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

The current PM10 levels in O'fallon, Missouri are 21.762 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 1.076 ppb.

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

The current ozone (O3) levels at O'fallon, Missouri is 41.228 ppm.

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

The current nitrogen dioxide (NO2) levels at O'fallon, Missouri is 3.128 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 4.914 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)

4.91 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

21.76 μg/m³

155

255

425

605+

Ozone (O₃)

41.23 ppb

201

201+

Sulfur Dioxide (SO₂)

1.08 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.13 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 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
2026-03-13T15:00:00.000Z	34 \| good	4.854 \| good	21.332 \| good	37.176 \| good	1.242 \| good	6.303 \| good	0.277 \| good
2026-03-13T16:00:00.000Z	34 \| good	4.088 \| good	24.057 \| good	36.93 \| good	0.937 \| good	5.635 \| good	0.27 \| good
2026-03-13T17:00:00.000Z	36 \| good	4.557 \| good	28.357 \| good	39.052 \| good	0.944 \| good	5.715 \| good	0.27 \| good
2026-03-13T18:00:00.000Z	37 \| good	4.102 \| good	18.597 \| good	40.207 \| good	1.133 \| good	2.5 \| good	0.188 \| good
2026-03-13T19:00:00.000Z	37 \| good	2.942 \| good	14.336 \| good	39.788 \| good	1.195 \| good	3.403 \| good	0.188 \| good
2026-03-13T20:00:00.000Z	39 \| good	1.58 \| good	11.914 \| good	41.554 \| good	1.247 \| good	3.461 \| good	0.195 \| good
2026-03-13T21:00:00.000Z	38 \| good	4.158 \| good	25.489 \| good	41.15 \| good	1.231 \| good	2.181 \| good	0.147 \| good
2026-03-13T22:00:00.000Z	40 \| good	3.069 \| good	18.068 \| good	42.625 \| good	1.238 \| good	2.482 \| good	0.149 \| good
2026-03-13T23:00:00.000Z	42 \| good	2.565 \| good	14.233 \| good	44.745 \| good	1.283 \| good	2.552 \| good	0.142 \| good
2026-03-14T00:00:00.000Z	40 \| good	3.803 \| good	17.641 \| good	43.22 \| good	1.369 \| good	2.32 \| good	0.142 \| good
2026-03-14T01:00:00.000Z	39 \| good	3.241 \| good	15.53 \| good	41.905 \| good	1.288 \| good	3.567 \| good	0.193 \| good
2026-03-14T02:00:00.000Z	37 \| good	3.574 \| good	14.053 \| good	39.736 \| good	0.856 \| good	4.744 \| good	0.236 \| good
2026-03-14T03:00:00.000Z	33 \| good	2.864 \| good	19.437 \| good	36.22 \| good	0.92 \| good	4.87 \| good	0.2 \| good
2026-03-14T04:00:00.000Z	32 \| good	4.395 \| good	23.763 \| good	35.452 \| good	0.961 \| good	6.432 \| good	0.236 \| good
2026-03-14T05:00:00.000Z	33 \| good	5.6 \| good	17.677 \| good	30.4 \| good	1.042 \| good	9.569 \| good	0.272 \| good
2026-03-14T06:00:00.000Z	31 \| good	4.791 \| good	20.308 \| good	32.986 \| good	0.747 \| good	12.327 \| good	0.323 \| good
2026-03-14T07:00:00.000Z	28 \| good	5.054 \| good	23.021 \| good	30.067 \| good	0.747 \| good	12.526 \| good	0.317 \| good
2026-03-14T08:00:00.000Z	26 \| good	3.867 \| good	22.22 \| good	27.607 \| good	0.747 \| good	12.965 \| good	0.33 \| good
2026-03-14T09:00:00.000Z	27 \| good	3.873 \| good	25.252 \| good	29.433 \| good	1.141 \| good	6.979 \| good	0.243 \| good
2026-03-14T10:00:00.000Z	28 \| good	3.883 \| good	17.978 \| good	30.39 \| good	1.194 \| good	6.252 \| good	0.188 \| good
2026-03-14T11:00:00.000Z	26 \| good	4.224 \| good	15.998 \| good	27.901 \| good	1.058 \| good	5.561 \| good	0.148 \| good
2026-03-14T12:00:00.000Z	28 \| good	4.091 \| good	19.632 \| good	29.92 \| good	1.061 \| good	7.896 \| good	0.161 \| good
2026-03-14T13:00:00.000Z	26 \| good	4.387 \| good	17.709 \| good	27.868 \| good	1.067 \| good	7.754 \| good	0.149 \| good
2026-03-14T14:00:00.000Z	27 \| good	3.911 \| good	20.155 \| good	29.497 \| good	1.138 \| good	5.821 \| good	0.206 \| good
2026-03-14T15:00:00.000Z	29 \| good	4.598 \| good	22.426 \| good	31.461 \| good	1.332 \| good	4.773 \| good	0.204 \| good
2026-03-14T16:00:00.000Z	30 \| good	3.525 \| good	13.534 \| good	31.895 \| good	1.504 \| good	4.729 \| good	0.205 \| good
2026-03-14T17:00:00.000Z	30 \| good	3.468 \| good	13.87 \| good	31.689 \| good	1.208 \| good	4.786 \| good	0.257 \| good
2026-03-14T18:00:00.000Z	31 \| good	3.571 \| good	12.899 \| good	33.75 \| good	1.614 \| good	4.684 \| good	0.211 \| good
2026-03-14T19:00:00.000Z	36 \| good	3.81 \| good	18.234 \| good	38.697 \| good	2.22 \| good	4.617 \| good	0.211 \| good
2026-03-14T20:00:00.000Z	39 \| good	3.967 \| good	25.385 \| good	42.283 \| good	2.477 \| good	5.606 \| good	0.257 \| good
2026-03-14T21:00:00.000Z	42 \| good	4.439 \| good	18.695 \| good	44.792 \| good	1.932 \| good	5.985 \| good	0.262 \| good
2026-03-14T22:00:00.000Z	42 \| good	6.439 \| good	21.216 \| good	45.163 \| good	1.884 \| good	5.459 \| good	0.292 \| good
2026-03-14T23:00:00.000Z	44 \| good	6.921 \| good	26.586 \| good	47.14 \| good	1.955 \| good	5.341 \| good	0.338 \| good
2026-03-15T00:00:00.000Z	42 \| good	7.326 \| good	21.715 \| good	44.786 \| good	1.988 \| good	7.415 \| good	0.344 \| good
2026-03-15T01:00:00.000Z	44 \| good	5.832 \| good	29.328 \| good	48.262 \| good	1.858 \| good	10.049 \| good	0.436 \| good
2026-03-15T02:00:00.000Z	41 \| good	4.537 \| good	30.771 \| good	44.473 \| good	1.496 \| good	10.595 \| good	0.386 \| good
2026-03-15T03:00:00.000Z	44 \| good	7.619 \| good	25.095 \| good	46.179 \| good	1.598 \| good	9.292 \| good	0.428 \| good
2026-03-15T04:00:00.000Z	42 \| good	6.415 \| good	25.716 \| good	45.399 \| good	1.349 \| good	9.722 \| good	0.397 \| good
2026-03-15T05:00:00.000Z	39 \| good	6.292 \| good	35.601 \| good	42.01 \| good	1.319 \| good	8.737 \| good	0.322 \| good
2026-03-15T06:00:00.000Z	42 \| good	6.437 \| good	26.912 \| good	45.015 \| good	1.132 \| good	6.482 \| good	0.282 \| good
2026-03-15T07:00:00.000Z	49 \| good	6.273 \| good	53.068 \| good	42.77 \| good	1.142 \| good	6.504 \| good	0.288 \| good
2026-03-15T08:00:00.000Z	39 \| good	5.515 \| good	16.932 \| good	41.912 \| good	1.152 \| good	6.521 \| good	0.288 \| good
2026-03-15T09:00:00.000Z	40 \| good	4.619 \| good	25.362 \| good	43.204 \| good	0.994 \| good	5.736 \| good	0.242 \| good
2026-03-15T10:00:00.000Z	39 \| good	4.677 \| good	22.239 \| good	41.558 \| good	1.022 \| good	4.463 \| good	0.205 \| good
2026-03-15T11:00:00.000Z	38 \| good	5.343 \| good	22.369 \| good	40.855 \| good	1.046 \| good	3.637 \| good	0.205 \| good
2026-03-15T12:00:00.000Z	38 \| good	4.664 \| good	20.784 \| good	40.863 \| good	0.971 \| good	3.464 \| good	0.2 \| good
2026-03-15T13:00:00.000Z	36 \| good	5.42 \| good	23.241 \| good	38.945 \| good	0.964 \| good	3.181 \| good	0.2 \| good
2026-03-15T14:00:00.000Z	38 \| good	4.914 \| good	21.762 \| good	41.228 \| good	1.076 \| good	3.128 \| good	0.2 \| good
2026-03-15T14:00:00.000Z	38 \| good	4.914 \| good	21.762 \| good	41.228 \| good	1.076 \| good	3.128 \| good	0.2 \| good
2026-03-15T15:00:00.000Z	36 \| good	5.683 \| good	24.646 \| good	39.182 \| good	0.468 \| good	1.713 \| good	0.125 \| good
2026-03-15T16:00:00.000Z	37 \| good	5.191 \| good	22.309 \| good	39.616 \| good	0.432 \| good	1.532 \| good	0.123 \| good
2026-03-15T17:00:00.000Z	35 \| good	6.201 \| good	27.347 \| good	38.477 \| good	0.397 \| good	1.351 \| good	0.122 \| good
2026-03-15T18:00:00.000Z	38 \| good	7.254 \| good	31.907 \| good	38.53 \| good	0.362 \| good	1.171 \| good	0.121 \| good
2026-03-15T19:00:00.000Z	38 \| good	7.14 \| good	31.705 \| good	36.743 \| good	0.329 \| good	1.337 \| good	0.127 \| good
2026-03-15T20:00:00.000Z	44 \| good	8.086 \| good	35.347 \| good	34.137 \| good	0.295 \| good	1.503 \| good	0.133 \| good
2026-03-15T21:00:00.000Z	44 \| good	7.508 \| good	32.974 \| good	32.845 \| good	0.262 \| good	1.669 \| good	0.139 \| good
2026-03-15T22:00:00.000Z	28 \| good	3.147 \| good	13.805 \| good	30.077 \| good	0.268 \| good	1.948 \| good	0.151 \| good
2026-03-15T23:00:00.000Z	30 \| good	2.325 \| good	9.705 \| good	31.97 \| good	0.274 \| good	2.226 \| good	0.163 \| good
2026-03-16T00:00:00.000Z	30 \| good	3.118 \| good	12.961 \| good	31.728 \| good	0.28 \| good	2.504 \| good	0.174 \| good
2026-03-16T01:00:00.000Z	28 \| good	4.241 \| good	18.441 \| good	30.271 \| good	0.236 \| good	2.141 \| good	0.167 \| good
2026-03-16T02:00:00.000Z	17 \| good	3.208 \| good	13.815 \| good	18.437 \| good	0.192 \| good	1.777 \| good	0.159 \| good
2026-03-16T03:00:00.000Z	16 \| good	2.331 \| good	9.759 \| good	17.168 \| good	0.147 \| good	1.413 \| good	0.151 \| good
2026-03-16T04:00:00.000Z	22 \| good	4.081 \| good	17.961 \| good	17.632 \| good	0.149 \| good	1.3 \| good	0.158 \| good
2026-03-16T05:00:00.000Z	17 \| good	3.07 \| good	12.559 \| good	18.306 \| good	0.151 \| good	1.186 \| good	0.164 \| good
2026-03-16T06:00:00.000Z	20 \| good	2.472 \| good	10 \| good	21.936 \| good	0.152 \| good	1.073 \| good	0.171 \| good
2026-03-16T07:00:00.000Z	20 \| good	2.196 \| good	9 \| good	22.186 \| good	0.147 \| good	0.983 \| good	0.173 \| good
2026-03-16T08:00:00.000Z	20 \| good	2.559 \| good	10.036 \| good	22.408 \| good	0.141 \| good	0.894 \| good	0.174 \| good
2026-03-16T09:00:00.000Z	22 \| good	1.675 \| good	7 \| good	23.824 \| good	0.136 \| good	0.804 \| good	0.176 \| good
2026-03-16T10:00:00.000Z	21 \| good	1.944 \| good	8 \| good	23.211 \| good	0.148 \| good	0.762 \| good	0.175 \| good
2026-03-16T11:00:00.000Z	21 \| good	1.373 \| good	5.036 \| good	22.74 \| good	0.16 \| good	0.72 \| good	0.174 \| good
2026-03-16T12:00:00.000Z	22 \| good	0.835 \| good	3 \| good	23.62 \| good	0.172 \| good	0.678 \| good	0.173 \| good
2026-03-16T13:00:00.000Z	21 \| good	0.878 \| good	3.036 \| good	22.841 \| good	0.184 \| good	0.705 \| good	0.175 \| good
2026-03-16T14:00:00.000Z	21 \| good	1.737 \| good	7.036 \| good	23.297 \| good	0.196 \| good	0.732 \| good	0.178 \| good
2026-03-16T15:00:00.000Z	20 \| good	1.844 \| good	7.822 \| good	22.427 \| good	0.208 \| good	0.759 \| good	0.18 \| good
2026-03-16T16:00:00.000Z	21 \| good	1.389 \| good	5.244 \| good	23.068 \| good	0.205 \| good	0.68 \| good	0.179 \| good
2026-03-16T17:00:00.000Z	21 \| good	2.405 \| good	9.961 \| good	22.847 \| good	0.201 \| good	0.601 \| good	0.178 \| good
2026-03-16T18:00:00.000Z	26 \| good	0.958 \| good	3.961 \| good	27.503 \| good	0.198 \| good	0.522 \| good	0.177 \| good
2026-03-16T19:00:00.000Z	25 \| good	0.963 \| good	3.961 \| good	27.153 \| good	0.2 \| good	0.51 \| good	0.175 \| good
2026-03-16T20:00:00.000Z	25 \| good	0.625 \| good	2 \| good	27.013 \| good	0.203 \| good	0.497 \| good	0.173 \| good
2026-03-16T21:00:00.000Z	24 \| good	0.954 \| good	3.907 \| good	26.161 \| good	0.205 \| good	0.485 \| good	0.171 \| good
2026-03-16T22:00:00.000Z	22 \| good	0.92 \| good	3.798 \| good	23.504 \| good	0.212 \| good	0.674 \| good	0.171 \| good
2026-03-16T23:00:00.000Z	26 \| good	0.501 \| good	2 \| good	27.598 \| good	0.219 \| good	0.864 \| good	0.172 \| good
2026-03-17T00:00:00.000Z	27 \| good	2.603 \| good	10.733 \| good	28.81 \| good	0.226 \| good	1.053 \| good	0.172 \| good
2026-03-17T01:00:00.000Z	23 \| good	1.951 \| good	8 \| good	25.059 \| good	0.234 \| good	1.119 \| good	0.171 \| good
2026-03-17T02:00:00.000Z	19 \| good	1.921 \| good	7.935 \| good	21.344 \| good	0.242 \| good	1.185 \| good	0.171 \| good
2026-03-17T03:00:00.000Z	19 \| good	2.397 \| good	10 \| good	21.443 \| good	0.25 \| good	1.251 \| good	0.17 \| good
2026-03-17T04:00:00.000Z	20 \| good	2.792 \| good	11.685 \| good	22.331 \| good	0.247 \| good	1.175 \| good	0.169 \| good
2026-03-17T05:00:00.000Z	22 \| good	1.456 \| good	5.907 \| good	24.035 \| good	0.243 \| good	1.099 \| good	0.168 \| good
2026-03-17T06:00:00.000Z	41 \| good	2.921 \| good	3.55 \| good	43.585 \| good	0.237 \| good	1.013 \| good	0.166 \| good
2026-03-17T07:00:00.000Z	28 \| good	0.828 \| good	3.215 \| good	29.663 \| good	0.239 \| good	0.943 \| good	0.167 \| good
2026-03-17T08:00:00.000Z	30 \| good	1.46 \| good	5.895 \| good	31.985 \| good	0.239 \| good	0.864 \| good	0.168 \| good
2026-03-17T09:00:00.000Z	30 \| good	1.335 \| good	5.273 \| good	32.181 \| good	0.238 \| good	0.785 \| good	0.168 \| good
2026-03-17T10:00:00.000Z	22 \| good	0.694 \| good	2.421 \| good	23.887 \| good	0.242 \| good	0.809 \| good	0.17 \| good
2026-03-17T11:00:00.000Z	21 \| good	1.306 \| good	5.065 \| good	22.921 \| good	0.245 \| good	0.832 \| good	0.173 \| good
2026-03-17T12:00:00.000Z	39 \| good	2.562 \| good	3.147 \| good	42.447 \| good	0.244 \| good	0.844 \| good	0.175 \| good
2026-03-17T13:00:00.000Z	39 \| good	2.72 \| good	3.298 \| good	42.257 \| good	0.26 \| good	0.938 \| good	0.178 \| good
2026-03-17T14:00:00.000Z	39 \| good	2.823 \| good	3.392 \| good	42.068 \| good	0.275 \| good	1.033 \| good	0.18 \| good

O'Fallon

Empower business decisions with accurate air quality data

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

0.20ppm

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 2026-03-15.

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 02:00:00 on 2026-03-14.

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

The real-time air quality index in O'fallon, Missouri is 38, 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 4.914 μg/m³.

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

The current PM₁₀ levels in O'fallon, Missouri are 21.762 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 0.2 ppm.

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

The current sulfur dioxide (SO₂) levels in O'fallon, Missouri are 1.076 ppb.

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

The current ozone (O₃) levels at O'fallon, Missouri is 41.228 ppm.

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

The current nitrogen dioxide (NO₂) levels at O'fallon, Missouri is 3.128 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-13T15:00:00.000Z	34 \| good	4.854 \| good	21.332 \| good	37.176 \| good	1.242 \| good	6.303 \| good	0.277 \| good
2026-03-13T16:00:00.000Z	34 \| good	4.088 \| good	24.057 \| good	36.93 \| good	0.937 \| good	5.635 \| good	0.27 \| good
2026-03-13T17:00:00.000Z	36 \| good	4.557 \| good	28.357 \| good	39.052 \| good	0.944 \| good	5.715 \| good	0.27 \| good
2026-03-13T18:00:00.000Z	37 \| good	4.102 \| good	18.597 \| good	40.207 \| good	1.133 \| good	2.5 \| good	0.188 \| good
2026-03-13T19:00:00.000Z	37 \| good	2.942 \| good	14.336 \| good	39.788 \| good	1.195 \| good	3.403 \| good	0.188 \| good
2026-03-13T20:00:00.000Z	39 \| good	1.58 \| good	11.914 \| good	41.554 \| good	1.247 \| good	3.461 \| good	0.195 \| good
2026-03-13T21:00:00.000Z	38 \| good	4.158 \| good	25.489 \| good	41.15 \| good	1.231 \| good	2.181 \| good	0.147 \| good
2026-03-13T22:00:00.000Z	40 \| good	3.069 \| good	18.068 \| good	42.625 \| good	1.238 \| good	2.482 \| good	0.149 \| good
2026-03-13T23:00:00.000Z	42 \| good	2.565 \| good	14.233 \| good	44.745 \| good	1.283 \| good	2.552 \| good	0.142 \| good
2026-03-14T00:00:00.000Z	40 \| good	3.803 \| good	17.641 \| good	43.22 \| good	1.369 \| good	2.32 \| good	0.142 \| good
2026-03-14T01:00:00.000Z	39 \| good	3.241 \| good	15.53 \| good	41.905 \| good	1.288 \| good	3.567 \| good	0.193 \| good
2026-03-14T02:00:00.000Z	37 \| good	3.574 \| good	14.053 \| good	39.736 \| good	0.856 \| good	4.744 \| good	0.236 \| good
2026-03-14T03:00:00.000Z	33 \| good	2.864 \| good	19.437 \| good	36.22 \| good	0.92 \| good	4.87 \| good	0.2 \| good
2026-03-14T04:00:00.000Z	32 \| good	4.395 \| good	23.763 \| good	35.452 \| good	0.961 \| good	6.432 \| good	0.236 \| good
2026-03-14T05:00:00.000Z	33 \| good	5.6 \| good	17.677 \| good	30.4 \| good	1.042 \| good	9.569 \| good	0.272 \| good
2026-03-14T06:00:00.000Z	31 \| good	4.791 \| good	20.308 \| good	32.986 \| good	0.747 \| good	12.327 \| good	0.323 \| good
2026-03-14T07:00:00.000Z	28 \| good	5.054 \| good	23.021 \| good	30.067 \| good	0.747 \| good	12.526 \| good	0.317 \| good
2026-03-14T08:00:00.000Z	26 \| good	3.867 \| good	22.22 \| good	27.607 \| good	0.747 \| good	12.965 \| good	0.33 \| good
2026-03-14T09:00:00.000Z	27 \| good	3.873 \| good	25.252 \| good	29.433 \| good	1.141 \| good	6.979 \| good	0.243 \| good
2026-03-14T10:00:00.000Z	28 \| good	3.883 \| good	17.978 \| good	30.39 \| good	1.194 \| good	6.252 \| good	0.188 \| good
2026-03-14T11:00:00.000Z	26 \| good	4.224 \| good	15.998 \| good	27.901 \| good	1.058 \| good	5.561 \| good	0.148 \| good
2026-03-14T12:00:00.000Z	28 \| good	4.091 \| good	19.632 \| good	29.92 \| good	1.061 \| good	7.896 \| good	0.161 \| good
2026-03-14T13:00:00.000Z	26 \| good	4.387 \| good	17.709 \| good	27.868 \| good	1.067 \| good	7.754 \| good	0.149 \| good
2026-03-14T14:00:00.000Z	27 \| good	3.911 \| good	20.155 \| good	29.497 \| good	1.138 \| good	5.821 \| good	0.206 \| good
2026-03-14T15:00:00.000Z	29 \| good	4.598 \| good	22.426 \| good	31.461 \| good	1.332 \| good	4.773 \| good	0.204 \| good
2026-03-14T16:00:00.000Z	30 \| good	3.525 \| good	13.534 \| good	31.895 \| good	1.504 \| good	4.729 \| good	0.205 \| good
2026-03-14T17:00:00.000Z	30 \| good	3.468 \| good	13.87 \| good	31.689 \| good	1.208 \| good	4.786 \| good	0.257 \| good
2026-03-14T18:00:00.000Z	31 \| good	3.571 \| good	12.899 \| good	33.75 \| good	1.614 \| good	4.684 \| good	0.211 \| good
2026-03-14T19:00:00.000Z	36 \| good	3.81 \| good	18.234 \| good	38.697 \| good	2.22 \| good	4.617 \| good	0.211 \| good
2026-03-14T20:00:00.000Z	39 \| good	3.967 \| good	25.385 \| good	42.283 \| good	2.477 \| good	5.606 \| good	0.257 \| good
2026-03-14T21:00:00.000Z	42 \| good	4.439 \| good	18.695 \| good	44.792 \| good	1.932 \| good	5.985 \| good	0.262 \| good
2026-03-14T22:00:00.000Z	42 \| good	6.439 \| good	21.216 \| good	45.163 \| good	1.884 \| good	5.459 \| good	0.292 \| good
2026-03-14T23:00:00.000Z	44 \| good	6.921 \| good	26.586 \| good	47.14 \| good	1.955 \| good	5.341 \| good	0.338 \| good
2026-03-15T00:00:00.000Z	42 \| good	7.326 \| good	21.715 \| good	44.786 \| good	1.988 \| good	7.415 \| good	0.344 \| good
2026-03-15T01:00:00.000Z	44 \| good	5.832 \| good	29.328 \| good	48.262 \| good	1.858 \| good	10.049 \| good	0.436 \| good
2026-03-15T02:00:00.000Z	41 \| good	4.537 \| good	30.771 \| good	44.473 \| good	1.496 \| good	10.595 \| good	0.386 \| good
2026-03-15T03:00:00.000Z	44 \| good	7.619 \| good	25.095 \| good	46.179 \| good	1.598 \| good	9.292 \| good	0.428 \| good
2026-03-15T04:00:00.000Z	42 \| good	6.415 \| good	25.716 \| good	45.399 \| good	1.349 \| good	9.722 \| good	0.397 \| good
2026-03-15T05:00:00.000Z	39 \| good	6.292 \| good	35.601 \| good	42.01 \| good	1.319 \| good	8.737 \| good	0.322 \| good
2026-03-15T06:00:00.000Z	42 \| good	6.437 \| good	26.912 \| good	45.015 \| good	1.132 \| good	6.482 \| good	0.282 \| good
2026-03-15T07:00:00.000Z	49 \| good	6.273 \| good	53.068 \| good	42.77 \| good	1.142 \| good	6.504 \| good	0.288 \| good
2026-03-15T08:00:00.000Z	39 \| good	5.515 \| good	16.932 \| good	41.912 \| good	1.152 \| good	6.521 \| good	0.288 \| good
2026-03-15T09:00:00.000Z	40 \| good	4.619 \| good	25.362 \| good	43.204 \| good	0.994 \| good	5.736 \| good	0.242 \| good
2026-03-15T10:00:00.000Z	39 \| good	4.677 \| good	22.239 \| good	41.558 \| good	1.022 \| good	4.463 \| good	0.205 \| good
2026-03-15T11:00:00.000Z	38 \| good	5.343 \| good	22.369 \| good	40.855 \| good	1.046 \| good	3.637 \| good	0.205 \| good
2026-03-15T12:00:00.000Z	38 \| good	4.664 \| good	20.784 \| good	40.863 \| good	0.971 \| good	3.464 \| good	0.2 \| good
2026-03-15T13:00:00.000Z	36 \| good	5.42 \| good	23.241 \| good	38.945 \| good	0.964 \| good	3.181 \| good	0.2 \| good
2026-03-15T14:00:00.000Z	38 \| good	4.914 \| good	21.762 \| good	41.228 \| good	1.076 \| good	3.128 \| good	0.2 \| good
2026-03-15T14:00:00.000Z	38 \| good	4.914 \| good	21.762 \| good	41.228 \| good	1.076 \| good	3.128 \| good	0.2 \| good
2026-03-15T15:00:00.000Z	36 \| good	5.683 \| good	24.646 \| good	39.182 \| good	0.468 \| good	1.713 \| good	0.125 \| good
2026-03-15T16:00:00.000Z	37 \| good	5.191 \| good	22.309 \| good	39.616 \| good	0.432 \| good	1.532 \| good	0.123 \| good
2026-03-15T17:00:00.000Z	35 \| good	6.201 \| good	27.347 \| good	38.477 \| good	0.397 \| good	1.351 \| good	0.122 \| good
2026-03-15T18:00:00.000Z	38 \| good	7.254 \| good	31.907 \| good	38.53 \| good	0.362 \| good	1.171 \| good	0.121 \| good
2026-03-15T19:00:00.000Z	38 \| good	7.14 \| good	31.705 \| good	36.743 \| good	0.329 \| good	1.337 \| good	0.127 \| good
2026-03-15T20:00:00.000Z	44 \| good	8.086 \| good	35.347 \| good	34.137 \| good	0.295 \| good	1.503 \| good	0.133 \| good
2026-03-15T21:00:00.000Z	44 \| good	7.508 \| good	32.974 \| good	32.845 \| good	0.262 \| good	1.669 \| good	0.139 \| good
2026-03-15T22:00:00.000Z	28 \| good	3.147 \| good	13.805 \| good	30.077 \| good	0.268 \| good	1.948 \| good	0.151 \| good
2026-03-15T23:00:00.000Z	30 \| good	2.325 \| good	9.705 \| good	31.97 \| good	0.274 \| good	2.226 \| good	0.163 \| good
2026-03-16T00:00:00.000Z	30 \| good	3.118 \| good	12.961 \| good	31.728 \| good	0.28 \| good	2.504 \| good	0.174 \| good
2026-03-16T01:00:00.000Z	28 \| good	4.241 \| good	18.441 \| good	30.271 \| good	0.236 \| good	2.141 \| good	0.167 \| good
2026-03-16T02:00:00.000Z	17 \| good	3.208 \| good	13.815 \| good	18.437 \| good	0.192 \| good	1.777 \| good	0.159 \| good
2026-03-16T03:00:00.000Z	16 \| good	2.331 \| good	9.759 \| good	17.168 \| good	0.147 \| good	1.413 \| good	0.151 \| good
2026-03-16T04:00:00.000Z	22 \| good	4.081 \| good	17.961 \| good	17.632 \| good	0.149 \| good	1.3 \| good	0.158 \| good
2026-03-16T05:00:00.000Z	17 \| good	3.07 \| good	12.559 \| good	18.306 \| good	0.151 \| good	1.186 \| good	0.164 \| good
2026-03-16T06:00:00.000Z	20 \| good	2.472 \| good	10 \| good	21.936 \| good	0.152 \| good	1.073 \| good	0.171 \| good
2026-03-16T07:00:00.000Z	20 \| good	2.196 \| good	9 \| good	22.186 \| good	0.147 \| good	0.983 \| good	0.173 \| good
2026-03-16T08:00:00.000Z	20 \| good	2.559 \| good	10.036 \| good	22.408 \| good	0.141 \| good	0.894 \| good	0.174 \| good
2026-03-16T09:00:00.000Z	22 \| good	1.675 \| good	7 \| good	23.824 \| good	0.136 \| good	0.804 \| good	0.176 \| good
2026-03-16T10:00:00.000Z	21 \| good	1.944 \| good	8 \| good	23.211 \| good	0.148 \| good	0.762 \| good	0.175 \| good
2026-03-16T11:00:00.000Z	21 \| good	1.373 \| good	5.036 \| good	22.74 \| good	0.16 \| good	0.72 \| good	0.174 \| good
2026-03-16T12:00:00.000Z	22 \| good	0.835 \| good	3 \| good	23.62 \| good	0.172 \| good	0.678 \| good	0.173 \| good
2026-03-16T13:00:00.000Z	21 \| good	0.878 \| good	3.036 \| good	22.841 \| good	0.184 \| good	0.705 \| good	0.175 \| good
2026-03-16T14:00:00.000Z	21 \| good	1.737 \| good	7.036 \| good	23.297 \| good	0.196 \| good	0.732 \| good	0.178 \| good
2026-03-16T15:00:00.000Z	20 \| good	1.844 \| good	7.822 \| good	22.427 \| good	0.208 \| good	0.759 \| good	0.18 \| good
2026-03-16T16:00:00.000Z	21 \| good	1.389 \| good	5.244 \| good	23.068 \| good	0.205 \| good	0.68 \| good	0.179 \| good
2026-03-16T17:00:00.000Z	21 \| good	2.405 \| good	9.961 \| good	22.847 \| good	0.201 \| good	0.601 \| good	0.178 \| good
2026-03-16T18:00:00.000Z	26 \| good	0.958 \| good	3.961 \| good	27.503 \| good	0.198 \| good	0.522 \| good	0.177 \| good
2026-03-16T19:00:00.000Z	25 \| good	0.963 \| good	3.961 \| good	27.153 \| good	0.2 \| good	0.51 \| good	0.175 \| good
2026-03-16T20:00:00.000Z	25 \| good	0.625 \| good	2 \| good	27.013 \| good	0.203 \| good	0.497 \| good	0.173 \| good
2026-03-16T21:00:00.000Z	24 \| good	0.954 \| good	3.907 \| good	26.161 \| good	0.205 \| good	0.485 \| good	0.171 \| good
2026-03-16T22:00:00.000Z	22 \| good	0.92 \| good	3.798 \| good	23.504 \| good	0.212 \| good	0.674 \| good	0.171 \| good
2026-03-16T23:00:00.000Z	26 \| good	0.501 \| good	2 \| good	27.598 \| good	0.219 \| good	0.864 \| good	0.172 \| good
2026-03-17T00:00:00.000Z	27 \| good	2.603 \| good	10.733 \| good	28.81 \| good	0.226 \| good	1.053 \| good	0.172 \| good
2026-03-17T01:00:00.000Z	23 \| good	1.951 \| good	8 \| good	25.059 \| good	0.234 \| good	1.119 \| good	0.171 \| good
2026-03-17T02:00:00.000Z	19 \| good	1.921 \| good	7.935 \| good	21.344 \| good	0.242 \| good	1.185 \| good	0.171 \| good
2026-03-17T03:00:00.000Z	19 \| good	2.397 \| good	10 \| good	21.443 \| good	0.25 \| good	1.251 \| good	0.17 \| good
2026-03-17T04:00:00.000Z	20 \| good	2.792 \| good	11.685 \| good	22.331 \| good	0.247 \| good	1.175 \| good	0.169 \| good
2026-03-17T05:00:00.000Z	22 \| good	1.456 \| good	5.907 \| good	24.035 \| good	0.243 \| good	1.099 \| good	0.168 \| good
2026-03-17T06:00:00.000Z	41 \| good	2.921 \| good	3.55 \| good	43.585 \| good	0.237 \| good	1.013 \| good	0.166 \| good
2026-03-17T07:00:00.000Z	28 \| good	0.828 \| good	3.215 \| good	29.663 \| good	0.239 \| good	0.943 \| good	0.167 \| good
2026-03-17T08:00:00.000Z	30 \| good	1.46 \| good	5.895 \| good	31.985 \| good	0.239 \| good	0.864 \| good	0.168 \| good
2026-03-17T09:00:00.000Z	30 \| good	1.335 \| good	5.273 \| good	32.181 \| good	0.238 \| good	0.785 \| good	0.168 \| good
2026-03-17T10:00:00.000Z	22 \| good	0.694 \| good	2.421 \| good	23.887 \| good	0.242 \| good	0.809 \| good	0.17 \| good
2026-03-17T11:00:00.000Z	21 \| good	1.306 \| good	5.065 \| good	22.921 \| good	0.245 \| good	0.832 \| good	0.173 \| good
2026-03-17T12:00:00.000Z	39 \| good	2.562 \| good	3.147 \| good	42.447 \| good	0.244 \| good	0.844 \| good	0.175 \| good
2026-03-17T13:00:00.000Z	39 \| good	2.72 \| good	3.298 \| good	42.257 \| good	0.26 \| good	0.938 \| good	0.178 \| good
2026-03-17T14:00:00.000Z	39 \| good	2.823 \| good	3.392 \| good	42.068 \| good	0.275 \| good	1.033 \| good	0.18 \| 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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St. Peters, Missouri

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Wentzville, Missouri

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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?