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

The current PM10 levels in O'fallon, Missouri are 33.369 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 1.49 ppb.

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

The current ozone (O3) levels at O'fallon, Missouri is 49.649 ppm.

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

The current nitrogen dioxide (NO2) levels at O'fallon, Missouri is 6.519 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 9.204 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)

9.20 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

33.37 μg/m³

155

255

425

605+

Ozone (O₃)

49.65 ppb

201

201+

Sulfur Dioxide (SO₂)

1.49 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.52 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
2026-10-21T00:00:00.000Z	43 \| good	5.813 \| good	27.331 \| good	45.975 \| good	1.208 \| good	12.333 \| good	0.417 \| good
2026-10-21T01:00:00.000Z	47 \| good	7.827 \| good	50.572 \| good	39.953 \| good	0.886 \| good	13.204 \| good	0.622 \| good
2026-10-21T02:00:00.000Z	54 \| moderate	11.048 \| good	52.285 \| good	30.684 \| good	0.935 \| good	19.196 \| good	0.642 \| good
2026-10-21T03:00:00.000Z	73 \| moderate	20.754 \| fine	91.166 \| fine	13.179 \| good	1.849 \| good	21.735 \| good	0.271 \| good
2026-10-21T04:00:00.000Z	58 \| moderate	12.614 \| fine	63.172 \| fine	24.848 \| good	0.945 \| good	31.172 \| good	0.599 \| good
2026-10-21T05:00:00.000Z	66 \| moderate	17.123 \| fine	77.526 \| fine	20.964 \| good	0.903 \| good	32.317 \| good	0.766 \| good
2026-10-21T06:00:00.000Z	64 \| moderate	15.645 \| fine	39.506 \| good	18.208 \| good	1.005 \| good	30.49 \| good	0.885 \| good
2026-10-21T07:00:00.000Z	62 \| moderate	15.248 \| fine	41.103 \| good	16.448 \| good	1.005 \| good	28.368 \| good	0.885 \| good
2026-10-21T08:00:00.000Z	62 \| moderate	14.812 \| fine	60.648 \| fine	16.302 \| good	1.002 \| good	24.142 \| good	0.885 \| good
2026-10-21T09:00:00.000Z	62 \| moderate	15.41 \| fine	65.822 \| fine	9.245 \| good	0.876 \| good	18.452 \| good	0.769 \| good
2026-10-21T10:00:00.000Z	56 \| moderate	12.135 \| fine	33.965 \| good	12.36 \| good	0.657 \| good	18.213 \| good	0.753 \| good
2026-10-21T11:00:00.000Z	44 \| good	8.106 \| good	32.852 \| good	7.75 \| good	0.897 \| good	10.029 \| good	0.718 \| good
2026-10-21T12:00:00.000Z	52 \| moderate	10.103 \| good	28.292 \| good	13.169 \| good	1.04 \| good	13.128 \| good	0.81 \| good
2026-10-21T13:00:00.000Z	44 \| good	8.353 \| good	47.06 \| good	10.214 \| good	1.026 \| good	14.278 \| good	0.815 \| good
2026-10-21T14:00:00.000Z	58 \| moderate	12.519 \| fine	62.574 \| fine	8.996 \| good	1.221 \| good	19.897 \| good	0.966 \| good
2026-10-21T15:00:00.000Z	69 \| moderate	18.982 \| fine	77.582 \| fine	10.425 \| good	1.214 \| good	16.757 \| good	0.698 \| good
2026-10-21T16:00:00.000Z	64 \| moderate	15.945 \| fine	54.221 \| good	19.945 \| good	0.891 \| good	14.055 \| good	0.516 \| good
2026-10-21T17:00:00.000Z	56 \| moderate	12.357 \| fine	51.566 \| good	24.974 \| good	4.534 \| good	12.694 \| good	0.407 \| good
2026-10-21T18:00:00.000Z	44 \| good	7.989 \| good	41.012 \| good	39.002 \| good	3.773 \| good	8.976 \| good	0.291 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.803 \| good	40.316 \| good	42.338 \| good	1.816 \| good	9.473 \| good	0.294 \| good
2026-10-21T20:00:00.000Z	44 \| good	6.539 \| good	25.811 \| good	48.362 \| good	1.331 \| good	7.272 \| good	0.249 \| good
2026-10-21T21:00:00.000Z	48 \| good	6.458 \| good	23.101 \| good	51.703 \| good	1.208 \| good	5.896 \| good	0.248 \| good
2026-10-21T22:00:00.000Z	47 \| good	5.638 \| good	21.745 \| good	51.033 \| good	1.086 \| good	5.392 \| good	0.234 \| good
2026-10-21T23:00:00.000Z	45 \| good	5.209 \| good	33.135 \| good	49.325 \| good	0.942 \| good	7.63 \| good	0.234 \| good
2026-10-22T00:00:00.000Z	45 \| good	6.651 \| good	27.577 \| good	48.757 \| good	0.893 \| good	16.755 \| good	0.286 \| good
2026-10-22T01:00:00.000Z	45 \| good	8.115 \| good	29.734 \| good	49.267 \| good	0.897 \| good	30.945 \| good	0.622 \| good
2026-10-22T02:00:00.000Z	52 \| moderate	9.548 \| good	48.831 \| good	40.972 \| good	0.774 \| good	35.624 \| good	0.66 \| good
2026-10-22T03:00:00.000Z	38 \| good	7.484 \| good	33.12 \| good	21.638 \| good	3.118 \| good	38.169 \| good	0.427 \| good
2026-10-22T04:00:00.000Z	49 \| good	8.988 \| good	38.136 \| good	27.594 \| good	1.017 \| good	25.62 \| good	0.897 \| good
2026-10-22T05:00:00.000Z	42 \| good	6.317 \| good	44.733 \| good	16.664 \| good	0.811 \| good	22.97 \| good	0.915 \| good
2026-10-22T06:00:00.000Z	52 \| moderate	9.638 \| good	36.514 \| good	26.669 \| good	0.708 \| good	16.815 \| good	0.873 \| good
2026-10-22T07:00:00.000Z	56 \| moderate	11.751 \| good	35.205 \| good	19.368 \| good	0.717 \| good	15.507 \| good	0.873 \| good
2026-10-22T08:00:00.000Z	58 \| moderate	13.493 \| fine	34.817 \| good	18.452 \| good	0.721 \| good	15.627 \| good	0.82 \| good
2026-10-22T09:00:00.000Z	54 \| moderate	10.589 \| good	55.588 \| fine	9.21 \| good	0.722 \| good	17.095 \| good	0.767 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.762 \| good	44.265 \| good	11.614 \| good	0.746 \| good	13.904 \| good	0.674 \| good
2026-10-22T11:00:00.000Z	44 \| good	8.384 \| good	42.797 \| good	6.489 \| good	0.664 \| good	17.001 \| good	0.713 \| good
2026-10-22T12:00:00.000Z	33 \| good	6.432 \| good	35.633 \| good	9.016 \| good	0.731 \| good	15.297 \| good	0.766 \| good
2026-10-22T13:00:00.000Z	46 \| good	7.382 \| good	49.934 \| good	5.538 \| good	0.717 \| good	13.586 \| good	0.736 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	9.826 \| good	62.405 \| fine	8.155 \| good	0.739 \| good	20.055 \| good	0.823 \| good
2026-10-22T15:00:00.000Z	54 \| moderate	10.614 \| good	54.291 \| good	11.938 \| good	0.917 \| good	22.908 \| good	0.757 \| good
2026-10-22T16:00:00.000Z	58 \| moderate	10.373 \| good	68.541 \| fine	18.209 \| good	0.933 \| good	18.691 \| good	0.684 \| good
2026-10-22T17:00:00.000Z	66 \| moderate	15.339 \| fine	85.346 \| fine	26.38 \| good	2.981 \| good	15.595 \| good	0.517 \| good
2026-10-22T18:00:00.000Z	64 \| moderate	16.38 \| fine	76.603 \| fine	41.45 \| good	3.385 \| good	10.026 \| good	0.46 \| good
2026-10-22T19:00:00.000Z	67 \| moderate	18.265 \| fine	85.311 \| fine	48.46 \| good	2.986 \| good	7.095 \| good	0.37 \| good
2026-10-22T20:00:00.000Z	56 \| moderate	11.826 \| good	65.83 \| fine	52.805 \| good	1.721 \| good	6.85 \| good	0.193 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	8.671 \| good	35.607 \| good	54.913 \| good	1.432 \| good	4.68 \| good	0.193 \| good
2026-10-22T22:00:00.000Z	61 \| moderate	7.481 \| good	38.837 \| good	58.197 \| fine	1.422 \| good	4.707 \| good	0.193 \| good
2026-10-22T23:00:00.000Z	49 \| good	9.204 \| good	33.369 \| good	49.649 \| good	1.49 \| good	6.519 \| good	0.193 \| good
2026-10-22T23:00:00.000Z	49 \| good	9.204 \| good	33.369 \| good	49.649 \| good	1.49 \| good	6.519 \| good	0.193 \| good
2026-10-23T00:00:00.000Z	71 \| moderate	19.835 \| fine	87.65 \| fine	42.222 \| good	2.228 \| good	19.171 \| good	0.301 \| good
2026-10-23T01:00:00.000Z	75 \| moderate	21.844 \| fine	96.131 \| fine	26.868 \| good	2.415 \| good	26.762 \| good	0.349 \| good
2026-10-23T02:00:00.000Z	79 \| moderate	23.947 \| fine	104.474 \| fine	21.49 \| good	2.562 \| good	30.758 \| good	0.381 \| good
2026-10-23T03:00:00.000Z	77 \| moderate	23.358 \| fine	101.9 \| fine	18.058 \| good	2.659 \| good	33.823 \| good	0.408 \| good
2026-10-23T04:00:00.000Z	71 \| moderate	20.006 \| fine	88.557 \| fine	16.49 \| good	2.683 \| good	36.464 \| good	0.432 \| good
2026-10-23T05:00:00.000Z	67 \| moderate	17.649 \| fine	78.411 \| fine	15.197 \| good	2.587 \| good	37.077 \| good	0.441 \| good
2026-10-23T06:00:00.000Z	64 \| moderate	16.143 \| fine	72.02 \| fine	13.744 \| good	2.368 \| good	34.695 \| good	0.427 \| good
2026-10-23T07:00:00.000Z	62 \| moderate	15.038 \| fine	67.432 \| fine	11.596 \| good	2.153 \| good	31.046 \| good	0.4 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	14.441 \| fine	64.989 \| fine	11.794 \| good	1.938 \| good	26.493 \| good	0.368 \| good
2026-10-23T09:00:00.000Z	62 \| moderate	14.615 \| fine	65.379 \| fine	11.474 \| good	1.724 \| good	22.104 \| good	0.34 \| good
2026-10-23T10:00:00.000Z	62 \| moderate	14.995 \| fine	67.007 \| fine	12.147 \| good	1.538 \| good	19.032 \| good	0.319 \| good
2026-10-23T11:00:00.000Z	64 \| moderate	16.272 \| fine	72.544 \| fine	9.719 \| good	1.395 \| good	17.22 \| good	0.305 \| good
2026-10-23T12:00:00.000Z	67 \| moderate	17.71 \| fine	78.404 \| fine	6.391 \| good	1.319 \| good	17.179 \| good	0.301 \| good
2026-10-23T13:00:00.000Z	73 \| moderate	20.676 \| fine	90.877 \| fine	9.631 \| good	1.3 \| good	17.503 \| good	0.314 \| good
2026-10-23T14:00:00.000Z	75 \| moderate	22.276 \| fine	97.141 \| fine	20.667 \| good	1.242 \| good	12.706 \| good	0.301 \| good
2026-10-23T15:00:00.000Z	69 \| moderate	19.407 \| fine	85.578 \| fine	30.507 \| good	1.356 \| good	9.448 \| good	0.268 \| good
2026-10-23T16:00:00.000Z	64 \| moderate	15.662 \| fine	69.63 \| fine	41.802 \| good	1.773 \| good	6.69 \| good	0.235 \| good
2026-10-23T17:00:00.000Z	56 \| moderate	11.926 \| good	53.029 \| good	49.636 \| good	2.355 \| good	4.359 \| good	0.207 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	11.876 \| good	52.454 \| good	53.101 \| good	2.447 \| good	2.582 \| good	0.188 \| good
2026-10-23T19:00:00.000Z	56 \| moderate	11.993 \| good	54.125 \| good	56.051 \| fine	2.209 \| good	1.884 \| good	0.181 \| good
2026-10-23T20:00:00.000Z	61 \| moderate	11.956 \| good	53.869 \| good	58.182 \| fine	2.087 \| good	1.693 \| good	0.18 \| good
2026-10-23T21:00:00.000Z	64 \| moderate	11.756 \| good	52.104 \| good	59.058 \| fine	2.032 \| good	1.816 \| good	0.181 \| good
2026-10-23T22:00:00.000Z	62 \| moderate	14.624 \| fine	65.334 \| fine	53.57 \| good	1.956 \| good	2.71 \| good	0.187 \| good
2026-10-23T23:00:00.000Z	69 \| moderate	18.567 \| fine	81.623 \| fine	41.544 \| good	1.844 \| good	5.684 \| good	0.207 \| good
2026-10-24T00:00:00.000Z	73 \| moderate	20.741 \| fine	91.309 \| fine	31.99 \| good	1.775 \| good	8.716 \| good	0.227 \| good
2026-10-24T01:00:00.000Z	71 \| moderate	20.16 \| fine	88.177 \| fine	25.074 \| good	1.696 \| good	9.591 \| good	0.23 \| good
2026-10-24T02:00:00.000Z	67 \| moderate	17.938 \| fine	79.824 \| fine	25.585 \| good	1.61 \| good	9.687 \| good	0.229 \| good
2026-10-24T03:00:00.000Z	66 \| moderate	16.502 \| fine	73.694 \| fine	24.067 \| good	1.539 \| good	9.291 \| good	0.226 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	15.065 \| fine	67.591 \| fine	25.17 \| good	1.485 \| good	8.76 \| good	0.223 \| good
2026-10-24T05:00:00.000Z	60 \| moderate	13.783 \| fine	61.812 \| fine	25.379 \| good	1.433 \| good	7.963 \| good	0.22 \| good
2026-10-24T06:00:00.000Z	58 \| moderate	13.477 \| fine	61.027 \| fine	23.916 \| good	1.38 \| good	7.109 \| good	0.217 \| good
2026-10-24T07:00:00.000Z	56 \| moderate	12.161 \| fine	54.498 \| good	20.48 \| good	1.332 \| good	6.583 \| good	0.215 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	11.63 \| good	51.688 \| good	18.536 \| good	1.284 \| good	6.376 \| good	0.215 \| good
2026-10-24T09:00:00.000Z	56 \| moderate	11.506 \| good	50.943 \| good	17.023 \| good	1.24 \| good	6.429 \| good	0.216 \| good
2026-10-24T10:00:00.000Z	56 \| moderate	11.532 \| good	50.962 \| good	13.926 \| good	1.207 \| good	6.645 \| good	0.218 \| good
2026-10-24T11:00:00.000Z	56 \| moderate	12.151 \| fine	54.673 \| good	12.01 \| good	1.194 \| good	7.044 \| good	0.221 \| good
2026-10-24T12:00:00.000Z	52 \| moderate	10.328 \| good	45.512 \| good	11.207 \| good	1.21 \| good	8.244 \| good	0.228 \| good
2026-10-24T13:00:00.000Z	54 \| moderate	11.372 \| good	50.418 \| good	14.007 \| good	1.239 \| good	9.742 \| good	0.242 \| good
2026-10-24T14:00:00.000Z	60 \| moderate	13.71 \| fine	61.2 \| fine	22.78 \| good	1.23 \| good	8.194 \| good	0.25 \| good
2026-10-24T15:00:00.000Z	56 \| moderate	11.91 \| good	53.485 \| good	30.761 \| good	1.364 \| good	6.397 \| good	0.235 \| good
2026-10-24T16:00:00.000Z	52 \| moderate	9.992 \| good	44.498 \| good	38.335 \| good	1.568 \| good	4.912 \| good	0.218 \| good
2026-10-24T17:00:00.000Z	41 \| good	7.132 \| good	31.72 \| good	44.073 \| good	1.803 \| good	3.757 \| good	0.204 \| good
2026-10-24T18:00:00.000Z	44 \| good	7.348 \| good	32.225 \| good	47.976 \| good	1.947 \| good	2.618 \| good	0.188 \| good
2026-10-24T19:00:00.000Z	49 \| good	9.14 \| good	41.086 \| good	51.941 \| good	2.078 \| good	2.029 \| good	0.178 \| good
2026-10-24T20:00:00.000Z	50 \| good	8.27 \| good	36.464 \| good	54.004 \| good	2.104 \| good	1.828 \| good	0.173 \| good
2026-10-24T21:00:00.000Z	49 \| good	8.935 \| good	39.766 \| good	53.032 \| good	2.059 \| good	1.92 \| good	0.173 \| good
2026-10-24T22:00:00.000Z	54 \| moderate	11.333 \| good	50.219 \| good	50.183 \| good	1.944 \| good	2.9 \| good	0.18 \| good
2026-10-24T23:00:00.000Z	56 \| moderate	12.496 \| fine	56.336 \| fine	43.593 \| good	1.797 \| good	5.92 \| good	0.2 \| good

O'Fallon

Empower business decisions with accurate air quality data

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

0.90ppm

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 07:00:00 on 2026-10-22.

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 2026-10-22.

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

The real-time air quality index in O'fallon, Missouri is 49, 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 9.204 μg/m³.

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

The current PM₁₀ levels in O'fallon, Missouri are 33.369 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 0.193 ppm.

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

The current sulfur dioxide (SO₂) levels in O'fallon, Missouri are 1.49 ppb.

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

The current ozone (O₃) levels at O'fallon, Missouri is 49.649 ppm.

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

The current nitrogen dioxide (NO₂) levels at O'fallon, Missouri is 6.519 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-21T00:00:00.000Z	43 \| good	5.813 \| good	27.331 \| good	45.975 \| good	1.208 \| good	12.333 \| good	0.417 \| good
2026-10-21T01:00:00.000Z	47 \| good	7.827 \| good	50.572 \| good	39.953 \| good	0.886 \| good	13.204 \| good	0.622 \| good
2026-10-21T02:00:00.000Z	54 \| moderate	11.048 \| good	52.285 \| good	30.684 \| good	0.935 \| good	19.196 \| good	0.642 \| good
2026-10-21T03:00:00.000Z	73 \| moderate	20.754 \| fine	91.166 \| fine	13.179 \| good	1.849 \| good	21.735 \| good	0.271 \| good
2026-10-21T04:00:00.000Z	58 \| moderate	12.614 \| fine	63.172 \| fine	24.848 \| good	0.945 \| good	31.172 \| good	0.599 \| good
2026-10-21T05:00:00.000Z	66 \| moderate	17.123 \| fine	77.526 \| fine	20.964 \| good	0.903 \| good	32.317 \| good	0.766 \| good
2026-10-21T06:00:00.000Z	64 \| moderate	15.645 \| fine	39.506 \| good	18.208 \| good	1.005 \| good	30.49 \| good	0.885 \| good
2026-10-21T07:00:00.000Z	62 \| moderate	15.248 \| fine	41.103 \| good	16.448 \| good	1.005 \| good	28.368 \| good	0.885 \| good
2026-10-21T08:00:00.000Z	62 \| moderate	14.812 \| fine	60.648 \| fine	16.302 \| good	1.002 \| good	24.142 \| good	0.885 \| good
2026-10-21T09:00:00.000Z	62 \| moderate	15.41 \| fine	65.822 \| fine	9.245 \| good	0.876 \| good	18.452 \| good	0.769 \| good
2026-10-21T10:00:00.000Z	56 \| moderate	12.135 \| fine	33.965 \| good	12.36 \| good	0.657 \| good	18.213 \| good	0.753 \| good
2026-10-21T11:00:00.000Z	44 \| good	8.106 \| good	32.852 \| good	7.75 \| good	0.897 \| good	10.029 \| good	0.718 \| good
2026-10-21T12:00:00.000Z	52 \| moderate	10.103 \| good	28.292 \| good	13.169 \| good	1.04 \| good	13.128 \| good	0.81 \| good
2026-10-21T13:00:00.000Z	44 \| good	8.353 \| good	47.06 \| good	10.214 \| good	1.026 \| good	14.278 \| good	0.815 \| good
2026-10-21T14:00:00.000Z	58 \| moderate	12.519 \| fine	62.574 \| fine	8.996 \| good	1.221 \| good	19.897 \| good	0.966 \| good
2026-10-21T15:00:00.000Z	69 \| moderate	18.982 \| fine	77.582 \| fine	10.425 \| good	1.214 \| good	16.757 \| good	0.698 \| good
2026-10-21T16:00:00.000Z	64 \| moderate	15.945 \| fine	54.221 \| good	19.945 \| good	0.891 \| good	14.055 \| good	0.516 \| good
2026-10-21T17:00:00.000Z	56 \| moderate	12.357 \| fine	51.566 \| good	24.974 \| good	4.534 \| good	12.694 \| good	0.407 \| good
2026-10-21T18:00:00.000Z	44 \| good	7.989 \| good	41.012 \| good	39.002 \| good	3.773 \| good	8.976 \| good	0.291 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.803 \| good	40.316 \| good	42.338 \| good	1.816 \| good	9.473 \| good	0.294 \| good
2026-10-21T20:00:00.000Z	44 \| good	6.539 \| good	25.811 \| good	48.362 \| good	1.331 \| good	7.272 \| good	0.249 \| good
2026-10-21T21:00:00.000Z	48 \| good	6.458 \| good	23.101 \| good	51.703 \| good	1.208 \| good	5.896 \| good	0.248 \| good
2026-10-21T22:00:00.000Z	47 \| good	5.638 \| good	21.745 \| good	51.033 \| good	1.086 \| good	5.392 \| good	0.234 \| good
2026-10-21T23:00:00.000Z	45 \| good	5.209 \| good	33.135 \| good	49.325 \| good	0.942 \| good	7.63 \| good	0.234 \| good
2026-10-22T00:00:00.000Z	45 \| good	6.651 \| good	27.577 \| good	48.757 \| good	0.893 \| good	16.755 \| good	0.286 \| good
2026-10-22T01:00:00.000Z	45 \| good	8.115 \| good	29.734 \| good	49.267 \| good	0.897 \| good	30.945 \| good	0.622 \| good
2026-10-22T02:00:00.000Z	52 \| moderate	9.548 \| good	48.831 \| good	40.972 \| good	0.774 \| good	35.624 \| good	0.66 \| good
2026-10-22T03:00:00.000Z	38 \| good	7.484 \| good	33.12 \| good	21.638 \| good	3.118 \| good	38.169 \| good	0.427 \| good
2026-10-22T04:00:00.000Z	49 \| good	8.988 \| good	38.136 \| good	27.594 \| good	1.017 \| good	25.62 \| good	0.897 \| good
2026-10-22T05:00:00.000Z	42 \| good	6.317 \| good	44.733 \| good	16.664 \| good	0.811 \| good	22.97 \| good	0.915 \| good
2026-10-22T06:00:00.000Z	52 \| moderate	9.638 \| good	36.514 \| good	26.669 \| good	0.708 \| good	16.815 \| good	0.873 \| good
2026-10-22T07:00:00.000Z	56 \| moderate	11.751 \| good	35.205 \| good	19.368 \| good	0.717 \| good	15.507 \| good	0.873 \| good
2026-10-22T08:00:00.000Z	58 \| moderate	13.493 \| fine	34.817 \| good	18.452 \| good	0.721 \| good	15.627 \| good	0.82 \| good
2026-10-22T09:00:00.000Z	54 \| moderate	10.589 \| good	55.588 \| fine	9.21 \| good	0.722 \| good	17.095 \| good	0.767 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.762 \| good	44.265 \| good	11.614 \| good	0.746 \| good	13.904 \| good	0.674 \| good
2026-10-22T11:00:00.000Z	44 \| good	8.384 \| good	42.797 \| good	6.489 \| good	0.664 \| good	17.001 \| good	0.713 \| good
2026-10-22T12:00:00.000Z	33 \| good	6.432 \| good	35.633 \| good	9.016 \| good	0.731 \| good	15.297 \| good	0.766 \| good
2026-10-22T13:00:00.000Z	46 \| good	7.382 \| good	49.934 \| good	5.538 \| good	0.717 \| good	13.586 \| good	0.736 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	9.826 \| good	62.405 \| fine	8.155 \| good	0.739 \| good	20.055 \| good	0.823 \| good
2026-10-22T15:00:00.000Z	54 \| moderate	10.614 \| good	54.291 \| good	11.938 \| good	0.917 \| good	22.908 \| good	0.757 \| good
2026-10-22T16:00:00.000Z	58 \| moderate	10.373 \| good	68.541 \| fine	18.209 \| good	0.933 \| good	18.691 \| good	0.684 \| good
2026-10-22T17:00:00.000Z	66 \| moderate	15.339 \| fine	85.346 \| fine	26.38 \| good	2.981 \| good	15.595 \| good	0.517 \| good
2026-10-22T18:00:00.000Z	64 \| moderate	16.38 \| fine	76.603 \| fine	41.45 \| good	3.385 \| good	10.026 \| good	0.46 \| good
2026-10-22T19:00:00.000Z	67 \| moderate	18.265 \| fine	85.311 \| fine	48.46 \| good	2.986 \| good	7.095 \| good	0.37 \| good
2026-10-22T20:00:00.000Z	56 \| moderate	11.826 \| good	65.83 \| fine	52.805 \| good	1.721 \| good	6.85 \| good	0.193 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	8.671 \| good	35.607 \| good	54.913 \| good	1.432 \| good	4.68 \| good	0.193 \| good
2026-10-22T22:00:00.000Z	61 \| moderate	7.481 \| good	38.837 \| good	58.197 \| fine	1.422 \| good	4.707 \| good	0.193 \| good
2026-10-22T23:00:00.000Z	49 \| good	9.204 \| good	33.369 \| good	49.649 \| good	1.49 \| good	6.519 \| good	0.193 \| good
2026-10-22T23:00:00.000Z	49 \| good	9.204 \| good	33.369 \| good	49.649 \| good	1.49 \| good	6.519 \| good	0.193 \| good
2026-10-23T00:00:00.000Z	71 \| moderate	19.835 \| fine	87.65 \| fine	42.222 \| good	2.228 \| good	19.171 \| good	0.301 \| good
2026-10-23T01:00:00.000Z	75 \| moderate	21.844 \| fine	96.131 \| fine	26.868 \| good	2.415 \| good	26.762 \| good	0.349 \| good
2026-10-23T02:00:00.000Z	79 \| moderate	23.947 \| fine	104.474 \| fine	21.49 \| good	2.562 \| good	30.758 \| good	0.381 \| good
2026-10-23T03:00:00.000Z	77 \| moderate	23.358 \| fine	101.9 \| fine	18.058 \| good	2.659 \| good	33.823 \| good	0.408 \| good
2026-10-23T04:00:00.000Z	71 \| moderate	20.006 \| fine	88.557 \| fine	16.49 \| good	2.683 \| good	36.464 \| good	0.432 \| good
2026-10-23T05:00:00.000Z	67 \| moderate	17.649 \| fine	78.411 \| fine	15.197 \| good	2.587 \| good	37.077 \| good	0.441 \| good
2026-10-23T06:00:00.000Z	64 \| moderate	16.143 \| fine	72.02 \| fine	13.744 \| good	2.368 \| good	34.695 \| good	0.427 \| good
2026-10-23T07:00:00.000Z	62 \| moderate	15.038 \| fine	67.432 \| fine	11.596 \| good	2.153 \| good	31.046 \| good	0.4 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	14.441 \| fine	64.989 \| fine	11.794 \| good	1.938 \| good	26.493 \| good	0.368 \| good
2026-10-23T09:00:00.000Z	62 \| moderate	14.615 \| fine	65.379 \| fine	11.474 \| good	1.724 \| good	22.104 \| good	0.34 \| good
2026-10-23T10:00:00.000Z	62 \| moderate	14.995 \| fine	67.007 \| fine	12.147 \| good	1.538 \| good	19.032 \| good	0.319 \| good
2026-10-23T11:00:00.000Z	64 \| moderate	16.272 \| fine	72.544 \| fine	9.719 \| good	1.395 \| good	17.22 \| good	0.305 \| good
2026-10-23T12:00:00.000Z	67 \| moderate	17.71 \| fine	78.404 \| fine	6.391 \| good	1.319 \| good	17.179 \| good	0.301 \| good
2026-10-23T13:00:00.000Z	73 \| moderate	20.676 \| fine	90.877 \| fine	9.631 \| good	1.3 \| good	17.503 \| good	0.314 \| good
2026-10-23T14:00:00.000Z	75 \| moderate	22.276 \| fine	97.141 \| fine	20.667 \| good	1.242 \| good	12.706 \| good	0.301 \| good
2026-10-23T15:00:00.000Z	69 \| moderate	19.407 \| fine	85.578 \| fine	30.507 \| good	1.356 \| good	9.448 \| good	0.268 \| good
2026-10-23T16:00:00.000Z	64 \| moderate	15.662 \| fine	69.63 \| fine	41.802 \| good	1.773 \| good	6.69 \| good	0.235 \| good
2026-10-23T17:00:00.000Z	56 \| moderate	11.926 \| good	53.029 \| good	49.636 \| good	2.355 \| good	4.359 \| good	0.207 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	11.876 \| good	52.454 \| good	53.101 \| good	2.447 \| good	2.582 \| good	0.188 \| good
2026-10-23T19:00:00.000Z	56 \| moderate	11.993 \| good	54.125 \| good	56.051 \| fine	2.209 \| good	1.884 \| good	0.181 \| good
2026-10-23T20:00:00.000Z	61 \| moderate	11.956 \| good	53.869 \| good	58.182 \| fine	2.087 \| good	1.693 \| good	0.18 \| good
2026-10-23T21:00:00.000Z	64 \| moderate	11.756 \| good	52.104 \| good	59.058 \| fine	2.032 \| good	1.816 \| good	0.181 \| good
2026-10-23T22:00:00.000Z	62 \| moderate	14.624 \| fine	65.334 \| fine	53.57 \| good	1.956 \| good	2.71 \| good	0.187 \| good
2026-10-23T23:00:00.000Z	69 \| moderate	18.567 \| fine	81.623 \| fine	41.544 \| good	1.844 \| good	5.684 \| good	0.207 \| good
2026-10-24T00:00:00.000Z	73 \| moderate	20.741 \| fine	91.309 \| fine	31.99 \| good	1.775 \| good	8.716 \| good	0.227 \| good
2026-10-24T01:00:00.000Z	71 \| moderate	20.16 \| fine	88.177 \| fine	25.074 \| good	1.696 \| good	9.591 \| good	0.23 \| good
2026-10-24T02:00:00.000Z	67 \| moderate	17.938 \| fine	79.824 \| fine	25.585 \| good	1.61 \| good	9.687 \| good	0.229 \| good
2026-10-24T03:00:00.000Z	66 \| moderate	16.502 \| fine	73.694 \| fine	24.067 \| good	1.539 \| good	9.291 \| good	0.226 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	15.065 \| fine	67.591 \| fine	25.17 \| good	1.485 \| good	8.76 \| good	0.223 \| good
2026-10-24T05:00:00.000Z	60 \| moderate	13.783 \| fine	61.812 \| fine	25.379 \| good	1.433 \| good	7.963 \| good	0.22 \| good
2026-10-24T06:00:00.000Z	58 \| moderate	13.477 \| fine	61.027 \| fine	23.916 \| good	1.38 \| good	7.109 \| good	0.217 \| good
2026-10-24T07:00:00.000Z	56 \| moderate	12.161 \| fine	54.498 \| good	20.48 \| good	1.332 \| good	6.583 \| good	0.215 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	11.63 \| good	51.688 \| good	18.536 \| good	1.284 \| good	6.376 \| good	0.215 \| good
2026-10-24T09:00:00.000Z	56 \| moderate	11.506 \| good	50.943 \| good	17.023 \| good	1.24 \| good	6.429 \| good	0.216 \| good
2026-10-24T10:00:00.000Z	56 \| moderate	11.532 \| good	50.962 \| good	13.926 \| good	1.207 \| good	6.645 \| good	0.218 \| good
2026-10-24T11:00:00.000Z	56 \| moderate	12.151 \| fine	54.673 \| good	12.01 \| good	1.194 \| good	7.044 \| good	0.221 \| good
2026-10-24T12:00:00.000Z	52 \| moderate	10.328 \| good	45.512 \| good	11.207 \| good	1.21 \| good	8.244 \| good	0.228 \| good
2026-10-24T13:00:00.000Z	54 \| moderate	11.372 \| good	50.418 \| good	14.007 \| good	1.239 \| good	9.742 \| good	0.242 \| good
2026-10-24T14:00:00.000Z	60 \| moderate	13.71 \| fine	61.2 \| fine	22.78 \| good	1.23 \| good	8.194 \| good	0.25 \| good
2026-10-24T15:00:00.000Z	56 \| moderate	11.91 \| good	53.485 \| good	30.761 \| good	1.364 \| good	6.397 \| good	0.235 \| good
2026-10-24T16:00:00.000Z	52 \| moderate	9.992 \| good	44.498 \| good	38.335 \| good	1.568 \| good	4.912 \| good	0.218 \| good
2026-10-24T17:00:00.000Z	41 \| good	7.132 \| good	31.72 \| good	44.073 \| good	1.803 \| good	3.757 \| good	0.204 \| good
2026-10-24T18:00:00.000Z	44 \| good	7.348 \| good	32.225 \| good	47.976 \| good	1.947 \| good	2.618 \| good	0.188 \| good
2026-10-24T19:00:00.000Z	49 \| good	9.14 \| good	41.086 \| good	51.941 \| good	2.078 \| good	2.029 \| good	0.178 \| good
2026-10-24T20:00:00.000Z	50 \| good	8.27 \| good	36.464 \| good	54.004 \| good	2.104 \| good	1.828 \| good	0.173 \| good
2026-10-24T21:00:00.000Z	49 \| good	8.935 \| good	39.766 \| good	53.032 \| good	2.059 \| good	1.92 \| good	0.173 \| good
2026-10-24T22:00:00.000Z	54 \| moderate	11.333 \| good	50.219 \| good	50.183 \| good	1.944 \| good	2.9 \| good	0.18 \| good
2026-10-24T23:00:00.000Z	56 \| moderate	12.496 \| fine	56.336 \| fine	43.593 \| good	1.797 \| good	5.92 \| good	0.2 \| 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?