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

The current PM10 levels in O'fallon, Missouri are 39.904 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 0.436 ppb.

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

The current ozone (O3) levels at O'fallon, Missouri is 39.009 ppm.

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

The current nitrogen dioxide (NO2) levels at O'fallon, Missouri is 9.71 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 8.048 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)

7.21 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

24.71 μg/m³

155

255

425

605+

Ozone (O₃)

37.33 ppb

201

201+

Sulfur Dioxide (SO₂)

0.56 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.46 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

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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
2026-04-22T07:00:00.000Z	42 \| good	4.891 \| good	17.961 \| good	45.403 \| good	1.041 \| good	4.367 \| good	0.193 \| good
2026-04-22T08:00:00.000Z	39 \| good	5.644 \| good	18.109 \| good	41.592 \| good	1.031 \| good	4.666 \| good	0.193 \| good
2026-04-22T09:00:00.000Z	32 \| good	5.083 \| good	21.713 \| good	34.865 \| good	0.681 \| good	4.981 \| good	0.193 \| good
2026-04-22T10:00:00.000Z	39 \| good	4.48 \| good	16.301 \| good	42.292 \| good	1.153 \| good	4.963 \| good	0.193 \| good
2026-04-22T11:00:00.000Z	36 \| good	4.88 \| good	19.184 \| good	38.827 \| good	0.855 \| good	7.788 \| good	0.193 \| good
2026-04-22T12:00:00.000Z	31 \| good	5.412 \| good	17.875 \| good	34.372 \| good	0.51 \| good	11.611 \| good	0.238 \| good
2026-04-22T13:00:00.000Z	33 \| good	5.924 \| good	21.876 \| good	33.834 \| good	0.791 \| good	12.751 \| good	0.273 \| good
2026-04-22T14:00:00.000Z	38 \| good	5.309 \| good	18.735 \| good	40.75 \| good	1.126 \| good	7.722 \| good	0.251 \| good
2026-04-22T15:00:00.000Z	38 \| good	4.043 \| good	21.504 \| good	41.004 \| good	1.033 \| good	7.185 \| good	0.238 \| good
2026-04-22T16:00:00.000Z	38 \| good	3.44 \| good	18.843 \| good	40.802 \| good	3.145 \| good	7.406 \| good	0.228 \| good
2026-04-22T17:00:00.000Z	42 \| good	3.487 \| good	15.591 \| good	44.893 \| good	3.031 \| good	7.433 \| good	0.198 \| good
2026-04-22T18:00:00.000Z	41 \| good	3.927 \| good	13.646 \| good	44.387 \| good	2.793 \| good	7.584 \| good	0.205 \| good
2026-04-22T19:00:00.000Z	40 \| good	4.942 \| good	20.088 \| good	42.554 \| good	3.94 \| good	9.007 \| good	0.205 \| good
2026-04-22T20:00:00.000Z	38 \| good	3.855 \| good	14.92 \| good	41.189 \| good	4.354 \| good	8.014 \| good	0.238 \| good
2026-04-22T21:00:00.000Z	39 \| good	4.036 \| good	17.553 \| good	41.91 \| good	4.047 \| good	7.437 \| good	0.193 \| good
2026-04-22T22:00:00.000Z	40 \| good	3.638 \| good	14.31 \| good	43.307 \| good	4.398 \| good	5.72 \| good	0.193 \| good
2026-04-22T23:00:00.000Z	43 \| good	3.924 \| good	17.077 \| good	46.054 \| good	4.068 \| good	5.155 \| good	0.238 \| good
2026-04-23T00:00:00.000Z	41 \| good	4.042 \| good	18.42 \| good	44.277 \| good	4.636 \| good	5.413 \| good	0.238 \| good
2026-04-23T01:00:00.000Z	36 \| good	3.009 \| good	31.782 \| good	38.574 \| good	3.332 \| good	3.576 \| good	0.238 \| good
2026-04-23T02:00:00.000Z	36 \| good	3.324 \| good	19.299 \| good	38.953 \| good	1.403 \| good	5.031 \| good	0.222 \| good
2026-04-23T03:00:00.000Z	32 \| good	4.557 \| good	21.553 \| good	35.294 \| good	1.255 \| good	9.687 \| good	0.302 \| good
2026-04-23T04:00:00.000Z	33 \| good	5.533 \| good	18.696 \| good	25.584 \| good	1.064 \| good	15.919 \| good	0.353 \| good
2026-04-23T05:00:00.000Z	27 \| good	5.102 \| good	24.574 \| good	26.254 \| good	1.193 \| good	7.291 \| good	0.231 \| good
2026-04-23T06:00:00.000Z	33 \| good	6.364 \| good	28.797 \| good	27.6 \| good	0.704 \| good	10.089 \| good	0.186 \| good
2026-04-23T07:00:00.000Z	38 \| good	6.993 \| good	37.555 \| good	33.71 \| good	0.695 \| good	9.328 \| good	0.192 \| good
2026-04-23T08:00:00.000Z	38 \| good	6.563 \| good	27.673 \| good	29.443 \| good	0.692 \| good	8.554 \| good	0.186 \| good
2026-04-23T09:00:00.000Z	27 \| good	4.827 \| good	25.832 \| good	25.061 \| good	0.475 \| good	9.39 \| good	0.192 \| good
2026-04-23T10:00:00.000Z	33 \| good	5.513 \| good	23.523 \| good	23.165 \| good	0.476 \| good	11.385 \| good	0.192 \| good
2026-04-23T11:00:00.000Z	33 \| good	6.023 \| good	27.703 \| good	25.144 \| good	0.57 \| good	13.559 \| good	0.237 \| good
2026-04-23T12:00:00.000Z	38 \| good	6.529 \| good	23.352 \| good	27.493 \| good	0.644 \| good	14.146 \| good	0.281 \| good
2026-04-23T13:00:00.000Z	49 \| good	8.582 \| good	40.126 \| good	27.944 \| good	0.492 \| good	12.655 \| good	0.317 \| good
2026-04-23T14:00:00.000Z	49 \| good	9.489 \| good	52.325 \| good	32.041 \| good	0.501 \| good	10.618 \| good	0.288 \| good
2026-04-23T15:00:00.000Z	52 \| moderate	10.314 \| good	53.609 \| good	35.699 \| good	0.517 \| good	9.672 \| good	0.238 \| good
2026-04-23T16:00:00.000Z	53 \| moderate	10.266 \| good	59.252 \| fine	42.391 \| good	0.585 \| good	7.48 \| good	0.238 \| good
2026-04-23T17:00:00.000Z	54 \| moderate	10.528 \| good	43.832 \| good	42.683 \| good	0.556 \| good	6.577 \| good	0.243 \| good
2026-04-23T18:00:00.000Z	52 \| moderate	10.179 \| good	46.569 \| good	45.6 \| good	0.566 \| good	6.288 \| good	0.231 \| good
2026-04-23T19:00:00.000Z	52 \| moderate	9.544 \| good	39.491 \| good	46.582 \| good	0.531 \| good	5.869 \| good	0.231 \| good
2026-04-23T20:00:00.000Z	49 \| good	9.462 \| good	37.986 \| good	47.131 \| good	0.582 \| good	7.079 \| good	0.238 \| good
2026-04-23T21:00:00.000Z	52 \| moderate	10.112 \| good	39.547 \| good	46.893 \| good	0.737 \| good	5.998 \| good	0.243 \| good
2026-04-23T22:00:00.000Z	49 \| good	9.434 \| good	43.607 \| good	50.685 \| good	0.641 \| good	4.894 \| good	0.238 \| good
2026-04-23T23:00:00.000Z	76 \| moderate	11.8 \| good	105.55 \| fine	48.191 \| good	0.681 \| good	4.195 \| good	0.231 \| good
2026-04-24T00:00:00.000Z	42 \| good	7.311 \| good	33.602 \| good	44.749 \| good	0.683 \| good	4.081 \| good	0.238 \| good
2026-04-24T01:00:00.000Z	39 \| good	7.337 \| good	28.121 \| good	42.24 \| good	0.55 \| good	4.872 \| good	0.238 \| good
2026-04-24T02:00:00.000Z	44 \| good	7.774 \| good	34.914 \| good	42.374 \| good	0.504 \| good	6.899 \| good	0.238 \| good
2026-04-24T03:00:00.000Z	41 \| good	5.13 \| good	22.249 \| good	44.428 \| good	0.41 \| good	1.604 \| good	0.14 \| good
2026-04-24T04:00:00.000Z	44 \| good	8.048 \| good	39.904 \| good	39.009 \| good	0.436 \| good	9.71 \| good	0.186 \| good
2026-04-24T05:00:00.000Z	38 \| good	7.198 \| good	27.142 \| good	39 \| good	0.526 \| good	7.46 \| good	0.186 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.207 \| good	24.715 \| good	37.325 \| good	0.556 \| good	6.455 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.207 \| good	24.715 \| good	37.325 \| good	0.556 \| good	6.455 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	41 \| good	4.188 \| good	18.309 \| good	44.083 \| good	0.309 \| good	1.394 \| good	0.134 \| good
2026-04-24T07:00:00.000Z	42 \| good	4.13 \| good	18.068 \| good	44.951 \| good	0.266 \| good	1.372 \| good	0.13 \| good
2026-04-24T08:00:00.000Z	44 \| good	3.376 \| good	14.961 \| good	46.868 \| good	0.222 \| good	1.35 \| good	0.127 \| good
2026-04-24T09:00:00.000Z	41 \| good	2.645 \| good	10.907 \| good	43.919 \| good	0.179 \| good	1.328 \| good	0.124 \| good
2026-04-24T10:00:00.000Z	40 \| good	2.536 \| good	10.27 \| good	42.812 \| good	0.22 \| good	1.608 \| good	0.126 \| good
2026-04-24T11:00:00.000Z	44 \| good	7.633 \| good	33.714 \| good	37.516 \| good	0.261 \| good	1.888 \| good	0.127 \| good
2026-04-24T12:00:00.000Z	38 \| good	6.906 \| good	30.718 \| good	31.466 \| good	0.302 \| good	2.168 \| good	0.128 \| good
2026-04-24T13:00:00.000Z	33 \| good	5.693 \| good	24.297 \| good	36.14 \| good	0.324 \| good	2.34 \| good	0.133 \| good
2026-04-24T14:00:00.000Z	39 \| good	5.416 \| good	23.084 \| good	41.697 \| good	0.345 \| good	2.512 \| good	0.138 \| good
2026-04-24T15:00:00.000Z	40 \| good	4.415 \| good	19.261 \| good	42.631 \| good	0.366 \| good	2.685 \| good	0.143 \| good
2026-04-24T16:00:00.000Z	40 \| good	7.218 \| good	31.694 \| good	42.873 \| good	0.311 \| good	2.234 \| good	0.141 \| good
2026-04-24T17:00:00.000Z	49 \| good	9.347 \| good	41.707 \| good	44.105 \| good	0.256 \| good	1.784 \| good	0.138 \| good
2026-04-24T18:00:00.000Z	44 \| good	8.122 \| good	35.816 \| good	47.095 \| good	0.201 \| good	1.333 \| good	0.135 \| good
2026-04-24T19:00:00.000Z	44 \| good	6.541 \| good	29.16 \| good	47.162 \| good	0.216 \| good	1.234 \| good	0.135 \| good
2026-04-24T20:00:00.000Z	43 \| good	4.653 \| good	20.102 \| good	45.691 \| good	0.231 \| good	1.135 \| good	0.136 \| good
2026-04-24T21:00:00.000Z	41 \| good	3.55 \| good	15.4 \| good	44.133 \| good	0.245 \| good	1.036 \| good	0.136 \| good
2026-04-24T22:00:00.000Z	40 \| good	4.267 \| good	18.72 \| good	42.881 \| good	0.266 \| good	1.773 \| good	0.142 \| good
2026-04-24T23:00:00.000Z	40 \| good	5.08 \| good	21.845 \| good	42.827 \| good	0.286 \| good	2.509 \| good	0.149 \| good
2026-04-25T00:00:00.000Z	38 \| good	4.583 \| good	19.807 \| good	40.582 \| good	0.307 \| good	3.246 \| good	0.155 \| good
2026-04-25T01:00:00.000Z	40 \| good	5.631 \| good	24.606 \| good	43.364 \| good	0.345 \| good	5.206 \| good	0.173 \| good
2026-04-25T02:00:00.000Z	39 \| good	4.499 \| good	19.582 \| good	41.7 \| good	0.382 \| good	7.165 \| good	0.191 \| good
2026-04-25T03:00:00.000Z	36 \| good	3.942 \| good	17.128 \| good	38.86 \| good	0.42 \| good	9.125 \| good	0.209 \| good
2026-04-25T04:00:00.000Z	33 \| good	4.56 \| good	19.846 \| good	35.765 \| good	0.388 \| good	7.703 \| good	0.197 \| good
2026-04-25T05:00:00.000Z	29 \| good	4.791 \| good	20.646 \| good	30.694 \| good	0.355 \| good	6.28 \| good	0.185 \| good
2026-04-25T06:00:00.000Z	33 \| good	5.578 \| good	24.368 \| good	29.229 \| good	0.323 \| good	4.858 \| good	0.172 \| good
2026-04-25T07:00:00.000Z	27 \| good	5.306 \| good	22.697 \| good	26.517 \| good	0.328 \| good	4.616 \| good	0.17 \| good
2026-04-25T08:00:00.000Z	33 \| good	5.582 \| good	24.253 \| good	23.74 \| good	0.333 \| good	4.375 \| good	0.167 \| good
2026-04-25T09:00:00.000Z	27 \| good	5.412 \| good	23.282 \| good	22.308 \| good	0.337 \| good	4.133 \| good	0.164 \| good
2026-04-25T10:00:00.000Z	27 \| good	5.235 \| good	22.502 \| good	25.596 \| good	0.36 \| good	3.976 \| good	0.164 \| good
2026-04-25T11:00:00.000Z	27 \| good	5.187 \| good	22.44 \| good	19.805 \| good	0.383 \| good	3.82 \| good	0.164 \| good
2026-04-25T12:00:00.000Z	27 \| good	5.027 \| good	21.597 \| good	19.741 \| good	0.406 \| good	3.663 \| good	0.164 \| good
2026-04-25T13:00:00.000Z	25 \| good	4.276 \| good	18.868 \| good	26.855 \| good	0.489 \| good	3.348 \| good	0.168 \| good
2026-04-25T14:00:00.000Z	30 \| good	4.816 \| good	20.965 \| good	32.042 \| good	0.572 \| good	3.033 \| good	0.171 \| good
2026-04-25T15:00:00.000Z	34 \| good	3.368 \| good	14.962 \| good	36.914 \| good	0.655 \| good	2.718 \| good	0.174 \| good
2026-04-25T16:00:00.000Z	39 \| good	4.436 \| good	19.193 \| good	42.075 \| good	0.628 \| good	2.143 \| good	0.166 \| good
2026-04-25T17:00:00.000Z	45 \| good	4.58 \| good	19.926 \| good	48.912 \| good	0.601 \| good	1.567 \| good	0.158 \| good
2026-04-25T18:00:00.000Z	50 \| good	4.992 \| good	21.434 \| good	54.111 \| good	0.574 \| good	0.991 \| good	0.151 \| good
2026-04-25T19:00:00.000Z	58 \| moderate	5.044 \| good	21.614 \| good	56.824 \| fine	0.555 \| good	0.94 \| good	0.148 \| good
2026-04-25T20:00:00.000Z	54 \| moderate	5.374 \| good	23.261 \| good	56.16 \| fine	0.537 \| good	0.889 \| good	0.146 \| good
2026-04-25T21:00:00.000Z	48 \| good	5.398 \| good	23.236 \| good	51.733 \| good	0.518 \| good	0.837 \| good	0.144 \| good
2026-04-25T22:00:00.000Z	44 \| good	6.353 \| good	28.319 \| good	48.305 \| good	0.534 \| good	1.883 \| good	0.154 \| good
2026-04-25T23:00:00.000Z	39 \| good	5.749 \| good	24.942 \| good	42.385 \| good	0.55 \| good	2.928 \| good	0.165 \| good
2026-04-26T00:00:00.000Z	47 \| good	4.843 \| good	5.549 \| good	50.606 \| good	0.565 \| good	3.952 \| good	0.175 \| good
2026-04-26T01:00:00.000Z	49 \| good	8.636 \| good	37.822 \| good	43.629 \| good	0.57 \| good	4.738 \| good	0.18 \| good
2026-04-26T02:00:00.000Z	54 \| moderate	11.268 \| good	49.743 \| good	37.616 \| good	0.574 \| good	5.503 \| good	0.185 \| good
2026-04-26T03:00:00.000Z	54 \| moderate	10.906 \| good	48.316 \| good	32.06 \| good	0.579 \| good	6.268 \| good	0.19 \| good
2026-04-26T04:00:00.000Z	52 \| moderate	9.961 \| good	44.123 \| good	30.166 \| good	0.603 \| good	5.391 \| good	0.179 \| good
2026-04-26T05:00:00.000Z	52 \| moderate	10.015 \| good	44.2 \| good	29.891 \| good	0.627 \| good	4.514 \| good	0.168 \| good

O'Fallon

Empower business decisions with accurate air quality data

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

0.19ppm

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

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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 11:00:00 on 2026-04-23.

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 09:00:00 on 2026-04-23.

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

The real-time air quality index in O'fallon, Missouri is 44, currently categorized as Good.

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

The most common pollutant in O'fallon, Missouri is PM2.5.

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 8.048 μg/m³.

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

The current PM₁₀ levels in O'fallon, Missouri are 39.904 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 0.436 ppb.

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

The current ozone (O₃) levels at O'fallon, Missouri is 39.009 ppm.

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

The current nitrogen dioxide (NO₂) levels at O'fallon, Missouri is 9.71 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T07:00:00.000Z	42 \| good	4.891 \| good	17.961 \| good	45.403 \| good	1.041 \| good	4.367 \| good	0.193 \| good
2026-04-22T08:00:00.000Z	39 \| good	5.644 \| good	18.109 \| good	41.592 \| good	1.031 \| good	4.666 \| good	0.193 \| good
2026-04-22T09:00:00.000Z	32 \| good	5.083 \| good	21.713 \| good	34.865 \| good	0.681 \| good	4.981 \| good	0.193 \| good
2026-04-22T10:00:00.000Z	39 \| good	4.48 \| good	16.301 \| good	42.292 \| good	1.153 \| good	4.963 \| good	0.193 \| good
2026-04-22T11:00:00.000Z	36 \| good	4.88 \| good	19.184 \| good	38.827 \| good	0.855 \| good	7.788 \| good	0.193 \| good
2026-04-22T12:00:00.000Z	31 \| good	5.412 \| good	17.875 \| good	34.372 \| good	0.51 \| good	11.611 \| good	0.238 \| good
2026-04-22T13:00:00.000Z	33 \| good	5.924 \| good	21.876 \| good	33.834 \| good	0.791 \| good	12.751 \| good	0.273 \| good
2026-04-22T14:00:00.000Z	38 \| good	5.309 \| good	18.735 \| good	40.75 \| good	1.126 \| good	7.722 \| good	0.251 \| good
2026-04-22T15:00:00.000Z	38 \| good	4.043 \| good	21.504 \| good	41.004 \| good	1.033 \| good	7.185 \| good	0.238 \| good
2026-04-22T16:00:00.000Z	38 \| good	3.44 \| good	18.843 \| good	40.802 \| good	3.145 \| good	7.406 \| good	0.228 \| good
2026-04-22T17:00:00.000Z	42 \| good	3.487 \| good	15.591 \| good	44.893 \| good	3.031 \| good	7.433 \| good	0.198 \| good
2026-04-22T18:00:00.000Z	41 \| good	3.927 \| good	13.646 \| good	44.387 \| good	2.793 \| good	7.584 \| good	0.205 \| good
2026-04-22T19:00:00.000Z	40 \| good	4.942 \| good	20.088 \| good	42.554 \| good	3.94 \| good	9.007 \| good	0.205 \| good
2026-04-22T20:00:00.000Z	38 \| good	3.855 \| good	14.92 \| good	41.189 \| good	4.354 \| good	8.014 \| good	0.238 \| good
2026-04-22T21:00:00.000Z	39 \| good	4.036 \| good	17.553 \| good	41.91 \| good	4.047 \| good	7.437 \| good	0.193 \| good
2026-04-22T22:00:00.000Z	40 \| good	3.638 \| good	14.31 \| good	43.307 \| good	4.398 \| good	5.72 \| good	0.193 \| good
2026-04-22T23:00:00.000Z	43 \| good	3.924 \| good	17.077 \| good	46.054 \| good	4.068 \| good	5.155 \| good	0.238 \| good
2026-04-23T00:00:00.000Z	41 \| good	4.042 \| good	18.42 \| good	44.277 \| good	4.636 \| good	5.413 \| good	0.238 \| good
2026-04-23T01:00:00.000Z	36 \| good	3.009 \| good	31.782 \| good	38.574 \| good	3.332 \| good	3.576 \| good	0.238 \| good
2026-04-23T02:00:00.000Z	36 \| good	3.324 \| good	19.299 \| good	38.953 \| good	1.403 \| good	5.031 \| good	0.222 \| good
2026-04-23T03:00:00.000Z	32 \| good	4.557 \| good	21.553 \| good	35.294 \| good	1.255 \| good	9.687 \| good	0.302 \| good
2026-04-23T04:00:00.000Z	33 \| good	5.533 \| good	18.696 \| good	25.584 \| good	1.064 \| good	15.919 \| good	0.353 \| good
2026-04-23T05:00:00.000Z	27 \| good	5.102 \| good	24.574 \| good	26.254 \| good	1.193 \| good	7.291 \| good	0.231 \| good
2026-04-23T06:00:00.000Z	33 \| good	6.364 \| good	28.797 \| good	27.6 \| good	0.704 \| good	10.089 \| good	0.186 \| good
2026-04-23T07:00:00.000Z	38 \| good	6.993 \| good	37.555 \| good	33.71 \| good	0.695 \| good	9.328 \| good	0.192 \| good
2026-04-23T08:00:00.000Z	38 \| good	6.563 \| good	27.673 \| good	29.443 \| good	0.692 \| good	8.554 \| good	0.186 \| good
2026-04-23T09:00:00.000Z	27 \| good	4.827 \| good	25.832 \| good	25.061 \| good	0.475 \| good	9.39 \| good	0.192 \| good
2026-04-23T10:00:00.000Z	33 \| good	5.513 \| good	23.523 \| good	23.165 \| good	0.476 \| good	11.385 \| good	0.192 \| good
2026-04-23T11:00:00.000Z	33 \| good	6.023 \| good	27.703 \| good	25.144 \| good	0.57 \| good	13.559 \| good	0.237 \| good
2026-04-23T12:00:00.000Z	38 \| good	6.529 \| good	23.352 \| good	27.493 \| good	0.644 \| good	14.146 \| good	0.281 \| good
2026-04-23T13:00:00.000Z	49 \| good	8.582 \| good	40.126 \| good	27.944 \| good	0.492 \| good	12.655 \| good	0.317 \| good
2026-04-23T14:00:00.000Z	49 \| good	9.489 \| good	52.325 \| good	32.041 \| good	0.501 \| good	10.618 \| good	0.288 \| good
2026-04-23T15:00:00.000Z	52 \| moderate	10.314 \| good	53.609 \| good	35.699 \| good	0.517 \| good	9.672 \| good	0.238 \| good
2026-04-23T16:00:00.000Z	53 \| moderate	10.266 \| good	59.252 \| fine	42.391 \| good	0.585 \| good	7.48 \| good	0.238 \| good
2026-04-23T17:00:00.000Z	54 \| moderate	10.528 \| good	43.832 \| good	42.683 \| good	0.556 \| good	6.577 \| good	0.243 \| good
2026-04-23T18:00:00.000Z	52 \| moderate	10.179 \| good	46.569 \| good	45.6 \| good	0.566 \| good	6.288 \| good	0.231 \| good
2026-04-23T19:00:00.000Z	52 \| moderate	9.544 \| good	39.491 \| good	46.582 \| good	0.531 \| good	5.869 \| good	0.231 \| good
2026-04-23T20:00:00.000Z	49 \| good	9.462 \| good	37.986 \| good	47.131 \| good	0.582 \| good	7.079 \| good	0.238 \| good
2026-04-23T21:00:00.000Z	52 \| moderate	10.112 \| good	39.547 \| good	46.893 \| good	0.737 \| good	5.998 \| good	0.243 \| good
2026-04-23T22:00:00.000Z	49 \| good	9.434 \| good	43.607 \| good	50.685 \| good	0.641 \| good	4.894 \| good	0.238 \| good
2026-04-23T23:00:00.000Z	76 \| moderate	11.8 \| good	105.55 \| fine	48.191 \| good	0.681 \| good	4.195 \| good	0.231 \| good
2026-04-24T00:00:00.000Z	42 \| good	7.311 \| good	33.602 \| good	44.749 \| good	0.683 \| good	4.081 \| good	0.238 \| good
2026-04-24T01:00:00.000Z	39 \| good	7.337 \| good	28.121 \| good	42.24 \| good	0.55 \| good	4.872 \| good	0.238 \| good
2026-04-24T02:00:00.000Z	44 \| good	7.774 \| good	34.914 \| good	42.374 \| good	0.504 \| good	6.899 \| good	0.238 \| good
2026-04-24T03:00:00.000Z	41 \| good	5.13 \| good	22.249 \| good	44.428 \| good	0.41 \| good	1.604 \| good	0.14 \| good
2026-04-24T04:00:00.000Z	44 \| good	8.048 \| good	39.904 \| good	39.009 \| good	0.436 \| good	9.71 \| good	0.186 \| good
2026-04-24T05:00:00.000Z	38 \| good	7.198 \| good	27.142 \| good	39 \| good	0.526 \| good	7.46 \| good	0.186 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.207 \| good	24.715 \| good	37.325 \| good	0.556 \| good	6.455 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	38 \| good	7.207 \| good	24.715 \| good	37.325 \| good	0.556 \| good	6.455 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	41 \| good	4.188 \| good	18.309 \| good	44.083 \| good	0.309 \| good	1.394 \| good	0.134 \| good
2026-04-24T07:00:00.000Z	42 \| good	4.13 \| good	18.068 \| good	44.951 \| good	0.266 \| good	1.372 \| good	0.13 \| good
2026-04-24T08:00:00.000Z	44 \| good	3.376 \| good	14.961 \| good	46.868 \| good	0.222 \| good	1.35 \| good	0.127 \| good
2026-04-24T09:00:00.000Z	41 \| good	2.645 \| good	10.907 \| good	43.919 \| good	0.179 \| good	1.328 \| good	0.124 \| good
2026-04-24T10:00:00.000Z	40 \| good	2.536 \| good	10.27 \| good	42.812 \| good	0.22 \| good	1.608 \| good	0.126 \| good
2026-04-24T11:00:00.000Z	44 \| good	7.633 \| good	33.714 \| good	37.516 \| good	0.261 \| good	1.888 \| good	0.127 \| good
2026-04-24T12:00:00.000Z	38 \| good	6.906 \| good	30.718 \| good	31.466 \| good	0.302 \| good	2.168 \| good	0.128 \| good
2026-04-24T13:00:00.000Z	33 \| good	5.693 \| good	24.297 \| good	36.14 \| good	0.324 \| good	2.34 \| good	0.133 \| good
2026-04-24T14:00:00.000Z	39 \| good	5.416 \| good	23.084 \| good	41.697 \| good	0.345 \| good	2.512 \| good	0.138 \| good
2026-04-24T15:00:00.000Z	40 \| good	4.415 \| good	19.261 \| good	42.631 \| good	0.366 \| good	2.685 \| good	0.143 \| good
2026-04-24T16:00:00.000Z	40 \| good	7.218 \| good	31.694 \| good	42.873 \| good	0.311 \| good	2.234 \| good	0.141 \| good
2026-04-24T17:00:00.000Z	49 \| good	9.347 \| good	41.707 \| good	44.105 \| good	0.256 \| good	1.784 \| good	0.138 \| good
2026-04-24T18:00:00.000Z	44 \| good	8.122 \| good	35.816 \| good	47.095 \| good	0.201 \| good	1.333 \| good	0.135 \| good
2026-04-24T19:00:00.000Z	44 \| good	6.541 \| good	29.16 \| good	47.162 \| good	0.216 \| good	1.234 \| good	0.135 \| good
2026-04-24T20:00:00.000Z	43 \| good	4.653 \| good	20.102 \| good	45.691 \| good	0.231 \| good	1.135 \| good	0.136 \| good
2026-04-24T21:00:00.000Z	41 \| good	3.55 \| good	15.4 \| good	44.133 \| good	0.245 \| good	1.036 \| good	0.136 \| good
2026-04-24T22:00:00.000Z	40 \| good	4.267 \| good	18.72 \| good	42.881 \| good	0.266 \| good	1.773 \| good	0.142 \| good
2026-04-24T23:00:00.000Z	40 \| good	5.08 \| good	21.845 \| good	42.827 \| good	0.286 \| good	2.509 \| good	0.149 \| good
2026-04-25T00:00:00.000Z	38 \| good	4.583 \| good	19.807 \| good	40.582 \| good	0.307 \| good	3.246 \| good	0.155 \| good
2026-04-25T01:00:00.000Z	40 \| good	5.631 \| good	24.606 \| good	43.364 \| good	0.345 \| good	5.206 \| good	0.173 \| good
2026-04-25T02:00:00.000Z	39 \| good	4.499 \| good	19.582 \| good	41.7 \| good	0.382 \| good	7.165 \| good	0.191 \| good
2026-04-25T03:00:00.000Z	36 \| good	3.942 \| good	17.128 \| good	38.86 \| good	0.42 \| good	9.125 \| good	0.209 \| good
2026-04-25T04:00:00.000Z	33 \| good	4.56 \| good	19.846 \| good	35.765 \| good	0.388 \| good	7.703 \| good	0.197 \| good
2026-04-25T05:00:00.000Z	29 \| good	4.791 \| good	20.646 \| good	30.694 \| good	0.355 \| good	6.28 \| good	0.185 \| good
2026-04-25T06:00:00.000Z	33 \| good	5.578 \| good	24.368 \| good	29.229 \| good	0.323 \| good	4.858 \| good	0.172 \| good
2026-04-25T07:00:00.000Z	27 \| good	5.306 \| good	22.697 \| good	26.517 \| good	0.328 \| good	4.616 \| good	0.17 \| good
2026-04-25T08:00:00.000Z	33 \| good	5.582 \| good	24.253 \| good	23.74 \| good	0.333 \| good	4.375 \| good	0.167 \| good
2026-04-25T09:00:00.000Z	27 \| good	5.412 \| good	23.282 \| good	22.308 \| good	0.337 \| good	4.133 \| good	0.164 \| good
2026-04-25T10:00:00.000Z	27 \| good	5.235 \| good	22.502 \| good	25.596 \| good	0.36 \| good	3.976 \| good	0.164 \| good
2026-04-25T11:00:00.000Z	27 \| good	5.187 \| good	22.44 \| good	19.805 \| good	0.383 \| good	3.82 \| good	0.164 \| good
2026-04-25T12:00:00.000Z	27 \| good	5.027 \| good	21.597 \| good	19.741 \| good	0.406 \| good	3.663 \| good	0.164 \| good
2026-04-25T13:00:00.000Z	25 \| good	4.276 \| good	18.868 \| good	26.855 \| good	0.489 \| good	3.348 \| good	0.168 \| good
2026-04-25T14:00:00.000Z	30 \| good	4.816 \| good	20.965 \| good	32.042 \| good	0.572 \| good	3.033 \| good	0.171 \| good
2026-04-25T15:00:00.000Z	34 \| good	3.368 \| good	14.962 \| good	36.914 \| good	0.655 \| good	2.718 \| good	0.174 \| good
2026-04-25T16:00:00.000Z	39 \| good	4.436 \| good	19.193 \| good	42.075 \| good	0.628 \| good	2.143 \| good	0.166 \| good
2026-04-25T17:00:00.000Z	45 \| good	4.58 \| good	19.926 \| good	48.912 \| good	0.601 \| good	1.567 \| good	0.158 \| good
2026-04-25T18:00:00.000Z	50 \| good	4.992 \| good	21.434 \| good	54.111 \| good	0.574 \| good	0.991 \| good	0.151 \| good
2026-04-25T19:00:00.000Z	58 \| moderate	5.044 \| good	21.614 \| good	56.824 \| fine	0.555 \| good	0.94 \| good	0.148 \| good
2026-04-25T20:00:00.000Z	54 \| moderate	5.374 \| good	23.261 \| good	56.16 \| fine	0.537 \| good	0.889 \| good	0.146 \| good
2026-04-25T21:00:00.000Z	48 \| good	5.398 \| good	23.236 \| good	51.733 \| good	0.518 \| good	0.837 \| good	0.144 \| good
2026-04-25T22:00:00.000Z	44 \| good	6.353 \| good	28.319 \| good	48.305 \| good	0.534 \| good	1.883 \| good	0.154 \| good
2026-04-25T23:00:00.000Z	39 \| good	5.749 \| good	24.942 \| good	42.385 \| good	0.55 \| good	2.928 \| good	0.165 \| good
2026-04-26T00:00:00.000Z	47 \| good	4.843 \| good	5.549 \| good	50.606 \| good	0.565 \| good	3.952 \| good	0.175 \| good
2026-04-26T01:00:00.000Z	49 \| good	8.636 \| good	37.822 \| good	43.629 \| good	0.57 \| good	4.738 \| good	0.18 \| good
2026-04-26T02:00:00.000Z	54 \| moderate	11.268 \| good	49.743 \| good	37.616 \| good	0.574 \| good	5.503 \| good	0.185 \| good
2026-04-26T03:00:00.000Z	54 \| moderate	10.906 \| good	48.316 \| good	32.06 \| good	0.579 \| good	6.268 \| good	0.19 \| good
2026-04-26T04:00:00.000Z	52 \| moderate	9.961 \| good	44.123 \| good	30.166 \| good	0.603 \| good	5.391 \| good	0.179 \| good
2026-04-26T05:00:00.000Z	52 \| moderate	10.015 \| good	44.2 \| good	29.891 \| good	0.627 \| good	4.514 \| good	0.168 \| 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

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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?