What is the current level of PM10 in St. Charles, Missouri?

St. Charles, Missouri currently has a PM10 concentration of 48.487 μg/m3.

What is the current level of sulfur dioxide (SO2) in St. Charles, Missouri?

The current sulfur dioxide (SO2) concentration in St. Charles, Missouri is 0.651 ppb.

What is the current level of ozone (O3) in St. Charles, Missouri?

St. Charles, Missouri currently has an ozone (O3) concentration of 12.488 ppm.

What is the current level of nitrogen dioxide (NO2) in St. Charles, Missouri?

The current level of nitrogen dioxide (NO2) in St. Charles, Missouri is 12.071 ppb.

Current air quality index in St. Charles, Missouri today

Name: Live air pollution levels in St. Charles, Missouri today
Creator: Ambee

Stay updated with real-time air quality in St. Charles, 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

St. Charles, Missouri

Last updated: ... (Local time)

Major air pollutants in St. Charles, Missouri

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.07 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

48.49 μg/m³

155

255

425

605+

Ozone (O₃)

12.49 ppb

201

201+

Sulfur Dioxide (SO₂)

0.65 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

12.07 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.45 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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St. Charles, Missouri

Scroll To Air Quality Map

Track live St. Charles, Missouri air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-04T11:00:00.000Z	40 \| good	2.986 \| good	11.426 \| good	42.798 \| good	0.19 \| good	10.713 \| good	0.192 \| good
2025-06-04T12:00:00.000Z	38 \| good	2.307 \| good	11.364 \| good	40.57 \| good	0.597 \| good	14.85 \| good	0.273 \| good
2025-06-04T13:00:00.000Z	44 \| good	8.16 \| good	35.646 \| good	36.072 \| good	0.337 \| good	2.69 \| good	0.198 \| good
2025-06-04T14:00:00.000Z	38 \| good	3.434 \| good	25.379 \| good	40.897 \| good	0.564 \| good	26.015 \| good	0.347 \| good
2025-06-04T15:00:00.000Z	40 \| good	5.695 \| good	43.405 \| good	37.034 \| good	0.64 \| good	19.869 \| good	0.346 \| good
2025-06-04T16:00:00.000Z	36 \| good	4.445 \| good	36.406 \| good	39.017 \| good	0.205 \| good	15.49 \| good	0.332 \| good
2025-06-04T17:00:00.000Z	33 \| good	4.435 \| good	28.389 \| good	36.484 \| good	0.209 \| good	11.479 \| good	0.328 \| good
2025-06-04T18:00:00.000Z	38 \| good	7.341 \| good	18.019 \| good	35.788 \| good	0.378 \| good	8.3 \| good	0.28 \| good
2025-06-04T19:00:00.000Z	52 \| moderate	10.215 \| good	42.776 \| good	37.194 \| good	0.243 \| good	9.326 \| good	0.286 \| good
2025-06-04T20:00:00.000Z	58 \| moderate	12.845 \| fine	46.345 \| good	34.207 \| good	0.245 \| good	11.933 \| good	0.325 \| good
2025-06-04T21:00:00.000Z	56 \| moderate	11.62 \| good	44.717 \| good	37.662 \| good	0.2 \| good	7.814 \| good	0.273 \| good
2025-06-04T22:00:00.000Z	44 \| good	7.686 \| good	41.671 \| good	34.404 \| good	0.52 \| good	14.346 \| good	0.184 \| good
2025-06-04T23:00:00.000Z	33 \| good	5.932 \| good	36.184 \| good	33.346 \| good	0.487 \| good	14.002 \| good	0.273 \| good
2025-06-05T00:00:00.000Z	28 \| good	3.396 \| good	27.735 \| good	30.284 \| good	0.535 \| good	16.302 \| good	0.23 \| good
2025-06-05T01:00:00.000Z	32 \| good	5.363 \| good	23.318 \| good	35.221 \| good	0.545 \| good	9.83 \| good	0.286 \| good
2025-06-05T02:00:00.000Z	49 \| good	9.451 \| good	46.316 \| good	33.57 \| good	0.499 \| good	9.515 \| good	0.235 \| good
2025-06-05T03:00:00.000Z	56 \| moderate	10.045 \| good	64.893 \| fine	32.911 \| good	0.545 \| good	7.581 \| good	0.234 \| good
2025-06-05T04:00:00.000Z	67 \| moderate	11.137 \| good	88.044 \| fine	33.022 \| good	0.574 \| good	6.424 \| good	0.226 \| good
2025-06-05T05:00:00.000Z	54 \| moderate	8.171 \| good	61.886 \| fine	27.516 \| good	0.57 \| good	3.936 \| good	0.26 \| good
2025-06-05T06:00:00.000Z	51 \| moderate	6.534 \| good	55.999 \| fine	27.379 \| good	0.626 \| good	4.1 \| good	0.26 \| good
2025-06-05T07:00:00.000Z	44 \| good	5.143 \| good	48.448 \| good	26.174 \| good	0.617 \| good	4.07 \| good	0.26 \| good
2025-06-05T08:00:00.000Z	31 \| good	3.92 \| good	33.478 \| good	26.022 \| good	0.621 \| good	4.124 \| good	0.264 \| good
2025-06-05T09:00:00.000Z	28 \| good	2.697 \| good	12.784 \| good	30.279 \| good	0.615 \| good	2.213 \| good	0.551 \| good
2025-06-05T10:00:00.000Z	29 \| good	2.481 \| good	15.189 \| good	31.458 \| good	0.567 \| good	2.442 \| good	0.404 \| good
2025-06-05T11:00:00.000Z	29 \| good	3.182 \| good	25.921 \| good	31.007 \| good	0.567 \| good	2.692 \| good	0.307 \| good
2025-06-05T12:00:00.000Z	71 \| moderate	14.18 \| fine	96.214 \| fine	31.677 \| good	0.578 \| good	3.233 \| good	0.307 \| good
2025-06-05T13:00:00.000Z	58 \| moderate	5.067 \| good	69.116 \| fine	30.496 \| good	0.605 \| good	3.369 \| good	0.307 \| good
2025-06-05T14:00:00.000Z	52 \| moderate	7.128 \| good	56.691 \| fine	32.851 \| good	0.556 \| good	2.915 \| good	0.307 \| good
2025-06-05T15:00:00.000Z	95 \| moderate	15.981 \| fine	144.475 \| fine	30.75 \| good	0.504 \| good	3.537 \| good	0.278 \| good
2025-06-05T16:00:00.000Z	78 \| moderate	12.817 \| fine	109.892 \| fine	32.93 \| good	0.531 \| good	2.762 \| good	0.275 \| good
2025-06-05T17:00:00.000Z	53 \| moderate	6.905 \| good	60.409 \| fine	36.968 \| good	0.502 \| good	2.806 \| good	0.312 \| good
2025-06-05T18:00:00.000Z	33 \| good	5.605 \| good	35.289 \| good	35.769 \| good	0.171 \| good	2.492 \| good	0.308 \| good
2025-06-05T19:00:00.000Z	53 \| moderate	7.157 \| good	58.894 \| fine	37.936 \| good	0.51 \| good	2.812 \| good	0.271 \| good
2025-06-05T20:00:00.000Z	56 \| moderate	7.457 \| good	65.055 \| fine	37.716 \| good	0.489 \| good	3.496 \| good	0.267 \| good
2025-06-05T21:00:00.000Z	52 \| moderate	8.1 \| good	57.729 \| fine	39.759 \| good	0.477 \| good	2.721 \| good	0.263 \| good
2025-06-05T22:00:00.000Z	51 \| moderate	8.294 \| good	55.436 \| fine	36.727 \| good	0.532 \| good	2.956 \| good	0.263 \| good
2025-06-05T23:00:00.000Z	38 \| good	6.997 \| good	38.904 \| good	35.532 \| good	0.641 \| good	3.05 \| good	0.203 \| good
2025-06-06T00:00:00.000Z	44 \| good	7.532 \| good	39.222 \| good	37.836 \| good	0.599 \| good	3.18 \| good	0.296 \| good
2025-06-06T01:00:00.000Z	49 \| good	8.638 \| good	34.219 \| good	35.859 \| good	0.668 \| good	3.763 \| good	0.262 \| good
2025-06-06T02:00:00.000Z	44 \| good	7.735 \| good	31.125 \| good	33.765 \| good	0.59 \| good	5.831 \| good	0.3 \| good
2025-06-06T03:00:00.000Z	44 \| good	8.496 \| good	32.188 \| good	26.533 \| good	0.543 \| good	7.756 \| good	0.34 \| good
2025-06-06T04:00:00.000Z	44 \| good	8.497 \| good	37.511 \| good	28.288 \| good	0.552 \| good	10.24 \| good	0.391 \| good
2025-06-06T05:00:00.000Z	49 \| good	9.043 \| good	34.904 \| good	20.495 \| good	0.517 \| good	19.415 \| good	0.484 \| good
2025-06-06T06:00:00.000Z	52 \| moderate	10.424 \| good	46.19 \| good	15.562 \| good	0.255 \| good	21.006 \| good	0.569 \| good
2025-06-06T07:00:00.000Z	54 \| moderate	11.004 \| good	35.828 \| good	17.969 \| good	0.261 \| good	21.903 \| good	0.569 \| good
2025-06-06T08:00:00.000Z	49 \| good	9.496 \| good	33.809 \| good	16.994 \| good	0.259 \| good	22.705 \| good	0.573 \| good
2025-06-06T09:00:00.000Z	54 \| moderate	11.072 \| good	48.487 \| good	12.488 \| good	0.651 \| good	12.071 \| good	0.451 \| good
2025-06-06T10:00:00.000Z	54 \| moderate	11.072 \| good	48.487 \| good	12.488 \| good	0.651 \| good	12.071 \| good	0.451 \| good
2025-06-06T11:00:00.000Z	66 \| moderate	17.367 \| fine	77.068 \| fine	16.992 \| good	0.612 \| good	6.612 \| good	0.297 \| good
2025-06-06T12:00:00.000Z	73 \| moderate	20.596 \| fine	90.32 \| fine	11.552 \| good	0.685 \| good	7.061 \| good	0.3 \| good
2025-06-06T13:00:00.000Z	71 \| moderate	19.903 \| fine	87.704 \| fine	18.357 \| good	1.076 \| good	2.125 \| good	0.249 \| good
2025-06-06T14:00:00.000Z	73 \| moderate	20.619 \| fine	91.039 \| fine	25.394 \| good	1.289 \| good	2.495 \| good	0.255 \| good
2025-06-06T15:00:00.000Z	81 \| moderate	25.398 \| fine	110.659 \| fine	25.069 \| good	1.501 \| good	2.865 \| good	0.26 \| good
2025-06-06T16:00:00.000Z	82 \| moderate	25.965 \| fine	113.068 \| fine	27.845 \| good	0.777 \| good	1.273 \| good	0.205 \| good
2025-06-06T17:00:00.000Z	75 \| moderate	22.301 \| fine	97.609 \| fine	28.551 \| good	0.928 \| good	1.501 \| good	0.205 \| good
2025-06-06T18:00:00.000Z	77 \| moderate	22.863 \| fine	99.966 \| fine	29.785 \| good	1.079 \| good	1.728 \| good	0.205 \| good
2025-06-06T19:00:00.000Z	73 \| moderate	21.215 \| fine	92.972 \| fine	31.438 \| good	0.963 \| good	1.787 \| good	0.201 \| good
2025-06-06T20:00:00.000Z	75 \| moderate	22.283 \| fine	97.737 \| fine	29.926 \| good	1.112 \| good	2.088 \| good	0.204 \| good
2025-06-06T21:00:00.000Z	71 \| moderate	19.937 \| fine	87.812 \| fine	26.325 \| good	1.261 \| good	2.39 \| good	0.208 \| good
2025-06-06T22:00:00.000Z	64 \| moderate	15.561 \| fine	68.815 \| fine	34.445 \| good	0.758 \| good	5.227 \| good	0.235 \| good
2025-06-06T23:00:00.000Z	56 \| moderate	12.23 \| fine	54.953 \| good	36.09 \| good	0.803 \| good	6.471 \| good	0.244 \| good
2025-06-07T00:00:00.000Z	71 \| moderate	19.656 \| fine	86.846 \| fine	42.571 \| good	0.849 \| good	7.714 \| good	0.253 \| good
2025-06-07T01:00:00.000Z	67 \| moderate	18.244 \| fine	80.9 \| fine	34.87 \| good	0.955 \| good	15.004 \| good	0.328 \| good
2025-06-07T02:00:00.000Z	75 \| moderate	21.548 \| fine	94.631 \| fine	33.18 \| good	1.049 \| good	17.926 \| good	0.344 \| good
2025-06-07T03:00:00.000Z	82 \| moderate	26.395 \| fine	114.483 \| fine	31.616 \| good	1.143 \| good	20.847 \| good	0.361 \| good
2025-06-07T04:00:00.000Z	92 \| moderate	30.938 \| fine	134.09 \| fine	30.964 \| good	0.105 \| good	20.768 \| good	0.407 \| good
2025-06-07T05:00:00.000Z	96 \| moderate	32.529 \| fine	140.895 \| fine	29.793 \| good	0.143 \| good	25.823 \| good	0.44 \| good
2025-06-07T06:00:00.000Z	96 \| moderate	32.852 \| fine	142.374 \| fine	28.486 \| good	0.181 \| good	30.878 \| good	0.472 \| good
2025-06-07T07:00:00.000Z	92 \| moderate	31.132 \| fine	135.127 \| fine	23.501 \| good	0.098 \| good	8.853 \| good	0.312 \| good
2025-06-07T08:00:00.000Z	90 \| moderate	30.451 \| fine	132.063 \| fine	23.382 \| good	0.126 \| good	10.591 \| good	0.329 \| good
2025-06-07T09:00:00.000Z	81 \| moderate	24.915 \| fine	108.962 \| fine	22.937 \| good	0.153 \| good	12.33 \| good	0.347 \| good
2025-06-07T10:00:00.000Z	71 \| moderate	20.022 \| fine	88.004 \| fine	25.858 \| good	0.063 \| good	5.368 \| good	0.285 \| good
2025-06-07T11:00:00.000Z	64 \| moderate	15.511 \| fine	68.846 \| fine	28.781 \| good	0.081 \| good	6.148 \| good	0.296 \| good
2025-06-07T12:00:00.000Z	56 \| moderate	12.326 \| fine	55.392 \| fine	29.118 \| good	0.099 \| good	6.929 \| good	0.306 \| good
2025-06-07T13:00:00.000Z	54 \| moderate	11.319 \| good	49.943 \| good	32.317 \| good	0.546 \| good	3.183 \| good	0.266 \| good
2025-06-07T14:00:00.000Z	58 \| moderate	12.733 \| fine	56.965 \| fine	31.149 \| good	0.67 \| good	3.783 \| good	0.275 \| good
2025-06-07T15:00:00.000Z	62 \| moderate	15.253 \| fine	67.886 \| fine	27.625 \| good	0.794 \| good	4.383 \| good	0.285 \| good
2025-06-07T16:00:00.000Z	64 \| moderate	16.006 \| fine	71.546 \| fine	30.225 \| good	1.104 \| good	2.147 \| good	0.226 \| good
2025-06-07T17:00:00.000Z	64 \| moderate	15.841 \| fine	70.671 \| fine	35.147 \| good	1.179 \| good	2.345 \| good	0.23 \| good
2025-06-07T18:00:00.000Z	69 \| moderate	18.72 \| fine	82.53 \| fine	38.251 \| good	1.254 \| good	2.543 \| good	0.234 \| good
2025-06-07T19:00:00.000Z	62 \| moderate	14.574 \| fine	65.253 \| fine	54.64 \| good	0.947 \| good	1.774 \| good	0.206 \| good
2025-06-07T20:00:00.000Z	47 \| good	7.829 \| good	34.405 \| good	50.761 \| good	1.1 \| good	2.046 \| good	0.211 \| good
2025-06-07T21:00:00.000Z	44 \| good	3.164 \| good	13.441 \| good	48.354 \| good	1.253 \| good	2.318 \| good	0.216 \| good
2025-06-07T22:00:00.000Z	43 \| good	0.73 \| good	2.671 \| good	46.486 \| good	0.419 \| good	3.659 \| good	0.193 \| good
2025-06-07T23:00:00.000Z	44 \| good	2.409 \| good	9.869 \| good	47.161 \| good	0.586 \| good	4.607 \| good	0.207 \| good
2025-06-08T00:00:00.000Z	44 \| good	5.547 \| good	23.943 \| good	48.113 \| good	0.752 \| good	5.556 \| good	0.221 \| good
2025-06-08T01:00:00.000Z	42 \| good	5.486 \| good	23.345 \| good	45.189 \| good	0.41 \| good	3.835 \| good	0.178 \| good
2025-06-08T02:00:00.000Z	38 \| good	6.724 \| good	29.833 \| good	40.481 \| good	0.555 \| good	4.863 \| good	0.19 \| good
2025-06-08T03:00:00.000Z	38 \| good	7.441 \| good	32.813 \| good	39.019 \| good	0.7 \| good	5.892 \| good	0.201 \| good
2025-06-08T04:00:00.000Z	52 \| moderate	9.977 \| good	44.32 \| good	39.585 \| good	0.3 \| good	2.424 \| good	0.181 \| good
2025-06-08T05:00:00.000Z	54 \| moderate	11.356 \| good	50.295 \| good	36.213 \| good	0.376 \| good	2.888 \| good	0.176 \| good
2025-06-08T06:00:00.000Z	28 \| good	2.891 \| good	2.954 \| good	29.966 \| good	0.461 \| good	3.412 \| good	0.171 \| good
2025-06-08T07:00:00.000Z	52 \| moderate	10.341 \| good	45.711 \| good	34.08 \| good	0.295 \| good	2.525 \| good	0.198 \| good
2025-06-08T08:00:00.000Z	54 \| moderate	10.715 \| good	47.605 \| good	31.26 \| good	0.34 \| good	2.677 \| good	0.198 \| good
2025-06-08T09:00:00.000Z	49 \| good	9.122 \| good	40.797 \| good	35.918 \| good	0.385 \| good	2.829 \| good	0.198 \| good
2025-06-08T10:00:00.000Z	44 \| good	8.3 \| good	36.776 \| good	34.829 \| good	0.482 \| good	2.2 \| good	0.198 \| good

St. Charles

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near St. Charles, Missouri

0.45ppm

How accurate is Missouri, USA air quality data?

The air quality data for Missouri, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for St. Charles, Missouri get updated?

Air quality updates for St. Charles, Missouri are available every hour.

What time in the past 24 hours saw the poorest air quality in St. Charles, Missouri?

St. Charles, Missouri experienced its worst air quality at 03:00:00, 2025-06-05.

When was air quality in St. Charles, Missouri the best over the past 24 hours?

The best air quality in St. Charles, Missouri was observed at 11:00:00 on 2025-06-05.

What is the air quality in St. Charles, Missouri right now?

The air quality in St. Charles, Missouri right now is Moderate, with an AQI of 54.

What pollutant is most frequently found in St. Charles, Missouri?

In St. Charles, Missouri, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in St. Charles, Missouri is poor?

When air quality in St. Charles, Missouri is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in St. Charles, Missouri right now?

St. Charles, Missouri currently has a PM_2.5 concentration of 11.072 μg/m³.

What is the current level of PM₁₀ in St. Charles, Missouri?

St. Charles, Missouri currently has a PM₁₀ concentration of 48.487 μg/m³.

What is the current level of carbon monoxide (CO) in St. Charles, Missouri?

The current carbon monoxide (CO) level in St. Charles, Missouri is 0.451 ppm.

What is the current level of sulfur dioxide (SO₂) in St. Charles, Missouri?

The current sulfur dioxide (SO₂) concentration in St. Charles, Missouri is 0.651 ppb.

What is the current level of ozone (O₃) in St. Charles, Missouri?

St. Charles, Missouri currently has an ozone (O₃) concentration of 12.488 ppm.

What is the current level of nitrogen dioxide (NO₂) in St. Charles, Missouri?

The current level of nitrogen dioxide (NO₂) in St. Charles, Missouri is 12.071 ppb.

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