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

The current PM10 concentration at O'fallon, Illinois is 14.84 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 0.545 ppb.

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

The current ozone (O3) concentration at O'fallon, Illinois is 22.993 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 3.685 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 2.456 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)

Good

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)

2.46 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.84 μg/m³

155

255

425

605+

Ozone (O₃)

22.99 ppb

201

201+

Sulfur Dioxide (SO₂)

0.55 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.69 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.15 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2025-10-20T12:00:00.000Z	16 \| good	3.033 \| good	7.854 \| good	14.716 \| good	0.574 \| good	16.603 \| good	0.263 \| good
2025-10-20T13:00:00.000Z	17 \| good	2.914 \| good	8.475 \| good	16.304 \| good	0.566 \| good	17.879 \| good	0.303 \| good
2025-10-20T14:00:00.000Z	16 \| good	3.425 \| good	13.896 \| good	15.807 \| good	0.689 \| good	13.623 \| good	0.345 \| good
2025-10-20T15:00:00.000Z	22 \| good	4.068 \| good	21.22 \| good	18.782 \| good	0.578 \| good	8.45 \| good	0.228 \| good
2025-10-20T16:00:00.000Z	28 \| good	3.41 \| good	29.916 \| good	21.527 \| good	0.53 \| good	6.235 \| good	0.228 \| good
2025-10-20T17:00:00.000Z	22 \| good	2.721 \| good	22.182 \| good	23.736 \| good	0.694 \| good	3.841 \| good	0.193 \| good
2025-10-20T18:00:00.000Z	29 \| good	3.213 \| good	20.395 \| good	31.203 \| good	0.872 \| good	3.858 \| good	0.19 \| good
2025-10-20T19:00:00.000Z	30 \| good	5.412 \| good	11.178 \| good	32.049 \| good	0.675 \| good	3.95 \| good	0.184 \| good
2025-10-20T20:00:00.000Z	33 \| good	6.428 \| good	29.45 \| good	31.508 \| good	0.661 \| good	3.862 \| good	0.235 \| good
2025-10-20T21:00:00.000Z	30 \| good	3.256 \| good	15.093 \| good	31.747 \| good	0.833 \| good	4.567 \| good	0.19 \| good
2025-10-20T22:00:00.000Z	34 \| good	6.155 \| good	13.654 \| good	37.012 \| good	0.916 \| good	4.397 \| good	0.19 \| good
2025-10-20T23:00:00.000Z	34 \| good	3.386 \| good	14.583 \| good	37.075 \| good	0.971 \| good	4.609 \| good	0.225 \| good
2025-10-21T00:00:00.000Z	38 \| good	3.558 \| good	15.214 \| good	41.415 \| good	0.922 \| good	4.929 \| good	0.235 \| good
2025-10-21T01:00:00.000Z	31 \| good	4.423 \| good	16.678 \| good	33.482 \| good	0.779 \| good	5.679 \| good	0.225 \| good
2025-10-21T02:00:00.000Z	32 \| good	3.878 \| good	16.891 \| good	34.659 \| good	0.809 \| good	5.576 \| good	0.19 \| good
2025-10-21T03:00:00.000Z	31 \| good	3.51 \| good	15.908 \| good	32.577 \| good	0.894 \| good	2.373 \| good	0.139 \| good
2025-10-21T04:00:00.000Z	33 \| good	3.87 \| good	20.386 \| good	35.691 \| good	0.862 \| good	4.189 \| good	0.239 \| good
2025-10-21T05:00:00.000Z	29 \| good	4.292 \| good	16.941 \| good	30.537 \| good	0.806 \| good	3.435 \| good	0.161 \| good
2025-10-21T06:00:00.000Z	31 \| good	4.33 \| good	21.479 \| good	33.236 \| good	0.982 \| good	3.866 \| good	0.163 \| good
2025-10-21T07:00:00.000Z	30 \| good	5.011 \| good	27.813 \| good	31.814 \| good	0.969 \| good	3.897 \| good	0.167 \| good
2025-10-21T08:00:00.000Z	28 \| good	3.709 \| good	19.054 \| good	30.3 \| good	0.964 \| good	3.93 \| good	0.167 \| good
2025-10-21T09:00:00.000Z	28 \| good	3.836 \| good	16.717 \| good	30.265 \| good	0.144 \| good	2.732 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	24 \| good	3.796 \| good	14.58 \| good	26.013 \| good	0.428 \| good	4.569 \| good	0.213 \| good
2025-10-21T11:00:00.000Z	22 \| good	3.717 \| good	16.733 \| good	21.937 \| good	0.464 \| good	6.227 \| good	0.192 \| good
2025-10-21T12:00:00.000Z	22 \| good	3.833 \| good	20.555 \| good	22.597 \| good	0.443 \| good	8.617 \| good	0.245 \| good
2025-10-21T13:00:00.000Z	24 \| good	3.828 \| good	19.096 \| good	26.002 \| good	0.443 \| good	8.729 \| good	0.273 \| good
2025-10-21T14:00:00.000Z	22 \| good	4.005 \| good	19.643 \| good	21.828 \| good	0.795 \| good	8.393 \| good	0.312 \| good
2025-10-21T15:00:00.000Z	22 \| good	4.097 \| good	17.152 \| good	24.374 \| good	2.58 \| good	6.251 \| good	0.229 \| good
2025-10-21T16:00:00.000Z	27 \| good	4.691 \| good	17.64 \| good	24.129 \| good	0.992 \| good	4.178 \| good	0.189 \| good
2025-10-21T17:00:00.000Z	27 \| good	5.041 \| good	13.929 \| good	27.461 \| good	0.633 \| good	3.003 \| good	0.189 \| good
2025-10-21T18:00:00.000Z	29 \| good	4.111 \| good	19.671 \| good	31.181 \| good	0.587 \| good	2.775 \| good	0.141 \| good
2025-10-21T19:00:00.000Z	30 \| good	3.464 \| good	13.151 \| good	32.249 \| good	0.559 \| good	3.045 \| good	0.202 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.592 \| good	20.144 \| good	33.546 \| good	0.543 \| good	2.921 \| good	0.206 \| good
2025-10-21T21:00:00.000Z	29 \| good	2.84 \| good	12.461 \| good	31.023 \| good	0.357 \| good	2.787 \| good	0.154 \| good
2025-10-21T22:00:00.000Z	31 \| good	2.694 \| good	20.031 \| good	34.026 \| good	0.414 \| good	2.855 \| good	0.106 \| good
2025-10-21T23:00:00.000Z	31 \| good	3.26 \| good	16.481 \| good	33.26 \| good	0.409 \| good	2.73 \| good	0.106 \| good
2025-10-22T00:00:00.000Z	32 \| good	2.926 \| good	10.841 \| good	35.389 \| good	0.459 \| good	3.875 \| good	0.106 \| good
2025-10-22T01:00:00.000Z	29 \| good	3.756 \| good	9.783 \| good	30.846 \| good	0.524 \| good	4.395 \| good	0.154 \| good
2025-10-22T02:00:00.000Z	29 \| good	3.026 \| good	17.577 \| good	30.915 \| good	0.51 \| good	5.606 \| good	0.189 \| good
2025-10-22T03:00:00.000Z	23 \| good	1.085 \| good	4.756 \| good	25.352 \| good	0.584 \| good	3.424 \| good	0.14 \| good
2025-10-22T04:00:00.000Z	27 \| good	1.886 \| good	8.813 \| good	28.73 \| good	0.528 \| good	5.735 \| good	0.189 \| good
2025-10-22T05:00:00.000Z	26 \| good	2.746 \| good	22.328 \| good	27.701 \| good	0.55 \| good	4.969 \| good	0.195 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.599 \| good	23.668 \| good	25.206 \| good	0.55 \| good	4.705 \| good	0.189 \| good
2025-10-22T07:00:00.000Z	23 \| good	2.6 \| good	21.548 \| good	25.066 \| good	0.55 \| good	4.698 \| good	0.189 \| good
2025-10-22T08:00:00.000Z	24 \| good	2.805 \| good	21.587 \| good	25.771 \| good	0.556 \| good	4.693 \| good	0.189 \| good
2025-10-22T09:00:00.000Z	22 \| good	2.789 \| good	16.571 \| good	23.768 \| good	0.625 \| good	1.83 \| good	0.168 \| good
2025-10-22T10:00:00.000Z	21 \| good	2.456 \| good	14.84 \| good	22.993 \| good	0.545 \| good	3.685 \| good	0.154 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.456 \| good	14.84 \| good	22.993 \| good	0.545 \| good	3.685 \| good	0.154 \| good
2025-10-22T12:00:00.000Z	22 \| good	4.246 \| good	18.937 \| good	20.596 \| good	0.599 \| good	2.773 \| good	0.123 \| good
2025-10-22T13:00:00.000Z	22 \| good	3.598 \| good	15.98 \| good	22.774 \| good	0.658 \| good	2.723 \| good	0.127 \| good
2025-10-22T14:00:00.000Z	24 \| good	3.228 \| good	14 \| good	26.356 \| good	0.717 \| good	2.672 \| good	0.131 \| good
2025-10-22T15:00:00.000Z	24 \| good	2.999 \| good	11.948 \| good	25.684 \| good	0.777 \| good	2.622 \| good	0.135 \| good
2025-10-22T16:00:00.000Z	25 \| good	1.924 \| good	7.776 \| good	26.619 \| good	0.775 \| good	2.223 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	28 \| good	1.003 \| good	3.841 \| good	29.758 \| good	0.772 \| good	1.823 \| good	0.128 \| good
2025-10-22T18:00:00.000Z	30 \| good	0.818 \| good	3.077 \| good	31.593 \| good	0.77 \| good	1.424 \| good	0.124 \| good
2025-10-22T19:00:00.000Z	31 \| good	2.23 \| good	9.447 \| good	33.723 \| good	0.738 \| good	1.364 \| good	0.124 \| good
2025-10-22T20:00:00.000Z	31 \| good	3.06 \| good	13.249 \| good	33.879 \| good	0.705 \| good	1.304 \| good	0.124 \| good
2025-10-22T21:00:00.000Z	28 \| good	2.125 \| good	8.649 \| good	30.141 \| good	0.673 \| good	1.244 \| good	0.125 \| good
2025-10-22T22:00:00.000Z	27 \| good	1.068 \| good	4.551 \| good	29.456 \| good	0.701 \| good	2.867 \| good	0.139 \| good
2025-10-22T23:00:00.000Z	21 \| good	0.755 \| good	2.809 \| good	23.443 \| good	0.729 \| good	4.489 \| good	0.153 \| good
2025-10-23T00:00:00.000Z	19 \| good	0.613 \| good	2.301 \| good	19.638 \| good	0.757 \| good	6.112 \| good	0.167 \| good
2025-10-23T01:00:00.000Z	16 \| good	0.746 \| good	3.049 \| good	17.427 \| good	0.806 \| good	7.82 \| good	0.183 \| good
2025-10-23T02:00:00.000Z	14 \| good	0.408 \| good	1.499 \| good	15.281 \| good	0.855 \| good	9.527 \| good	0.199 \| good
2025-10-23T03:00:00.000Z	13 \| good	1.349 \| good	5.716 \| good	14.213 \| good	0.904 \| good	11.234 \| good	0.214 \| good
2025-10-23T04:00:00.000Z	13 \| good	2.166 \| good	8.793 \| good	14.418 \| good	0.839 \| good	10.114 \| good	0.205 \| good
2025-10-23T05:00:00.000Z	13 \| good	1.209 \| good	4.617 \| good	14.117 \| good	0.775 \| good	8.994 \| good	0.196 \| good
2025-10-23T06:00:00.000Z	11 \| good	1.542 \| good	6.508 \| good	10.912 \| good	0.71 \| good	7.873 \| good	0.187 \| good
2025-10-23T07:00:00.000Z	10 \| good	1.064 \| good	3.983 \| good	10.679 \| good	0.658 \| good	6.77 \| good	0.176 \| good
2025-10-23T08:00:00.000Z	11 \| good	0.91 \| good	3.83 \| good	12.23 \| good	0.607 \| good	5.668 \| good	0.164 \| good
2025-10-23T09:00:00.000Z	13 \| good	1.034 \| good	3.923 \| good	13.765 \| good	0.555 \| good	4.565 \| good	0.152 \| good
2025-10-23T10:00:00.000Z	11 \| good	0.919 \| good	3.648 \| good	12.026 \| good	0.572 \| good	5.146 \| good	0.156 \| good
2025-10-23T11:00:00.000Z	9 \| good	1.103 \| good	4.261 \| good	10.08 \| good	0.59 \| good	5.726 \| good	0.159 \| good
2025-10-23T12:00:00.000Z	11 \| good	2.341 \| good	9.897 \| good	9.435 \| good	0.607 \| good	6.307 \| good	0.162 \| good
2025-10-23T13:00:00.000Z	16 \| good	3.173 \| good	13.874 \| good	11.558 \| good	0.716 \| good	5.714 \| good	0.166 \| good
2025-10-23T14:00:00.000Z	22 \| good	3.882 \| good	16.996 \| good	17.565 \| good	0.825 \| good	5.121 \| good	0.17 \| good
2025-10-23T15:00:00.000Z	21 \| good	3.172 \| good	13.853 \| good	22.747 \| good	0.935 \| good	4.528 \| good	0.174 \| good
2025-10-23T16:00:00.000Z	26 \| good	2.667 \| good	11 \| good	27.893 \| good	0.911 \| good	3.533 \| good	0.161 \| good
2025-10-23T17:00:00.000Z	30 \| good	1.76 \| good	7.058 \| good	31.636 \| good	0.888 \| good	2.537 \| good	0.148 \| good
2025-10-23T18:00:00.000Z	32 \| good	1.493 \| good	6.035 \| good	35.234 \| good	0.865 \| good	1.542 \| good	0.135 \| good
2025-10-23T19:00:00.000Z	34 \| good	2.966 \| good	12.071 \| good	37.096 \| good	0.841 \| good	1.506 \| good	0.134 \| good
2025-10-23T20:00:00.000Z	35 \| good	3.328 \| good	14.719 \| good	37.784 \| good	0.818 \| good	1.47 \| good	0.133 \| good
2025-10-23T21:00:00.000Z	35 \| good	1.959 \| good	7.946 \| good	37.569 \| good	0.795 \| good	1.434 \| good	0.132 \| good
2025-10-23T22:00:00.000Z	34 \| good	2.968 \| good	13.104 \| good	36.92 \| good	0.795 \| good	4.2 \| good	0.156 \| good
2025-10-23T23:00:00.000Z	30 \| good	4.253 \| good	18.204 \| good	31.803 \| good	0.795 \| good	6.967 \| good	0.18 \| good
2025-10-24T00:00:00.000Z	33 \| good	6.466 \| good	28.337 \| good	25.084 \| good	0.795 \| good	9.733 \| good	0.204 \| good
2025-10-24T01:00:00.000Z	33 \| good	6.008 \| good	26.306 \| good	21.317 \| good	0.852 \| good	12.456 \| good	0.228 \| good
2025-10-24T02:00:00.000Z	27 \| good	5.424 \| good	23.602 \| good	21.149 \| good	0.909 \| good	15.18 \| good	0.253 \| good
2025-10-24T03:00:00.000Z	33 \| good	6.368 \| good	28.477 \| good	20.691 \| good	0.966 \| good	17.904 \| good	0.277 \| good
2025-10-24T04:00:00.000Z	38 \| good	7.26 \| good	31.91 \| good	19.72 \| good	0.928 \| good	18.242 \| good	0.282 \| good
2025-10-24T05:00:00.000Z	38 \| good	6.806 \| good	30.008 \| good	19.412 \| good	0.89 \| good	18.58 \| good	0.288 \| good
2025-10-24T06:00:00.000Z	58 \| moderate	12.809 \| fine	12.965 \| good	9.209 \| good	0.842 \| good	18.888 \| good	0.293 \| good
2025-10-24T07:00:00.000Z	33 \| good	5.62 \| good	24.493 \| good	16.866 \| good	0.775 \| good	16.564 \| good	0.273 \| good
2025-10-24T08:00:00.000Z	27 \| good	4.976 \| good	21.309 \| good	16.659 \| good	0.698 \| good	14.211 \| good	0.252 \| good
2025-10-24T09:00:00.000Z	22 \| good	4.068 \| good	17.566 \| good	16.769 \| good	0.622 \| good	11.857 \| good	0.232 \| good
2025-10-24T10:00:00.000Z	16 \| good	3.41 \| good	15.076 \| good	15.15 \| good	0.599 \| good	11.023 \| good	0.223 \| good
2025-10-24T11:00:00.000Z	27 \| good	5.288 \| good	22.915 \| good	10.685 \| good	0.577 \| good	10.188 \| good	0.214 \| good

O'Fallon

Get reliable air quality data to drive your business

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

0.16ppm

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

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 12:00:00 on 2025-10-22.

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

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

The current air quality in O'fallon, Illinois is 21, categorized as Good 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 2.456 μg/m³.

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

The current PM₁₀ concentration at O'fallon, Illinois is 14.84 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 0.154 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 0.545 ppb.

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

The current ozone (O₃) concentration at O'fallon, Illinois is 22.993 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 3.685 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T12:00:00.000Z	16 \| good	3.033 \| good	7.854 \| good	14.716 \| good	0.574 \| good	16.603 \| good	0.263 \| good
2025-10-20T13:00:00.000Z	17 \| good	2.914 \| good	8.475 \| good	16.304 \| good	0.566 \| good	17.879 \| good	0.303 \| good
2025-10-20T14:00:00.000Z	16 \| good	3.425 \| good	13.896 \| good	15.807 \| good	0.689 \| good	13.623 \| good	0.345 \| good
2025-10-20T15:00:00.000Z	22 \| good	4.068 \| good	21.22 \| good	18.782 \| good	0.578 \| good	8.45 \| good	0.228 \| good
2025-10-20T16:00:00.000Z	28 \| good	3.41 \| good	29.916 \| good	21.527 \| good	0.53 \| good	6.235 \| good	0.228 \| good
2025-10-20T17:00:00.000Z	22 \| good	2.721 \| good	22.182 \| good	23.736 \| good	0.694 \| good	3.841 \| good	0.193 \| good
2025-10-20T18:00:00.000Z	29 \| good	3.213 \| good	20.395 \| good	31.203 \| good	0.872 \| good	3.858 \| good	0.19 \| good
2025-10-20T19:00:00.000Z	30 \| good	5.412 \| good	11.178 \| good	32.049 \| good	0.675 \| good	3.95 \| good	0.184 \| good
2025-10-20T20:00:00.000Z	33 \| good	6.428 \| good	29.45 \| good	31.508 \| good	0.661 \| good	3.862 \| good	0.235 \| good
2025-10-20T21:00:00.000Z	30 \| good	3.256 \| good	15.093 \| good	31.747 \| good	0.833 \| good	4.567 \| good	0.19 \| good
2025-10-20T22:00:00.000Z	34 \| good	6.155 \| good	13.654 \| good	37.012 \| good	0.916 \| good	4.397 \| good	0.19 \| good
2025-10-20T23:00:00.000Z	34 \| good	3.386 \| good	14.583 \| good	37.075 \| good	0.971 \| good	4.609 \| good	0.225 \| good
2025-10-21T00:00:00.000Z	38 \| good	3.558 \| good	15.214 \| good	41.415 \| good	0.922 \| good	4.929 \| good	0.235 \| good
2025-10-21T01:00:00.000Z	31 \| good	4.423 \| good	16.678 \| good	33.482 \| good	0.779 \| good	5.679 \| good	0.225 \| good
2025-10-21T02:00:00.000Z	32 \| good	3.878 \| good	16.891 \| good	34.659 \| good	0.809 \| good	5.576 \| good	0.19 \| good
2025-10-21T03:00:00.000Z	31 \| good	3.51 \| good	15.908 \| good	32.577 \| good	0.894 \| good	2.373 \| good	0.139 \| good
2025-10-21T04:00:00.000Z	33 \| good	3.87 \| good	20.386 \| good	35.691 \| good	0.862 \| good	4.189 \| good	0.239 \| good
2025-10-21T05:00:00.000Z	29 \| good	4.292 \| good	16.941 \| good	30.537 \| good	0.806 \| good	3.435 \| good	0.161 \| good
2025-10-21T06:00:00.000Z	31 \| good	4.33 \| good	21.479 \| good	33.236 \| good	0.982 \| good	3.866 \| good	0.163 \| good
2025-10-21T07:00:00.000Z	30 \| good	5.011 \| good	27.813 \| good	31.814 \| good	0.969 \| good	3.897 \| good	0.167 \| good
2025-10-21T08:00:00.000Z	28 \| good	3.709 \| good	19.054 \| good	30.3 \| good	0.964 \| good	3.93 \| good	0.167 \| good
2025-10-21T09:00:00.000Z	28 \| good	3.836 \| good	16.717 \| good	30.265 \| good	0.144 \| good	2.732 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	24 \| good	3.796 \| good	14.58 \| good	26.013 \| good	0.428 \| good	4.569 \| good	0.213 \| good
2025-10-21T11:00:00.000Z	22 \| good	3.717 \| good	16.733 \| good	21.937 \| good	0.464 \| good	6.227 \| good	0.192 \| good
2025-10-21T12:00:00.000Z	22 \| good	3.833 \| good	20.555 \| good	22.597 \| good	0.443 \| good	8.617 \| good	0.245 \| good
2025-10-21T13:00:00.000Z	24 \| good	3.828 \| good	19.096 \| good	26.002 \| good	0.443 \| good	8.729 \| good	0.273 \| good
2025-10-21T14:00:00.000Z	22 \| good	4.005 \| good	19.643 \| good	21.828 \| good	0.795 \| good	8.393 \| good	0.312 \| good
2025-10-21T15:00:00.000Z	22 \| good	4.097 \| good	17.152 \| good	24.374 \| good	2.58 \| good	6.251 \| good	0.229 \| good
2025-10-21T16:00:00.000Z	27 \| good	4.691 \| good	17.64 \| good	24.129 \| good	0.992 \| good	4.178 \| good	0.189 \| good
2025-10-21T17:00:00.000Z	27 \| good	5.041 \| good	13.929 \| good	27.461 \| good	0.633 \| good	3.003 \| good	0.189 \| good
2025-10-21T18:00:00.000Z	29 \| good	4.111 \| good	19.671 \| good	31.181 \| good	0.587 \| good	2.775 \| good	0.141 \| good
2025-10-21T19:00:00.000Z	30 \| good	3.464 \| good	13.151 \| good	32.249 \| good	0.559 \| good	3.045 \| good	0.202 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.592 \| good	20.144 \| good	33.546 \| good	0.543 \| good	2.921 \| good	0.206 \| good
2025-10-21T21:00:00.000Z	29 \| good	2.84 \| good	12.461 \| good	31.023 \| good	0.357 \| good	2.787 \| good	0.154 \| good
2025-10-21T22:00:00.000Z	31 \| good	2.694 \| good	20.031 \| good	34.026 \| good	0.414 \| good	2.855 \| good	0.106 \| good
2025-10-21T23:00:00.000Z	31 \| good	3.26 \| good	16.481 \| good	33.26 \| good	0.409 \| good	2.73 \| good	0.106 \| good
2025-10-22T00:00:00.000Z	32 \| good	2.926 \| good	10.841 \| good	35.389 \| good	0.459 \| good	3.875 \| good	0.106 \| good
2025-10-22T01:00:00.000Z	29 \| good	3.756 \| good	9.783 \| good	30.846 \| good	0.524 \| good	4.395 \| good	0.154 \| good
2025-10-22T02:00:00.000Z	29 \| good	3.026 \| good	17.577 \| good	30.915 \| good	0.51 \| good	5.606 \| good	0.189 \| good
2025-10-22T03:00:00.000Z	23 \| good	1.085 \| good	4.756 \| good	25.352 \| good	0.584 \| good	3.424 \| good	0.14 \| good
2025-10-22T04:00:00.000Z	27 \| good	1.886 \| good	8.813 \| good	28.73 \| good	0.528 \| good	5.735 \| good	0.189 \| good
2025-10-22T05:00:00.000Z	26 \| good	2.746 \| good	22.328 \| good	27.701 \| good	0.55 \| good	4.969 \| good	0.195 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.599 \| good	23.668 \| good	25.206 \| good	0.55 \| good	4.705 \| good	0.189 \| good
2025-10-22T07:00:00.000Z	23 \| good	2.6 \| good	21.548 \| good	25.066 \| good	0.55 \| good	4.698 \| good	0.189 \| good
2025-10-22T08:00:00.000Z	24 \| good	2.805 \| good	21.587 \| good	25.771 \| good	0.556 \| good	4.693 \| good	0.189 \| good
2025-10-22T09:00:00.000Z	22 \| good	2.789 \| good	16.571 \| good	23.768 \| good	0.625 \| good	1.83 \| good	0.168 \| good
2025-10-22T10:00:00.000Z	21 \| good	2.456 \| good	14.84 \| good	22.993 \| good	0.545 \| good	3.685 \| good	0.154 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.456 \| good	14.84 \| good	22.993 \| good	0.545 \| good	3.685 \| good	0.154 \| good
2025-10-22T12:00:00.000Z	22 \| good	4.246 \| good	18.937 \| good	20.596 \| good	0.599 \| good	2.773 \| good	0.123 \| good
2025-10-22T13:00:00.000Z	22 \| good	3.598 \| good	15.98 \| good	22.774 \| good	0.658 \| good	2.723 \| good	0.127 \| good
2025-10-22T14:00:00.000Z	24 \| good	3.228 \| good	14 \| good	26.356 \| good	0.717 \| good	2.672 \| good	0.131 \| good
2025-10-22T15:00:00.000Z	24 \| good	2.999 \| good	11.948 \| good	25.684 \| good	0.777 \| good	2.622 \| good	0.135 \| good
2025-10-22T16:00:00.000Z	25 \| good	1.924 \| good	7.776 \| good	26.619 \| good	0.775 \| good	2.223 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	28 \| good	1.003 \| good	3.841 \| good	29.758 \| good	0.772 \| good	1.823 \| good	0.128 \| good
2025-10-22T18:00:00.000Z	30 \| good	0.818 \| good	3.077 \| good	31.593 \| good	0.77 \| good	1.424 \| good	0.124 \| good
2025-10-22T19:00:00.000Z	31 \| good	2.23 \| good	9.447 \| good	33.723 \| good	0.738 \| good	1.364 \| good	0.124 \| good
2025-10-22T20:00:00.000Z	31 \| good	3.06 \| good	13.249 \| good	33.879 \| good	0.705 \| good	1.304 \| good	0.124 \| good
2025-10-22T21:00:00.000Z	28 \| good	2.125 \| good	8.649 \| good	30.141 \| good	0.673 \| good	1.244 \| good	0.125 \| good
2025-10-22T22:00:00.000Z	27 \| good	1.068 \| good	4.551 \| good	29.456 \| good	0.701 \| good	2.867 \| good	0.139 \| good
2025-10-22T23:00:00.000Z	21 \| good	0.755 \| good	2.809 \| good	23.443 \| good	0.729 \| good	4.489 \| good	0.153 \| good
2025-10-23T00:00:00.000Z	19 \| good	0.613 \| good	2.301 \| good	19.638 \| good	0.757 \| good	6.112 \| good	0.167 \| good
2025-10-23T01:00:00.000Z	16 \| good	0.746 \| good	3.049 \| good	17.427 \| good	0.806 \| good	7.82 \| good	0.183 \| good
2025-10-23T02:00:00.000Z	14 \| good	0.408 \| good	1.499 \| good	15.281 \| good	0.855 \| good	9.527 \| good	0.199 \| good
2025-10-23T03:00:00.000Z	13 \| good	1.349 \| good	5.716 \| good	14.213 \| good	0.904 \| good	11.234 \| good	0.214 \| good
2025-10-23T04:00:00.000Z	13 \| good	2.166 \| good	8.793 \| good	14.418 \| good	0.839 \| good	10.114 \| good	0.205 \| good
2025-10-23T05:00:00.000Z	13 \| good	1.209 \| good	4.617 \| good	14.117 \| good	0.775 \| good	8.994 \| good	0.196 \| good
2025-10-23T06:00:00.000Z	11 \| good	1.542 \| good	6.508 \| good	10.912 \| good	0.71 \| good	7.873 \| good	0.187 \| good
2025-10-23T07:00:00.000Z	10 \| good	1.064 \| good	3.983 \| good	10.679 \| good	0.658 \| good	6.77 \| good	0.176 \| good
2025-10-23T08:00:00.000Z	11 \| good	0.91 \| good	3.83 \| good	12.23 \| good	0.607 \| good	5.668 \| good	0.164 \| good
2025-10-23T09:00:00.000Z	13 \| good	1.034 \| good	3.923 \| good	13.765 \| good	0.555 \| good	4.565 \| good	0.152 \| good
2025-10-23T10:00:00.000Z	11 \| good	0.919 \| good	3.648 \| good	12.026 \| good	0.572 \| good	5.146 \| good	0.156 \| good
2025-10-23T11:00:00.000Z	9 \| good	1.103 \| good	4.261 \| good	10.08 \| good	0.59 \| good	5.726 \| good	0.159 \| good
2025-10-23T12:00:00.000Z	11 \| good	2.341 \| good	9.897 \| good	9.435 \| good	0.607 \| good	6.307 \| good	0.162 \| good
2025-10-23T13:00:00.000Z	16 \| good	3.173 \| good	13.874 \| good	11.558 \| good	0.716 \| good	5.714 \| good	0.166 \| good
2025-10-23T14:00:00.000Z	22 \| good	3.882 \| good	16.996 \| good	17.565 \| good	0.825 \| good	5.121 \| good	0.17 \| good
2025-10-23T15:00:00.000Z	21 \| good	3.172 \| good	13.853 \| good	22.747 \| good	0.935 \| good	4.528 \| good	0.174 \| good
2025-10-23T16:00:00.000Z	26 \| good	2.667 \| good	11 \| good	27.893 \| good	0.911 \| good	3.533 \| good	0.161 \| good
2025-10-23T17:00:00.000Z	30 \| good	1.76 \| good	7.058 \| good	31.636 \| good	0.888 \| good	2.537 \| good	0.148 \| good
2025-10-23T18:00:00.000Z	32 \| good	1.493 \| good	6.035 \| good	35.234 \| good	0.865 \| good	1.542 \| good	0.135 \| good
2025-10-23T19:00:00.000Z	34 \| good	2.966 \| good	12.071 \| good	37.096 \| good	0.841 \| good	1.506 \| good	0.134 \| good
2025-10-23T20:00:00.000Z	35 \| good	3.328 \| good	14.719 \| good	37.784 \| good	0.818 \| good	1.47 \| good	0.133 \| good
2025-10-23T21:00:00.000Z	35 \| good	1.959 \| good	7.946 \| good	37.569 \| good	0.795 \| good	1.434 \| good	0.132 \| good
2025-10-23T22:00:00.000Z	34 \| good	2.968 \| good	13.104 \| good	36.92 \| good	0.795 \| good	4.2 \| good	0.156 \| good
2025-10-23T23:00:00.000Z	30 \| good	4.253 \| good	18.204 \| good	31.803 \| good	0.795 \| good	6.967 \| good	0.18 \| good
2025-10-24T00:00:00.000Z	33 \| good	6.466 \| good	28.337 \| good	25.084 \| good	0.795 \| good	9.733 \| good	0.204 \| good
2025-10-24T01:00:00.000Z	33 \| good	6.008 \| good	26.306 \| good	21.317 \| good	0.852 \| good	12.456 \| good	0.228 \| good
2025-10-24T02:00:00.000Z	27 \| good	5.424 \| good	23.602 \| good	21.149 \| good	0.909 \| good	15.18 \| good	0.253 \| good
2025-10-24T03:00:00.000Z	33 \| good	6.368 \| good	28.477 \| good	20.691 \| good	0.966 \| good	17.904 \| good	0.277 \| good
2025-10-24T04:00:00.000Z	38 \| good	7.26 \| good	31.91 \| good	19.72 \| good	0.928 \| good	18.242 \| good	0.282 \| good
2025-10-24T05:00:00.000Z	38 \| good	6.806 \| good	30.008 \| good	19.412 \| good	0.89 \| good	18.58 \| good	0.288 \| good
2025-10-24T06:00:00.000Z	58 \| moderate	12.809 \| fine	12.965 \| good	9.209 \| good	0.842 \| good	18.888 \| good	0.293 \| good
2025-10-24T07:00:00.000Z	33 \| good	5.62 \| good	24.493 \| good	16.866 \| good	0.775 \| good	16.564 \| good	0.273 \| good
2025-10-24T08:00:00.000Z	27 \| good	4.976 \| good	21.309 \| good	16.659 \| good	0.698 \| good	14.211 \| good	0.252 \| good
2025-10-24T09:00:00.000Z	22 \| good	4.068 \| good	17.566 \| good	16.769 \| good	0.622 \| good	11.857 \| good	0.232 \| good
2025-10-24T10:00:00.000Z	16 \| good	3.41 \| good	15.076 \| good	15.15 \| good	0.599 \| good	11.023 \| good	0.223 \| good
2025-10-24T11:00:00.000Z	27 \| good	5.288 \| good	22.915 \| good	10.685 \| good	0.577 \| good	10.188 \| good	0.214 \| 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)

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

Get reliable air quality data to drive your business

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

Air quality in nearby cities