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

The current PM10 levels in O'fallon, Missouri are 66.394 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 0.467 ppb.

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

The current ozone (O3) levels at O'fallon, Missouri is 23.454 ppm.

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

The current nitrogen dioxide (NO2) levels at O'fallon, Missouri is 3.59 ppb.

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

Name: Live air pollution levels in O'Fallon, Missouri today
Creator: Ambee

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)

Moderate

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)

10.35 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

54.24 μg/m³

155

255

425

605+

Ozone (O₃)

30.96 ppb

201

201+

Sulfur Dioxide (SO₂)

0.54 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.94 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.23 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
2025-09-03T21:00:00.000Z	44 \| good	4.702 \| good	16.834 \| good	47.044 \| good	1.105 \| good	4.901 \| good	0.193 \| good
2025-09-03T22:00:00.000Z	43 \| good	4.628 \| good	18.453 \| good	46.307 \| good	1.071 \| good	3.94 \| good	0.193 \| good
2025-09-03T23:00:00.000Z	44 \| good	6.022 \| good	22.668 \| good	47.928 \| good	1.176 \| good	4.064 \| good	0.246 \| good
2025-09-04T00:00:00.000Z	44 \| good	5.546 \| good	23.405 \| good	46.708 \| good	0.544 \| good	5.717 \| good	0.193 \| good
2025-09-04T01:00:00.000Z	60 \| moderate	5.441 \| good	73.256 \| fine	41.933 \| good	0.486 \| good	2.532 \| good	0.193 \| good
2025-09-04T02:00:00.000Z	35 \| good	5.282 \| good	31.163 \| good	38.048 \| good	0.683 \| good	2.632 \| good	0.189 \| good
2025-09-04T03:00:00.000Z	31 \| good	4.807 \| good	21.546 \| good	33.883 \| good	0.746 \| good	2.838 \| good	0.237 \| good
2025-09-04T04:00:00.000Z	29 \| good	4.732 \| good	24.353 \| good	30.831 \| good	0.681 \| good	2.05 \| good	0.193 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.395 \| good	26.187 \| good	27.104 \| good	0.639 \| good	1.689 \| good	0.193 \| good
2025-09-04T06:00:00.000Z	52 \| moderate	9.545 \| good	48.561 \| good	25.915 \| good	0.383 \| good	1.43 \| good	0.193 \| good
2025-09-04T07:00:00.000Z	44 \| good	7.584 \| good	38.775 \| good	25.602 \| good	0.386 \| good	1.432 \| good	0.193 \| good
2025-09-04T08:00:00.000Z	52 \| moderate	10.363 \| good	58.321 \| fine	24.607 \| good	0.388 \| good	1.435 \| good	0.193 \| good
2025-09-04T09:00:00.000Z	62 \| moderate	15.231 \| fine	70.046 \| fine	17.726 \| good	0.587 \| good	2.443 \| good	0.234 \| good
2025-09-04T10:00:00.000Z	64 \| moderate	16.167 \| fine	68.103 \| fine	19.099 \| good	0.402 \| good	2.718 \| good	0.229 \| good
2025-09-04T11:00:00.000Z	64 \| moderate	15.816 \| fine	40.55 \| good	19.007 \| good	0.751 \| good	3.98 \| good	0.234 \| good
2025-09-04T12:00:00.000Z	62 \| moderate	14.866 \| fine	64.812 \| fine	19.495 \| good	0.344 \| good	4.879 \| good	0.281 \| good
2025-09-04T13:00:00.000Z	64 \| moderate	16.155 \| fine	71.008 \| fine	26.713 \| good	0.38 \| good	2.524 \| good	0.209 \| good
2025-09-04T14:00:00.000Z	64 \| moderate	15.751 \| fine	72.747 \| fine	22.295 \| good	0.378 \| good	3.611 \| good	0.298 \| good
2025-09-04T15:00:00.000Z	54 \| moderate	10.946 \| good	40.902 \| good	21.322 \| good	0.633 \| good	2.825 \| good	0.291 \| good
2025-09-04T16:00:00.000Z	58 \| moderate	12.713 \| fine	58.336 \| fine	26.625 \| good	0.516 \| good	3.183 \| good	0.245 \| good
2025-09-04T17:00:00.000Z	64 \| moderate	15.569 \| fine	68.92 \| fine	29.389 \| good	0.559 \| good	3.063 \| good	0.245 \| good
2025-09-04T18:00:00.000Z	60 \| moderate	13.798 \| fine	63.672 \| fine	34.301 \| good	0.592 \| good	3.966 \| good	0.287 \| good
2025-09-04T19:00:00.000Z	56 \| moderate	12.183 \| fine	33.572 \| good	35.41 \| good	0.592 \| good	4.098 \| good	0.285 \| good
2025-09-04T20:00:00.000Z	56 \| moderate	11.977 \| good	53.469 \| good	36.094 \| good	0.962 \| good	4.266 \| good	0.291 \| good
2025-09-04T21:00:00.000Z	58 \| moderate	12.672 \| fine	50.202 \| good	37.763 \| good	0.746 \| good	4.736 \| good	0.291 \| good
2025-09-04T22:00:00.000Z	64 \| moderate	16.329 \| fine	69.845 \| fine	40.127 \| good	2.721 \| good	4.154 \| good	0.291 \| good
2025-09-04T23:00:00.000Z	56 \| moderate	11.508 \| good	56.317 \| fine	41.235 \| good	6.489 \| good	4.464 \| good	0.296 \| good
2025-09-05T00:00:00.000Z	62 \| moderate	14.995 \| fine	76.23 \| fine	41.233 \| good	3.762 \| good	5.856 \| good	0.26 \| good
2025-09-05T01:00:00.000Z	64 \| moderate	15.658 \| fine	66.65 \| fine	33.185 \| good	3.414 \| good	8.272 \| good	0.347 \| good
2025-09-05T02:00:00.000Z	62 \| moderate	15.05 \| fine	56.521 \| fine	38.637 \| good	3.032 \| good	10.919 \| good	0.378 \| good
2025-09-05T03:00:00.000Z	62 \| moderate	13.227 \| fine	77.997 \| fine	30.076 \| good	2.409 \| good	16.385 \| good	0.34 \| good
2025-09-05T04:00:00.000Z	58 \| moderate	10.873 \| good	69.896 \| fine	28.072 \| good	1.61 \| good	9.42 \| good	0.336 \| good
2025-09-05T05:00:00.000Z	58 \| moderate	13.343 \| fine	58.534 \| fine	23.594 \| good	0.981 \| good	9.676 \| good	0.336 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	10.079 \| good	55.443 \| fine	22.937 \| good	0.698 \| good	10.368 \| good	0.285 \| good
2025-09-05T07:00:00.000Z	56 \| moderate	11.527 \| good	55.801 \| fine	21.972 \| good	0.705 \| good	9.981 \| good	0.285 \| good
2025-09-05T08:00:00.000Z	58 \| moderate	13.273 \| fine	51.171 \| good	19.664 \| good	0.711 \| good	9.932 \| good	0.285 \| good
2025-09-05T09:00:00.000Z	60 \| moderate	13.686 \| fine	49.583 \| good	17.281 \| good	1.022 \| good	6.571 \| good	0.276 \| good
2025-09-05T10:00:00.000Z	62 \| moderate	14.527 \| fine	60.347 \| fine	17.927 \| good	0.958 \| good	4.099 \| good	0.276 \| good
2025-09-05T11:00:00.000Z	58 \| moderate	13.195 \| fine	41.818 \| good	14.152 \| good	0.865 \| good	5.888 \| good	0.281 \| good
2025-09-05T12:00:00.000Z	56 \| moderate	12.383 \| fine	55.764 \| fine	20.201 \| good	0.464 \| good	5.093 \| good	0.27 \| good
2025-09-05T13:00:00.000Z	58 \| moderate	12.981 \| fine	55.949 \| fine	22.299 \| good	0.424 \| good	4.971 \| good	0.281 \| good
2025-09-05T14:00:00.000Z	62 \| moderate	14.7 \| fine	72.116 \| fine	23.56 \| good	0.433 \| good	3.677 \| good	0.287 \| good
2025-09-05T15:00:00.000Z	49 \| good	9.041 \| good	42.737 \| good	24.099 \| good	0.456 \| good	2.788 \| good	0.336 \| good
2025-09-05T16:00:00.000Z	52 \| moderate	10.236 \| good	46.494 \| good	26.791 \| good	0.29 \| good	2.08 \| good	0.291 \| good
2025-09-05T17:00:00.000Z	52 \| moderate	9.767 \| good	49.114 \| good	28.104 \| good	0.308 \| good	2.175 \| good	0.287 \| good
2025-09-05T18:00:00.000Z	54 \| moderate	11.216 \| good	46.759 \| good	29.809 \| good	0.321 \| good	2.736 \| good	0.229 \| good
2025-09-05T19:00:00.000Z	52 \| moderate	10.319 \| good	53.195 \| good	30.056 \| good	0.498 \| good	3.092 \| good	0.228 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.825 \| good	37.971 \| good	29.614 \| good	0.546 \| good	1.828 \| good	0.27 \| good
2025-09-05T20:00:00.000Z	52 \| moderate	10.346 \| good	54.239 \| good	30.964 \| good	0.541 \| good	2.944 \| good	0.227 \| good
2025-09-05T16:00:00.000Z	38 \| good	6.694 \| good	29.852 \| good	37.226 \| good	0.335 \| good	1.659 \| good	0.199 \| good
2025-09-05T17:00:00.000Z	35 \| good	6.302 \| good	28.037 \| good	37.765 \| good	0.309 \| good	1.313 \| good	0.182 \| good
2025-09-05T18:00:00.000Z	33 \| good	5.898 \| good	25.88 \| good	34.409 \| good	0.282 \| good	0.967 \| good	0.166 \| good
2025-09-05T19:00:00.000Z	33 \| good	6.449 \| good	29.02 \| good	31.398 \| good	0.289 \| good	1.043 \| good	0.164 \| good
2025-09-05T20:00:00.000Z	38 \| good	6.977 \| good	30.865 \| good	28.927 \| good	0.296 \| good	1.12 \| good	0.162 \| good
2025-09-05T21:00:00.000Z	28 \| good	4.858 \| good	20.929 \| good	30.2 \| good	0.303 \| good	1.196 \| good	0.161 \| good
2025-09-05T22:00:00.000Z	29 \| good	3.909 \| good	17.258 \| good	31.486 \| good	0.314 \| good	1.745 \| good	0.168 \| good
2025-09-05T23:00:00.000Z	31 \| good	3.013 \| good	12.95 \| good	34.415 \| good	0.325 \| good	2.294 \| good	0.175 \| good
2025-09-06T00:00:00.000Z	32 \| good	0.704 \| good	2.602 \| good	34.851 \| good	0.336 \| good	2.843 \| good	0.181 \| good
2025-09-06T01:00:00.000Z	35 \| good	0.711 \| good	2.369 \| good	38.385 \| good	0.312 \| good	2.706 \| good	0.182 \| good
2025-09-06T02:00:00.000Z	34 \| good	1.12 \| good	4.622 \| good	36.948 \| good	0.287 \| good	2.57 \| good	0.182 \| good
2025-09-06T03:00:00.000Z	31 \| good	3.549 \| good	15.595 \| good	32.938 \| good	0.262 \| good	2.434 \| good	0.183 \| good
2025-09-06T04:00:00.000Z	27 \| good	5.099 \| good	21.897 \| good	26.283 \| good	0.261 \| good	2.56 \| good	0.185 \| good
2025-09-06T05:00:00.000Z	33 \| good	5.9 \| good	26.629 \| good	23.372 \| good	0.26 \| good	2.686 \| good	0.187 \| good
2025-09-06T06:00:00.000Z	44 \| good	8.285 \| good	36.774 \| good	21.551 \| good	0.259 \| good	2.812 \| good	0.189 \| good
2025-09-06T07:00:00.000Z	49 \| good	9.315 \| good	41.277 \| good	19.262 \| good	0.264 \| good	3.118 \| good	0.184 \| good
2025-09-06T08:00:00.000Z	44 \| good	8.437 \| good	36.997 \| good	17.176 \| good	0.269 \| good	3.424 \| good	0.18 \| good
2025-09-06T09:00:00.000Z	44 \| good	7.569 \| good	33.3 \| good	14.764 \| good	0.275 \| good	3.73 \| good	0.175 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	9.992 \| good	44.293 \| good	11.032 \| good	0.298 \| good	4.76 \| good	0.181 \| good
2025-09-06T11:00:00.000Z	49 \| good	8.89 \| good	39.463 \| good	10.392 \| good	0.321 \| good	5.789 \| good	0.186 \| good
2025-09-06T12:00:00.000Z	52 \| moderate	9.842 \| good	43.617 \| good	10.948 \| good	0.344 \| good	6.819 \| good	0.192 \| good
2025-09-06T13:00:00.000Z	54 \| moderate	10.861 \| good	48.17 \| good	17.089 \| good	0.399 \| good	5.177 \| good	0.184 \| good
2025-09-06T14:00:00.000Z	49 \| good	8.864 \| good	39.316 \| good	26.6 \| good	0.454 \| good	3.536 \| good	0.176 \| good
2025-09-06T15:00:00.000Z	32 \| good	3.185 \| good	13.801 \| good	34.97 \| good	0.508 \| good	1.894 \| good	0.168 \| good
2025-09-06T16:00:00.000Z	35 \| good	2.897 \| good	11.83 \| good	38.169 \| good	0.403 \| good	1.424 \| good	0.16 \| good
2025-09-06T17:00:00.000Z	37 \| good	2.692 \| good	11.036 \| good	39.742 \| good	0.297 \| good	0.953 \| good	0.152 \| good
2025-09-06T18:00:00.000Z	37 \| good	3.124 \| good	12.961 \| good	39.507 \| good	0.191 \| good	0.483 \| good	0.144 \| good
2025-09-06T19:00:00.000Z	38 \| good	3.88 \| good	16.972 \| good	41.083 \| good	0.182 \| good	0.489 \| good	0.144 \| good
2025-09-06T20:00:00.000Z	40 \| good	4.322 \| good	18.943 \| good	42.729 \| good	0.172 \| good	0.494 \| good	0.143 \| good
2025-09-06T21:00:00.000Z	43 \| good	3.832 \| good	16.626 \| good	45.997 \| good	0.162 \| good	0.5 \| good	0.143 \| good
2025-09-06T22:00:00.000Z	44 \| good	4.321 \| good	18.972 \| good	46.926 \| good	0.177 \| good	1.164 \| good	0.148 \| good
2025-09-06T23:00:00.000Z	43 \| good	4.673 \| good	20.3 \| good	45.729 \| good	0.192 \| good	1.827 \| good	0.153 \| good
2025-09-07T00:00:00.000Z	38 \| good	3.91 \| good	17.079 \| good	41.29 \| good	0.207 \| good	2.491 \| good	0.158 \| good
2025-09-07T01:00:00.000Z	32 \| good	4.17 \| good	17.952 \| good	34.617 \| good	0.257 \| good	5.475 \| good	0.187 \| good
2025-09-07T02:00:00.000Z	29 \| good	4.658 \| good	20.757 \| good	31.282 \| good	0.307 \| good	8.459 \| good	0.216 \| good
2025-09-07T03:00:00.000Z	28 \| good	3.89 \| good	17.009 \| good	30.196 \| good	0.358 \| good	11.442 \| good	0.244 \| good
2025-09-07T04:00:00.000Z	27 \| good	4.774 \| good	20.528 \| good	27.75 \| good	0.347 \| good	10.528 \| good	0.236 \| good
2025-09-07T05:00:00.000Z	33 \| good	6.344 \| good	28.341 \| good	23.278 \| good	0.337 \| good	9.614 \| good	0.228 \| good
2025-09-07T06:00:00.000Z	44 \| good	7.99 \| good	34.957 \| good	21.797 \| good	0.327 \| good	8.699 \| good	0.22 \| good
2025-09-07T07:00:00.000Z	52 \| moderate	9.631 \| good	42.867 \| good	18.613 \| good	0.34 \| good	7.768 \| good	0.213 \| good
2025-09-07T08:00:00.000Z	52 \| moderate	10.049 \| good	44.798 \| good	15.804 \| good	0.353 \| good	6.837 \| good	0.207 \| good
2025-09-07T09:00:00.000Z	52 \| moderate	10.195 \| good	45 \| good	15.21 \| good	0.366 \| good	5.905 \| good	0.201 \| good
2025-09-07T10:00:00.000Z	56 \| moderate	12.05 \| good	54.012 \| good	12.974 \| good	0.372 \| good	5.534 \| good	0.197 \| good
2025-09-07T11:00:00.000Z	54 \| moderate	10.528 \| good	46.793 \| good	13.893 \| good	0.379 \| good	5.163 \| good	0.194 \| good
2025-09-07T12:00:00.000Z	54 \| moderate	11.246 \| good	49.767 \| good	13.762 \| good	0.386 \| good	4.792 \| good	0.19 \| good
2025-09-07T13:00:00.000Z	56 \| moderate	11.992 \| good	53.351 \| good	19.437 \| good	0.427 \| good	3.871 \| good	0.186 \| good
2025-09-07T14:00:00.000Z	58 \| moderate	13.145 \| fine	59.107 \| fine	27.508 \| good	0.467 \| good	2.95 \| good	0.181 \| good
2025-09-07T15:00:00.000Z	54 \| moderate	10.74 \| good	48 \| good	32.753 \| good	0.508 \| good	2.029 \| good	0.176 \| good

O'Fallon

Empower business decisions with accurate air quality data

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

0.29ppm

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 03:00:00 on 2025-09-05.

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 07:00:00 on 2025-09-05.

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

The real-time air quality index in O'fallon, Missouri is 60, currently categorized as Moderate.

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 13.92 μg/m³.

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

The current PM₁₀ levels in O'fallon, Missouri are 66.394 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 0.286 ppm.

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

The current sulfur dioxide (SO₂) levels in O'fallon, Missouri are 0.467 ppb.

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

The current ozone (O₃) levels at O'fallon, Missouri is 23.454 ppm.

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

The current nitrogen dioxide (NO₂) levels at O'fallon, Missouri is 3.59 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-03T21:00:00.000Z	44 \| good	4.702 \| good	16.834 \| good	47.044 \| good	1.105 \| good	4.901 \| good	0.193 \| good
2025-09-03T22:00:00.000Z	43 \| good	4.628 \| good	18.453 \| good	46.307 \| good	1.071 \| good	3.94 \| good	0.193 \| good
2025-09-03T23:00:00.000Z	44 \| good	6.022 \| good	22.668 \| good	47.928 \| good	1.176 \| good	4.064 \| good	0.246 \| good
2025-09-04T00:00:00.000Z	44 \| good	5.546 \| good	23.405 \| good	46.708 \| good	0.544 \| good	5.717 \| good	0.193 \| good
2025-09-04T01:00:00.000Z	60 \| moderate	5.441 \| good	73.256 \| fine	41.933 \| good	0.486 \| good	2.532 \| good	0.193 \| good
2025-09-04T02:00:00.000Z	35 \| good	5.282 \| good	31.163 \| good	38.048 \| good	0.683 \| good	2.632 \| good	0.189 \| good
2025-09-04T03:00:00.000Z	31 \| good	4.807 \| good	21.546 \| good	33.883 \| good	0.746 \| good	2.838 \| good	0.237 \| good
2025-09-04T04:00:00.000Z	29 \| good	4.732 \| good	24.353 \| good	30.831 \| good	0.681 \| good	2.05 \| good	0.193 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.395 \| good	26.187 \| good	27.104 \| good	0.639 \| good	1.689 \| good	0.193 \| good
2025-09-04T06:00:00.000Z	52 \| moderate	9.545 \| good	48.561 \| good	25.915 \| good	0.383 \| good	1.43 \| good	0.193 \| good
2025-09-04T07:00:00.000Z	44 \| good	7.584 \| good	38.775 \| good	25.602 \| good	0.386 \| good	1.432 \| good	0.193 \| good
2025-09-04T08:00:00.000Z	52 \| moderate	10.363 \| good	58.321 \| fine	24.607 \| good	0.388 \| good	1.435 \| good	0.193 \| good
2025-09-04T09:00:00.000Z	62 \| moderate	15.231 \| fine	70.046 \| fine	17.726 \| good	0.587 \| good	2.443 \| good	0.234 \| good
2025-09-04T10:00:00.000Z	64 \| moderate	16.167 \| fine	68.103 \| fine	19.099 \| good	0.402 \| good	2.718 \| good	0.229 \| good
2025-09-04T11:00:00.000Z	64 \| moderate	15.816 \| fine	40.55 \| good	19.007 \| good	0.751 \| good	3.98 \| good	0.234 \| good
2025-09-04T12:00:00.000Z	62 \| moderate	14.866 \| fine	64.812 \| fine	19.495 \| good	0.344 \| good	4.879 \| good	0.281 \| good
2025-09-04T13:00:00.000Z	64 \| moderate	16.155 \| fine	71.008 \| fine	26.713 \| good	0.38 \| good	2.524 \| good	0.209 \| good
2025-09-04T14:00:00.000Z	64 \| moderate	15.751 \| fine	72.747 \| fine	22.295 \| good	0.378 \| good	3.611 \| good	0.298 \| good
2025-09-04T15:00:00.000Z	54 \| moderate	10.946 \| good	40.902 \| good	21.322 \| good	0.633 \| good	2.825 \| good	0.291 \| good
2025-09-04T16:00:00.000Z	58 \| moderate	12.713 \| fine	58.336 \| fine	26.625 \| good	0.516 \| good	3.183 \| good	0.245 \| good
2025-09-04T17:00:00.000Z	64 \| moderate	15.569 \| fine	68.92 \| fine	29.389 \| good	0.559 \| good	3.063 \| good	0.245 \| good
2025-09-04T18:00:00.000Z	60 \| moderate	13.798 \| fine	63.672 \| fine	34.301 \| good	0.592 \| good	3.966 \| good	0.287 \| good
2025-09-04T19:00:00.000Z	56 \| moderate	12.183 \| fine	33.572 \| good	35.41 \| good	0.592 \| good	4.098 \| good	0.285 \| good
2025-09-04T20:00:00.000Z	56 \| moderate	11.977 \| good	53.469 \| good	36.094 \| good	0.962 \| good	4.266 \| good	0.291 \| good
2025-09-04T21:00:00.000Z	58 \| moderate	12.672 \| fine	50.202 \| good	37.763 \| good	0.746 \| good	4.736 \| good	0.291 \| good
2025-09-04T22:00:00.000Z	64 \| moderate	16.329 \| fine	69.845 \| fine	40.127 \| good	2.721 \| good	4.154 \| good	0.291 \| good
2025-09-04T23:00:00.000Z	56 \| moderate	11.508 \| good	56.317 \| fine	41.235 \| good	6.489 \| good	4.464 \| good	0.296 \| good
2025-09-05T00:00:00.000Z	62 \| moderate	14.995 \| fine	76.23 \| fine	41.233 \| good	3.762 \| good	5.856 \| good	0.26 \| good
2025-09-05T01:00:00.000Z	64 \| moderate	15.658 \| fine	66.65 \| fine	33.185 \| good	3.414 \| good	8.272 \| good	0.347 \| good
2025-09-05T02:00:00.000Z	62 \| moderate	15.05 \| fine	56.521 \| fine	38.637 \| good	3.032 \| good	10.919 \| good	0.378 \| good
2025-09-05T03:00:00.000Z	62 \| moderate	13.227 \| fine	77.997 \| fine	30.076 \| good	2.409 \| good	16.385 \| good	0.34 \| good
2025-09-05T04:00:00.000Z	58 \| moderate	10.873 \| good	69.896 \| fine	28.072 \| good	1.61 \| good	9.42 \| good	0.336 \| good
2025-09-05T05:00:00.000Z	58 \| moderate	13.343 \| fine	58.534 \| fine	23.594 \| good	0.981 \| good	9.676 \| good	0.336 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	10.079 \| good	55.443 \| fine	22.937 \| good	0.698 \| good	10.368 \| good	0.285 \| good
2025-09-05T07:00:00.000Z	56 \| moderate	11.527 \| good	55.801 \| fine	21.972 \| good	0.705 \| good	9.981 \| good	0.285 \| good
2025-09-05T08:00:00.000Z	58 \| moderate	13.273 \| fine	51.171 \| good	19.664 \| good	0.711 \| good	9.932 \| good	0.285 \| good
2025-09-05T09:00:00.000Z	60 \| moderate	13.686 \| fine	49.583 \| good	17.281 \| good	1.022 \| good	6.571 \| good	0.276 \| good
2025-09-05T10:00:00.000Z	62 \| moderate	14.527 \| fine	60.347 \| fine	17.927 \| good	0.958 \| good	4.099 \| good	0.276 \| good
2025-09-05T11:00:00.000Z	58 \| moderate	13.195 \| fine	41.818 \| good	14.152 \| good	0.865 \| good	5.888 \| good	0.281 \| good
2025-09-05T12:00:00.000Z	56 \| moderate	12.383 \| fine	55.764 \| fine	20.201 \| good	0.464 \| good	5.093 \| good	0.27 \| good
2025-09-05T13:00:00.000Z	58 \| moderate	12.981 \| fine	55.949 \| fine	22.299 \| good	0.424 \| good	4.971 \| good	0.281 \| good
2025-09-05T14:00:00.000Z	62 \| moderate	14.7 \| fine	72.116 \| fine	23.56 \| good	0.433 \| good	3.677 \| good	0.287 \| good
2025-09-05T15:00:00.000Z	49 \| good	9.041 \| good	42.737 \| good	24.099 \| good	0.456 \| good	2.788 \| good	0.336 \| good
2025-09-05T16:00:00.000Z	52 \| moderate	10.236 \| good	46.494 \| good	26.791 \| good	0.29 \| good	2.08 \| good	0.291 \| good
2025-09-05T17:00:00.000Z	52 \| moderate	9.767 \| good	49.114 \| good	28.104 \| good	0.308 \| good	2.175 \| good	0.287 \| good
2025-09-05T18:00:00.000Z	54 \| moderate	11.216 \| good	46.759 \| good	29.809 \| good	0.321 \| good	2.736 \| good	0.229 \| good
2025-09-05T19:00:00.000Z	52 \| moderate	10.319 \| good	53.195 \| good	30.056 \| good	0.498 \| good	3.092 \| good	0.228 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.825 \| good	37.971 \| good	29.614 \| good	0.546 \| good	1.828 \| good	0.27 \| good
2025-09-05T20:00:00.000Z	52 \| moderate	10.346 \| good	54.239 \| good	30.964 \| good	0.541 \| good	2.944 \| good	0.227 \| good
2025-09-05T16:00:00.000Z	38 \| good	6.694 \| good	29.852 \| good	37.226 \| good	0.335 \| good	1.659 \| good	0.199 \| good
2025-09-05T17:00:00.000Z	35 \| good	6.302 \| good	28.037 \| good	37.765 \| good	0.309 \| good	1.313 \| good	0.182 \| good
2025-09-05T18:00:00.000Z	33 \| good	5.898 \| good	25.88 \| good	34.409 \| good	0.282 \| good	0.967 \| good	0.166 \| good
2025-09-05T19:00:00.000Z	33 \| good	6.449 \| good	29.02 \| good	31.398 \| good	0.289 \| good	1.043 \| good	0.164 \| good
2025-09-05T20:00:00.000Z	38 \| good	6.977 \| good	30.865 \| good	28.927 \| good	0.296 \| good	1.12 \| good	0.162 \| good
2025-09-05T21:00:00.000Z	28 \| good	4.858 \| good	20.929 \| good	30.2 \| good	0.303 \| good	1.196 \| good	0.161 \| good
2025-09-05T22:00:00.000Z	29 \| good	3.909 \| good	17.258 \| good	31.486 \| good	0.314 \| good	1.745 \| good	0.168 \| good
2025-09-05T23:00:00.000Z	31 \| good	3.013 \| good	12.95 \| good	34.415 \| good	0.325 \| good	2.294 \| good	0.175 \| good
2025-09-06T00:00:00.000Z	32 \| good	0.704 \| good	2.602 \| good	34.851 \| good	0.336 \| good	2.843 \| good	0.181 \| good
2025-09-06T01:00:00.000Z	35 \| good	0.711 \| good	2.369 \| good	38.385 \| good	0.312 \| good	2.706 \| good	0.182 \| good
2025-09-06T02:00:00.000Z	34 \| good	1.12 \| good	4.622 \| good	36.948 \| good	0.287 \| good	2.57 \| good	0.182 \| good
2025-09-06T03:00:00.000Z	31 \| good	3.549 \| good	15.595 \| good	32.938 \| good	0.262 \| good	2.434 \| good	0.183 \| good
2025-09-06T04:00:00.000Z	27 \| good	5.099 \| good	21.897 \| good	26.283 \| good	0.261 \| good	2.56 \| good	0.185 \| good
2025-09-06T05:00:00.000Z	33 \| good	5.9 \| good	26.629 \| good	23.372 \| good	0.26 \| good	2.686 \| good	0.187 \| good
2025-09-06T06:00:00.000Z	44 \| good	8.285 \| good	36.774 \| good	21.551 \| good	0.259 \| good	2.812 \| good	0.189 \| good
2025-09-06T07:00:00.000Z	49 \| good	9.315 \| good	41.277 \| good	19.262 \| good	0.264 \| good	3.118 \| good	0.184 \| good
2025-09-06T08:00:00.000Z	44 \| good	8.437 \| good	36.997 \| good	17.176 \| good	0.269 \| good	3.424 \| good	0.18 \| good
2025-09-06T09:00:00.000Z	44 \| good	7.569 \| good	33.3 \| good	14.764 \| good	0.275 \| good	3.73 \| good	0.175 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	9.992 \| good	44.293 \| good	11.032 \| good	0.298 \| good	4.76 \| good	0.181 \| good
2025-09-06T11:00:00.000Z	49 \| good	8.89 \| good	39.463 \| good	10.392 \| good	0.321 \| good	5.789 \| good	0.186 \| good
2025-09-06T12:00:00.000Z	52 \| moderate	9.842 \| good	43.617 \| good	10.948 \| good	0.344 \| good	6.819 \| good	0.192 \| good
2025-09-06T13:00:00.000Z	54 \| moderate	10.861 \| good	48.17 \| good	17.089 \| good	0.399 \| good	5.177 \| good	0.184 \| good
2025-09-06T14:00:00.000Z	49 \| good	8.864 \| good	39.316 \| good	26.6 \| good	0.454 \| good	3.536 \| good	0.176 \| good
2025-09-06T15:00:00.000Z	32 \| good	3.185 \| good	13.801 \| good	34.97 \| good	0.508 \| good	1.894 \| good	0.168 \| good
2025-09-06T16:00:00.000Z	35 \| good	2.897 \| good	11.83 \| good	38.169 \| good	0.403 \| good	1.424 \| good	0.16 \| good
2025-09-06T17:00:00.000Z	37 \| good	2.692 \| good	11.036 \| good	39.742 \| good	0.297 \| good	0.953 \| good	0.152 \| good
2025-09-06T18:00:00.000Z	37 \| good	3.124 \| good	12.961 \| good	39.507 \| good	0.191 \| good	0.483 \| good	0.144 \| good
2025-09-06T19:00:00.000Z	38 \| good	3.88 \| good	16.972 \| good	41.083 \| good	0.182 \| good	0.489 \| good	0.144 \| good
2025-09-06T20:00:00.000Z	40 \| good	4.322 \| good	18.943 \| good	42.729 \| good	0.172 \| good	0.494 \| good	0.143 \| good
2025-09-06T21:00:00.000Z	43 \| good	3.832 \| good	16.626 \| good	45.997 \| good	0.162 \| good	0.5 \| good	0.143 \| good
2025-09-06T22:00:00.000Z	44 \| good	4.321 \| good	18.972 \| good	46.926 \| good	0.177 \| good	1.164 \| good	0.148 \| good
2025-09-06T23:00:00.000Z	43 \| good	4.673 \| good	20.3 \| good	45.729 \| good	0.192 \| good	1.827 \| good	0.153 \| good
2025-09-07T00:00:00.000Z	38 \| good	3.91 \| good	17.079 \| good	41.29 \| good	0.207 \| good	2.491 \| good	0.158 \| good
2025-09-07T01:00:00.000Z	32 \| good	4.17 \| good	17.952 \| good	34.617 \| good	0.257 \| good	5.475 \| good	0.187 \| good
2025-09-07T02:00:00.000Z	29 \| good	4.658 \| good	20.757 \| good	31.282 \| good	0.307 \| good	8.459 \| good	0.216 \| good
2025-09-07T03:00:00.000Z	28 \| good	3.89 \| good	17.009 \| good	30.196 \| good	0.358 \| good	11.442 \| good	0.244 \| good
2025-09-07T04:00:00.000Z	27 \| good	4.774 \| good	20.528 \| good	27.75 \| good	0.347 \| good	10.528 \| good	0.236 \| good
2025-09-07T05:00:00.000Z	33 \| good	6.344 \| good	28.341 \| good	23.278 \| good	0.337 \| good	9.614 \| good	0.228 \| good
2025-09-07T06:00:00.000Z	44 \| good	7.99 \| good	34.957 \| good	21.797 \| good	0.327 \| good	8.699 \| good	0.22 \| good
2025-09-07T07:00:00.000Z	52 \| moderate	9.631 \| good	42.867 \| good	18.613 \| good	0.34 \| good	7.768 \| good	0.213 \| good
2025-09-07T08:00:00.000Z	52 \| moderate	10.049 \| good	44.798 \| good	15.804 \| good	0.353 \| good	6.837 \| good	0.207 \| good
2025-09-07T09:00:00.000Z	52 \| moderate	10.195 \| good	45 \| good	15.21 \| good	0.366 \| good	5.905 \| good	0.201 \| good
2025-09-07T10:00:00.000Z	56 \| moderate	12.05 \| good	54.012 \| good	12.974 \| good	0.372 \| good	5.534 \| good	0.197 \| good
2025-09-07T11:00:00.000Z	54 \| moderate	10.528 \| good	46.793 \| good	13.893 \| good	0.379 \| good	5.163 \| good	0.194 \| good
2025-09-07T12:00:00.000Z	54 \| moderate	11.246 \| good	49.767 \| good	13.762 \| good	0.386 \| good	4.792 \| good	0.19 \| good
2025-09-07T13:00:00.000Z	56 \| moderate	11.992 \| good	53.351 \| good	19.437 \| good	0.427 \| good	3.871 \| good	0.186 \| good
2025-09-07T14:00:00.000Z	58 \| moderate	13.145 \| fine	59.107 \| fine	27.508 \| good	0.467 \| good	2.95 \| good	0.181 \| good
2025-09-07T15:00:00.000Z	54 \| moderate	10.74 \| good	48 \| good	32.753 \| good	0.508 \| good	2.029 \| good	0.176 \| 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?