What is the current concentration of PM10 in O'fallon, Illinois?

The current PM10 concentration at O'fallon, Illinois is 68.595 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in O'fallon, Illinois?

The current sulfur dioxide (SO2) concentration at O'fallon, Illinois is 0.98 ppb.

What is the current concentration of ozone (O3) in O'fallon, Illinois?

The current ozone (O3) concentration at O'fallon, Illinois is 16.206 ppm.

What is the current concentration of nitrogen dioxide (NO2) in O'fallon, Illinois?

The current nitrogen dioxide (NO2) concentration at O'fallon, Illinois is 10.061 ppb.

O'Fallon, Illinois live air quality index now

Q: What is the current concentration of PM2.5 in O'fallon, Illinois?

The current PM2.5 concentration at O'fallon, Illinois is 16.768 μg/m3.

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

Last updated: ... (Local time)

Major air pollutants in O'Fallon, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

16.77 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

68.59 μg/m³

155

255

425

605+

Ozone (O₃)

16.21 ppb

201

201+

Sulfur Dioxide (SO₂)

0.98 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.06 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.28 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

O'Fallon, Illinois

Get Live Pollen Counts

O'Fallon, Illinois

Scroll To Air Quality Map

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

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T08:00:00.000Z	52 \| moderate	9.782 \| good	42.41 \| good	18.135 \| good	1.079 \| good	19.378 \| good	0.251 \| good
2025-12-05T09:00:00.000Z	52 \| moderate	9.641 \| good	36.73 \| good	8.672 \| good	0.907 \| good	24.682 \| good	0.285 \| good
2025-12-05T10:00:00.000Z	54 \| moderate	10.521 \| good	49.781 \| good	8.778 \| good	0.75 \| good	29.059 \| good	0.285 \| good
2025-12-05T11:00:00.000Z	62 \| moderate	15.418 \| fine	66.56 \| fine	7.591 \| good	1.108 \| good	25.261 \| good	0.335 \| good
2025-12-05T12:00:00.000Z	54 \| moderate	10.791 \| good	49.562 \| good	6.044 \| good	0.915 \| good	32.589 \| good	0.372 \| good
2025-12-05T13:00:00.000Z	58 \| moderate	13.442 \| fine	58.718 \| fine	6.251 \| good	0.707 \| good	29.633 \| good	0.406 \| good
2025-12-05T14:00:00.000Z	66 \| moderate	16.626 \| fine	60.722 \| fine	6.342 \| good	1.356 \| good	25.049 \| good	0.461 \| good
2025-12-05T15:00:00.000Z	67 \| moderate	17.651 \| fine	56.594 \| fine	8.844 \| good	2.06 \| good	19.503 \| good	0.362 \| good
2025-12-05T16:00:00.000Z	75 \| moderate	21.535 \| fine	70.012 \| fine	14.33 \| good	0.746 \| good	16.51 \| good	0.325 \| good
2025-12-05T17:00:00.000Z	72 \| moderate	20.257 \| fine	97.111 \| fine	16.366 \| good	0.936 \| good	14.887 \| good	0.355 \| good
2025-12-05T18:00:00.000Z	73 \| moderate	20.751 \| fine	71.579 \| fine	19.491 \| good	1.855 \| good	12.991 \| good	0.317 \| good
2025-12-05T19:00:00.000Z	66 \| moderate	17.291 \| fine	57.076 \| fine	18.919 \| good	0.926 \| good	11.598 \| good	0.263 \| good
2025-12-05T20:00:00.000Z	58 \| moderate	13.422 \| fine	58.413 \| fine	23.76 \| good	1.302 \| good	10.628 \| good	0.266 \| good
2025-12-05T21:00:00.000Z	56 \| moderate	11.713 \| good	57.313 \| fine	23.824 \| good	1.446 \| good	10.289 \| good	0.263 \| good
2025-12-05T22:00:00.000Z	52 \| moderate	9.676 \| good	49.267 \| good	25.746 \| good	0.793 \| good	10.842 \| good	0.266 \| good
2025-12-05T23:00:00.000Z	52 \| moderate	9.906 \| good	48.378 \| good	24.807 \| good	0.632 \| good	13.965 \| good	0.351 \| good
2025-12-06T00:00:00.000Z	49 \| good	8.643 \| good	37.428 \| good	20.753 \| good	0.831 \| good	16.263 \| good	0.409 \| good
2025-12-06T01:00:00.000Z	49 \| good	8.674 \| good	47.089 \| good	19.332 \| good	0.714 \| good	18.421 \| good	0.355 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	10.767 \| good	51.736 \| good	17.951 \| good	1.307 \| good	18.858 \| good	0.355 \| good
2025-12-06T03:00:00.000Z	52 \| moderate	10.285 \| good	38.709 \| good	16.944 \| good	1.3 \| good	15.009 \| good	0.288 \| good
2025-12-06T04:00:00.000Z	49 \| good	9.275 \| good	19.82 \| good	21.66 \| good	1.702 \| good	15.76 \| good	0.288 \| good
2025-12-06T05:00:00.000Z	52 \| moderate	9.627 \| good	48.278 \| good	13.891 \| good	1.784 \| good	15.099 \| good	0.342 \| good
2025-12-06T06:00:00.000Z	52 \| moderate	9.53 \| good	41.745 \| good	13.529 \| good	0.576 \| good	12.252 \| good	0.254 \| good
2025-12-06T07:00:00.000Z	54 \| moderate	10.915 \| good	52.761 \| good	15.536 \| good	0.57 \| good	12.415 \| good	0.247 \| good
2025-12-06T08:00:00.000Z	56 \| moderate	11.945 \| good	57 \| fine	13.586 \| good	0.57 \| good	12.766 \| good	0.247 \| good
2025-12-06T09:00:00.000Z	56 \| moderate	11.974 \| good	42.108 \| good	17.381 \| good	0.702 \| good	8.333 \| good	0.247 \| good
2025-12-06T10:00:00.000Z	56 \| moderate	12.218 \| fine	39.325 \| good	16.665 \| good	0.643 \| good	8.968 \| good	0.247 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	12.641 \| fine	47.393 \| good	12.194 \| good	0.59 \| good	9.556 \| good	0.301 \| good
2025-12-06T12:00:00.000Z	62 \| moderate	15.25 \| fine	56.299 \| fine	11.402 \| good	0.518 \| good	10.936 \| good	0.247 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	17.321 \| fine	31.817 \| good	11.165 \| good	0.466 \| good	10.987 \| good	0.28 \| good
2025-12-06T14:00:00.000Z	86 \| moderate	27.912 \| fine	100.275 \| fine	6.898 \| good	0.525 \| good	10.561 \| good	0.318 \| good
2025-12-06T15:00:00.000Z	81 \| moderate	25.309 \| fine	55.698 \| fine	7.539 \| good	0.592 \| good	8.172 \| good	0.28 \| good
2025-12-06T16:00:00.000Z	69 \| moderate	18.847 \| fine	51.546 \| good	10.293 \| good	0.626 \| good	7.048 \| good	0.284 \| good
2025-12-06T17:00:00.000Z	66 \| moderate	17.292 \| fine	31.187 \| good	14.275 \| good	1.382 \| good	6.392 \| good	0.284 \| good
2025-12-06T18:00:00.000Z	60 \| moderate	13.61 \| fine	31.994 \| good	17.629 \| good	1.773 \| good	6.26 \| good	0.284 \| good
2025-12-06T19:00:00.000Z	58 \| moderate	12.961 \| fine	63.672 \| fine	19.124 \| good	3.642 \| good	5.545 \| good	0.288 \| good
2025-12-06T20:00:00.000Z	49 \| good	8.638 \| good	43.561 \| good	21.353 \| good	2.223 \| good	6.911 \| good	0.259 \| good
2025-12-06T21:00:00.000Z	52 \| moderate	10.053 \| good	50.352 \| good	21.966 \| good	1.59 \| good	7.029 \| good	0.226 \| good
2025-12-06T22:00:00.000Z	56 \| moderate	8.43 \| good	64.735 \| fine	21.856 \| good	1.21 \| good	8.683 \| good	0.317 \| good
2025-12-06T23:00:00.000Z	44 \| good	8.387 \| good	41.704 \| good	23.772 \| good	0.795 \| good	12.242 \| good	0.321 \| good
2025-12-07T00:00:00.000Z	52 \| moderate	9.812 \| good	46.819 \| good	19.476 \| good	0.933 \| good	14.949 \| good	0.321 \| good
2025-12-07T01:00:00.000Z	60 \| moderate	14.286 \| fine	56.613 \| fine	18.266 \| good	1.103 \| good	11.071 \| good	0.284 \| good
2025-12-07T02:00:00.000Z	60 \| moderate	13.91 \| fine	56.571 \| fine	18.469 \| good	1.143 \| good	9.252 \| good	0.291 \| good
2025-12-07T03:00:00.000Z	60 \| moderate	13.779 \| fine	59.48 \| fine	19.987 \| good	0.86 \| good	9.384 \| good	0.233 \| good
2025-12-07T04:00:00.000Z	58 \| moderate	13.216 \| fine	60.996 \| fine	19.109 \| good	0.858 \| good	9.622 \| good	0.233 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	14.639 \| fine	61.958 \| fine	18.789 \| good	1.01 \| good	10.504 \| good	0.291 \| good
2025-12-07T06:00:00.000Z	64 \| moderate	16.336 \| fine	57.791 \| fine	16.213 \| good	1.005 \| good	10.721 \| good	0.284 \| good
2025-12-07T07:00:00.000Z	66 \| moderate	16.768 \| fine	68.595 \| fine	16.206 \| good	0.98 \| good	10.061 \| good	0.276 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	15.525 \| fine	69.002 \| fine	12.491 \| good	0.723 \| good	6.334 \| good	0.22 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.418 \| fine	68.508 \| fine	11.708 \| good	0.701 \| good	6.045 \| good	0.218 \| good
2025-12-07T10:00:00.000Z	64 \| moderate	15.566 \| fine	69.207 \| fine	12.513 \| good	0.747 \| good	6.919 \| good	0.225 \| good
2025-12-07T11:00:00.000Z	64 \| moderate	15.578 \| fine	69.123 \| fine	8.18 \| good	0.793 \| good	7.793 \| good	0.231 \| good
2025-12-07T12:00:00.000Z	60 \| moderate	14.449 \| fine	64.564 \| fine	8.392 \| good	0.839 \| good	8.667 \| good	0.237 \| good
2025-12-07T13:00:00.000Z	66 \| moderate	16.564 \| fine	73.774 \| fine	11.64 \| good	0.983 \| good	10.344 \| good	0.276 \| good
2025-12-07T14:00:00.000Z	69 \| moderate	19.416 \| fine	85.484 \| fine	10.056 \| good	1.127 \| good	12.021 \| good	0.314 \| good
2025-12-07T15:00:00.000Z	79 \| moderate	24.336 \| fine	106.521 \| fine	12.128 \| good	1.271 \| good	13.698 \| good	0.353 \| good
2025-12-07T16:00:00.000Z	73 \| moderate	21.299 \| fine	93.761 \| fine	20.829 \| good	1.082 \| good	11.252 \| good	0.314 \| good
2025-12-07T17:00:00.000Z	71 \| moderate	19.904 \| fine	88.106 \| fine	23.039 \| good	0.892 \| good	8.806 \| good	0.276 \| good
2025-12-07T18:00:00.000Z	73 \| moderate	20.759 \| fine	90.941 \| fine	20.133 \| good	0.703 \| good	6.361 \| good	0.237 \| good
2025-12-07T19:00:00.000Z	75 \| moderate	21.688 \| fine	94.943 \| fine	20.781 \| good	0.888 \| good	7.343 \| good	0.239 \| good
2025-12-07T20:00:00.000Z	67 \| moderate	18.223 \| fine	80.587 \| fine	23.062 \| good	1.072 \| good	8.325 \| good	0.242 \| good
2025-12-07T21:00:00.000Z	60 \| moderate	13.846 \| fine	62.602 \| fine	20.671 \| good	1.257 \| good	9.308 \| good	0.244 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	10.643 \| good	47.209 \| good	19.994 \| good	1.178 \| good	9.018 \| good	0.237 \| good
2025-12-07T23:00:00.000Z	49 \| good	9.384 \| good	41.631 \| good	20.119 \| good	1.099 \| good	8.727 \| good	0.23 \| good
2025-12-08T00:00:00.000Z	49 \| good	9.425 \| good	42.309 \| good	19.138 \| good	1.019 \| good	8.437 \| good	0.224 \| good
2025-12-08T01:00:00.000Z	49 \| good	8.793 \| good	38.681 \| good	20.221 \| good	0.925 \| good	7.25 \| good	0.219 \| good
2025-12-08T02:00:00.000Z	49 \| good	8.917 \| good	39.39 \| good	16.568 \| good	0.83 \| good	6.063 \| good	0.213 \| good
2025-12-08T03:00:00.000Z	49 \| good	8.711 \| good	38.054 \| good	16.704 \| good	0.735 \| good	4.876 \| good	0.208 \| good
2025-12-08T04:00:00.000Z	44 \| good	8.4 \| good	36.874 \| good	16.153 \| good	0.717 \| good	4.704 \| good	0.206 \| good
2025-12-08T05:00:00.000Z	49 \| good	9.302 \| good	41.783 \| good	18.201 \| good	0.699 \| good	4.531 \| good	0.205 \| good
2025-12-08T06:00:00.000Z	49 \| good	8.532 \| good	37.36 \| good	18.962 \| good	0.68 \| good	4.358 \| good	0.203 \| good
2025-12-08T07:00:00.000Z	49 \| good	8.861 \| good	39.218 \| good	18.508 \| good	0.648 \| good	4.247 \| good	0.201 \| good
2025-12-08T08:00:00.000Z	44 \| good	8.026 \| good	35.118 \| good	17.622 \| good	0.615 \| good	4.135 \| good	0.198 \| good
2025-12-08T09:00:00.000Z	49 \| good	8.674 \| good	37.978 \| good	16.96 \| good	0.583 \| good	4.024 \| good	0.196 \| good
2025-12-08T10:00:00.000Z	49 \| good	9.191 \| good	40.648 \| good	14.809 \| good	0.574 \| good	4.369 \| good	0.197 \| good
2025-12-08T11:00:00.000Z	38 \| good	7.093 \| good	31.508 \| good	16.072 \| good	0.566 \| good	4.714 \| good	0.199 \| good
2025-12-08T12:00:00.000Z	38 \| good	7.227 \| good	31.68 \| good	17.328 \| good	0.557 \| good	5.06 \| good	0.2 \| good
2025-12-08T13:00:00.000Z	38 \| good	7.232 \| good	32.033 \| good	18.476 \| good	0.624 \| good	5.562 \| good	0.209 \| good
2025-12-08T14:00:00.000Z	38 \| good	6.909 \| good	30.66 \| good	20.7 \| good	0.691 \| good	6.064 \| good	0.217 \| good
2025-12-08T15:00:00.000Z	44 \| good	7.982 \| good	34.815 \| good	19.554 \| good	0.758 \| good	6.566 \| good	0.225 \| good
2025-12-08T16:00:00.000Z	38 \| good	7.333 \| good	32.204 \| good	19.479 \| good	0.994 \| good	5.891 \| good	0.216 \| good
2025-12-08T17:00:00.000Z	49 \| good	8.65 \| good	37.905 \| good	18.893 \| good	1.23 \| good	5.216 \| good	0.207 \| good
2025-12-08T18:00:00.000Z	44 \| good	8.115 \| good	35.626 \| good	21.806 \| good	1.466 \| good	4.542 \| good	0.198 \| good
2025-12-08T19:00:00.000Z	38 \| good	6.783 \| good	29.835 \| good	20.932 \| good	1.692 \| good	5.201 \| good	0.201 \| good
2025-12-08T20:00:00.000Z	38 \| good	7.314 \| good	32.243 \| good	22.106 \| good	1.919 \| good	5.861 \| good	0.203 \| good
2025-12-08T21:00:00.000Z	49 \| good	9.082 \| good	40.328 \| good	21.234 \| good	2.146 \| good	6.52 \| good	0.206 \| good
2025-12-08T22:00:00.000Z	49 \| good	9.024 \| good	40.313 \| good	15.984 \| good	2.136 \| good	12.738 \| good	0.258 \| good
2025-12-08T23:00:00.000Z	49 \| good	8.851 \| good	39.652 \| good	12.15 \| good	2.126 \| good	18.956 \| good	0.309 \| good
2025-12-09T00:00:00.000Z	52 \| moderate	10.263 \| good	45.424 \| good	12.056 \| good	2.116 \| good	25.174 \| good	0.361 \| good
2025-12-09T01:00:00.000Z	44 \| good	8.428 \| good	36.963 \| good	13.047 \| good	2.174 \| good	20.916 \| good	0.328 \| good
2025-12-09T02:00:00.000Z	33 \| good	5.729 \| good	25.558 \| good	13.236 \| good	2.233 \| good	16.658 \| good	0.296 \| good
2025-12-09T03:00:00.000Z	33 \| good	6.249 \| good	27.589 \| good	12.932 \| good	2.291 \| good	12.4 \| good	0.263 \| good
2025-12-09T04:00:00.000Z	33 \| good	6.086 \| good	27.067 \| good	12.944 \| good	2.033 \| good	10.39 \| good	0.246 \| good
2025-12-09T05:00:00.000Z	44 \| good	8.312 \| good	36.525 \| good	16.068 \| good	1.775 \| good	8.38 \| good	0.229 \| good
2025-12-09T06:00:00.000Z	52 \| moderate	10.358 \| good	10.501 \| good	23.246 \| good	1.519 \| good	6.389 \| good	0.212 \| good
2025-12-09T07:00:00.000Z	33 \| good	6.172 \| good	27.465 \| good	24.68 \| good	1.328 \| good	5.296 \| good	0.205 \| good

O'Fallon

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O'Fallon, Illinois air quality map: Track AQI near you

0.28ppm

How accurate is Illinois, USA air quality data?

Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for O'fallon, Illinois updated?

The air quality for O'fallon, Illinois is updated every hour.

When was the worst air quality at O'fallon, Illinois in the last 24 hrs?

The worst air quality in O'fallon, Illinois in the last 24 hours was observed at 02:00:00 on 2025-12-06.

When was the best air quality at O'fallon, Illinois in the last 24 hrs?

In the last 24 hrs, the best air quality in O'fallon, Illinois was observed at 11:00:00 on 2025-12-06.

What is the current air quality in O'fallon, Illinois?

The current air quality in O'fallon, Illinois is 66, categorized as Moderate based on real-time data.

What pollutant is the most common in O'fallon, Illinois?

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

What should I do if the air quality in O'fallon, Illinois is poor?

If the air quality in O'fallon, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in O'fallon, Illinois?

The current PM_2.5 concentration at O'fallon, Illinois is 16.768 μg/m³.

What is the current concentration of PM₁₀ in O'fallon, Illinois?

The current PM₁₀ concentration at O'fallon, Illinois is 68.595 μg/m³.

What is the current concentration of carbon monoxide (CO) in O'fallon, Illinois?

The current carbon monoxide (CO) concentration at O'fallon, Illinois is 0.276 ppm.

What is the current concentration of sulfur dioxide (SO₂) in O'fallon, Illinois?

The current sulfur dioxide (SO₂) concentration at O'fallon, Illinois is 0.98 ppb.

What is the current concentration of ozone (O₃) in O'fallon, Illinois?

The current ozone (O₃) concentration at O'fallon, Illinois is 16.206 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in O'fallon, Illinois?

The current nitrogen dioxide (NO₂) concentration at O'fallon, Illinois is 10.061 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T08:00:00.000Z	52 \| moderate	9.782 \| good	42.41 \| good	18.135 \| good	1.079 \| good	19.378 \| good	0.251 \| good
2025-12-05T09:00:00.000Z	52 \| moderate	9.641 \| good	36.73 \| good	8.672 \| good	0.907 \| good	24.682 \| good	0.285 \| good
2025-12-05T10:00:00.000Z	54 \| moderate	10.521 \| good	49.781 \| good	8.778 \| good	0.75 \| good	29.059 \| good	0.285 \| good
2025-12-05T11:00:00.000Z	62 \| moderate	15.418 \| fine	66.56 \| fine	7.591 \| good	1.108 \| good	25.261 \| good	0.335 \| good
2025-12-05T12:00:00.000Z	54 \| moderate	10.791 \| good	49.562 \| good	6.044 \| good	0.915 \| good	32.589 \| good	0.372 \| good
2025-12-05T13:00:00.000Z	58 \| moderate	13.442 \| fine	58.718 \| fine	6.251 \| good	0.707 \| good	29.633 \| good	0.406 \| good
2025-12-05T14:00:00.000Z	66 \| moderate	16.626 \| fine	60.722 \| fine	6.342 \| good	1.356 \| good	25.049 \| good	0.461 \| good
2025-12-05T15:00:00.000Z	67 \| moderate	17.651 \| fine	56.594 \| fine	8.844 \| good	2.06 \| good	19.503 \| good	0.362 \| good
2025-12-05T16:00:00.000Z	75 \| moderate	21.535 \| fine	70.012 \| fine	14.33 \| good	0.746 \| good	16.51 \| good	0.325 \| good
2025-12-05T17:00:00.000Z	72 \| moderate	20.257 \| fine	97.111 \| fine	16.366 \| good	0.936 \| good	14.887 \| good	0.355 \| good
2025-12-05T18:00:00.000Z	73 \| moderate	20.751 \| fine	71.579 \| fine	19.491 \| good	1.855 \| good	12.991 \| good	0.317 \| good
2025-12-05T19:00:00.000Z	66 \| moderate	17.291 \| fine	57.076 \| fine	18.919 \| good	0.926 \| good	11.598 \| good	0.263 \| good
2025-12-05T20:00:00.000Z	58 \| moderate	13.422 \| fine	58.413 \| fine	23.76 \| good	1.302 \| good	10.628 \| good	0.266 \| good
2025-12-05T21:00:00.000Z	56 \| moderate	11.713 \| good	57.313 \| fine	23.824 \| good	1.446 \| good	10.289 \| good	0.263 \| good
2025-12-05T22:00:00.000Z	52 \| moderate	9.676 \| good	49.267 \| good	25.746 \| good	0.793 \| good	10.842 \| good	0.266 \| good
2025-12-05T23:00:00.000Z	52 \| moderate	9.906 \| good	48.378 \| good	24.807 \| good	0.632 \| good	13.965 \| good	0.351 \| good
2025-12-06T00:00:00.000Z	49 \| good	8.643 \| good	37.428 \| good	20.753 \| good	0.831 \| good	16.263 \| good	0.409 \| good
2025-12-06T01:00:00.000Z	49 \| good	8.674 \| good	47.089 \| good	19.332 \| good	0.714 \| good	18.421 \| good	0.355 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	10.767 \| good	51.736 \| good	17.951 \| good	1.307 \| good	18.858 \| good	0.355 \| good
2025-12-06T03:00:00.000Z	52 \| moderate	10.285 \| good	38.709 \| good	16.944 \| good	1.3 \| good	15.009 \| good	0.288 \| good
2025-12-06T04:00:00.000Z	49 \| good	9.275 \| good	19.82 \| good	21.66 \| good	1.702 \| good	15.76 \| good	0.288 \| good
2025-12-06T05:00:00.000Z	52 \| moderate	9.627 \| good	48.278 \| good	13.891 \| good	1.784 \| good	15.099 \| good	0.342 \| good
2025-12-06T06:00:00.000Z	52 \| moderate	9.53 \| good	41.745 \| good	13.529 \| good	0.576 \| good	12.252 \| good	0.254 \| good
2025-12-06T07:00:00.000Z	54 \| moderate	10.915 \| good	52.761 \| good	15.536 \| good	0.57 \| good	12.415 \| good	0.247 \| good
2025-12-06T08:00:00.000Z	56 \| moderate	11.945 \| good	57 \| fine	13.586 \| good	0.57 \| good	12.766 \| good	0.247 \| good
2025-12-06T09:00:00.000Z	56 \| moderate	11.974 \| good	42.108 \| good	17.381 \| good	0.702 \| good	8.333 \| good	0.247 \| good
2025-12-06T10:00:00.000Z	56 \| moderate	12.218 \| fine	39.325 \| good	16.665 \| good	0.643 \| good	8.968 \| good	0.247 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	12.641 \| fine	47.393 \| good	12.194 \| good	0.59 \| good	9.556 \| good	0.301 \| good
2025-12-06T12:00:00.000Z	62 \| moderate	15.25 \| fine	56.299 \| fine	11.402 \| good	0.518 \| good	10.936 \| good	0.247 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	17.321 \| fine	31.817 \| good	11.165 \| good	0.466 \| good	10.987 \| good	0.28 \| good
2025-12-06T14:00:00.000Z	86 \| moderate	27.912 \| fine	100.275 \| fine	6.898 \| good	0.525 \| good	10.561 \| good	0.318 \| good
2025-12-06T15:00:00.000Z	81 \| moderate	25.309 \| fine	55.698 \| fine	7.539 \| good	0.592 \| good	8.172 \| good	0.28 \| good
2025-12-06T16:00:00.000Z	69 \| moderate	18.847 \| fine	51.546 \| good	10.293 \| good	0.626 \| good	7.048 \| good	0.284 \| good
2025-12-06T17:00:00.000Z	66 \| moderate	17.292 \| fine	31.187 \| good	14.275 \| good	1.382 \| good	6.392 \| good	0.284 \| good
2025-12-06T18:00:00.000Z	60 \| moderate	13.61 \| fine	31.994 \| good	17.629 \| good	1.773 \| good	6.26 \| good	0.284 \| good
2025-12-06T19:00:00.000Z	58 \| moderate	12.961 \| fine	63.672 \| fine	19.124 \| good	3.642 \| good	5.545 \| good	0.288 \| good
2025-12-06T20:00:00.000Z	49 \| good	8.638 \| good	43.561 \| good	21.353 \| good	2.223 \| good	6.911 \| good	0.259 \| good
2025-12-06T21:00:00.000Z	52 \| moderate	10.053 \| good	50.352 \| good	21.966 \| good	1.59 \| good	7.029 \| good	0.226 \| good
2025-12-06T22:00:00.000Z	56 \| moderate	8.43 \| good	64.735 \| fine	21.856 \| good	1.21 \| good	8.683 \| good	0.317 \| good
2025-12-06T23:00:00.000Z	44 \| good	8.387 \| good	41.704 \| good	23.772 \| good	0.795 \| good	12.242 \| good	0.321 \| good
2025-12-07T00:00:00.000Z	52 \| moderate	9.812 \| good	46.819 \| good	19.476 \| good	0.933 \| good	14.949 \| good	0.321 \| good
2025-12-07T01:00:00.000Z	60 \| moderate	14.286 \| fine	56.613 \| fine	18.266 \| good	1.103 \| good	11.071 \| good	0.284 \| good
2025-12-07T02:00:00.000Z	60 \| moderate	13.91 \| fine	56.571 \| fine	18.469 \| good	1.143 \| good	9.252 \| good	0.291 \| good
2025-12-07T03:00:00.000Z	60 \| moderate	13.779 \| fine	59.48 \| fine	19.987 \| good	0.86 \| good	9.384 \| good	0.233 \| good
2025-12-07T04:00:00.000Z	58 \| moderate	13.216 \| fine	60.996 \| fine	19.109 \| good	0.858 \| good	9.622 \| good	0.233 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	14.639 \| fine	61.958 \| fine	18.789 \| good	1.01 \| good	10.504 \| good	0.291 \| good
2025-12-07T06:00:00.000Z	64 \| moderate	16.336 \| fine	57.791 \| fine	16.213 \| good	1.005 \| good	10.721 \| good	0.284 \| good
2025-12-07T07:00:00.000Z	66 \| moderate	16.768 \| fine	68.595 \| fine	16.206 \| good	0.98 \| good	10.061 \| good	0.276 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	15.525 \| fine	69.002 \| fine	12.491 \| good	0.723 \| good	6.334 \| good	0.22 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.418 \| fine	68.508 \| fine	11.708 \| good	0.701 \| good	6.045 \| good	0.218 \| good
2025-12-07T10:00:00.000Z	64 \| moderate	15.566 \| fine	69.207 \| fine	12.513 \| good	0.747 \| good	6.919 \| good	0.225 \| good
2025-12-07T11:00:00.000Z	64 \| moderate	15.578 \| fine	69.123 \| fine	8.18 \| good	0.793 \| good	7.793 \| good	0.231 \| good
2025-12-07T12:00:00.000Z	60 \| moderate	14.449 \| fine	64.564 \| fine	8.392 \| good	0.839 \| good	8.667 \| good	0.237 \| good
2025-12-07T13:00:00.000Z	66 \| moderate	16.564 \| fine	73.774 \| fine	11.64 \| good	0.983 \| good	10.344 \| good	0.276 \| good
2025-12-07T14:00:00.000Z	69 \| moderate	19.416 \| fine	85.484 \| fine	10.056 \| good	1.127 \| good	12.021 \| good	0.314 \| good
2025-12-07T15:00:00.000Z	79 \| moderate	24.336 \| fine	106.521 \| fine	12.128 \| good	1.271 \| good	13.698 \| good	0.353 \| good
2025-12-07T16:00:00.000Z	73 \| moderate	21.299 \| fine	93.761 \| fine	20.829 \| good	1.082 \| good	11.252 \| good	0.314 \| good
2025-12-07T17:00:00.000Z	71 \| moderate	19.904 \| fine	88.106 \| fine	23.039 \| good	0.892 \| good	8.806 \| good	0.276 \| good
2025-12-07T18:00:00.000Z	73 \| moderate	20.759 \| fine	90.941 \| fine	20.133 \| good	0.703 \| good	6.361 \| good	0.237 \| good
2025-12-07T19:00:00.000Z	75 \| moderate	21.688 \| fine	94.943 \| fine	20.781 \| good	0.888 \| good	7.343 \| good	0.239 \| good
2025-12-07T20:00:00.000Z	67 \| moderate	18.223 \| fine	80.587 \| fine	23.062 \| good	1.072 \| good	8.325 \| good	0.242 \| good
2025-12-07T21:00:00.000Z	60 \| moderate	13.846 \| fine	62.602 \| fine	20.671 \| good	1.257 \| good	9.308 \| good	0.244 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	10.643 \| good	47.209 \| good	19.994 \| good	1.178 \| good	9.018 \| good	0.237 \| good
2025-12-07T23:00:00.000Z	49 \| good	9.384 \| good	41.631 \| good	20.119 \| good	1.099 \| good	8.727 \| good	0.23 \| good
2025-12-08T00:00:00.000Z	49 \| good	9.425 \| good	42.309 \| good	19.138 \| good	1.019 \| good	8.437 \| good	0.224 \| good
2025-12-08T01:00:00.000Z	49 \| good	8.793 \| good	38.681 \| good	20.221 \| good	0.925 \| good	7.25 \| good	0.219 \| good
2025-12-08T02:00:00.000Z	49 \| good	8.917 \| good	39.39 \| good	16.568 \| good	0.83 \| good	6.063 \| good	0.213 \| good
2025-12-08T03:00:00.000Z	49 \| good	8.711 \| good	38.054 \| good	16.704 \| good	0.735 \| good	4.876 \| good	0.208 \| good
2025-12-08T04:00:00.000Z	44 \| good	8.4 \| good	36.874 \| good	16.153 \| good	0.717 \| good	4.704 \| good	0.206 \| good
2025-12-08T05:00:00.000Z	49 \| good	9.302 \| good	41.783 \| good	18.201 \| good	0.699 \| good	4.531 \| good	0.205 \| good
2025-12-08T06:00:00.000Z	49 \| good	8.532 \| good	37.36 \| good	18.962 \| good	0.68 \| good	4.358 \| good	0.203 \| good
2025-12-08T07:00:00.000Z	49 \| good	8.861 \| good	39.218 \| good	18.508 \| good	0.648 \| good	4.247 \| good	0.201 \| good
2025-12-08T08:00:00.000Z	44 \| good	8.026 \| good	35.118 \| good	17.622 \| good	0.615 \| good	4.135 \| good	0.198 \| good
2025-12-08T09:00:00.000Z	49 \| good	8.674 \| good	37.978 \| good	16.96 \| good	0.583 \| good	4.024 \| good	0.196 \| good
2025-12-08T10:00:00.000Z	49 \| good	9.191 \| good	40.648 \| good	14.809 \| good	0.574 \| good	4.369 \| good	0.197 \| good
2025-12-08T11:00:00.000Z	38 \| good	7.093 \| good	31.508 \| good	16.072 \| good	0.566 \| good	4.714 \| good	0.199 \| good
2025-12-08T12:00:00.000Z	38 \| good	7.227 \| good	31.68 \| good	17.328 \| good	0.557 \| good	5.06 \| good	0.2 \| good
2025-12-08T13:00:00.000Z	38 \| good	7.232 \| good	32.033 \| good	18.476 \| good	0.624 \| good	5.562 \| good	0.209 \| good
2025-12-08T14:00:00.000Z	38 \| good	6.909 \| good	30.66 \| good	20.7 \| good	0.691 \| good	6.064 \| good	0.217 \| good
2025-12-08T15:00:00.000Z	44 \| good	7.982 \| good	34.815 \| good	19.554 \| good	0.758 \| good	6.566 \| good	0.225 \| good
2025-12-08T16:00:00.000Z	38 \| good	7.333 \| good	32.204 \| good	19.479 \| good	0.994 \| good	5.891 \| good	0.216 \| good
2025-12-08T17:00:00.000Z	49 \| good	8.65 \| good	37.905 \| good	18.893 \| good	1.23 \| good	5.216 \| good	0.207 \| good
2025-12-08T18:00:00.000Z	44 \| good	8.115 \| good	35.626 \| good	21.806 \| good	1.466 \| good	4.542 \| good	0.198 \| good
2025-12-08T19:00:00.000Z	38 \| good	6.783 \| good	29.835 \| good	20.932 \| good	1.692 \| good	5.201 \| good	0.201 \| good
2025-12-08T20:00:00.000Z	38 \| good	7.314 \| good	32.243 \| good	22.106 \| good	1.919 \| good	5.861 \| good	0.203 \| good
2025-12-08T21:00:00.000Z	49 \| good	9.082 \| good	40.328 \| good	21.234 \| good	2.146 \| good	6.52 \| good	0.206 \| good
2025-12-08T22:00:00.000Z	49 \| good	9.024 \| good	40.313 \| good	15.984 \| good	2.136 \| good	12.738 \| good	0.258 \| good
2025-12-08T23:00:00.000Z	49 \| good	8.851 \| good	39.652 \| good	12.15 \| good	2.126 \| good	18.956 \| good	0.309 \| good
2025-12-09T00:00:00.000Z	52 \| moderate	10.263 \| good	45.424 \| good	12.056 \| good	2.116 \| good	25.174 \| good	0.361 \| good
2025-12-09T01:00:00.000Z	44 \| good	8.428 \| good	36.963 \| good	13.047 \| good	2.174 \| good	20.916 \| good	0.328 \| good
2025-12-09T02:00:00.000Z	33 \| good	5.729 \| good	25.558 \| good	13.236 \| good	2.233 \| good	16.658 \| good	0.296 \| good
2025-12-09T03:00:00.000Z	33 \| good	6.249 \| good	27.589 \| good	12.932 \| good	2.291 \| good	12.4 \| good	0.263 \| good
2025-12-09T04:00:00.000Z	33 \| good	6.086 \| good	27.067 \| good	12.944 \| good	2.033 \| good	10.39 \| good	0.246 \| good
2025-12-09T05:00:00.000Z	44 \| good	8.312 \| good	36.525 \| good	16.068 \| good	1.775 \| good	8.38 \| good	0.229 \| good
2025-12-09T06:00:00.000Z	52 \| moderate	10.358 \| good	10.501 \| good	23.246 \| good	1.519 \| good	6.389 \| good	0.212 \| good
2025-12-09T07:00:00.000Z	33 \| good	6.172 \| good	27.465 \| good	24.68 \| good	1.328 \| good	5.296 \| good	0.205 \| good

O'Fallon, Illinois live air quality index now

Major air pollutants in O'Fallon, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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