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

St. Charles, Missouri currently has a PM10 concentration of 31.449 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 0.308 ppb.

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

St. Charles, Missouri currently has an ozone (O3) concentration of 37.856 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 6.395 ppb.

Current air quality index in St. Charles, Missouri today

Q: What is the PM2.5 concentration in St. Charles, Missouri right now?

St. Charles, Missouri currently has a PM2.5 concentration of 8.098 μg/m3.

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)

Good

St. Charles, Missouri

Last updated: ... (Local time)

Common air pollutants in St. Charles, Missouri

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

8.10 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

31.45 μg/m³

155

255

425

605+

Ozone (O₃)

37.86 ppb

201

201+

Sulfur Dioxide (SO₂)

0.31 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.39 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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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
2026-04-22T07:00:00.000Z	41 \| good	4.779 \| good	20.374 \| good	43.848 \| good	1.082 \| good	6.909 \| good	0.196 \| good
2026-04-22T08:00:00.000Z	42 \| good	5.854 \| good	22.296 \| good	45.088 \| good	1.079 \| good	6.968 \| good	0.196 \| good
2026-04-22T09:00:00.000Z	37 \| good	5.572 \| good	21.065 \| good	39.9 \| good	0.549 \| good	5.305 \| good	0.196 \| good
2026-04-22T10:00:00.000Z	35 \| good	5.278 \| good	20.911 \| good	38.47 \| good	1.472 \| good	6.322 \| good	0.196 \| good
2026-04-22T11:00:00.000Z	36 \| good	5.258 \| good	19.84 \| good	38.648 \| good	0.956 \| good	12.479 \| good	0.196 \| good
2026-04-22T12:00:00.000Z	33 \| good	6.284 \| good	28.144 \| good	36.438 \| good	0.355 \| good	20.112 \| good	0.251 \| good
2026-04-22T13:00:00.000Z	38 \| good	6.974 \| good	31.866 \| good	36.758 \| good	0.799 \| good	17.023 \| good	0.284 \| good
2026-04-22T14:00:00.000Z	38 \| good	6.533 \| good	28.715 \| good	40.099 \| good	1.02 \| good	12.171 \| good	0.259 \| good
2026-04-22T15:00:00.000Z	38 \| good	4.724 \| good	17.902 \| good	41.218 \| good	0.697 \| good	12.094 \| good	0.251 \| good
2026-04-22T16:00:00.000Z	38 \| good	4.369 \| good	16.446 \| good	41.264 \| good	5.546 \| good	12.482 \| good	0.229 \| good
2026-04-22T17:00:00.000Z	42 \| good	3.579 \| good	15.488 \| good	44.904 \| good	5.147 \| good	12.058 \| good	0.199 \| good
2026-04-22T18:00:00.000Z	43 \| good	3.78 \| good	13.595 \| good	45.857 \| good	4.802 \| good	11.119 \| good	0.203 \| good
2026-04-22T19:00:00.000Z	43 \| good	5.078 \| good	22.73 \| good	46.279 \| good	6.873 \| good	13.062 \| good	0.203 \| good
2026-04-22T20:00:00.000Z	43 \| good	4.544 \| good	19.057 \| good	45.646 \| good	7.555 \| good	12.807 \| good	0.251 \| good
2026-04-22T21:00:00.000Z	41 \| good	4.792 \| good	21.65 \| good	44.004 \| good	6.801 \| good	11.938 \| good	0.196 \| good
2026-04-22T22:00:00.000Z	42 \| good	3.672 \| good	15.947 \| good	44.727 \| good	7.406 \| good	11.185 \| good	0.196 \| good
2026-04-22T23:00:00.000Z	41 \| good	3.745 \| good	16.281 \| good	44.309 \| good	6.879 \| good	11.044 \| good	0.251 \| good
2026-04-23T00:00:00.000Z	40 \| good	4.375 \| good	17.656 \| good	43.484 \| good	7.98 \| good	13.889 \| good	0.251 \| good
2026-04-23T01:00:00.000Z	36 \| good	3.553 \| good	21.053 \| good	38.703 \| good	5.872 \| good	13.738 \| good	0.251 \| good
2026-04-23T02:00:00.000Z	34 \| good	4.602 \| good	22.407 \| good	37.36 \| good	2.056 \| good	20.264 \| good	0.225 \| good
2026-04-23T03:00:00.000Z	29 \| good	5.477 \| good	19.894 \| good	31.225 \| good	1.335 \| good	20.26 \| good	0.314 \| good
2026-04-23T04:00:00.000Z	38 \| good	7.032 \| good	27.137 \| good	26.691 \| good	1.113 \| good	27.005 \| good	0.372 \| good
2026-04-23T05:00:00.000Z	27 \| good	5.163 \| good	24.948 \| good	28.355 \| good	1.624 \| good	17.198 \| good	0.247 \| good
2026-04-23T06:00:00.000Z	33 \| good	6.271 \| good	25.142 \| good	29.884 \| good	0.63 \| good	9.535 \| good	0.192 \| good
2026-04-23T07:00:00.000Z	33 \| good	5.744 \| good	23.366 \| good	29.094 \| good	0.626 \| good	8.707 \| good	0.195 \| good
2026-04-23T08:00:00.000Z	33 \| good	5.893 \| good	25.337 \| good	28.487 \| good	0.625 \| good	7.7 \| good	0.192 \| good
2026-04-23T09:00:00.000Z	27 \| good	4.587 \| good	22.156 \| good	24.183 \| good	0.276 \| good	10.344 \| good	0.196 \| good
2026-04-23T10:00:00.000Z	38 \| good	6.522 \| good	30.171 \| good	27.028 \| good	0.277 \| good	14.133 \| good	0.196 \| good
2026-04-23T11:00:00.000Z	38 \| good	7.385 \| good	33.437 \| good	28.59 \| good	0.372 \| good	18.01 \| good	0.251 \| good
2026-04-23T12:00:00.000Z	44 \| good	7.771 \| good	30.971 \| good	28.331 \| good	0.538 \| good	19.925 \| good	0.306 \| good
2026-04-23T13:00:00.000Z	44 \| good	8.376 \| good	44.758 \| good	30.944 \| good	0.349 \| good	17.412 \| good	0.339 \| good
2026-04-23T14:00:00.000Z	44 \| good	7.967 \| good	36.894 \| good	33.857 \| good	0.352 \| good	15.467 \| good	0.31 \| good
2026-04-23T15:00:00.000Z	54 \| moderate	10.509 \| good	47.218 \| good	37.377 \| good	0.424 \| good	14.316 \| good	0.251 \| good
2026-04-23T16:00:00.000Z	54 \| moderate	10.543 \| good	46.907 \| good	42.704 \| good	0.449 \| good	11.951 \| good	0.251 \| good
2026-04-23T17:00:00.000Z	52 \| moderate	10.248 \| good	42.218 \| good	42.884 \| good	0.437 \| good	9.988 \| good	0.254 \| good
2026-04-23T18:00:00.000Z	54 \| moderate	11.023 \| good	49.764 \| good	45.736 \| good	0.437 \| good	8.669 \| good	0.247 \| good
2026-04-23T19:00:00.000Z	52 \| moderate	10.013 \| good	49.212 \| good	47.804 \| good	0.354 \| good	8.225 \| good	0.247 \| good
2026-04-23T20:00:00.000Z	49 \| good	9.409 \| good	43.829 \| good	48.229 \| good	0.435 \| good	10.605 \| good	0.251 \| good
2026-04-23T21:00:00.000Z	49 \| good	9.48 \| good	40.388 \| good	47.496 \| good	0.434 \| good	8.701 \| good	0.254 \| good
2026-04-23T22:00:00.000Z	49 \| good	9.308 \| good	41.995 \| good	48.569 \| good	0.32 \| good	6.914 \| good	0.251 \| good
2026-04-23T23:00:00.000Z	72 \| moderate	11.764 \| good	98.141 \| fine	44.912 \| good	0.342 \| good	4.842 \| good	0.247 \| good
2026-04-24T00:00:00.000Z	44 \| good	7.841 \| good	34.638 \| good	43.485 \| good	0.408 \| good	5.169 \| good	0.251 \| good
2026-04-24T01:00:00.000Z	38 \| good	7.35 \| good	31.114 \| good	40.87 \| good	0.227 \| good	6.701 \| good	0.251 \| good
2026-04-24T02:00:00.000Z	44 \| good	7.88 \| good	36.106 \| good	41.086 \| good	0.214 \| good	9.09 \| good	0.251 \| good
2026-04-24T03:00:00.000Z	42 \| good	5.169 \| good	22.524 \| good	45.07 \| good	0.59 \| good	2.442 \| good	0.146 \| good
2026-04-24T04:00:00.000Z	44 \| good	8.092 \| good	39.655 \| good	39.485 \| good	0.19 \| good	11.306 \| good	0.192 \| good
2026-04-24T05:00:00.000Z	38 \| good	7.486 \| good	28.615 \| good	40.103 \| good	0.305 \| good	8.546 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	44 \| good	8.098 \| good	31.449 \| good	37.856 \| good	0.308 \| good	6.395 \| good	0.196 \| good
2026-04-24T06:00:00.000Z	44 \| good	8.098 \| good	31.449 \| good	37.856 \| good	0.308 \| good	6.395 \| good	0.196 \| good
2026-04-24T07:00:00.000Z	41 \| good	5.354 \| good	23.023 \| good	44.187 \| good	0.416 \| good	1.931 \| good	0.137 \| good
2026-04-24T08:00:00.000Z	44 \| good	4.373 \| good	19 \| good	47.01 \| good	0.368 \| good	1.847 \| good	0.132 \| good
2026-04-24T09:00:00.000Z	44 \| good	3.306 \| good	14.426 \| good	47.042 \| good	0.32 \| good	1.763 \| good	0.128 \| good
2026-04-24T10:00:00.000Z	43 \| good	2.961 \| good	12 \| good	45.939 \| good	0.386 \| good	2.058 \| good	0.128 \| good
2026-04-24T11:00:00.000Z	44 \| good	7.554 \| good	33.3 \| good	34.542 \| good	0.452 \| good	2.353 \| good	0.129 \| good
2026-04-24T12:00:00.000Z	38 \| good	7.197 \| good	31.728 \| good	28.985 \| good	0.518 \| good	2.649 \| good	0.129 \| good
2026-04-24T13:00:00.000Z	37 \| good	5.472 \| good	23.463 \| good	39.953 \| good	0.599 \| good	3.434 \| good	0.139 \| good
2026-04-24T14:00:00.000Z	40 \| good	6.177 \| good	27.722 \| good	42.939 \| good	0.679 \| good	4.219 \| good	0.149 \| good
2026-04-24T15:00:00.000Z	42 \| good	6.695 \| good	29.881 \| good	44.937 \| good	0.76 \| good	5.004 \| good	0.16 \| good
2026-04-24T16:00:00.000Z	44 \| good	7.617 \| good	33.441 \| good	47.702 \| good	0.701 \| good	4.079 \| good	0.153 \| good
2026-04-24T17:00:00.000Z	44 \| good	5.906 \| good	25.725 \| good	46.526 \| good	0.642 \| good	3.154 \| good	0.147 \| good
2026-04-24T18:00:00.000Z	42 \| good	5.077 \| good	21.967 \| good	44.804 \| good	0.582 \| good	2.229 \| good	0.141 \| good
2026-04-24T19:00:00.000Z	42 \| good	4.42 \| good	19.362 \| good	45.131 \| good	0.575 \| good	2.018 \| good	0.14 \| good
2026-04-24T20:00:00.000Z	43 \| good	6.806 \| good	30.236 \| good	46.25 \| good	0.568 \| good	1.807 \| good	0.139 \| good
2026-04-24T21:00:00.000Z	49 \| good	9.464 \| good	41.974 \| good	46.488 \| good	0.561 \| good	1.596 \| good	0.138 \| good
2026-04-24T22:00:00.000Z	49 \| good	9.418 \| good	41.834 \| good	46.554 \| good	0.558 \| good	2.888 \| good	0.148 \| good
2026-04-24T23:00:00.000Z	49 \| good	9.453 \| good	41.803 \| good	42.205 \| good	0.556 \| good	4.181 \| good	0.158 \| good
2026-04-25T00:00:00.000Z	38 \| good	4.223 \| good	18.173 \| good	41.129 \| good	0.554 \| good	5.473 \| good	0.167 \| good
2026-04-25T01:00:00.000Z	42 \| good	4.387 \| good	19.206 \| good	45.182 \| good	0.669 \| good	11.313 \| good	0.21 \| good
2026-04-25T02:00:00.000Z	42 \| good	4.458 \| good	19.322 \| good	45.094 \| good	0.784 \| good	17.153 \| good	0.253 \| good
2026-04-25T03:00:00.000Z	39 \| good	4.265 \| good	18.637 \| good	41.669 \| good	0.899 \| good	22.993 \| good	0.295 \| good
2026-04-25T04:00:00.000Z	35 \| good	4.017 \| good	17.36 \| good	38.063 \| good	0.803 \| good	20.05 \| good	0.276 \| good
2026-04-25T05:00:00.000Z	33 \| good	3.47 \| good	15.21 \| good	36.215 \| good	0.708 \| good	17.107 \| good	0.258 \| good
2026-04-25T06:00:00.000Z	32 \| good	3.558 \| good	15.302 \| good	34.676 \| good	0.612 \| good	14.164 \| good	0.239 \| good
2026-04-25T07:00:00.000Z	31 \| good	3.375 \| good	14.834 \| good	33.124 \| good	0.548 \| good	10.902 \| good	0.215 \| good
2026-04-25T08:00:00.000Z	26 \| good	3.59 \| good	15.821 \| good	27.947 \| good	0.485 \| good	7.64 \| good	0.192 \| good
2026-04-25T09:00:00.000Z	24 \| good	3.818 \| good	16.429 \| good	26.153 \| good	0.421 \| good	4.378 \| good	0.168 \| good
2026-04-25T10:00:00.000Z	31 \| good	5.008 \| good	21.554 \| good	32.674 \| good	0.445 \| good	4.266 \| good	0.167 \| good
2026-04-25T11:00:00.000Z	27 \| good	3.777 \| good	16.391 \| good	28.839 \| good	0.469 \| good	4.154 \| good	0.165 \| good
2026-04-25T12:00:00.000Z	25 \| good	3.252 \| good	14.143 \| good	27.475 \| good	0.493 \| good	4.042 \| good	0.164 \| good
2026-04-25T13:00:00.000Z	33 \| good	3.214 \| good	13.897 \| good	35.693 \| good	0.582 \| good	3.826 \| good	0.169 \| good
2026-04-25T14:00:00.000Z	37 \| good	3.741 \| good	16 \| good	40.014 \| good	0.671 \| good	3.61 \| good	0.174 \| good
2026-04-25T15:00:00.000Z	41 \| good	2.862 \| good	11.837 \| good	44.228 \| good	0.76 \| good	3.394 \| good	0.178 \| good
2026-04-25T16:00:00.000Z	43 \| good	4.534 \| good	19.69 \| good	46.049 \| good	0.775 \| good	2.674 \| good	0.171 \| good
2026-04-25T17:00:00.000Z	47 \| good	4.497 \| good	19.498 \| good	50.793 \| good	0.79 \| good	1.955 \| good	0.163 \| good
2026-04-25T18:00:00.000Z	50 \| good	4.345 \| good	18.93 \| good	53.946 \| good	0.805 \| good	1.235 \| good	0.156 \| good
2026-04-25T19:00:00.000Z	58 \| moderate	4.652 \| good	20.07 \| good	56.864 \| fine	0.758 \| good	1.158 \| good	0.153 \| good
2026-04-25T20:00:00.000Z	54 \| moderate	4.597 \| good	20 \| good	55.552 \| fine	0.712 \| good	1.082 \| good	0.149 \| good
2026-04-25T21:00:00.000Z	48 \| good	4.595 \| good	19.963 \| good	52.152 \| good	0.665 \| good	1.005 \| good	0.146 \| good
2026-04-25T22:00:00.000Z	44 \| good	4.998 \| good	21.764 \| good	48.457 \| good	0.667 \| good	2.115 \| good	0.155 \| good
2026-04-25T23:00:00.000Z	43 \| good	4.521 \| good	19.53 \| good	45.957 \| good	0.67 \| good	3.224 \| good	0.163 \| good
2026-04-26T00:00:00.000Z	41 \| good	4.56 \| good	19.792 \| good	44.233 \| good	0.672 \| good	4.334 \| good	0.172 \| good
2026-04-26T01:00:00.000Z	44 \| good	6.525 \| good	29.155 \| good	47.765 \| good	0.638 \| good	4.427 \| good	0.171 \| good
2026-04-26T02:00:00.000Z	40 \| good	5.053 \| good	21.833 \| good	43.284 \| good	0.603 \| good	4.521 \| good	0.169 \| good
2026-04-26T03:00:00.000Z	39 \| good	3.327 \| good	14.523 \| good	42.027 \| good	0.569 \| good	4.614 \| good	0.168 \| good
2026-04-26T04:00:00.000Z	39 \| good	2.976 \| good	11.967 \| good	42.115 \| good	0.623 \| good	4.248 \| good	0.165 \| good
2026-04-26T05:00:00.000Z	35 \| good	4.207 \| good	18.799 \| good	37.641 \| good	0.677 \| good	3.883 \| good	0.163 \| good
2026-04-26T06:00:00.000Z	43 \| good	2.967 \| good	3.199 \| good	46.358 \| good	0.733 \| good	3.54 \| good	0.16 \| good

St. Charles

Empower business decisions with accurate air quality data

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

0.20ppm

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 11:00:00, 2026-04-23.

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 09:00:00 on 2026-04-23.

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

The air quality in St. Charles, Missouri right now is Good, with an AQI of 44.

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 8.098 μg/m³.

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

St. Charles, Missouri currently has a PM₁₀ concentration of 31.449 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 0.196 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 0.308 ppb.

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

St. Charles, Missouri currently has an ozone (O₃) concentration of 37.856 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 6.395 ppb.

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