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

St. Charles, Missouri currently has a PM10 concentration of 32.925 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 1.198 ppb.

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

St. Charles, Missouri currently has an ozone (O3) concentration of 51.163 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 3.513 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 8.694 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)

8.69 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

32.92 μg/m³

155

255

425

605+

Ozone (O₃)

51.16 ppb

201

201+

Sulfur Dioxide (SO₂)

1.20 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.51 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
2026-10-21T00:00:00.000Z	40 \| good	6 \| good	29.556 \| good	42.867 \| good	1.209 \| good	31.874 \| good	0.437 \| good
2026-10-21T01:00:00.000Z	47 \| good	7.676 \| good	50.823 \| good	38.709 \| good	0.765 \| good	31.805 \| good	0.639 \| good
2026-10-21T02:00:00.000Z	54 \| moderate	10.701 \| good	49.556 \| good	35.836 \| good	0.972 \| good	32.193 \| good	0.65 \| good
2026-10-21T03:00:00.000Z	73 \| moderate	21.213 \| fine	93.074 \| fine	10.254 \| good	1.655 \| good	34.788 \| good	0.331 \| good
2026-10-21T04:00:00.000Z	58 \| moderate	13.308 \| fine	61.286 \| fine	26.442 \| good	1.096 \| good	34.226 \| good	0.64 \| good
2026-10-21T05:00:00.000Z	62 \| moderate	15.393 \| fine	58.144 \| fine	20.829 \| good	0.95 \| good	28.093 \| good	0.82 \| good
2026-10-21T06:00:00.000Z	64 \| moderate	15.559 \| fine	44.369 \| good	18.586 \| good	1.05 \| good	27.755 \| good	0.958 \| good
2026-10-21T07:00:00.000Z	62 \| moderate	15.235 \| fine	48.149 \| good	15.567 \| good	1.049 \| good	27.935 \| good	0.958 \| good
2026-10-21T08:00:00.000Z	62 \| moderate	14.733 \| fine	50.501 \| good	16.466 \| good	1.049 \| good	27.509 \| good	0.958 \| good
2026-10-21T09:00:00.000Z	60 \| moderate	13.976 \| fine	50.631 \| good	10.493 \| good	1.014 \| good	25.963 \| good	0.836 \| good
2026-10-21T10:00:00.000Z	58 \| moderate	13.301 \| fine	57.866 \| fine	10.159 \| good	0.621 \| good	25.614 \| good	0.813 \| good
2026-10-21T11:00:00.000Z	62 \| moderate	14.543 \| fine	47.716 \| good	7.743 \| good	1.105 \| good	23.195 \| good	0.779 \| good
2026-10-21T12:00:00.000Z	56 \| moderate	11.623 \| good	53.547 \| good	5.663 \| good	1.148 \| good	21.092 \| good	0.874 \| good
2026-10-21T13:00:00.000Z	60 \| moderate	13.75 \| fine	55.428 \| fine	6.291 \| good	1.145 \| good	20.124 \| good	0.877 \| good
2026-10-21T14:00:00.000Z	63 \| moderate	13.789 \| fine	78.679 \| fine	9.692 \| good	1.91 \| good	23.113 \| good	1.025 \| good
2026-10-21T15:00:00.000Z	62 \| moderate	14.847 \| fine	62.179 \| fine	12.484 \| good	1.776 \| good	28.133 \| good	0.739 \| good
2026-10-21T16:00:00.000Z	60 \| moderate	13.59 \| fine	64.084 \| fine	15.339 \| good	1.077 \| good	21.394 \| good	0.536 \| good
2026-10-21T17:00:00.000Z	56 \| moderate	11.691 \| good	48.007 \| good	27.617 \| good	1.53 \| good	18.414 \| good	0.417 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.114 \| good	41.523 \| good	36.011 \| good	2.656 \| good	14.73 \| good	0.295 \| good
2026-10-21T19:00:00.000Z	54 \| moderate	10.992 \| good	45.098 \| good	43.212 \| good	2.204 \| good	11.214 \| good	0.311 \| good
2026-10-21T20:00:00.000Z	44 \| good	8.22 \| good	37.584 \| good	47.72 \| good	1.084 \| good	11.667 \| good	0.257 \| good
2026-10-21T21:00:00.000Z	48 \| good	8.307 \| good	34.215 \| good	51.595 \| good	1.114 \| good	13.825 \| good	0.255 \| good
2026-10-21T22:00:00.000Z	47 \| good	7.552 \| good	30.808 \| good	50.835 \| good	0.867 \| good	12.646 \| good	0.233 \| good
2026-10-21T23:00:00.000Z	44 \| good	7.247 \| good	33.969 \| good	47.875 \| good	0.832 \| good	5.968 \| good	0.233 \| good
2026-10-22T00:00:00.000Z	44 \| good	7.669 \| good	29.149 \| good	45.692 \| good	0.731 \| good	14.07 \| good	0.291 \| good
2026-10-22T01:00:00.000Z	44 \| good	7.739 \| good	28.288 \| good	43.456 \| good	1.018 \| good	33.864 \| good	0.639 \| good
2026-10-22T02:00:00.000Z	54 \| moderate	10.509 \| good	32.594 \| good	38.035 \| good	0.784 \| good	26.979 \| good	0.688 \| good
2026-10-22T03:00:00.000Z	66 \| moderate	16.933 \| fine	75.349 \| fine	22.007 \| good	3.689 \| good	52.087 \| good	0.564 \| good
2026-10-22T04:00:00.000Z	58 \| moderate	13.035 \| fine	57.343 \| fine	23.147 \| good	1.2 \| good	33.093 \| good	0.935 \| good
2026-10-22T05:00:00.000Z	62 \| moderate	14.997 \| fine	53.106 \| good	23.613 \| good	0.869 \| good	29.26 \| good	0.972 \| good
2026-10-22T06:00:00.000Z	66 \| moderate	16.697 \| fine	64.291 \| fine	19.709 \| good	0.645 \| good	24.528 \| good	0.896 \| good
2026-10-22T07:00:00.000Z	66 \| moderate	16.847 \| fine	47.878 \| good	14.834 \| good	0.65 \| good	24.462 \| good	0.896 \| good
2026-10-22T08:00:00.000Z	54 \| moderate	10.841 \| good	48.196 \| good	20.818 \| good	0.651 \| good	25.413 \| good	0.861 \| good
2026-10-22T09:00:00.000Z	52 \| moderate	9.532 \| good	42.943 \| good	10.437 \| good	0.524 \| good	15.834 \| good	0.791 \| good
2026-10-22T10:00:00.000Z	52 \| moderate	10.239 \| good	56.177 \| fine	10.304 \| good	0.599 \| good	14.198 \| good	0.697 \| good
2026-10-22T11:00:00.000Z	54 \| moderate	11.414 \| good	56.302 \| fine	7.783 \| good	0.632 \| good	15.292 \| good	0.722 \| good
2026-10-22T12:00:00.000Z	54 \| moderate	11.319 \| good	55.167 \| fine	8.432 \| good	0.847 \| good	14.993 \| good	0.782 \| good
2026-10-22T13:00:00.000Z	56 \| moderate	12.422 \| fine	61.524 \| fine	7.419 \| good	0.845 \| good	15.681 \| good	0.762 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	11.423 \| good	59.177 \| fine	10.824 \| good	0.925 \| good	16.824 \| good	0.866 \| good
2026-10-22T15:00:00.000Z	54 \| moderate	10.824 \| good	56.769 \| fine	13.073 \| good	1.153 \| good	19.016 \| good	0.761 \| good
2026-10-22T16:00:00.000Z	67 \| moderate	17.962 \| fine	79.456 \| fine	13.547 \| good	1.102 \| good	17.698 \| good	0.716 \| good
2026-10-22T17:00:00.000Z	60 \| moderate	14.483 \| fine	60.567 \| fine	29.072 \| good	2.041 \| good	13.537 \| good	0.536 \| good
2026-10-22T18:00:00.000Z	60 \| moderate	14.466 \| fine	53.419 \| good	35.69 \| good	2.281 \| good	9.637 \| good	0.475 \| good
2026-10-22T19:00:00.000Z	56 \| moderate	11.555 \| good	59.344 \| fine	37.766 \| good	2.024 \| good	7.411 \| good	0.367 \| good
2026-10-22T20:00:00.000Z	49 \| good	8.941 \| good	39.468 \| good	48.187 \| good	1.335 \| good	6.895 \| good	0.196 \| good
2026-10-22T21:00:00.000Z	48 \| good	8.073 \| good	43.941 \| good	51.947 \| good	1.133 \| good	3.788 \| good	0.196 \| good
2026-10-22T22:00:00.000Z	48 \| good	7.383 \| good	27.532 \| good	52.202 \| good	1.122 \| good	3.371 \| good	0.196 \| good
2026-10-22T23:00:00.000Z	49 \| good	8.694 \| good	32.925 \| good	51.163 \| good	1.198 \| good	3.513 \| good	0.196 \| good
2026-10-22T23:00:00.000Z	49 \| good	8.694 \| good	32.925 \| good	51.163 \| good	1.198 \| good	3.513 \| good	0.196 \| good
2026-10-23T00:00:00.000Z	66 \| moderate	17.471 \| fine	77.229 \| fine	38.443 \| good	2.378 \| good	32.907 \| good	0.357 \| good
2026-10-23T01:00:00.000Z	67 \| moderate	17.703 \| fine	78.072 \| fine	31.521 \| good	2.542 \| good	46.205 \| good	0.426 \| good
2026-10-23T02:00:00.000Z	69 \| moderate	18.708 \| fine	82.863 \| fine	29.479 \| good	2.627 \| good	48.651 \| good	0.48 \| good
2026-10-23T03:00:00.000Z	67 \| moderate	18.113 \| fine	80.069 \| fine	21.819 \| good	2.619 \| good	48.025 \| good	0.514 \| good
2026-10-23T04:00:00.000Z	64 \| moderate	15.774 \| fine	70.461 \| fine	15.067 \| good	2.565 \| good	47.088 \| good	0.532 \| good
2026-10-23T05:00:00.000Z	60 \| moderate	14.379 \| fine	64.328 \| fine	12.707 \| good	2.364 \| good	44.977 \| good	0.529 \| good
2026-10-23T06:00:00.000Z	60 \| moderate	14.052 \| fine	62.792 \| fine	12.253 \| good	2.028 \| good	41.322 \| good	0.49 \| good
2026-10-23T07:00:00.000Z	60 \| moderate	13.535 \| fine	60.718 \| fine	10.644 \| good	1.733 \| good	37.761 \| good	0.434 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	13.778 \| fine	61.798 \| fine	11.838 \| good	1.486 \| good	32.442 \| good	0.38 \| good
2026-10-23T09:00:00.000Z	60 \| moderate	14.404 \| fine	64.657 \| fine	10.772 \| good	1.301 \| good	25.392 \| good	0.34 \| good
2026-10-23T10:00:00.000Z	62 \| moderate	15.104 \| fine	67.699 \| fine	10.751 \| good	1.181 \| good	21.206 \| good	0.315 \| good
2026-10-23T11:00:00.000Z	66 \| moderate	16.635 \| fine	73.699 \| fine	7.989 \| good	1.123 \| good	19.369 \| good	0.304 \| good
2026-10-23T12:00:00.000Z	67 \| moderate	17.861 \| fine	79.327 \| fine	3.608 \| good	1.144 \| good	20.477 \| good	0.306 \| good
2026-10-23T13:00:00.000Z	73 \| moderate	20.862 \| fine	91.811 \| fine	8.756 \| good	1.228 \| good	20.843 \| good	0.329 \| good
2026-10-23T14:00:00.000Z	75 \| moderate	21.896 \| fine	96.169 \| fine	20.274 \| good	1.281 \| good	16.288 \| good	0.332 \| good
2026-10-23T15:00:00.000Z	67 \| moderate	18.05 \| fine	79.854 \| fine	29.502 \| good	1.518 \| good	12.522 \| good	0.294 \| good
2026-10-23T16:00:00.000Z	60 \| moderate	14.472 \| fine	64.937 \| fine	41.594 \| good	1.848 \| good	9.075 \| good	0.254 \| good
2026-10-23T17:00:00.000Z	54 \| moderate	10.814 \| good	47.925 \| good	49.107 \| good	2.175 \| good	6.091 \| good	0.222 \| good
2026-10-23T18:00:00.000Z	54 \| moderate	10.72 \| good	47.724 \| good	51.986 \| good	2.084 \| good	3.31 \| good	0.193 \| good
2026-10-23T19:00:00.000Z	54 \| moderate	11.1 \| good	48.925 \| good	54.73 \| good	1.887 \| good	2.408 \| good	0.185 \| good
2026-10-23T20:00:00.000Z	54 \| moderate	11.168 \| good	49.54 \| good	55.946 \| fine	1.767 \| good	2.124 \| good	0.183 \| good
2026-10-23T21:00:00.000Z	54 \| moderate	10.803 \| good	47.702 \| good	56.469 \| fine	1.713 \| good	2.254 \| good	0.183 \| good
2026-10-23T22:00:00.000Z	58 \| moderate	13.112 \| fine	59.182 \| fine	50.078 \| good	1.669 \| good	3.135 \| good	0.187 \| good
2026-10-23T23:00:00.000Z	66 \| moderate	16.615 \| fine	73.347 \| fine	39.148 \| good	1.586 \| good	8.01 \| good	0.216 \| good
2026-10-24T00:00:00.000Z	67 \| moderate	17.925 \| fine	79.194 \| fine	35.819 \| good	1.532 \| good	12.598 \| good	0.243 \| good
2026-10-24T01:00:00.000Z	66 \| moderate	16.597 \| fine	74.003 \| fine	32.395 \| good	1.47 \| good	13.145 \| good	0.242 \| good
2026-10-24T02:00:00.000Z	62 \| moderate	15.205 \| fine	67.66 \| fine	34.793 \| good	1.418 \| good	12.712 \| good	0.238 \| good
2026-10-24T03:00:00.000Z	64 \| moderate	15.52 \| fine	69.42 \| fine	30.63 \| good	1.382 \| good	11.691 \| good	0.233 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	15.263 \| fine	67.966 \| fine	29.315 \| good	1.361 \| good	10.667 \| good	0.229 \| good
2026-10-24T05:00:00.000Z	60 \| moderate	14.298 \| fine	63.891 \| fine	28.106 \| good	1.335 \| good	9.445 \| good	0.226 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	14.157 \| fine	63.891 \| fine	26.483 \| good	1.302 \| good	8.296 \| good	0.223 \| good
2026-10-24T07:00:00.000Z	58 \| moderate	12.624 \| fine	56.72 \| fine	21.523 \| good	1.271 \| good	7.761 \| good	0.222 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	12.042 \| good	54.189 \| good	20.557 \| good	1.238 \| good	7.704 \| good	0.224 \| good
2026-10-24T09:00:00.000Z	56 \| moderate	11.773 \| good	52.599 \| good	18.667 \| good	1.203 \| good	8.075 \| good	0.227 \| good
2026-10-24T10:00:00.000Z	56 \| moderate	11.732 \| good	51.772 \| good	13.943 \| good	1.182 \| good	8.588 \| good	0.23 \| good
2026-10-24T11:00:00.000Z	56 \| moderate	12.492 \| fine	56.379 \| fine	11.549 \| good	1.18 \| good	9.248 \| good	0.234 \| good
2026-10-24T12:00:00.000Z	54 \| moderate	10.745 \| good	47.489 \| good	9.403 \| good	1.21 \| good	11.188 \| good	0.243 \| good
2026-10-24T13:00:00.000Z	56 \| moderate	12.224 \| fine	55.132 \| fine	13.519 \| good	1.264 \| good	13.269 \| good	0.26 \| good
2026-10-24T14:00:00.000Z	60 \| moderate	14.394 \| fine	64.843 \| fine	23.514 \| good	1.313 \| good	11.222 \| good	0.269 \| good
2026-10-24T15:00:00.000Z	56 \| moderate	11.571 \| good	50.959 \| good	31.828 \| good	1.489 \| good	8.594 \| good	0.25 \| good
2026-10-24T16:00:00.000Z	52 \| moderate	9.549 \| good	42.922 \| good	39.092 \| good	1.669 \| good	6.817 \| good	0.234 \| good
2026-10-24T17:00:00.000Z	40 \| good	6.629 \| good	29.731 \| good	43.436 \| good	1.8 \| good	5.019 \| good	0.213 \| good
2026-10-24T18:00:00.000Z	44 \| good	6.524 \| good	29.218 \| good	47.024 \| good	1.78 \| good	3.542 \| good	0.196 \| good
2026-10-24T19:00:00.000Z	47 \| good	8.397 \| good	36.957 \| good	51.047 \| good	1.762 \| good	2.647 \| good	0.184 \| good
2026-10-24T20:00:00.000Z	48 \| good	7.484 \| good	32.876 \| good	52.141 \| good	1.684 \| good	2.39 \| good	0.179 \| good
2026-10-24T21:00:00.000Z	46 \| good	7.949 \| good	34.696 \| good	50.48 \| good	1.599 \| good	2.449 \| good	0.177 \| good
2026-10-24T22:00:00.000Z	52 \| moderate	10.406 \| good	46.224 \| good	47.006 \| good	1.53 \| good	3.424 \| good	0.182 \| good
2026-10-24T23:00:00.000Z	58 \| moderate	12.527 \| fine	56.288 \| fine	41.365 \| good	1.441 \| good	8.606 \| good	0.21 \| 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 04:00:00, 2026-10-22.

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 01:00:00 on 2026-10-22.

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 49.

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 8.694 μg/m³.

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

St. Charles, Missouri currently has a PM₁₀ concentration of 32.925 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 1.198 ppb.

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

St. Charles, Missouri currently has an ozone (O₃) concentration of 51.163 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 3.513 ppb.

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