00:00.000Z	60 \| moderate	14.368 \| fine	64.342 \| fine	47.526 \| good	2.251 \| good	11.077 \| good	0.224 \| good
2026-10-23T19:00:00.000Z	58 \| moderate	13.251 \| fine	59.784 \| fine	52.154 \| good	2.221 \| good	8.061 \| good	0.209 \| good
2026-10-23T20:00:00.000Z	56 \| moderate	11.709 \| good	51.675 \| good	53.525 \| good	2.145 \| good	7.043 \| good	0.203 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	10.191 \| good	45.393 \| good	51.257 \| good	2.126 \| good	7.534 \| good	0.203 \| good
2026-10-23T22:00:00.000Z	56 \| moderate	11.62 \| good	51.797 \| good	33.767 \| good	2.047 \| good	14.194 \| good	0.232 \| good
2026-10-23T23:00:00.000Z	62 \| moderate	15.248 \| fine	68.106 \| fine	18.941 \| good	2.089 \| good	26.316 \| good	0.283 \| good
2026-10-24T00:00:00.000Z	66 \| moderate	17.123 \| fine	76.012 \| fine	12.669 \| good	2.207 \| good	34.879 \| good	0.307 \| good
2026-10-24T01:00:00.000Z	66 \| moderate	16.873 \| fine	75.068 \| fine	8.205 \| good	2.291 \| good	37.327 \| good	0.296 \| good
2026-10-24T02:00:00.000Z	66 \| moderate	17.177 \| fine	75.856 \| fine	7.946 \| good	2.319 \| good	37.878 \| good	0.285 \| good
2026-10-24T03:00:00.000Z	64 \| moderate	16.414 \| fine	72.963 \| fine	14.914 \| good	2.307 \| good	36.605 \| good	0.275 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	14.708 \| fine	66.21 \| fine	17.279 \| good	2.253 \| good	33.031 \| good	0.266 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.213 \| fine	59.847 \| fine	18.088 \| good	2.129 \| good	26.206 \| good	0.256 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	13.524 \| fine	60.645 \| fine	16.986 \| good	2.006 \| good	20.083 \| good	0.245 \| good
2026-10-24T07:00:00.000Z	60 \| moderate	13.622 \| fine	61.125 \| fine	15.377 \| good	1.863 \| good	16.103 \| good	0.237 \| good
2026-10-24T08:00:00.000Z	60 \| moderate	13.549 \| fine	60.838 \| fine	14.658 \| good	1.743 \| good	13.659 \| good	0.232 \| good
2026-10-24T09:00:00.000Z	60 \| moderate	14.001 \| fine	62.838 \| fine	13.101 \| good	1.658 \| good	12.451 \| good	0.231 \| good
2026-10-24T10:00:00.000Z	58 \| moderate	13.331 \| fine	60.308 \| fine	13.562 \| good	1.613 \| good	12.281 \| good	0.232 \| good
2026-10-24T11:00:00.000Z	64 \| moderate	15.582 \| fine	69.233 \| fine	11.931 \| good	1.615 \| good	13.288 \| good	0.235 \| good
2026-10-24T12:00:00.000Z	67 \| moderate	17.816 \| fine	78.534 \| fine	10.662 \| good	1.686 \| good	17.808 \| good	0.246 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	19.706 \| fine	87.379 \| fine	14.892 \| good	1.765 \| good	19.313 \| good	0.261 \| good
2026-10-24T14:00:00.000Z	73 \| moderate	20.781 \| fine	91.3 \| fine	24.653 \| good	1.789 \| good	17.978 \| good	0.277 \| good
2026-10-24T15:00:00.000Z	67 \| moderate	18.089 \| fine	80.476 \| fine	33.099 \| good	1.845 \| good	16.11 \| good	0.27 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	15.479 \| fine	69.443 \| fine	40.171 \| good	1.876 \| good	14.782 \| good	0.261 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	13.157 \| fine	59.087 \| fine	44.601 \| good	1.909 \| good	13.71 \| good	0.253 \| good
2026-10-24T18:00:00.000Z	58 \| moderate	12.745 \| fine	56.984 \| fine	47.329 \| good	1.919 \| good	11.912 \| good	0.24 \| good
2026-10-24T19:00:00.000Z	56 \| moderate	12.34 \| fine	55.816 \| fine	50.618 \| good	1.87 \| good	9.918 \| good	0.225 \| good
2026-10-24T20:00:00.000Z	54 \| moderate	11.148 \| good	49.388 \| good	51.189 \| good	1.845 \| good	9.19 \| good	0.216 \| good
2026-10-24T21:00:00.000Z	54 \| moderate	10.558 \| good	46.688 \| good	49.585 \| good	1.827 \| good	10.251 \| good	0.215 \| good

Westchester

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

0.21ppm

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 Westchester, Illinois?

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

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

In the past 24 hours, the air quality in Westchester, Illinois was at its worst at 08:00:00 on 2026-10-22.

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

In the last 24 hours, the best air quality in Westchester, Illinois was observed at 03:00:00 on 2026-10-22.

What is the AQI in Westchester, Illinois right now?

As of now, the AQI in Westchester, Illinois is 60, indicating Moderate conditions.

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

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

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

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

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

PM_2.5 levels in Westchester, Illinois are currently 14.357 μg/m³.

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

The PM₁₀ concentration in Westchester, Illinois is 64.671 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Westchester, Illinois is 0.213 ppm.

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

Currently, Westchester, Illinois has a sulfur dioxide (SO₂) concentration of 2.054 ppb.

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

The current ozone (O₃) level in Westchester, Illinois at the moment is 33.213 ppm.

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

Nitrogen dioxide (NO₂) level in Westchester, Illinois at the moment is 10.858 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	60 \| moderate	13.586 \| fine	59.641 \| fine	30.672 \| good	6.751 \| good	8.641 \| good	0.215 \| good
2026-10-20T23:00:00.000Z	56 \| moderate	11.622 \| good	50.124 \| good	35.538 \| good	3.266 \| good	25.073 \| good	0.229 \| good
2026-10-21T00:00:00.000Z	54 \| moderate	10.586 \| good	46.443 \| good	31.943 \| good	0.99 \| good	24.525 \| good	0.27 \| good
2026-10-21T01:00:00.000Z	56 \| moderate	12.452 \| fine	56.069 \| fine	29.956 \| good	0.751 \| good	30.173 \| good	0.285 \| good
2026-10-21T02:00:00.000Z	60 \| moderate	14.237 \| fine	61.521 \| fine	23.358 \| good	0.641 \| good	29.525 \| good	0.3 \| good
2026-10-21T03:00:00.000Z	73 \| moderate	20.604 \| fine	90.491 \| fine	0.527 \| good	3.17 \| good	42.488 \| good	0.324 \| good
2026-10-21T04:00:00.000Z	66 \| moderate	16.949 \| fine	73.432 \| fine	10.794 \| good	0.596 \| good	27.997 \| good	0.31 \| good
2026-10-21T05:00:00.000Z	69 \| moderate	19.097 \| fine	81.349 \| fine	8.664 \| good	1.426 \| good	24.323 \| good	0.29 \| good
2026-10-21T06:00:00.000Z	71 \| moderate	20.154 \| fine	87.034 \| fine	4.198 \| good	1.853 \| good	22.529 \| good	0.277 \| good
2026-10-21T07:00:00.000Z	73 \| moderate	20.533 \| fine	89.061 \| fine	3.317 \| good	1.597 \| good	18.768 \| good	0.292 \| good
2026-10-21T08:00:00.000Z	73 \| moderate	20.841 \| fine	77.371 \| fine	4.265 \| good	0.917 \| good	19.725 \| good	0.259 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	21.285 \| fine	75.709 \| fine	8.735 \| good	0.887 \| good	19.691 \| good	0.244 \| good
2026-10-21T10:00:00.000Z	81 \| moderate	25.237 \| fine	95.485 \| fine	9.429 \| good	0.933 \| good	21.9 \| good	0.292 \| good
2026-10-21T11:00:00.000Z	81 \| moderate	25.125 \| fine	96.234 \| fine	8.214 \| good	0.996 \| good	23.608 \| good	0.358 \| good
2026-10-21T12:00:00.000Z	90 \| moderate	30.392 \| fine	127.197 \| fine	4.139 \| good	0.971 \| good	22.317 \| good	0.371 \| good
2026-10-21T13:00:00.000Z	90 \| moderate	29.58 \| fine	130.306 \| fine	2.304 \| good	1.004 \| good	18.063 \| good	0.371 \| good
2026-10-21T14:00:00.000Z	105 \| sensitive	36.6 \| moderate	155.99 \| moderate	3.168 \| good	1.168 \| good	24.148 \| good	0.476 \| good
2026-10-21T15:00:00.000Z	112 \| sensitive	38.214 \| moderate	178.308 \| moderate	5.037 \| good	1.673 \| good	23.583 \| good	0.407 \| good
2026-10-21T16:00:00.000Z	102 \| sensitive	35.713 \| moderate	154.662 \| fine	9.08 \| good	2.021 \| good	21.403 \| good	0.311 \| good
2026-10-21T17:00:00.000Z	81 \| moderate	24.81 \| fine	105.972 \| fine	12.05 \| good	1.867 \| good	19.874 \| good	0.261 \| good
2026-10-21T18:00:00.000Z	66 \| moderate	17.399 \| fine	78.498 \| fine	17.899 \| good	1.933 \| good	17.391 \| good	0.248 \| good
2026-10-21T19:00:00.000Z	66 \| moderate	17.302 \| fine	76.134 \| fine	25.104 \| good	1.255 \| good	16.487 \| good	0.248 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	10.597 \| good	47.19 \| good	31.315 \| good	1.273 \| good	11.789 \| good	0.248 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.561 \| good	42.32 \| good	35.575 \| good	1.404 \| good	12.732 \| good	0.248 \| good
2026-10-21T22:00:00.000Z	44 \| good	8.208 \| good	35.087 \| good	36.626 \| good	1.641 \| good	15.397 \| good	0.248 \| good
2026-10-21T23:00:00.000Z	49 \| good	8.655 \| good	38.202 \| good	37.953 \| good	2.14 \| good	24.473 \| good	0.263 \| good
2026-10-22T00:00:00.000Z	54 \| moderate	10.605 \| good	46.005 \| good	31.389 \| good	1.537 \| good	16.34 \| good	0.324 \| good
2026-10-22T01:00:00.000Z	60 \| moderate	13.643 \| fine	58.964 \| fine	24.969 \| good	1.106 \| good	18.46 \| good	0.365 \| good
2026-10-22T02:00:00.000Z	64 \| moderate	16.495 \| fine	72.555 \| fine	18.683 \| good	0.879 \| good	29.275 \| good	0.385 \| good
2026-10-22T03:00:00.000Z	44 \| good	7.962 \| good	34.931 \| good	8.834 \| good	3 \| good	42.724 \| good	0.519 \| good
2026-10-22T04:00:00.000Z	69 \| moderate	18.652 \| fine	77.814 \| fine	8.531 \| good	1.604 \| good	33.885 \| good	0.432 \| good
2026-10-22T05:00:00.000Z	75 \| moderate	22.341 \| fine	94.61 \| fine	4.379 \| good	1.296 \| good	31.739 \| good	0.397 \| good
2026-10-22T06:00:00.000Z	75 \| moderate	22.482 \| fine	98.432 \| fine	1.89 \| good	1.221 \| good	25.883 \| good	0.422 \| good
2026-10-22T07:00:00.000Z	77 \| moderate	22.583 \| fine	98.609 \| fine	2.851 \| good	1.226 \| good	24.671 \| good	0.422 \| good
2026-10-22T08:00:00.000Z	79 \| moderate	23.853 \| fine	93.622 \| fine	4.078 \| good	1.147 \| good	25.102 \| good	0.344 \| good
2026-10-22T09:00:00.000Z	77 \| moderate	23.458 \| fine	92.231 \| fine	2.154 \| good	1.206 \| good	22.992 \| good	0.329 \| good
2026-10-22T10:00:00.000Z	73 \| moderate	20.76 \| fine	78.857 \| fine	6.012 \| good	0.991 \| good	19.305 \| good	0.316 \| good
2026-10-22T11:00:00.000Z	71 \| moderate	20.4 \| fine	76.097 \| fine	7.513 \| good	1.009 \| good	18.824 \| good	0.437 \| good
2026-10-22T12:00:00.000Z	71 \| moderate	20.492 \| fine	88.057 \| fine	3.554 \| good	1.059 \| good	21.377 \| good	0.485 \| good
2026-10-22T13:00:00.000Z	71 \| moderate	20.251 \| fine	83.484 \| fine	2.163 \| good	1.248 \| good	21.222 \| good	0.441 \| good
2026-10-22T14:00:00.000Z	75 \| moderate	21.561 \| fine	93.513 \| fine	3.939 \| good	1.397 \| good	19.843 \| good	0.488 \| good
2026-10-22T15:00:00.000Z	77 \| moderate	22.594 \| fine	97.537 \| fine	4.872 \| good	1.664 \| good	23.936 \| good	0.5 \| good
2026-10-22T16:00:00.000Z	73 \| moderate	20.839 \| fine	91.382 \| fine	9.894 \| good	1.87 \| good	28.654 \| good	0.329 \| good
2026-10-22T17:00:00.000Z	73 \| moderate	20.761 \| fine	91.399 \| fine	16.08 \| good	2.203 \| good	24.348 \| good	0.29 \| good
2026-10-22T18:00:00.000Z	64 \| moderate	16.19 \| fine	72.338 \| fine	22.21 \| good	1.775 \| good	23.632 \| good	0.244 \| good
2026-10-22T19:00:00.000Z	62 \| moderate	15.462 \| fine	68.917 \| fine	28.55 \| good	2.757 \| good	18.157 \| good	0.215 \| good
2026-10-22T20:00:00.000Z	60 \| moderate	13.525 \| fine	60.817 \| fine	33.962 \| good	1.94 \| good	10.195 \| good	0.215 \| good
2026-10-22T21:00:00.000Z	60 \| moderate	14.357 \| fine	64.671 \| fine	33.213 \| good	2.054 \| good	10.858 \| good	0.213 \| good
2026-10-22T22:00:00.000Z	56 \| moderate	12.103 \| fine	54.473 \| good	36.86 \| good	1.893 \| good	24.773 \| good	0.28 \| good
2026-10-22T23:00:00.000Z	67 \| moderate	17.705 \| fine	78.835 \| fine	20.814 \| good	2.006 \| good	42.085 \| good	0.387 \| good
2026-10-23T00:00:00.000Z	69 \| moderate	19.485 \| fine	86.138 \| fine	13.038 \| good	2.269 \| good	48.891 \| good	0.466 \| good
2026-10-23T01:00:00.000Z	71 \| moderate	20.405 \| fine	89.492 \| fine	8.52 \| good	2.404 \| good	49.966 \| good	0.48 \| good
2026-10-23T02:00:00.000Z	71 \| moderate	19.656 \| fine	86.753 \| fine	2.435 \| good	2.555 \| good	50.751 \| good	0.473 \| good
2026-10-23T03:00:00.000Z	69 \| moderate	18.773 \| fine	82.729 \| fine	1.413 \| good	2.723 \| good	50.52 \| good	0.47 \| good
2026-10-23T04:00:00.000Z	66 \| moderate	16.797 \| fine	74.763 \| fine	1.942 \| good	2.849 \| good	49.763 \| good	0.473 \| good
2026-10-23T05:00:00.000Z	64 \| moderate	16.048 \| fine	71.504 \| fine	2.753 \| good	2.816 \| good	48.615 \| good	0.471 \| good
2026-10-23T06:00:00.000Z	67 \| moderate	17.688 \| fine	78.296 \| fine	3.188 \| good	2.75 \| good	47.171 \| good	0.451 \| good
2026-10-23T07:00:00.000Z	73 \| moderate	21.414 \| fine	94.087 \| fine	2.759 \| good	2.804 \| good	45.53 \| good	0.43 \| good
2026-10-23T08:00:00.000Z	79 \| moderate	24.367 \| fine	105.835 \| fine	2.057 \| good	2.931 \| good	43.719 \| good	0.414 \| good
2026-10-23T09:00:00.000Z	81 \| moderate	24.811 \| fine	108.183 \| fine	1.723 \| good	3.084 \| good	41.65 \| good	0.399 \| good
2026-10-23T10:00:00.000Z	82 \| moderate	25.667 \| fine	112.069 \| fine	1.59 \| good	3.293 \| good	39.587 \| good	0.386 \| good
2026-10-23T11:00:00.000Z	84 \| moderate	26.685 \| fine	116.006 \| fine	1.057 \| good	3.459 \| good	37.922 \| good	0.381 \| good
2026-10-23T12:00:00.000Z	82 \| moderate	26.41 \| fine	115.37 \| fine	0.588 \| good	3.677 \| good	37.085 \| good	0.394 \| good
2026-10-23T13:00:00.000Z	84 \| moderate	26.611 \| fine	115.997 \| fine	3.207 \| good	3.838 \| good	33.637 \| good	0.435 \| good
2026-10-23T14:00:00.000Z	81 \| moderate	25.128 \| fine	109.577 \| fine	12.31 \| good	3.4 \| good	28.554 \| good	0.425 \| good
2026-10-23T15:00:00.000Z	75 \| moderate	21.957 \| fine	96.465 \| fine	21.953 \| good	3.066 \| good	25.518 \| good	0.39 \| good
2026-10-23T16:00:00.000Z	69 \| moderate	18.833 \| fine	83.115 \| fine	31.874 \| good	2.639 \| good	21.38 \| good	0.318 \| good
2026-10-23T17:00:00.000Z	64 \| moderate	15.827 \| fine	70.88 \| fine	40.248 \| good	2.287 \| good	16.46 \| good	0.262 \| good
2026-10-23T18:00:00.000Z	60 \| moderate	14.368 \| fine	64.342 \| fine	47.526 \| good	2.251 \| good	11.077 \| good	0.224 \| good
2026-10-23T19:00:00.000Z	58 \| moderate	13.251 \| fine	59.784 \| fine	52.154 \| good	2.221 \| good	8.061 \| good	0.209 \| good
2026-10-23T20:00:00.000Z	56 \| moderate	11.709 \| good	51.675 \| good	53.525 \| good	2.145 \| good	7.043 \| good	0.203 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	10.191 \| good	45.393 \| good	51.257 \| good	2.126 \| good	7.534 \| good	0.203 \| good
2026-10-23T22:00:00.000Z	56 \| moderate	11.62 \| good	51.797 \| good	33.767 \| good	2.047 \| good	14.194 \| good	0.232 \| good
2026-10-23T23:00:00.000Z	62 \| moderate	15.248 \| fine	68.106 \| fine	18.941 \| good	2.089 \| good	26.316 \| good	0.283 \| good
2026-10-24T00:00:00.000Z	66 \| moderate	17.123 \| fine	76.012 \| fine	12.669 \| good	2.207 \| good	34.879 \| good	0.307 \| good
2026-10-24T01:00:00.000Z	66 \| moderate	16.873 \| fine	75.068 \| fine	8.205 \| good	2.291 \| good	37.327 \| good	0.296 \| good
2026-10-24T02:00:00.000Z	66 \| moderate	17.177 \| fine	75.856 \| fine	7.946 \| good	2.319 \| good	37.878 \| good	0.285 \| good
2026-10-24T03:00:00.000Z	64 \| moderate	16.414 \| fine	72.963 \| fine	14.914 \| good	2.307 \| good	36.605 \| good	0.275 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	14.708 \| fine	66.21 \| fine	17.279 \| good	2.253 \| good	33.031 \| good	0.266 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.213 \| fine	59.847 \| fine	18.088 \| good	2.129 \| good	26.206 \| good	0.256 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	13.524 \| fine	60.645 \| fine	16.986 \| good	2.006 \| good	20.083 \| good	0.245 \| good
2026-10-24T07:00:00.000Z	60 \| moderate	13.622 \| fine	61.125 \| fine	15.377 \| good	1.863 \| good	16.103 \| good	0.237 \| good
2026-10-24T08:00:00.000Z	60 \| moderate	13.549 \| fine	60.838 \| fine	14.658 \| good	1.743 \| good	13.659 \| good	0.232 \| good
2026-10-24T09:00:00.000Z	60 \| moderate	14.001 \| fine	62.838 \| fine	13.101 \| good	1.658 \| good	12.451 \| good	0.231 \| good
2026-10-24T10:00:00.000Z	58 \| moderate	13.331 \| fine	60.308 \| fine	13.562 \| good	1.613 \| good	12.281 \| good	0.232 \| good
2026-10-24T11:00:00.000Z	64 \| moderate	15.582 \| fine	69.233 \| fine	11.931 \| good	1.615 \| good	13.288 \| good	0.235 \| good
2026-10-24T12:00:00.000Z	67 \| moderate	17.816 \| fine	78.534 \| fine	10.662 \| good	1.686 \| good	17.808 \| good	0.246 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	19.706 \| fine	87.379 \| fine	14.892 \| good	1.765 \| good	19.313 \| good	0.261 \| good
2026-10-24T14:00:00.000Z	73 \| moderate	20.781 \| fine	91.3 \| fine	24.653 \| good	1.789 \| good	17.978 \| good	0.277 \| good
2026-10-24T15:00:00.000Z	67 \| moderate	18.089 \| fine	80.476 \| fine	33.099 \| good	1.845 \| good	16.11 \| good	0.27 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	15.479 \| fine	69.443 \| fine	40.171 \| good	1.876 \| good	14.782 \| good	0.261 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	13.157 \| fine	59.087 \| fine	44.601 \| good	1.909 \| good	13.71 \| good	0.253 \| good
2026-10-24T18:00:00.000Z	58 \| moderate	12.745 \| fine	56.984 \| fine	47.329 \| good	1.919 \| good	11.912 \| good	0.24 \| good
2026-10-24T19:00:00.000Z	56 \| moderate	12.34 \| fine	55.816 \| fine	50.618 \| good	1.87 \| good	9.918 \| good	0.225 \| good
2026-10-24T20:00:00.000Z	54 \| moderate	11.148 \| good	49.388 \| good	51.189 \| good	1.845 \| good	9.19 \| good	0.216 \| good
2026-10-24T21:00:00.000Z	54 \| moderate	10.558 \| good	46.688 \| good	49.585 \| good	1.827 \| good	10.251 \| good	0.215 \| good

Live air quality index in Westchester, Illinois today

Major air pollutants in Westchester, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)