What are the current PM10 levels at O'fallon, Missouri?

The current PM10 levels in O'fallon, Missouri are 10.57 μg/m3.

What are the current sulfur dioxide (SO2) levels at O'fallon, Missouri?

The current sulfur dioxide (SO2) levels in O'fallon, Missouri are 0.613 ppb.

What are the current ozone (O3) levels at O'fallon, Missouri?

The current ozone (O3) levels at O'fallon, Missouri is 26.377 ppm.

What are the current nitrogen dioxide (NO2) levels at O'fallon, Missouri?

The current nitrogen dioxide (NO2) levels at O'fallon, Missouri is 4.373 ppb.

Real-time air quality index in O'Fallon, Missouri today

Q: What are the current PM2.5 levels in O'fallon, Missouri?

The measured PM2.5 levels in O'fallon, Missouri at present are 1.719 μg/m3.

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

Last updated: ... (Local time)

Common air pollutants in O'Fallon, Missouri

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

1.72 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

10.57 μg/m³

155

255

425

605+

Ozone (O₃)

26.38 ppb

201

201+

Sulfur Dioxide (SO₂)

0.61 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.37 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

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

Please contact us for custom requests

O'Fallon, Missouri

Scroll To Air Quality Map

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

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T17:00:00.000Z	20 \| good	1.839 \| good	10.984 \| good	22.458 \| good	0.79 \| good	4.026 \| good	0.198 \| good
2025-10-20T18:00:00.000Z	25 \| good	3.068 \| good	20.734 \| good	27.346 \| good	0.932 \| good	4.185 \| good	0.193 \| good
2025-10-20T19:00:00.000Z	32 \| good	2.221 \| good	9.066 \| good	34.523 \| good	0.795 \| good	4.166 \| good	0.192 \| good
2025-10-20T20:00:00.000Z	33 \| good	3.366 \| good	14.628 \| good	36.302 \| good	0.808 \| good	4.017 \| good	0.245 \| good
2025-10-20T21:00:00.000Z	35 \| good	6.238 \| good	22.845 \| good	37.669 \| good	0.991 \| good	4.569 \| good	0.198 \| good
2025-10-20T22:00:00.000Z	38 \| good	6.694 \| good	14.2 \| good	39.482 \| good	1.116 \| good	4.34 \| good	0.189 \| good
2025-10-20T23:00:00.000Z	36 \| good	5.825 \| good	25.632 \| good	38.682 \| good	1.19 \| good	4.442 \| good	0.236 \| good
2025-10-21T00:00:00.000Z	34 \| good	4.895 \| good	26.575 \| good	37.11 \| good	1.114 \| good	4.622 \| good	0.236 \| good
2025-10-21T01:00:00.000Z	33 \| good	3.357 \| good	15.799 \| good	36.431 \| good	0.975 \| good	5.409 \| good	0.236 \| good
2025-10-21T02:00:00.000Z	34 \| good	4.369 \| good	16.537 \| good	36.908 \| good	0.966 \| good	5.263 \| good	0.189 \| good
2025-10-21T03:00:00.000Z	28 \| good	5.026 \| good	21.961 \| good	30.185 \| good	0.724 \| good	2.36 \| good	0.143 \| good
2025-10-21T04:00:00.000Z	32 \| good	3.32 \| good	18.997 \| good	34.581 \| good	1.056 \| good	3.919 \| good	0.23 \| good
2025-10-21T05:00:00.000Z	31 \| good	3.556 \| good	20.785 \| good	33.77 \| good	0.944 \| good	3.315 \| good	0.153 \| good
2025-10-21T06:00:00.000Z	29 \| good	3.265 \| good	20.16 \| good	31.205 \| good	1.153 \| good	4.202 \| good	0.154 \| good
2025-10-21T07:00:00.000Z	32 \| good	2.669 \| good	9.615 \| good	34.909 \| good	1.148 \| good	4.202 \| good	0.148 \| good
2025-10-21T08:00:00.000Z	31 \| good	2.418 \| good	15.102 \| good	34.326 \| good	1.148 \| good	4.198 \| good	0.159 \| good
2025-10-21T09:00:00.000Z	29 \| good	2.813 \| good	9.209 \| good	31.492 \| good	0.183 \| good	4.495 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	24 \| good	2.395 \| good	11.094 \| good	25.834 \| good	0.564 \| good	4.781 \| good	0.19 \| good
2025-10-21T11:00:00.000Z	24 \| good	2.826 \| good	11.89 \| good	26.269 \| good	0.566 \| good	6.355 \| good	0.189 \| good
2025-10-21T12:00:00.000Z	22 \| good	2.733 \| good	13.239 \| good	24.375 \| good	0.54 \| good	7.97 \| good	0.237 \| good
2025-10-21T13:00:00.000Z	23 \| good	2.747 \| good	13.214 \| good	25.429 \| good	0.541 \| good	8.136 \| good	0.259 \| good
2025-10-21T14:00:00.000Z	22 \| good	3.687 \| good	21.087 \| good	22.088 \| good	0.765 \| good	7.558 \| good	0.3 \| good
2025-10-21T15:00:00.000Z	24 \| good	4.104 \| good	16.745 \| good	25.645 \| good	2.001 \| good	5.978 \| good	0.239 \| good
2025-10-21T16:00:00.000Z	27 \| good	4.432 \| good	16.116 \| good	29.215 \| good	0.932 \| good	4.445 \| good	0.187 \| good
2025-10-21T17:00:00.000Z	28 \| good	3.517 \| good	17.512 \| good	29.737 \| good	0.651 \| good	3.336 \| good	0.187 \| good
2025-10-21T18:00:00.000Z	29 \| good	4.067 \| good	19.932 \| good	30.863 \| good	0.602 \| good	3.403 \| good	0.152 \| good
2025-10-21T19:00:00.000Z	31 \| good	3.261 \| good	12.16 \| good	33.847 \| good	0.59 \| good	3.772 \| good	0.189 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.282 \| good	11.336 \| good	33.385 \| good	0.58 \| good	3.447 \| good	0.189 \| good
2025-10-21T21:00:00.000Z	31 \| good	2.814 \| good	15.751 \| good	32.687 \| good	0.466 \| good	3.488 \| good	0.141 \| good
2025-10-21T22:00:00.000Z	31 \| good	1.483 \| good	11.602 \| good	34.307 \| good	0.532 \| good	3.23 \| good	0.105 \| good
2025-10-21T23:00:00.000Z	31 \| good	1.869 \| good	7.844 \| good	33.216 \| good	0.53 \| good	3.03 \| good	0.105 \| good
2025-10-22T00:00:00.000Z	31 \| good	2.962 \| good	18.136 \| good	34.21 \| good	0.565 \| good	4.288 \| good	0.105 \| good
2025-10-22T01:00:00.000Z	30 \| good	2.197 \| good	20.04 \| good	31.984 \| good	0.628 \| good	4.709 \| good	0.141 \| good
2025-10-22T02:00:00.000Z	29 \| good	2.712 \| good	17.156 \| good	30.681 \| good	0.601 \| good	5.984 \| good	0.187 \| good
2025-10-22T03:00:00.000Z	22 \| good	2.59 \| good	10.004 \| good	24.452 \| good	0.363 \| good	2.153 \| good	0.132 \| good
2025-10-22T04:00:00.000Z	26 \| good	3.338 \| good	13.346 \| good	28.186 \| good	0.506 \| good	6.072 \| good	0.187 \| good
2025-10-22T05:00:00.000Z	25 \| good	3.033 \| good	13.888 \| good	26.975 \| good	0.54 \| good	5.268 \| good	0.193 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.955 \| good	15.197 \| good	25.137 \| good	0.536 \| good	4.958 \| good	0.187 \| good
2025-10-22T07:00:00.000Z	24 \| good	3.011 \| good	17.079 \| good	25.648 \| good	0.535 \| good	5.015 \| good	0.187 \| good
2025-10-22T08:00:00.000Z	23 \| good	2.825 \| good	21 \| good	25.019 \| good	0.535 \| good	5.095 \| good	0.187 \| good
2025-10-22T09:00:00.000Z	22 \| good	2.657 \| good	18.916 \| good	24.058 \| good	0.55 \| good	3.633 \| good	0.164 \| good
2025-10-22T10:00:00.000Z	21 \| good	1.733 \| good	12.799 \| good	23.488 \| good	0.519 \| good	3.96 \| good	0.141 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.629 \| good	13.966 \| good	23.349 \| good	0.505 \| good	4.678 \| good	0.187 \| good
2025-10-22T12:00:00.000Z	20 \| good	2.734 \| good	13.917 \| good	21.918 \| good	0.47 \| good	6.768 \| good	0.234 \| good
2025-10-22T13:00:00.000Z	21 \| good	2.969 \| good	13.932 \| good	22.966 \| good	0.443 \| good	8.083 \| good	0.28 \| good
2025-10-22T14:00:00.000Z	21 \| good	2.192 \| good	17.947 \| good	22.876 \| good	0.715 \| good	7.34 \| good	0.299 \| good
2025-10-22T15:00:00.000Z	22 \| good	3.044 \| good	11.766 \| good	23.883 \| good	0.602 \| good	5.255 \| good	0.234 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.708 \| good	10.132 \| good	26.47 \| good	0.587 \| good	4.423 \| good	0.187 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.719 \| good	10.57 \| good	26.377 \| good	0.613 \| good	4.373 \| good	0.186 \| good
2025-10-22T17:00:00.000Z	31 \| good	0.866 \| good	3.017 \| good	33.998 \| good	0.46 \| good	1.162 \| good	0.138 \| good
2025-10-22T18:00:00.000Z	32 \| good	0.37 \| good	1.005 \| good	34.737 \| good	0.45 \| good	0.821 \| good	0.133 \| good
2025-10-22T19:00:00.000Z	31 \| good	1.319 \| good	5.009 \| good	33.902 \| good	0.446 \| good	0.813 \| good	0.134 \| good
2025-10-22T20:00:00.000Z	31 \| good	1.13 \| good	4.984 \| good	32.621 \| good	0.442 \| good	0.805 \| good	0.135 \| good
2025-10-22T21:00:00.000Z	27 \| good	0.69 \| good	2.022 \| good	29.366 \| good	0.437 \| good	0.796 \| good	0.137 \| good
2025-10-22T22:00:00.000Z	27 \| good	0.66 \| good	2.015 \| good	28.88 \| good	0.472 \| good	2.489 \| good	0.153 \| good
2025-10-22T23:00:00.000Z	24 \| good	0.325 \| good	1.03 \| good	26.307 \| good	0.507 \| good	4.181 \| good	0.169 \| good
2025-10-23T00:00:00.000Z	24 \| good	1.527 \| good	5.995 \| good	26.148 \| good	0.542 \| good	5.873 \| good	0.186 \| good
2025-10-23T01:00:00.000Z	24 \| good	1.513 \| good	5.995 \| good	26.494 \| good	0.608 \| good	7.764 \| good	0.204 \| good
2025-10-23T02:00:00.000Z	24 \| good	1.645 \| good	6.949 \| good	25.879 \| good	0.674 \| good	9.655 \| good	0.221 \| good
2025-10-23T03:00:00.000Z	21 \| good	1.833 \| good	7.944 \| good	23.482 \| good	0.74 \| good	11.546 \| good	0.239 \| good
2025-10-23T04:00:00.000Z	21 \| good	1.743 \| good	6.97 \| good	22.583 \| good	0.71 \| good	11.317 \| good	0.238 \| good
2025-10-23T05:00:00.000Z	17 \| good	1.647 \| good	7.015 \| good	18.185 \| good	0.68 \| good	11.088 \| good	0.238 \| good
2025-10-23T06:00:00.000Z	12 \| good	1.901 \| good	8.03 \| good	13.195 \| good	0.65 \| good	10.859 \| good	0.237 \| good
2025-10-23T07:00:00.000Z	11 \| good	1.53 \| good	6.056 \| good	11.029 \| good	0.633 \| good	9.326 \| good	0.22 \| good
2025-10-23T08:00:00.000Z	10 \| good	1.318 \| good	5.048 \| good	11.386 \| good	0.615 \| good	7.794 \| good	0.203 \| good
2025-10-23T09:00:00.000Z	11 \| good	0.884 \| good	3.046 \| good	11.666 \| good	0.598 \| good	6.261 \| good	0.186 \| good
2025-10-23T10:00:00.000Z	10 \| good	1.096 \| good	4.046 \| good	10.538 \| good	0.626 \| good	6.855 \| good	0.189 \| good
2025-10-23T11:00:00.000Z	16 \| good	2.743 \| good	11.022 \| good	8.607 \| good	0.653 \| good	7.449 \| good	0.191 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.703 \| good	11.01 \| good	7.086 \| good	0.681 \| good	8.043 \| good	0.193 \| good
2025-10-23T13:00:00.000Z	22 \| good	3.524 \| good	15.985 \| good	7.187 \| good	0.725 \| good	6.854 \| good	0.191 \| good
2025-10-23T14:00:00.000Z	22 \| good	4.114 \| good	18.002 \| good	12.657 \| good	0.769 \| good	5.664 \| good	0.19 \| good
2025-10-23T15:00:00.000Z	19 \| good	2.952 \| good	12.05 \| good	20.276 \| good	0.814 \| good	4.475 \| good	0.188 \| good
2025-10-23T16:00:00.000Z	25 \| good	1.691 \| good	6.998 \| good	27.351 \| good	0.733 \| good	3.279 \| good	0.172 \| good
2025-10-23T17:00:00.000Z	29 \| good	1.04 \| good	4 \| good	30.652 \| good	0.653 \| good	2.083 \| good	0.156 \| good
2025-10-23T18:00:00.000Z	31 \| good	0.911 \| good	3.986 \| good	32.724 \| good	0.572 \| good	0.887 \| good	0.139 \| good
2025-10-23T19:00:00.000Z	31 \| good	2.018 \| good	8 \| good	34.305 \| good	0.539 \| good	0.874 \| good	0.138 \| good
2025-10-23T20:00:00.000Z	31 \| good	2.394 \| good	9.962 \| good	34.212 \| good	0.505 \| good	0.861 \| good	0.136 \| good
2025-10-23T21:00:00.000Z	29 \| good	2.073 \| good	8 \| good	30.895 \| good	0.471 \| good	0.849 \| good	0.135 \| good
2025-10-23T22:00:00.000Z	27 \| good	4.001 \| good	17.926 \| good	28.66 \| good	0.501 \| good	3.715 \| good	0.162 \| good
2025-10-23T23:00:00.000Z	27 \| good	5.043 \| good	21.958 \| good	27.402 \| good	0.53 \| good	6.581 \| good	0.188 \| good
2025-10-24T00:00:00.000Z	24 \| good	4.336 \| good	19.003 \| good	25.918 \| good	0.559 \| good	9.447 \| good	0.215 \| good
2025-10-24T01:00:00.000Z	25 \| good	1.909 \| good	8.051 \| good	27.115 \| good	0.645 \| good	11.435 \| good	0.233 \| good
2025-10-24T02:00:00.000Z	24 \| good	0.685 \| good	2.147 \| good	26.173 \| good	0.731 \| good	13.423 \| good	0.25 \| good
2025-10-24T03:00:00.000Z	23 \| good	1.844 \| good	8.017 \| good	25.025 \| good	0.817 \| good	15.411 \| good	0.268 \| good
2025-10-24T04:00:00.000Z	20 \| good	1.734 \| good	7.018 \| good	21.664 \| good	0.757 \| good	13.673 \| good	0.251 \| good
2025-10-24T05:00:00.000Z	17 \| good	1.765 \| good	7.035 \| good	18.44 \| good	0.698 \| good	11.936 \| good	0.234 \| good
2025-10-24T06:00:00.000Z	15 \| good	2.16 \| good	8.997 \| good	15.712 \| good	0.639 \| good	10.199 \| good	0.217 \| good
2025-10-24T07:00:00.000Z	16 \| good	2.538 \| good	10.031 \| good	14.852 \| good	0.603 \| good	8.976 \| good	0.205 \| good
2025-10-24T08:00:00.000Z	16 \| good	2.917 \| good	12.001 \| good	15.081 \| good	0.567 \| good	7.754 \| good	0.192 \| good
2025-10-24T09:00:00.000Z	16 \| good	2.688 \| good	11.003 \| good	15.241 \| good	0.532 \| good	6.531 \| good	0.179 \| good
2025-10-24T10:00:00.000Z	22 \| good	4.114 \| good	17.977 \| good	12.433 \| good	0.568 \| good	6.678 \| good	0.178 \| good
2025-10-24T11:00:00.000Z	44 \| good	8.041 \| good	34.934 \| good	5.835 \| good	0.604 \| good	6.824 \| good	0.177 \| good
2025-10-24T12:00:00.000Z	54 \| moderate	11.351 \| good	49.873 \| good	0.888 \| good	0.64 \| good	6.97 \| good	0.176 \| good
2025-10-24T13:00:00.000Z	62 \| moderate	14.675 \| fine	64.824 \| fine	3.478 \| good	0.78 \| good	7.262 \| good	0.186 \| good
2025-10-24T14:00:00.000Z	60 \| moderate	13.62 \| fine	60.851 \| fine	8.762 \| good	0.92 \| good	7.554 \| good	0.196 \| good
2025-10-24T15:00:00.000Z	54 \| moderate	11.109 \| good	48.893 \| good	15.371 \| good	1.061 \| good	7.846 \| good	0.207 \| good
2025-10-24T16:00:00.000Z	49 \| good	9.463 \| good	41.885 \| good	21.096 \| good	1.207 \| good	6.569 \| good	0.19 \| good

O'Fallon

Empower business decisions with accurate air quality data

O'Fallon, Missouri air quality map: Real-time AQI near you

0.25ppm

How accurate is Missouri, USA air quality data?

Air quality measurements for Missouri, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

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 frequently is the air quality data for O'fallon, Missouri updated?

Air quality data for O'fallon, Missouri is updated on an hourly basis.

When did O'fallon, Missouri experience the worst air quality in the last 24 hours?

The worst air quality in O'fallon, Missouri was recorded at 12:00:00 on 2025-10-22.

When did O'fallon, Missouri have its best air quality in the last 24 hours?

The best air quality in O'fallon, Missouri was recorded at 12:00:00 on 2025-10-22.

What is the real-time air quality index for O'fallon, Missouri?

The real-time air quality index in O'fallon, Missouri is 24, currently categorized as Good.

Which pollutant is found most often in O'fallon, Missouri?

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

What can I do if the air quality in O'fallon, Missouri is poor?

If the air quality in O'fallon, Missouri is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in O'fallon, Missouri?

The measured PM_2.5 levels in O'fallon, Missouri at present are 1.719 μg/m³.

What are the current PM₁₀ levels at O'fallon, Missouri?

The current PM₁₀ levels in O'fallon, Missouri are 10.57 μg/m³.

What are the current carbon monoxide (CO) levels at O'fallon, Missouri?

The current carbon monoxide (CO) level in O'fallon, Missouri is 0.186 ppm.

What are the current sulfur dioxide (SO₂) levels at O'fallon, Missouri?

The current sulfur dioxide (SO₂) levels in O'fallon, Missouri are 0.613 ppb.

What are the current ozone (O₃) levels at O'fallon, Missouri?

The current ozone (O₃) levels at O'fallon, Missouri is 26.377 ppm.

What are the current nitrogen dioxide (NO₂) levels at O'fallon, Missouri?

The current nitrogen dioxide (NO₂) levels at O'fallon, Missouri is 4.373 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T17:00:00.000Z	20 \| good	1.839 \| good	10.984 \| good	22.458 \| good	0.79 \| good	4.026 \| good	0.198 \| good
2025-10-20T18:00:00.000Z	25 \| good	3.068 \| good	20.734 \| good	27.346 \| good	0.932 \| good	4.185 \| good	0.193 \| good
2025-10-20T19:00:00.000Z	32 \| good	2.221 \| good	9.066 \| good	34.523 \| good	0.795 \| good	4.166 \| good	0.192 \| good
2025-10-20T20:00:00.000Z	33 \| good	3.366 \| good	14.628 \| good	36.302 \| good	0.808 \| good	4.017 \| good	0.245 \| good
2025-10-20T21:00:00.000Z	35 \| good	6.238 \| good	22.845 \| good	37.669 \| good	0.991 \| good	4.569 \| good	0.198 \| good
2025-10-20T22:00:00.000Z	38 \| good	6.694 \| good	14.2 \| good	39.482 \| good	1.116 \| good	4.34 \| good	0.189 \| good
2025-10-20T23:00:00.000Z	36 \| good	5.825 \| good	25.632 \| good	38.682 \| good	1.19 \| good	4.442 \| good	0.236 \| good
2025-10-21T00:00:00.000Z	34 \| good	4.895 \| good	26.575 \| good	37.11 \| good	1.114 \| good	4.622 \| good	0.236 \| good
2025-10-21T01:00:00.000Z	33 \| good	3.357 \| good	15.799 \| good	36.431 \| good	0.975 \| good	5.409 \| good	0.236 \| good
2025-10-21T02:00:00.000Z	34 \| good	4.369 \| good	16.537 \| good	36.908 \| good	0.966 \| good	5.263 \| good	0.189 \| good
2025-10-21T03:00:00.000Z	28 \| good	5.026 \| good	21.961 \| good	30.185 \| good	0.724 \| good	2.36 \| good	0.143 \| good
2025-10-21T04:00:00.000Z	32 \| good	3.32 \| good	18.997 \| good	34.581 \| good	1.056 \| good	3.919 \| good	0.23 \| good
2025-10-21T05:00:00.000Z	31 \| good	3.556 \| good	20.785 \| good	33.77 \| good	0.944 \| good	3.315 \| good	0.153 \| good
2025-10-21T06:00:00.000Z	29 \| good	3.265 \| good	20.16 \| good	31.205 \| good	1.153 \| good	4.202 \| good	0.154 \| good
2025-10-21T07:00:00.000Z	32 \| good	2.669 \| good	9.615 \| good	34.909 \| good	1.148 \| good	4.202 \| good	0.148 \| good
2025-10-21T08:00:00.000Z	31 \| good	2.418 \| good	15.102 \| good	34.326 \| good	1.148 \| good	4.198 \| good	0.159 \| good
2025-10-21T09:00:00.000Z	29 \| good	2.813 \| good	9.209 \| good	31.492 \| good	0.183 \| good	4.495 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	24 \| good	2.395 \| good	11.094 \| good	25.834 \| good	0.564 \| good	4.781 \| good	0.19 \| good
2025-10-21T11:00:00.000Z	24 \| good	2.826 \| good	11.89 \| good	26.269 \| good	0.566 \| good	6.355 \| good	0.189 \| good
2025-10-21T12:00:00.000Z	22 \| good	2.733 \| good	13.239 \| good	24.375 \| good	0.54 \| good	7.97 \| good	0.237 \| good
2025-10-21T13:00:00.000Z	23 \| good	2.747 \| good	13.214 \| good	25.429 \| good	0.541 \| good	8.136 \| good	0.259 \| good
2025-10-21T14:00:00.000Z	22 \| good	3.687 \| good	21.087 \| good	22.088 \| good	0.765 \| good	7.558 \| good	0.3 \| good
2025-10-21T15:00:00.000Z	24 \| good	4.104 \| good	16.745 \| good	25.645 \| good	2.001 \| good	5.978 \| good	0.239 \| good
2025-10-21T16:00:00.000Z	27 \| good	4.432 \| good	16.116 \| good	29.215 \| good	0.932 \| good	4.445 \| good	0.187 \| good
2025-10-21T17:00:00.000Z	28 \| good	3.517 \| good	17.512 \| good	29.737 \| good	0.651 \| good	3.336 \| good	0.187 \| good
2025-10-21T18:00:00.000Z	29 \| good	4.067 \| good	19.932 \| good	30.863 \| good	0.602 \| good	3.403 \| good	0.152 \| good
2025-10-21T19:00:00.000Z	31 \| good	3.261 \| good	12.16 \| good	33.847 \| good	0.59 \| good	3.772 \| good	0.189 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.282 \| good	11.336 \| good	33.385 \| good	0.58 \| good	3.447 \| good	0.189 \| good
2025-10-21T21:00:00.000Z	31 \| good	2.814 \| good	15.751 \| good	32.687 \| good	0.466 \| good	3.488 \| good	0.141 \| good
2025-10-21T22:00:00.000Z	31 \| good	1.483 \| good	11.602 \| good	34.307 \| good	0.532 \| good	3.23 \| good	0.105 \| good
2025-10-21T23:00:00.000Z	31 \| good	1.869 \| good	7.844 \| good	33.216 \| good	0.53 \| good	3.03 \| good	0.105 \| good
2025-10-22T00:00:00.000Z	31 \| good	2.962 \| good	18.136 \| good	34.21 \| good	0.565 \| good	4.288 \| good	0.105 \| good
2025-10-22T01:00:00.000Z	30 \| good	2.197 \| good	20.04 \| good	31.984 \| good	0.628 \| good	4.709 \| good	0.141 \| good
2025-10-22T02:00:00.000Z	29 \| good	2.712 \| good	17.156 \| good	30.681 \| good	0.601 \| good	5.984 \| good	0.187 \| good
2025-10-22T03:00:00.000Z	22 \| good	2.59 \| good	10.004 \| good	24.452 \| good	0.363 \| good	2.153 \| good	0.132 \| good
2025-10-22T04:00:00.000Z	26 \| good	3.338 \| good	13.346 \| good	28.186 \| good	0.506 \| good	6.072 \| good	0.187 \| good
2025-10-22T05:00:00.000Z	25 \| good	3.033 \| good	13.888 \| good	26.975 \| good	0.54 \| good	5.268 \| good	0.193 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.955 \| good	15.197 \| good	25.137 \| good	0.536 \| good	4.958 \| good	0.187 \| good
2025-10-22T07:00:00.000Z	24 \| good	3.011 \| good	17.079 \| good	25.648 \| good	0.535 \| good	5.015 \| good	0.187 \| good
2025-10-22T08:00:00.000Z	23 \| good	2.825 \| good	21 \| good	25.019 \| good	0.535 \| good	5.095 \| good	0.187 \| good
2025-10-22T09:00:00.000Z	22 \| good	2.657 \| good	18.916 \| good	24.058 \| good	0.55 \| good	3.633 \| good	0.164 \| good
2025-10-22T10:00:00.000Z	21 \| good	1.733 \| good	12.799 \| good	23.488 \| good	0.519 \| good	3.96 \| good	0.141 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.629 \| good	13.966 \| good	23.349 \| good	0.505 \| good	4.678 \| good	0.187 \| good
2025-10-22T12:00:00.000Z	20 \| good	2.734 \| good	13.917 \| good	21.918 \| good	0.47 \| good	6.768 \| good	0.234 \| good
2025-10-22T13:00:00.000Z	21 \| good	2.969 \| good	13.932 \| good	22.966 \| good	0.443 \| good	8.083 \| good	0.28 \| good
2025-10-22T14:00:00.000Z	21 \| good	2.192 \| good	17.947 \| good	22.876 \| good	0.715 \| good	7.34 \| good	0.299 \| good
2025-10-22T15:00:00.000Z	22 \| good	3.044 \| good	11.766 \| good	23.883 \| good	0.602 \| good	5.255 \| good	0.234 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.708 \| good	10.132 \| good	26.47 \| good	0.587 \| good	4.423 \| good	0.187 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.719 \| good	10.57 \| good	26.377 \| good	0.613 \| good	4.373 \| good	0.186 \| good
2025-10-22T17:00:00.000Z	31 \| good	0.866 \| good	3.017 \| good	33.998 \| good	0.46 \| good	1.162 \| good	0.138 \| good
2025-10-22T18:00:00.000Z	32 \| good	0.37 \| good	1.005 \| good	34.737 \| good	0.45 \| good	0.821 \| good	0.133 \| good
2025-10-22T19:00:00.000Z	31 \| good	1.319 \| good	5.009 \| good	33.902 \| good	0.446 \| good	0.813 \| good	0.134 \| good
2025-10-22T20:00:00.000Z	31 \| good	1.13 \| good	4.984 \| good	32.621 \| good	0.442 \| good	0.805 \| good	0.135 \| good
2025-10-22T21:00:00.000Z	27 \| good	0.69 \| good	2.022 \| good	29.366 \| good	0.437 \| good	0.796 \| good	0.137 \| good
2025-10-22T22:00:00.000Z	27 \| good	0.66 \| good	2.015 \| good	28.88 \| good	0.472 \| good	2.489 \| good	0.153 \| good
2025-10-22T23:00:00.000Z	24 \| good	0.325 \| good	1.03 \| good	26.307 \| good	0.507 \| good	4.181 \| good	0.169 \| good
2025-10-23T00:00:00.000Z	24 \| good	1.527 \| good	5.995 \| good	26.148 \| good	0.542 \| good	5.873 \| good	0.186 \| good
2025-10-23T01:00:00.000Z	24 \| good	1.513 \| good	5.995 \| good	26.494 \| good	0.608 \| good	7.764 \| good	0.204 \| good
2025-10-23T02:00:00.000Z	24 \| good	1.645 \| good	6.949 \| good	25.879 \| good	0.674 \| good	9.655 \| good	0.221 \| good
2025-10-23T03:00:00.000Z	21 \| good	1.833 \| good	7.944 \| good	23.482 \| good	0.74 \| good	11.546 \| good	0.239 \| good
2025-10-23T04:00:00.000Z	21 \| good	1.743 \| good	6.97 \| good	22.583 \| good	0.71 \| good	11.317 \| good	0.238 \| good
2025-10-23T05:00:00.000Z	17 \| good	1.647 \| good	7.015 \| good	18.185 \| good	0.68 \| good	11.088 \| good	0.238 \| good
2025-10-23T06:00:00.000Z	12 \| good	1.901 \| good	8.03 \| good	13.195 \| good	0.65 \| good	10.859 \| good	0.237 \| good
2025-10-23T07:00:00.000Z	11 \| good	1.53 \| good	6.056 \| good	11.029 \| good	0.633 \| good	9.326 \| good	0.22 \| good
2025-10-23T08:00:00.000Z	10 \| good	1.318 \| good	5.048 \| good	11.386 \| good	0.615 \| good	7.794 \| good	0.203 \| good
2025-10-23T09:00:00.000Z	11 \| good	0.884 \| good	3.046 \| good	11.666 \| good	0.598 \| good	6.261 \| good	0.186 \| good
2025-10-23T10:00:00.000Z	10 \| good	1.096 \| good	4.046 \| good	10.538 \| good	0.626 \| good	6.855 \| good	0.189 \| good
2025-10-23T11:00:00.000Z	16 \| good	2.743 \| good	11.022 \| good	8.607 \| good	0.653 \| good	7.449 \| good	0.191 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.703 \| good	11.01 \| good	7.086 \| good	0.681 \| good	8.043 \| good	0.193 \| good
2025-10-23T13:00:00.000Z	22 \| good	3.524 \| good	15.985 \| good	7.187 \| good	0.725 \| good	6.854 \| good	0.191 \| good
2025-10-23T14:00:00.000Z	22 \| good	4.114 \| good	18.002 \| good	12.657 \| good	0.769 \| good	5.664 \| good	0.19 \| good
2025-10-23T15:00:00.000Z	19 \| good	2.952 \| good	12.05 \| good	20.276 \| good	0.814 \| good	4.475 \| good	0.188 \| good
2025-10-23T16:00:00.000Z	25 \| good	1.691 \| good	6.998 \| good	27.351 \| good	0.733 \| good	3.279 \| good	0.172 \| good
2025-10-23T17:00:00.000Z	29 \| good	1.04 \| good	4 \| good	30.652 \| good	0.653 \| good	2.083 \| good	0.156 \| good
2025-10-23T18:00:00.000Z	31 \| good	0.911 \| good	3.986 \| good	32.724 \| good	0.572 \| good	0.887 \| good	0.139 \| good
2025-10-23T19:00:00.000Z	31 \| good	2.018 \| good	8 \| good	34.305 \| good	0.539 \| good	0.874 \| good	0.138 \| good
2025-10-23T20:00:00.000Z	31 \| good	2.394 \| good	9.962 \| good	34.212 \| good	0.505 \| good	0.861 \| good	0.136 \| good
2025-10-23T21:00:00.000Z	29 \| good	2.073 \| good	8 \| good	30.895 \| good	0.471 \| good	0.849 \| good	0.135 \| good
2025-10-23T22:00:00.000Z	27 \| good	4.001 \| good	17.926 \| good	28.66 \| good	0.501 \| good	3.715 \| good	0.162 \| good
2025-10-23T23:00:00.000Z	27 \| good	5.043 \| good	21.958 \| good	27.402 \| good	0.53 \| good	6.581 \| good	0.188 \| good
2025-10-24T00:00:00.000Z	24 \| good	4.336 \| good	19.003 \| good	25.918 \| good	0.559 \| good	9.447 \| good	0.215 \| good
2025-10-24T01:00:00.000Z	25 \| good	1.909 \| good	8.051 \| good	27.115 \| good	0.645 \| good	11.435 \| good	0.233 \| good
2025-10-24T02:00:00.000Z	24 \| good	0.685 \| good	2.147 \| good	26.173 \| good	0.731 \| good	13.423 \| good	0.25 \| good
2025-10-24T03:00:00.000Z	23 \| good	1.844 \| good	8.017 \| good	25.025 \| good	0.817 \| good	15.411 \| good	0.268 \| good
2025-10-24T04:00:00.000Z	20 \| good	1.734 \| good	7.018 \| good	21.664 \| good	0.757 \| good	13.673 \| good	0.251 \| good
2025-10-24T05:00:00.000Z	17 \| good	1.765 \| good	7.035 \| good	18.44 \| good	0.698 \| good	11.936 \| good	0.234 \| good
2025-10-24T06:00:00.000Z	15 \| good	2.16 \| good	8.997 \| good	15.712 \| good	0.639 \| good	10.199 \| good	0.217 \| good
2025-10-24T07:00:00.000Z	16 \| good	2.538 \| good	10.031 \| good	14.852 \| good	0.603 \| good	8.976 \| good	0.205 \| good
2025-10-24T08:00:00.000Z	16 \| good	2.917 \| good	12.001 \| good	15.081 \| good	0.567 \| good	7.754 \| good	0.192 \| good
2025-10-24T09:00:00.000Z	16 \| good	2.688 \| good	11.003 \| good	15.241 \| good	0.532 \| good	6.531 \| good	0.179 \| good
2025-10-24T10:00:00.000Z	22 \| good	4.114 \| good	17.977 \| good	12.433 \| good	0.568 \| good	6.678 \| good	0.178 \| good
2025-10-24T11:00:00.000Z	44 \| good	8.041 \| good	34.934 \| good	5.835 \| good	0.604 \| good	6.824 \| good	0.177 \| good
2025-10-24T12:00:00.000Z	54 \| moderate	11.351 \| good	49.873 \| good	0.888 \| good	0.64 \| good	6.97 \| good	0.176 \| good
2025-10-24T13:00:00.000Z	62 \| moderate	14.675 \| fine	64.824 \| fine	3.478 \| good	0.78 \| good	7.262 \| good	0.186 \| good
2025-10-24T14:00:00.000Z	60 \| moderate	13.62 \| fine	60.851 \| fine	8.762 \| good	0.92 \| good	7.554 \| good	0.196 \| good
2025-10-24T15:00:00.000Z	54 \| moderate	11.109 \| good	48.893 \| good	15.371 \| good	1.061 \| good	7.846 \| good	0.207 \| good
2025-10-24T16:00:00.000Z	49 \| good	9.463 \| good	41.885 \| good	21.096 \| good	1.207 \| good	6.569 \| good	0.19 \| good

Real-time air quality index in O'Fallon, Missouri today

Common air pollutants in O'Fallon, Missouri

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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

Empower business decisions with accurate air quality data

O'Fallon, Missouri air quality map: Real-time AQI near you

Air quality in nearby cities

O'Fallon, Missouri

Dardenne Prairie, Missouri

St. Peters, Missouri

Lake St. Louis, Missouri

Wentzville, Missouri

St. Charles, Missouri

How accurate is Missouri, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for O'fallon, Missouri updated?

When did O'fallon, Missouri experience the worst air quality in the last 24 hours?

When did O'fallon, Missouri have its best air quality in the last 24 hours?

What is the real-time air quality index for O'fallon, Missouri?

Which pollutant is found most often in O'fallon, Missouri?

What can I do if the air quality in O'fallon, Missouri is poor?

What are the current PM2.5 levels in O'fallon, Missouri?

What are the current PM10 levels at O'fallon, Missouri?

What are the current carbon monoxide (CO) levels at O'fallon, Missouri?

What are the current sulfur dioxide (SO2) levels at O'fallon, Missouri?

What are the current ozone (O3) levels at O'fallon, Missouri?

What are the current nitrogen dioxide (NO2) levels at O'fallon, Missouri?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in O'fallon, Missouri?

What are the current PM₁₀ levels at O'fallon, Missouri?

What are the current sulfur dioxide (SO₂) levels at O'fallon, Missouri?

What are the current ozone (O₃) levels at O'fallon, Missouri?

What are the current nitrogen dioxide (NO₂) levels at O'fallon, Missouri?