What is the current concentration of PM10 in O'fallon, Illinois?

The current PM10 concentration at O'fallon, Illinois is 36.107 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in O'fallon, Illinois?

The current sulfur dioxide (SO2) concentration at O'fallon, Illinois is 1.753 ppb.

What is the current concentration of ozone (O3) in O'fallon, Illinois?

The current ozone (O3) concentration at O'fallon, Illinois is 55.015 ppm.

What is the current concentration of nitrogen dioxide (NO2) in O'fallon, Illinois?

The current nitrogen dioxide (NO2) concentration at O'fallon, Illinois is 5.065 ppb.

O'Fallon, Illinois live air quality index now

Q: What is the current concentration of PM2.5 in O'fallon, Illinois?

The current PM2.5 concentration at O'fallon, Illinois is 7.029 μg/m3.

Stay updated with real-time air quality in O'Fallon, 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

O'Fallon, Illinois

Last updated: ... (Local time)

Major air pollutants in O'Fallon, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.03 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

36.11 μg/m³

155

255

425

605+

Ozone (O₃)

55.02 ppb

201

201+

Sulfur Dioxide (SO₂)

1.75 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.07 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

O'Fallon, Illinois

Get Live Pollen Counts

O'Fallon, Illinois

Scroll To Air Quality Map

Track live O'Fallon, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T23:00:00.000Z	45 \| good	3.713 \| good	16.915 \| good	49.096 \| good	1.258 \| good	5.885 \| good	0.228 \| good
2026-10-21T00:00:00.000Z	44 \| good	4.15 \| good	19.8 \| good	46.642 \| good	1.135 \| good	9.594 \| good	0.409 \| good
2026-10-21T01:00:00.000Z	38 \| good	7.334 \| good	34.905 \| good	40.265 \| good	0.888 \| good	14.057 \| good	0.654 \| good
2026-10-21T02:00:00.000Z	54 \| moderate	11.035 \| good	32.809 \| good	33.492 \| good	0.805 \| good	19.788 \| good	0.71 \| good
2026-10-21T03:00:00.000Z	56 \| moderate	12.443 \| fine	56.55 \| fine	13.116 \| good	1.048 \| good	20.723 \| good	0.283 \| good
2026-10-21T04:00:00.000Z	60 \| moderate	14.343 \| fine	39.007 \| good	22.843 \| good	0.712 \| good	29.402 \| good	0.614 \| good
2026-10-21T05:00:00.000Z	60 \| moderate	14.311 \| fine	34.796 \| good	17.306 \| good	0.671 \| good	30.606 \| good	0.785 \| good
2026-10-21T06:00:00.000Z	64 \| moderate	15.52 \| fine	44.874 \| good	12.074 \| good	0.79 \| good	30.305 \| good	0.898 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.532 \| fine	49.568 \| good	22.372 \| good	0.784 \| good	27.887 \| good	0.898 \| good
2026-10-21T08:00:00.000Z	58 \| moderate	13.243 \| fine	64.98 \| fine	20.669 \| good	0.784 \| good	26.768 \| good	0.898 \| good
2026-10-21T09:00:00.000Z	49 \| good	9.165 \| good	30.006 \| good	23.753 \| good	0.668 \| good	21.111 \| good	0.766 \| good
2026-10-21T10:00:00.000Z	44 \| good	8.275 \| good	27.041 \| good	19.229 \| good	0.572 \| good	20.484 \| good	0.774 \| good
2026-10-21T11:00:00.000Z	44 \| good	8.202 \| good	25.419 \| good	20.629 \| good	0.775 \| good	20.613 \| good	0.726 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.993 \| good	25.778 \| good	21.478 \| good	0.995 \| good	18.254 \| good	0.819 \| good
2026-10-21T13:00:00.000Z	54 \| moderate	7.809 \| good	61.914 \| fine	17.261 \| good	0.991 \| good	16.912 \| good	0.825 \| good
2026-10-21T14:00:00.000Z	56 \| moderate	12.023 \| good	61.963 \| fine	7.949 \| good	1.22 \| good	16.494 \| good	0.942 \| good
2026-10-21T15:00:00.000Z	56 \| moderate	12.43 \| fine	60.285 \| fine	14.48 \| good	1.192 \| good	23.424 \| good	0.713 \| good
2026-10-21T16:00:00.000Z	58 \| moderate	12.76 \| fine	58.396 \| fine	19.663 \| good	0.948 \| good	21.382 \| good	0.551 \| good
2026-10-21T17:00:00.000Z	56 \| moderate	12.279 \| fine	59.739 \| fine	23.935 \| good	2.953 \| good	19.189 \| good	0.424 \| good
2026-10-21T18:00:00.000Z	52 \| moderate	9.613 \| good	44.657 \| good	41.121 \| good	2.533 \| good	11.689 \| good	0.294 \| good
2026-10-21T19:00:00.000Z	49 \| good	8.577 \| good	41.789 \| good	46.434 \| good	1.867 \| good	9.444 \| good	0.274 \| good
2026-10-21T20:00:00.000Z	44 \| good	6.925 \| good	27.652 \| good	47.944 \| good	1.279 \| good	9.463 \| good	0.24 \| good
2026-10-21T21:00:00.000Z	49 \| good	6.528 \| good	20.342 \| good	52.808 \| good	1.073 \| good	8.575 \| good	0.229 \| good
2026-10-21T22:00:00.000Z	48 \| good	6.924 \| good	28.994 \| good	51.626 \| good	0.981 \| good	8.043 \| good	0.248 \| good
2026-10-21T23:00:00.000Z	54 \| moderate	5.079 \| good	25.032 \| good	55.812 \| fine	0.882 \| good	7.439 \| good	0.248 \| good
2026-10-22T00:00:00.000Z	47 \| good	5.891 \| good	29.147 \| good	50.91 \| good	0.708 \| good	13.837 \| good	0.287 \| good
2026-10-22T01:00:00.000Z	49 \| good	8.501 \| good	35.534 \| good	49.988 \| good	0.791 \| good	29.206 \| good	0.652 \| good
2026-10-22T02:00:00.000Z	54 \| moderate	10.569 \| good	49.626 \| good	42.443 \| good	0.702 \| good	35.705 \| good	0.682 \| good
2026-10-22T03:00:00.000Z	54 \| moderate	11.385 \| good	50.177 \| good	24.117 \| good	2.985 \| good	36.184 \| good	0.422 \| good
2026-10-22T04:00:00.000Z	58 \| moderate	12.514 \| fine	53.512 \| good	31.071 \| good	0.92 \| good	29.392 \| good	0.949 \| good
2026-10-22T05:00:00.000Z	54 \| moderate	11.026 \| good	58.594 \| fine	29.763 \| good	0.716 \| good	27.229 \| good	0.92 \| good
2026-10-22T06:00:00.000Z	54 \| moderate	10.604 \| good	45.73 \| good	26.927 \| good	0.644 \| good	22.244 \| good	0.897 \| good
2026-10-22T07:00:00.000Z	54 \| moderate	10.905 \| good	50.082 \| good	15.472 \| good	0.661 \| good	18.485 \| good	0.901 \| good
2026-10-22T08:00:00.000Z	46 \| good	8.176 \| good	49.716 \| good	19.728 \| good	0.657 \| good	16.858 \| good	0.845 \| good
2026-10-22T09:00:00.000Z	49 \| good	8.918 \| good	41.083 \| good	16.127 \| good	0.665 \| good	18.702 \| good	0.825 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.607 \| fine	51.617 \| good	14.112 \| good	0.673 \| good	16.62 \| good	0.732 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	12.198 \| fine	52.547 \| good	14.503 \| good	0.67 \| good	15.504 \| good	0.765 \| good
2026-10-22T12:00:00.000Z	44 \| good	7.794 \| good	39.29 \| good	12.065 \| good	0.72 \| good	17.368 \| good	0.815 \| good
2026-10-22T13:00:00.000Z	52 \| moderate	10.175 \| good	35.127 \| good	9.106 \| good	0.712 \| good	18.398 \| good	0.784 \| good
2026-10-22T14:00:00.000Z	49 \| good	9.465 \| good	35.185 \| good	10.305 \| good	0.697 \| good	15.232 \| good	0.814 \| good
2026-10-22T15:00:00.000Z	76 \| moderate	8.334 \| good	106.153 \| fine	15.617 \| good	0.965 \| good	13.711 \| good	0.775 \| good
2026-10-22T16:00:00.000Z	58 \| moderate	11.259 \| good	70.292 \| fine	16.56 \| good	1.001 \| good	15.3 \| good	0.72 \| good
2026-10-22T17:00:00.000Z	52 \| moderate	8.303 \| good	57.276 \| fine	24.944 \| good	4.516 \| good	16.411 \| good	0.549 \| good
2026-10-22T18:00:00.000Z	38 \| good	7.446 \| good	29.13 \| good	41.262 \| good	4.475 \| good	10.011 \| good	0.504 \| good
2026-10-22T19:00:00.000Z	49 \| good	8.621 \| good	42.882 \| good	35.266 \| good	4.408 \| good	6.441 \| good	0.435 \| good
2026-10-22T20:00:00.000Z	46 \| good	7.588 \| good	33.022 \| good	50.318 \| good	2.241 \| good	7.069 \| good	0.193 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	7.029 \| good	36.107 \| good	55.015 \| fine	1.753 \| good	5.065 \| good	0.193 \| good
2026-10-22T22:00:00.000Z	51 \| moderate	7.029 \| good	36.107 \| good	55.015 \| fine	1.753 \| good	5.065 \| good	0.193 \| good
2026-10-22T07:00:00.000Z	56 \| moderate	11.792 \| good	52.357 \| good	19.73 \| good	2.908 \| good	38.874 \| good	0.523 \| good
2026-10-22T08:00:00.000Z	58 \| moderate	12.627 \| fine	56.827 \| fine	17.901 \| good	2.737 \| good	38.126 \| good	0.538 \| good
2026-10-22T09:00:00.000Z	58 \| moderate	12.502 \| fine	56.66 \| fine	17.697 \| good	2.551 \| good	37.128 \| good	0.548 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.801 \| fine	61.365 \| fine	17.505 \| good	2.399 \| good	36.057 \| good	0.552 \| good
2026-10-22T11:00:00.000Z	60 \| moderate	13.578 \| fine	61.173 \| fine	16.818 \| good	2.287 \| good	35.174 \| good	0.557 \| good
2026-10-22T12:00:00.000Z	60 \| moderate	13.692 \| fine	61.244 \| fine	14.135 \| good	2.223 \| good	34.381 \| good	0.568 \| good
2026-10-22T13:00:00.000Z	62 \| moderate	14.655 \| fine	64.917 \| fine	13.703 \| good	2.221 \| good	30.519 \| good	0.596 \| good
2026-10-22T14:00:00.000Z	60 \| moderate	14.297 \| fine	64.713 \| fine	22.506 \| good	2.19 \| good	24.812 \| good	0.534 \| good
2026-10-22T15:00:00.000Z	58 \| moderate	12.983 \| fine	58.808 \| fine	34.035 \| good	2.539 \| good	19.179 \| good	0.373 \| good
2026-10-22T16:00:00.000Z	60 \| moderate	13.581 \| fine	60.865 \| fine	43.027 \| good	2.57 \| good	10.435 \| good	0.252 \| good
2026-10-22T17:00:00.000Z	56 \| moderate	12.079 \| good	54.604 \| good	49.452 \| good	2.452 \| good	5.064 \| good	0.193 \| good
2026-10-22T18:00:00.000Z	54 \| moderate	10.713 \| good	47.707 \| good	53.421 \| good	2.069 \| good	2.488 \| good	0.166 \| good
2026-10-22T19:00:00.000Z	52 \| moderate	9.922 \| good	43.901 \| good	54.442 \| good	1.758 \| good	1.705 \| good	0.158 \| good
2026-10-22T20:00:00.000Z	58 \| moderate	10.269 \| good	45.711 \| good	56.959 \| fine	1.594 \| good	1.459 \| good	0.155 \| good
2026-10-22T21:00:00.000Z	67 \| moderate	9.133 \| good	40.527 \| good	59.649 \| fine	1.507 \| good	1.488 \| good	0.154 \| good
2026-10-22T22:00:00.000Z	58 \| moderate	9.609 \| good	42.74 \| good	57.476 \| fine	1.436 \| good	1.923 \| good	0.155 \| good
2026-10-22T23:00:00.000Z	44 \| good	8.043 \| good	35.576 \| good	47.571 \| good	1.354 \| good	8.565 \| good	0.208 \| good
2026-10-23T00:00:00.000Z	52 \| moderate	10.477 \| good	46.589 \| good	38.543 \| good	1.41 \| good	15.492 \| good	0.264 \| good
2026-10-23T01:00:00.000Z	52 \| moderate	9.646 \| good	42.673 \| good	26.687 \| good	1.46 \| good	21.14 \| good	0.305 \| good
2026-10-23T02:00:00.000Z	54 \| moderate	10.635 \| good	47.438 \| good	24.343 \| good	1.482 \| good	24.737 \| good	0.335 \| good
2026-10-23T03:00:00.000Z	56 \| moderate	12.439 \| fine	56.234 \| fine	20.801 \| good	1.464 \| good	26.308 \| good	0.355 \| good
2026-10-23T04:00:00.000Z	56 \| moderate	12.378 \| fine	56.193 \| fine	16.581 \| good	1.394 \| good	26.254 \| good	0.366 \| good
2026-10-23T05:00:00.000Z	60 \| moderate	14.104 \| fine	62.986 \| fine	15.105 \| good	1.243 \| good	24.916 \| good	0.365 \| good
2026-10-23T06:00:00.000Z	62 \| moderate	15.38 \| fine	68.595 \| fine	14.685 \| good	1.045 \| good	21.696 \| good	0.348 \| good
2026-10-23T07:00:00.000Z	62 \| moderate	14.758 \| fine	66.552 \| fine	18.636 \| good	0.889 \| good	17.804 \| good	0.321 \| good
2026-10-23T08:00:00.000Z	58 \| moderate	13.351 \| fine	60.761 \| fine	17.645 \| good	0.783 \| good	14.079 \| good	0.294 \| good
2026-10-23T09:00:00.000Z	58 \| moderate	12.801 \| fine	57.117 \| fine	17.45 \| good	0.737 \| good	11.25 \| good	0.272 \| good
2026-10-23T10:00:00.000Z	60 \| moderate	13.629 \| fine	61.117 \| fine	17.61 \| good	0.739 \| good	9.665 \| good	0.261 \| good
2026-10-23T11:00:00.000Z	64 \| moderate	15.728 \| fine	70.753 \| fine	13.621 \| good	0.771 \| good	9.182 \| good	0.257 \| good
2026-10-23T12:00:00.000Z	62 \| moderate	15.096 \| fine	67.276 \| fine	12.185 \| good	0.836 \| good	10.021 \| good	0.262 \| good
2026-10-23T13:00:00.000Z	64 \| moderate	15.705 \| fine	70.553 \| fine	15.149 \| good	0.924 \| good	11.125 \| good	0.28 \| good
2026-10-23T14:00:00.000Z	66 \| moderate	16.893 \| fine	74.879 \| fine	24.151 \| good	0.915 \| good	8.48 \| good	0.282 \| good
2026-10-23T15:00:00.000Z	62 \| moderate	15.061 \| fine	66.992 \| fine	31.696 \| good	1.05 \| good	5.934 \| good	0.254 \| good
2026-10-23T16:00:00.000Z	62 \| moderate	14.737 \| fine	65.229 \| fine	39.168 \| good	1.229 \| good	3.887 \| good	0.227 \| good
2026-10-23T17:00:00.000Z	58 \| moderate	13.164 \| fine	59.158 \| fine	45.313 \| good	1.503 \| good	2.208 \| good	0.202 \| good
2026-10-23T18:00:00.000Z	58 \| moderate	12.908 \| fine	58.715 \| fine	47.823 \| good	1.486 \| good	1.244 \| good	0.185 \| good
2026-10-23T19:00:00.000Z	56 \| moderate	11.564 \| good	51.035 \| good	50.099 \| good	1.392 \| good	1.011 \| good	0.18 \| good
2026-10-23T20:00:00.000Z	52 \| moderate	10.499 \| good	46.261 \| good	51.313 \| good	1.338 \| good	0.999 \| good	0.179 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	10.395 \| good	46.052 \| good	54.251 \| good	1.306 \| good	1.122 \| good	0.179 \| good
2026-10-23T22:00:00.000Z	58 \| moderate	12.873 \| fine	57.585 \| fine	51.517 \| good	1.267 \| good	1.62 \| good	0.182 \| good
2026-10-23T23:00:00.000Z	58 \| moderate	12.669 \| fine	56.942 \| fine	42.974 \| good	1.153 \| good	4.615 \| good	0.206 \| good
2026-10-24T00:00:00.000Z	60 \| moderate	13.921 \| fine	62.78 \| fine	36.685 \| good	1.103 \| good	6.697 \| good	0.223 \| good
2026-10-24T01:00:00.000Z	58 \| moderate	12.658 \| fine	57.222 \| fine	27.49 \| good	1.08 \| good	6.467 \| good	0.219 \| good
2026-10-24T02:00:00.000Z	56 \| moderate	11.931 \| good	53.878 \| good	24.805 \| good	1.077 \| good	6.06 \| good	0.215 \| good
2026-10-24T03:00:00.000Z	56 \| moderate	12.154 \| fine	54.53 \| good	25.12 \| good	1.085 \| good	5.682 \| good	0.211 \| good
2026-10-24T04:00:00.000Z	58 \| moderate	12.795 \| fine	57.402 \| fine	23.642 \| good	1.094 \| good	5.471 \| good	0.209 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.32 \| fine	59.487 \| fine	23.555 \| good	1.08 \| good	5.196 \| good	0.209 \| good
2026-10-24T06:00:00.000Z	58 \| moderate	13.168 \| fine	59.402 \| fine	21.219 \| good	1.047 \| good	4.942 \| good	0.209 \| good

O'Fallon

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O'Fallon, Illinois air quality map: Track AQI near you

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How accurate is Illinois, USA air quality data?

Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for O'fallon, Illinois updated?

The air quality for O'fallon, Illinois is updated every hour.

When was the worst air quality at O'fallon, Illinois in the last 24 hrs?

The worst air quality in O'fallon, Illinois in the last 24 hours was observed at 03:00:00 on 2026-10-22.

When was the best air quality at O'fallon, Illinois in the last 24 hrs?

In the last 24 hrs, the best air quality in O'fallon, Illinois was observed at 06:00:00 on 2026-10-22.

What is the current air quality in O'fallon, Illinois?

The current air quality in O'fallon, Illinois is 51, categorized as Moderate based on real-time data.

What pollutant is the most common in O'fallon, Illinois?

The most common pollutant in O'fallon, Illinois is O3.

What should I do if the air quality in O'fallon, Illinois is poor?

If the air quality in O'fallon, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in O'fallon, Illinois?

The current PM_2.5 concentration at O'fallon, Illinois is 7.029 μg/m³.

What is the current concentration of PM₁₀ in O'fallon, Illinois?

The current PM₁₀ concentration at O'fallon, Illinois is 36.107 μg/m³.

What is the current concentration of carbon monoxide (CO) in O'fallon, Illinois?

The current carbon monoxide (CO) concentration at O'fallon, Illinois is 0.193 ppm.

What is the current concentration of sulfur dioxide (SO₂) in O'fallon, Illinois?

The current sulfur dioxide (SO₂) concentration at O'fallon, Illinois is 1.753 ppb.

What is the current concentration of ozone (O₃) in O'fallon, Illinois?

The current ozone (O₃) concentration at O'fallon, Illinois is 55.015 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in O'fallon, Illinois?

The current nitrogen dioxide (NO₂) concentration at O'fallon, Illinois is 5.065 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T23:00:00.000Z	45 \| good	3.713 \| good	16.915 \| good	49.096 \| good	1.258 \| good	5.885 \| good	0.228 \| good
2026-10-21T00:00:00.000Z	44 \| good	4.15 \| good	19.8 \| good	46.642 \| good	1.135 \| good	9.594 \| good	0.409 \| good
2026-10-21T01:00:00.000Z	38 \| good	7.334 \| good	34.905 \| good	40.265 \| good	0.888 \| good	14.057 \| good	0.654 \| good
2026-10-21T02:00:00.000Z	54 \| moderate	11.035 \| good	32.809 \| good	33.492 \| good	0.805 \| good	19.788 \| good	0.71 \| good
2026-10-21T03:00:00.000Z	56 \| moderate	12.443 \| fine	56.55 \| fine	13.116 \| good	1.048 \| good	20.723 \| good	0.283 \| good
2026-10-21T04:00:00.000Z	60 \| moderate	14.343 \| fine	39.007 \| good	22.843 \| good	0.712 \| good	29.402 \| good	0.614 \| good
2026-10-21T05:00:00.000Z	60 \| moderate	14.311 \| fine	34.796 \| good	17.306 \| good	0.671 \| good	30.606 \| good	0.785 \| good
2026-10-21T06:00:00.000Z	64 \| moderate	15.52 \| fine	44.874 \| good	12.074 \| good	0.79 \| good	30.305 \| good	0.898 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.532 \| fine	49.568 \| good	22.372 \| good	0.784 \| good	27.887 \| good	0.898 \| good
2026-10-21T08:00:00.000Z	58 \| moderate	13.243 \| fine	64.98 \| fine	20.669 \| good	0.784 \| good	26.768 \| good	0.898 \| good
2026-10-21T09:00:00.000Z	49 \| good	9.165 \| good	30.006 \| good	23.753 \| good	0.668 \| good	21.111 \| good	0.766 \| good
2026-10-21T10:00:00.000Z	44 \| good	8.275 \| good	27.041 \| good	19.229 \| good	0.572 \| good	20.484 \| good	0.774 \| good
2026-10-21T11:00:00.000Z	44 \| good	8.202 \| good	25.419 \| good	20.629 \| good	0.775 \| good	20.613 \| good	0.726 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.993 \| good	25.778 \| good	21.478 \| good	0.995 \| good	18.254 \| good	0.819 \| good
2026-10-21T13:00:00.000Z	54 \| moderate	7.809 \| good	61.914 \| fine	17.261 \| good	0.991 \| good	16.912 \| good	0.825 \| good
2026-10-21T14:00:00.000Z	56 \| moderate	12.023 \| good	61.963 \| fine	7.949 \| good	1.22 \| good	16.494 \| good	0.942 \| good
2026-10-21T15:00:00.000Z	56 \| moderate	12.43 \| fine	60.285 \| fine	14.48 \| good	1.192 \| good	23.424 \| good	0.713 \| good
2026-10-21T16:00:00.000Z	58 \| moderate	12.76 \| fine	58.396 \| fine	19.663 \| good	0.948 \| good	21.382 \| good	0.551 \| good
2026-10-21T17:00:00.000Z	56 \| moderate	12.279 \| fine	59.739 \| fine	23.935 \| good	2.953 \| good	19.189 \| good	0.424 \| good
2026-10-21T18:00:00.000Z	52 \| moderate	9.613 \| good	44.657 \| good	41.121 \| good	2.533 \| good	11.689 \| good	0.294 \| good
2026-10-21T19:00:00.000Z	49 \| good	8.577 \| good	41.789 \| good	46.434 \| good	1.867 \| good	9.444 \| good	0.274 \| good
2026-10-21T20:00:00.000Z	44 \| good	6.925 \| good	27.652 \| good	47.944 \| good	1.279 \| good	9.463 \| good	0.24 \| good
2026-10-21T21:00:00.000Z	49 \| good	6.528 \| good	20.342 \| good	52.808 \| good	1.073 \| good	8.575 \| good	0.229 \| good
2026-10-21T22:00:00.000Z	48 \| good	6.924 \| good	28.994 \| good	51.626 \| good	0.981 \| good	8.043 \| good	0.248 \| good
2026-10-21T23:00:00.000Z	54 \| moderate	5.079 \| good	25.032 \| good	55.812 \| fine	0.882 \| good	7.439 \| good	0.248 \| good
2026-10-22T00:00:00.000Z	47 \| good	5.891 \| good	29.147 \| good	50.91 \| good	0.708 \| good	13.837 \| good	0.287 \| good
2026-10-22T01:00:00.000Z	49 \| good	8.501 \| good	35.534 \| good	49.988 \| good	0.791 \| good	29.206 \| good	0.652 \| good
2026-10-22T02:00:00.000Z	54 \| moderate	10.569 \| good	49.626 \| good	42.443 \| good	0.702 \| good	35.705 \| good	0.682 \| good
2026-10-22T03:00:00.000Z	54 \| moderate	11.385 \| good	50.177 \| good	24.117 \| good	2.985 \| good	36.184 \| good	0.422 \| good
2026-10-22T04:00:00.000Z	58 \| moderate	12.514 \| fine	53.512 \| good	31.071 \| good	0.92 \| good	29.392 \| good	0.949 \| good
2026-10-22T05:00:00.000Z	54 \| moderate	11.026 \| good	58.594 \| fine	29.763 \| good	0.716 \| good	27.229 \| good	0.92 \| good
2026-10-22T06:00:00.000Z	54 \| moderate	10.604 \| good	45.73 \| good	26.927 \| good	0.644 \| good	22.244 \| good	0.897 \| good
2026-10-22T07:00:00.000Z	54 \| moderate	10.905 \| good	50.082 \| good	15.472 \| good	0.661 \| good	18.485 \| good	0.901 \| good
2026-10-22T08:00:00.000Z	46 \| good	8.176 \| good	49.716 \| good	19.728 \| good	0.657 \| good	16.858 \| good	0.845 \| good
2026-10-22T09:00:00.000Z	49 \| good	8.918 \| good	41.083 \| good	16.127 \| good	0.665 \| good	18.702 \| good	0.825 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.607 \| fine	51.617 \| good	14.112 \| good	0.673 \| good	16.62 \| good	0.732 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	12.198 \| fine	52.547 \| good	14.503 \| good	0.67 \| good	15.504 \| good	0.765 \| good
2026-10-22T12:00:00.000Z	44 \| good	7.794 \| good	39.29 \| good	12.065 \| good	0.72 \| good	17.368 \| good	0.815 \| good
2026-10-22T13:00:00.000Z	52 \| moderate	10.175 \| good	35.127 \| good	9.106 \| good	0.712 \| good	18.398 \| good	0.784 \| good
2026-10-22T14:00:00.000Z	49 \| good	9.465 \| good	35.185 \| good	10.305 \| good	0.697 \| good	15.232 \| good	0.814 \| good
2026-10-22T15:00:00.000Z	76 \| moderate	8.334 \| good	106.153 \| fine	15.617 \| good	0.965 \| good	13.711 \| good	0.775 \| good
2026-10-22T16:00:00.000Z	58 \| moderate	11.259 \| good	70.292 \| fine	16.56 \| good	1.001 \| good	15.3 \| good	0.72 \| good
2026-10-22T17:00:00.000Z	52 \| moderate	8.303 \| good	57.276 \| fine	24.944 \| good	4.516 \| good	16.411 \| good	0.549 \| good
2026-10-22T18:00:00.000Z	38 \| good	7.446 \| good	29.13 \| good	41.262 \| good	4.475 \| good	10.011 \| good	0.504 \| good
2026-10-22T19:00:00.000Z	49 \| good	8.621 \| good	42.882 \| good	35.266 \| good	4.408 \| good	6.441 \| good	0.435 \| good
2026-10-22T20:00:00.000Z	46 \| good	7.588 \| good	33.022 \| good	50.318 \| good	2.241 \| good	7.069 \| good	0.193 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	7.029 \| good	36.107 \| good	55.015 \| fine	1.753 \| good	5.065 \| good	0.193 \| good
2026-10-22T22:00:00.000Z	51 \| moderate	7.029 \| good	36.107 \| good	55.015 \| fine	1.753 \| good	5.065 \| good	0.193 \| good
2026-10-22T07:00:00.000Z	56 \| moderate	11.792 \| good	52.357 \| good	19.73 \| good	2.908 \| good	38.874 \| good	0.523 \| good
2026-10-22T08:00:00.000Z	58 \| moderate	12.627 \| fine	56.827 \| fine	17.901 \| good	2.737 \| good	38.126 \| good	0.538 \| good
2026-10-22T09:00:00.000Z	58 \| moderate	12.502 \| fine	56.66 \| fine	17.697 \| good	2.551 \| good	37.128 \| good	0.548 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.801 \| fine	61.365 \| fine	17.505 \| good	2.399 \| good	36.057 \| good	0.552 \| good
2026-10-22T11:00:00.000Z	60 \| moderate	13.578 \| fine	61.173 \| fine	16.818 \| good	2.287 \| good	35.174 \| good	0.557 \| good
2026-10-22T12:00:00.000Z	60 \| moderate	13.692 \| fine	61.244 \| fine	14.135 \| good	2.223 \| good	34.381 \| good	0.568 \| good
2026-10-22T13:00:00.000Z	62 \| moderate	14.655 \| fine	64.917 \| fine	13.703 \| good	2.221 \| good	30.519 \| good	0.596 \| good
2026-10-22T14:00:00.000Z	60 \| moderate	14.297 \| fine	64.713 \| fine	22.506 \| good	2.19 \| good	24.812 \| good	0.534 \| good
2026-10-22T15:00:00.000Z	58 \| moderate	12.983 \| fine	58.808 \| fine	34.035 \| good	2.539 \| good	19.179 \| good	0.373 \| good
2026-10-22T16:00:00.000Z	60 \| moderate	13.581 \| fine	60.865 \| fine	43.027 \| good	2.57 \| good	10.435 \| good	0.252 \| good
2026-10-22T17:00:00.000Z	56 \| moderate	12.079 \| good	54.604 \| good	49.452 \| good	2.452 \| good	5.064 \| good	0.193 \| good
2026-10-22T18:00:00.000Z	54 \| moderate	10.713 \| good	47.707 \| good	53.421 \| good	2.069 \| good	2.488 \| good	0.166 \| good
2026-10-22T19:00:00.000Z	52 \| moderate	9.922 \| good	43.901 \| good	54.442 \| good	1.758 \| good	1.705 \| good	0.158 \| good
2026-10-22T20:00:00.000Z	58 \| moderate	10.269 \| good	45.711 \| good	56.959 \| fine	1.594 \| good	1.459 \| good	0.155 \| good
2026-10-22T21:00:00.000Z	67 \| moderate	9.133 \| good	40.527 \| good	59.649 \| fine	1.507 \| good	1.488 \| good	0.154 \| good
2026-10-22T22:00:00.000Z	58 \| moderate	9.609 \| good	42.74 \| good	57.476 \| fine	1.436 \| good	1.923 \| good	0.155 \| good
2026-10-22T23:00:00.000Z	44 \| good	8.043 \| good	35.576 \| good	47.571 \| good	1.354 \| good	8.565 \| good	0.208 \| good
2026-10-23T00:00:00.000Z	52 \| moderate	10.477 \| good	46.589 \| good	38.543 \| good	1.41 \| good	15.492 \| good	0.264 \| good
2026-10-23T01:00:00.000Z	52 \| moderate	9.646 \| good	42.673 \| good	26.687 \| good	1.46 \| good	21.14 \| good	0.305 \| good
2026-10-23T02:00:00.000Z	54 \| moderate	10.635 \| good	47.438 \| good	24.343 \| good	1.482 \| good	24.737 \| good	0.335 \| good
2026-10-23T03:00:00.000Z	56 \| moderate	12.439 \| fine	56.234 \| fine	20.801 \| good	1.464 \| good	26.308 \| good	0.355 \| good
2026-10-23T04:00:00.000Z	56 \| moderate	12.378 \| fine	56.193 \| fine	16.581 \| good	1.394 \| good	26.254 \| good	0.366 \| good
2026-10-23T05:00:00.000Z	60 \| moderate	14.104 \| fine	62.986 \| fine	15.105 \| good	1.243 \| good	24.916 \| good	0.365 \| good
2026-10-23T06:00:00.000Z	62 \| moderate	15.38 \| fine	68.595 \| fine	14.685 \| good	1.045 \| good	21.696 \| good	0.348 \| good
2026-10-23T07:00:00.000Z	62 \| moderate	14.758 \| fine	66.552 \| fine	18.636 \| good	0.889 \| good	17.804 \| good	0.321 \| good
2026-10-23T08:00:00.000Z	58 \| moderate	13.351 \| fine	60.761 \| fine	17.645 \| good	0.783 \| good	14.079 \| good	0.294 \| good
2026-10-23T09:00:00.000Z	58 \| moderate	12.801 \| fine	57.117 \| fine	17.45 \| good	0.737 \| good	11.25 \| good	0.272 \| good
2026-10-23T10:00:00.000Z	60 \| moderate	13.629 \| fine	61.117 \| fine	17.61 \| good	0.739 \| good	9.665 \| good	0.261 \| good
2026-10-23T11:00:00.000Z	64 \| moderate	15.728 \| fine	70.753 \| fine	13.621 \| good	0.771 \| good	9.182 \| good	0.257 \| good
2026-10-23T12:00:00.000Z	62 \| moderate	15.096 \| fine	67.276 \| fine	12.185 \| good	0.836 \| good	10.021 \| good	0.262 \| good
2026-10-23T13:00:00.000Z	64 \| moderate	15.705 \| fine	70.553 \| fine	15.149 \| good	0.924 \| good	11.125 \| good	0.28 \| good
2026-10-23T14:00:00.000Z	66 \| moderate	16.893 \| fine	74.879 \| fine	24.151 \| good	0.915 \| good	8.48 \| good	0.282 \| good
2026-10-23T15:00:00.000Z	62 \| moderate	15.061 \| fine	66.992 \| fine	31.696 \| good	1.05 \| good	5.934 \| good	0.254 \| good
2026-10-23T16:00:00.000Z	62 \| moderate	14.737 \| fine	65.229 \| fine	39.168 \| good	1.229 \| good	3.887 \| good	0.227 \| good
2026-10-23T17:00:00.000Z	58 \| moderate	13.164 \| fine	59.158 \| fine	45.313 \| good	1.503 \| good	2.208 \| good	0.202 \| good
2026-10-23T18:00:00.000Z	58 \| moderate	12.908 \| fine	58.715 \| fine	47.823 \| good	1.486 \| good	1.244 \| good	0.185 \| good
2026-10-23T19:00:00.000Z	56 \| moderate	11.564 \| good	51.035 \| good	50.099 \| good	1.392 \| good	1.011 \| good	0.18 \| good
2026-10-23T20:00:00.000Z	52 \| moderate	10.499 \| good	46.261 \| good	51.313 \| good	1.338 \| good	0.999 \| good	0.179 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	10.395 \| good	46.052 \| good	54.251 \| good	1.306 \| good	1.122 \| good	0.179 \| good
2026-10-23T22:00:00.000Z	58 \| moderate	12.873 \| fine	57.585 \| fine	51.517 \| good	1.267 \| good	1.62 \| good	0.182 \| good
2026-10-23T23:00:00.000Z	58 \| moderate	12.669 \| fine	56.942 \| fine	42.974 \| good	1.153 \| good	4.615 \| good	0.206 \| good
2026-10-24T00:00:00.000Z	60 \| moderate	13.921 \| fine	62.78 \| fine	36.685 \| good	1.103 \| good	6.697 \| good	0.223 \| good
2026-10-24T01:00:00.000Z	58 \| moderate	12.658 \| fine	57.222 \| fine	27.49 \| good	1.08 \| good	6.467 \| good	0.219 \| good
2026-10-24T02:00:00.000Z	56 \| moderate	11.931 \| good	53.878 \| good	24.805 \| good	1.077 \| good	6.06 \| good	0.215 \| good
2026-10-24T03:00:00.000Z	56 \| moderate	12.154 \| fine	54.53 \| good	25.12 \| good	1.085 \| good	5.682 \| good	0.211 \| good
2026-10-24T04:00:00.000Z	58 \| moderate	12.795 \| fine	57.402 \| fine	23.642 \| good	1.094 \| good	5.471 \| good	0.209 \| good
2026-10-24T05:00:00.000Z	58 \| moderate	13.32 \| fine	59.487 \| fine	23.555 \| good	1.08 \| good	5.196 \| good	0.209 \| good
2026-10-24T06:00:00.000Z	58 \| moderate	13.168 \| fine	59.402 \| fine	21.219 \| good	1.047 \| good	4.942 \| good	0.209 \| good

O'Fallon, Illinois live air quality index now

Major air pollutants in O'Fallon, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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