What is the PM10 level in St. Charles, Illinois at the moment?

The PM10 concentration in St. Charles, Illinois is 73.098 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in St. Charles, Illinois at the moment?

Currently, St. Charles, Illinois has a sulfur dioxide (SO2) concentration of 2.433 ppb.

What is the ozone (O3) level in St. Charles, Illinois at the moment?

The current ozone (O3) level in St. Charles, Illinois at the moment is 27.856 ppm.

What is the nitrogen dioxide (NO2) level in St. Charles, Illinois at the moment?

Nitrogen dioxide (NO2) level in St. Charles, Illinois at the moment is 3.72 ppb.

Live air quality index in St. Charles, Illinois today

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

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

St. Charles, Illinois

Last updated: ... (Local time)

Major air pollutants in St. Charles, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

31.45 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

130.18 μg/m³

155

255

425

605+

Ozone (O₃)

40.06 ppb

201

201+

Sulfur Dioxide (SO₂)

1.06 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.17 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

St. Charles, Illinois

Get Live Pollen Counts

St. Charles, Illinois

Scroll To Air Quality Map

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

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-20T18:00:00.000Z	32 \| good	4.726 \| good	20.86 \| good	34.687 \| good	0.378 \| good	1.543 \| good	0.216 \| good
2025-07-20T19:00:00.000Z	30 \| good	5.136 \| good	17.007 \| good	31.932 \| good	0.41 \| good	1.788 \| good	0.216 \| good
2025-07-20T20:00:00.000Z	34 \| good	5.95 \| good	33.594 \| good	36.981 \| good	0.453 \| good	1.442 \| good	0.19 \| good
2025-07-20T21:00:00.000Z	33 \| good	6.209 \| good	25.003 \| good	35.46 \| good	0.51 \| good	1.404 \| good	0.19 \| good
2025-07-20T22:00:00.000Z	33 \| good	5.971 \| good	25.995 \| good	35.473 \| good	0.409 \| good	1.221 \| good	0.135 \| good
2025-07-20T23:00:00.000Z	33 \| good	6.268 \| good	27.57 \| good	35.865 \| good	0.396 \| good	3.446 \| good	0.172 \| good
2025-07-21T00:00:00.000Z	33 \| good	5.875 \| good	27.58 \| good	35.732 \| good	0.378 \| good	3.37 \| good	0.229 \| good
2025-07-21T01:00:00.000Z	33 \| good	6.126 \| good	27.515 \| good	36.174 \| good	0.415 \| good	4.096 \| good	0.241 \| good
2025-07-21T02:00:00.000Z	30 \| good	5.226 \| good	20.996 \| good	31.926 \| good	0.453 \| good	8.684 \| good	0.241 \| good
2025-07-21T03:00:00.000Z	33 \| good	5.993 \| good	20.241 \| good	35.128 \| good	0.395 \| good	5.463 \| good	0.253 \| good
2025-07-21T04:00:00.000Z	44 \| good	7.661 \| good	23.422 \| good	29.891 \| good	0.328 \| good	3.247 \| good	0.253 \| good
2025-07-21T05:00:00.000Z	96 \| moderate	32.895 \| fine	139.418 \| fine	31.9 \| good	0.417 \| good	2.164 \| good	0.266 \| good
2025-07-21T06:00:00.000Z	84 \| moderate	27.263 \| fine	95.108 \| fine	31.766 \| good	0.467 \| good	2.81 \| good	0.243 \| good
2025-07-21T07:00:00.000Z	105 \| sensitive	36.972 \| moderate	142.615 \| fine	31.809 \| good	0.567 \| good	3.039 \| good	0.231 \| good
2025-07-21T08:00:00.000Z	88 \| moderate	28.717 \| fine	81.344 \| fine	27.528 \| good	0.415 \| good	3.192 \| good	0.207 \| good
2025-07-21T09:00:00.000Z	97 \| moderate	34.328 \| fine	143.636 \| fine	18.535 \| good	0.38 \| good	3.834 \| good	0.209 \| good
2025-07-21T10:00:00.000Z	117 \| sensitive	42.143 \| moderate	166.816 \| moderate	25.282 \| good	0.443 \| good	7.493 \| good	0.209 \| good
2025-07-21T11:00:00.000Z	127 \| sensitive	45.582 \| moderate	154.22 \| fine	20.979 \| good	0.713 \| good	5.271 \| good	0.174 \| good
2025-07-21T12:00:00.000Z	122 \| sensitive	44.273 \| moderate	178.881 \| moderate	16.13 \| good	0.947 \| good	6.211 \| good	0.174 \| good
2025-07-21T13:00:00.000Z	90 \| moderate	30.244 \| fine	108.164 \| fine	17.788 \| good	1.015 \| good	6.549 \| good	0.177 \| good
2025-07-21T14:00:00.000Z	84 \| moderate	26.731 \| fine	95.021 \| fine	21.624 \| good	0.863 \| good	4.183 \| good	0.155 \| good
2025-07-21T15:00:00.000Z	73 \| moderate	21.44 \| fine	73.098 \| fine	27.856 \| good	2.433 \| good	3.72 \| good	0.155 \| good
2025-07-21T16:00:00.000Z	71 \| moderate	20.139 \| fine	78.187 \| fine	26.038 \| good	2.521 \| good	2.198 \| good	0.14 \| good
2025-07-21T17:00:00.000Z	67 \| moderate	18.349 \| fine	58.081 \| fine	33.543 \| good	1.205 \| good	1.582 \| good	0.14 \| good
2025-07-21T18:00:00.000Z	82 \| moderate	26.029 \| fine	110.351 \| fine	42.016 \| good	1.05 \| good	1.796 \| good	0.164 \| good
2025-07-21T19:00:00.000Z	96 \| moderate	33.218 \| fine	134.863 \| fine	44.141 \| good	1.358 \| good	1.94 \| good	0.203 \| good
2025-07-21T20:00:00.000Z	82 \| moderate	26.299 \| fine	95.286 \| fine	46.654 \| good	0.898 \| good	1.474 \| good	0.192 \| good
2025-07-21T21:00:00.000Z	77 \| moderate	23.031 \| fine	92.056 \| fine	49.208 \| good	1.934 \| good	1.581 \| good	0.206 \| good
2025-07-21T22:00:00.000Z	69 \| moderate	18.956 \| fine	80.494 \| fine	54.052 \| good	2.017 \| good	1.727 \| good	0.238 \| good
2025-07-21T23:00:00.000Z	77 \| moderate	22.514 \| fine	100.095 \| fine	44.022 \| good	1.249 \| good	1.225 \| good	0.251 \| good
2025-07-22T00:00:00.000Z	75 \| moderate	22.105 \| fine	99.942 \| fine	56.781 \| fine	1.151 \| good	2.219 \| good	0.273 \| good
2025-07-22T01:00:00.000Z	79 \| moderate	24.345 \| fine	110.578 \| fine	49.693 \| good	1.655 \| good	3.185 \| good	0.293 \| good
2025-07-22T02:00:00.000Z	80 \| moderate	22.314 \| fine	114.281 \| fine	45.234 \| good	1.376 \| good	7.97 \| good	0.283 \| good
2025-07-22T03:00:00.000Z	71 \| moderate	19.676 \| fine	86.322 \| fine	20.588 \| good	1.913 \| good	10.215 \| good	0.303 \| good
2025-07-22T04:00:00.000Z	87 \| moderate	27.074 \| fine	126.611 \| fine	35.911 \| good	0.46 \| good	7.723 \| good	0.204 \| good
2025-07-22T05:00:00.000Z	77 \| moderate	22.731 \| fine	103.152 \| fine	28.705 \| good	0.552 \| good	8.214 \| good	0.159 \| good
2025-07-22T06:00:00.000Z	84 \| moderate	27.041 \| fine	88.701 \| fine	26.236 \| good	0.805 \| good	10.493 \| good	0.156 \| good
2025-07-22T07:00:00.000Z	90 \| moderate	30.263 \| fine	131.435 \| fine	24.654 \| good	0.661 \| good	10.102 \| good	0.128 \| good
2025-07-22T08:00:00.000Z	97 \| moderate	32.205 \| fine	147.876 \| fine	23.402 \| good	0.468 \| good	12.529 \| good	0.128 \| good
2025-07-22T09:00:00.000Z	82 \| moderate	25.733 \| fine	94.204 \| fine	18.117 \| good	0.272 \| good	10.796 \| good	0.115 \| good
2025-07-22T10:00:00.000Z	79 \| moderate	23.742 \| fine	67.145 \| fine	25.094 \| good	0.32 \| good	10.672 \| good	0.128 \| good
2025-07-22T11:00:00.000Z	71 \| moderate	19.893 \| fine	68.504 \| fine	18.736 \| good	0.52 \| good	8.913 \| good	0.178 \| good
2025-07-22T12:00:00.000Z	79 \| moderate	23.922 \| fine	85.97 \| fine	16.769 \| good	0.518 \| good	8.999 \| good	0.178 \| good
2025-07-22T13:00:00.000Z	87 \| moderate	28.278 \| fine	127.235 \| fine	15.886 \| good	0.331 \| good	6.93 \| good	0.178 \| good
2025-07-22T14:00:00.000Z	96 \| moderate	32.27 \| fine	144.821 \| fine	23.638 \| good	0.703 \| good	4.246 \| good	0.188 \| good
2025-07-22T15:00:00.000Z	92 \| moderate	30.927 \| fine	116.894 \| fine	25.14 \| good	0.825 \| good	5.015 \| good	0.223 \| good
2025-07-22T16:00:00.000Z	92 \| moderate	31.204 \| fine	125.453 \| fine	33.662 \| good	1.177 \| good	3.641 \| good	0.21 \| good
2025-07-22T17:00:00.000Z	92 \| moderate	31.453 \| fine	130.179 \| fine	40.06 \| good	1.064 \| good	2.165 \| good	0.21 \| good
2025-07-22T17:00:00.000Z	92 \| moderate	31.453 \| fine	130.179 \| fine	40.06 \| good	1.064 \| good	2.165 \| good	0.21 \| good
2025-07-21T17:00:00.000Z	66 \| moderate	17.081 \| fine	75.318 \| fine	50.593 \| good	1.569 \| good	2.124 \| good	0.264 \| good
2025-07-21T18:00:00.000Z	67 \| moderate	18.181 \| fine	80.912 \| fine	55.333 \| fine	1.607 \| good	1.544 \| good	0.257 \| good
2025-07-21T19:00:00.000Z	69 \| moderate	18.682 \| fine	82.995 \| fine	58.912 \| fine	1.605 \| good	1.576 \| good	0.257 \| good
2025-07-21T20:00:00.000Z	67 \| moderate	18.333 \| fine	81.214 \| fine	60.051 \| fine	1.603 \| good	1.608 \| good	0.257 \| good
2025-07-21T21:00:00.000Z	71 \| moderate	18.738 \| fine	83.046 \| fine	60.929 \| fine	1.601 \| good	1.64 \| good	0.256 \| good
2025-07-21T22:00:00.000Z	77 \| moderate	23.441 \| fine	102.714 \| fine	50.799 \| good	1.604 \| good	2.723 \| good	0.265 \| good
2025-07-21T23:00:00.000Z	82 \| moderate	26.487 \| fine	114.924 \| fine	42.613 \| good	1.606 \| good	3.806 \| good	0.273 \| good
2025-07-22T00:00:00.000Z	79 \| moderate	23.998 \| fine	105.019 \| fine	39.797 \| good	1.608 \| good	4.889 \| good	0.281 \| good
2025-07-22T01:00:00.000Z	71 \| moderate	19.553 \| fine	86.379 \| fine	34.563 \| good	1.664 \| good	6.477 \| good	0.287 \| good
2025-07-22T02:00:00.000Z	58 \| moderate	13.474 \| fine	60.64 \| fine	30.073 \| good	1.72 \| good	8.064 \| good	0.293 \| good
2025-07-22T03:00:00.000Z	49 \| good	9.494 \| good	42.384 \| good	23.491 \| good	1.775 \| good	9.652 \| good	0.299 \| good
2025-07-22T04:00:00.000Z	44 \| good	8.054 \| good	35.54 \| good	20.277 \| good	1.81 \| good	9.863 \| good	0.296 \| good
2025-07-22T05:00:00.000Z	38 \| good	7.348 \| good	32.56 \| good	17.076 \| good	1.844 \| good	10.073 \| good	0.293 \| good
2025-07-22T06:00:00.000Z	49 \| good	9.25 \| good	41.014 \| good	16.021 \| good	1.878 \| good	10.283 \| good	0.29 \| good
2025-07-22T07:00:00.000Z	54 \| moderate	11.022 \| good	48.343 \| good	15.419 \| good	1.965 \| good	10.193 \| good	0.292 \| good
2025-07-22T08:00:00.000Z	58 \| moderate	12.696 \| fine	57.001 \| fine	11.273 \| good	2.052 \| good	10.103 \| good	0.293 \| good
2025-07-22T09:00:00.000Z	64 \| moderate	15.537 \| fine	69.066 \| fine	8.042 \| good	2.139 \| good	10.014 \| good	0.295 \| good
2025-07-22T10:00:00.000Z	69 \| moderate	18.835 \| fine	83.474 \| fine	8.322 \| good	2.13 \| good	9.451 \| good	0.297 \| good
2025-07-22T11:00:00.000Z	77 \| moderate	22.86 \| fine	99.684 \| fine	10.793 \| good	2.121 \| good	8.889 \| good	0.299 \| good
2025-07-22T12:00:00.000Z	81 \| moderate	24.982 \| fine	108.973 \| fine	15.334 \| good	2.111 \| good	8.327 \| good	0.301 \| good
2025-07-22T13:00:00.000Z	79 \| moderate	23.944 \| fine	104.546 \| fine	21.125 \| good	2.144 \| good	7.436 \| good	0.303 \| good
2025-07-22T14:00:00.000Z	69 \| moderate	19.157 \| fine	84.778 \| fine	28.342 \| good	2.178 \| good	6.544 \| good	0.305 \| good
2025-07-22T15:00:00.000Z	67 \| moderate	18.004 \| fine	79.412 \| fine	34.954 \| good	2.211 \| good	5.653 \| good	0.307 \| good
2025-07-22T16:00:00.000Z	64 \| moderate	15.971 \| fine	70.868 \| fine	42.423 \| good	2.219 \| good	4.355 \| good	0.284 \| good
2025-07-22T17:00:00.000Z	64 \| moderate	15.543 \| fine	68.868 \| fine	46.599 \| good	2.227 \| good	3.057 \| good	0.262 \| good
2025-07-22T18:00:00.000Z	62 \| moderate	15.143 \| fine	67.357 \| fine	49.098 \| good	2.235 \| good	1.76 \| good	0.239 \| good
2025-07-22T19:00:00.000Z	60 \| moderate	14.116 \| fine	63.024 \| fine	48.079 \| good	2.113 \| good	1.849 \| good	0.232 \| good
2025-07-22T20:00:00.000Z	58 \| moderate	13.405 \| fine	60.604 \| fine	49.284 \| good	1.991 \| good	1.938 \| good	0.226 \| good
2025-07-22T21:00:00.000Z	60 \| moderate	13.76 \| fine	61.225 \| fine	47.688 \| good	1.869 \| good	2.027 \| good	0.219 \| good
2025-07-22T22:00:00.000Z	62 \| moderate	14.862 \| fine	66.7 \| fine	45.038 \| good	1.776 \| good	2.805 \| good	0.221 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	16.291 \| fine	72.635 \| fine	39.837 \| good	1.684 \| good	3.583 \| good	0.222 \| good
2025-07-23T00:00:00.000Z	64 \| moderate	15.641 \| fine	69.031 \| fine	35.849 \| good	1.592 \| good	4.361 \| good	0.223 \| good
2025-07-23T01:00:00.000Z	60 \| moderate	13.598 \| fine	60.967 \| fine	30.889 \| good	1.689 \| good	5.803 \| good	0.231 \| good
2025-07-23T02:00:00.000Z	58 \| moderate	13.081 \| fine	58.823 \| fine	27.76 \| good	1.786 \| good	7.246 \| good	0.239 \| good
2025-07-23T03:00:00.000Z	60 \| moderate	14.22 \| fine	63.161 \| fine	24.767 \| good	1.883 \| good	8.689 \| good	0.247 \| good
2025-07-23T04:00:00.000Z	60 \| moderate	14.104 \| fine	63.089 \| fine	23.883 \| good	1.807 \| good	8.22 \| good	0.245 \| good
2025-07-23T05:00:00.000Z	60 \| moderate	13.845 \| fine	62.385 \| fine	22.14 \| good	1.732 \| good	7.752 \| good	0.243 \| good
2025-07-23T06:00:00.000Z	58 \| moderate	13.018 \| fine	58.543 \| fine	19.846 \| good	1.656 \| good	7.284 \| good	0.241 \| good
2025-07-23T07:00:00.000Z	56 \| moderate	12.352 \| fine	55.762 \| fine	19.496 \| good	1.535 \| good	6.709 \| good	0.236 \| good
2025-07-23T08:00:00.000Z	56 \| moderate	11.821 \| good	52.162 \| good	18.894 \| good	1.414 \| good	6.134 \| good	0.232 \| good
2025-07-23T09:00:00.000Z	58 \| moderate	13.301 \| fine	59.306 \| fine	16.867 \| good	1.293 \| good	5.558 \| good	0.227 \| good
2025-07-23T10:00:00.000Z	64 \| moderate	16.043 \| fine	71.144 \| fine	17.331 \| good	1.303 \| good	5.263 \| good	0.226 \| good
2025-07-23T11:00:00.000Z	64 \| moderate	15.693 \| fine	69.412 \| fine	16.128 \| good	1.313 \| good	4.968 \| good	0.226 \| good
2025-07-23T12:00:00.000Z	62 \| moderate	15.463 \| fine	69.05 \| fine	18.793 \| good	1.323 \| good	4.672 \| good	0.225 \| good
2025-07-23T13:00:00.000Z	62 \| moderate	14.523 \| fine	65.209 \| fine	27.395 \| good	1.962 \| good	4.119 \| good	0.228 \| good
2025-07-23T14:00:00.000Z	60 \| moderate	14.368 \| fine	64.613 \| fine	35.338 \| good	2.601 \| good	3.565 \| good	0.23 \| good
2025-07-23T15:00:00.000Z	58 \| moderate	13.285 \| fine	59.179 \| fine	38.144 \| good	3.241 \| good	3.012 \| good	0.232 \| good
2025-07-23T16:00:00.000Z	60 \| moderate	14.312 \| fine	63.525 \| fine	41.732 \| good	3.09 \| good	2.462 \| good	0.224 \| good

St. Charles

Get reliable air quality data to drive your business

St. Charles, Illinois air quality map: Stay updated on AQI near you

0.16ppm

How accurate is Illinois, USA air quality data?

Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for St. Charles, Illinois?

The air quality information for St. Charles, Illinois is updated every hour for accuracy.

What time in the last 24 hours was the air quality in St. Charles, Illinois at its worst?

In the past 24 hours, the air quality in St. Charles, Illinois was at its worst at 11:00:00 on 2025-07-21.

When did St. Charles, Illinois experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in St. Charles, Illinois was observed at 04:00:00 on 2025-07-20.

What is the AQI in St. Charles, Illinois right now?

As of now, the AQI in St. Charles, Illinois is 73, indicating Moderate conditions.

What is the most common type of pollution in St. Charles, Illinois?

St. Charles, Illinois air has the highest levels of PM2.5.

What should I do in case of poor air quality in St. Charles, Illinois?

Poor air quality in St. Charles, Illinois means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in St. Charles, Illinois at the moment?

PM_2.5 levels in St. Charles, Illinois are currently 21.44 μg/m³.

What is the PM₁₀ level in St. Charles, Illinois at the moment?

The PM₁₀ concentration in St. Charles, Illinois is 73.098 μg/m³ at the moment.

What is the carbon monoxide (CO) level in St. Charles, Illinois at the moment?

The current carbon monoxide (CO) concentration in St. Charles, Illinois is 0.155 ppm.

What is the sulfur dioxide (SO₂) level in St. Charles, Illinois at the moment?

Currently, St. Charles, Illinois has a sulfur dioxide (SO₂) concentration of 2.433 ppb.

What is the ozone (O₃) level in St. Charles, Illinois at the moment?

The current ozone (O₃) level in St. Charles, Illinois at the moment is 27.856 ppm.

What is the nitrogen dioxide (NO₂) level in St. Charles, Illinois at the moment?

Nitrogen dioxide (NO₂) level in St. Charles, Illinois at the moment is 3.72 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-20T18:00:00.000Z	32 \| good	4.726 \| good	20.86 \| good	34.687 \| good	0.378 \| good	1.543 \| good	0.216 \| good
2025-07-20T19:00:00.000Z	30 \| good	5.136 \| good	17.007 \| good	31.932 \| good	0.41 \| good	1.788 \| good	0.216 \| good
2025-07-20T20:00:00.000Z	34 \| good	5.95 \| good	33.594 \| good	36.981 \| good	0.453 \| good	1.442 \| good	0.19 \| good
2025-07-20T21:00:00.000Z	33 \| good	6.209 \| good	25.003 \| good	35.46 \| good	0.51 \| good	1.404 \| good	0.19 \| good
2025-07-20T22:00:00.000Z	33 \| good	5.971 \| good	25.995 \| good	35.473 \| good	0.409 \| good	1.221 \| good	0.135 \| good
2025-07-20T23:00:00.000Z	33 \| good	6.268 \| good	27.57 \| good	35.865 \| good	0.396 \| good	3.446 \| good	0.172 \| good
2025-07-21T00:00:00.000Z	33 \| good	5.875 \| good	27.58 \| good	35.732 \| good	0.378 \| good	3.37 \| good	0.229 \| good
2025-07-21T01:00:00.000Z	33 \| good	6.126 \| good	27.515 \| good	36.174 \| good	0.415 \| good	4.096 \| good	0.241 \| good
2025-07-21T02:00:00.000Z	30 \| good	5.226 \| good	20.996 \| good	31.926 \| good	0.453 \| good	8.684 \| good	0.241 \| good
2025-07-21T03:00:00.000Z	33 \| good	5.993 \| good	20.241 \| good	35.128 \| good	0.395 \| good	5.463 \| good	0.253 \| good
2025-07-21T04:00:00.000Z	44 \| good	7.661 \| good	23.422 \| good	29.891 \| good	0.328 \| good	3.247 \| good	0.253 \| good
2025-07-21T05:00:00.000Z	96 \| moderate	32.895 \| fine	139.418 \| fine	31.9 \| good	0.417 \| good	2.164 \| good	0.266 \| good
2025-07-21T06:00:00.000Z	84 \| moderate	27.263 \| fine	95.108 \| fine	31.766 \| good	0.467 \| good	2.81 \| good	0.243 \| good
2025-07-21T07:00:00.000Z	105 \| sensitive	36.972 \| moderate	142.615 \| fine	31.809 \| good	0.567 \| good	3.039 \| good	0.231 \| good
2025-07-21T08:00:00.000Z	88 \| moderate	28.717 \| fine	81.344 \| fine	27.528 \| good	0.415 \| good	3.192 \| good	0.207 \| good
2025-07-21T09:00:00.000Z	97 \| moderate	34.328 \| fine	143.636 \| fine	18.535 \| good	0.38 \| good	3.834 \| good	0.209 \| good
2025-07-21T10:00:00.000Z	117 \| sensitive	42.143 \| moderate	166.816 \| moderate	25.282 \| good	0.443 \| good	7.493 \| good	0.209 \| good
2025-07-21T11:00:00.000Z	127 \| sensitive	45.582 \| moderate	154.22 \| fine	20.979 \| good	0.713 \| good	5.271 \| good	0.174 \| good
2025-07-21T12:00:00.000Z	122 \| sensitive	44.273 \| moderate	178.881 \| moderate	16.13 \| good	0.947 \| good	6.211 \| good	0.174 \| good
2025-07-21T13:00:00.000Z	90 \| moderate	30.244 \| fine	108.164 \| fine	17.788 \| good	1.015 \| good	6.549 \| good	0.177 \| good
2025-07-21T14:00:00.000Z	84 \| moderate	26.731 \| fine	95.021 \| fine	21.624 \| good	0.863 \| good	4.183 \| good	0.155 \| good
2025-07-21T15:00:00.000Z	73 \| moderate	21.44 \| fine	73.098 \| fine	27.856 \| good	2.433 \| good	3.72 \| good	0.155 \| good
2025-07-21T16:00:00.000Z	71 \| moderate	20.139 \| fine	78.187 \| fine	26.038 \| good	2.521 \| good	2.198 \| good	0.14 \| good
2025-07-21T17:00:00.000Z	67 \| moderate	18.349 \| fine	58.081 \| fine	33.543 \| good	1.205 \| good	1.582 \| good	0.14 \| good
2025-07-21T18:00:00.000Z	82 \| moderate	26.029 \| fine	110.351 \| fine	42.016 \| good	1.05 \| good	1.796 \| good	0.164 \| good
2025-07-21T19:00:00.000Z	96 \| moderate	33.218 \| fine	134.863 \| fine	44.141 \| good	1.358 \| good	1.94 \| good	0.203 \| good
2025-07-21T20:00:00.000Z	82 \| moderate	26.299 \| fine	95.286 \| fine	46.654 \| good	0.898 \| good	1.474 \| good	0.192 \| good
2025-07-21T21:00:00.000Z	77 \| moderate	23.031 \| fine	92.056 \| fine	49.208 \| good	1.934 \| good	1.581 \| good	0.206 \| good
2025-07-21T22:00:00.000Z	69 \| moderate	18.956 \| fine	80.494 \| fine	54.052 \| good	2.017 \| good	1.727 \| good	0.238 \| good
2025-07-21T23:00:00.000Z	77 \| moderate	22.514 \| fine	100.095 \| fine	44.022 \| good	1.249 \| good	1.225 \| good	0.251 \| good
2025-07-22T00:00:00.000Z	75 \| moderate	22.105 \| fine	99.942 \| fine	56.781 \| fine	1.151 \| good	2.219 \| good	0.273 \| good
2025-07-22T01:00:00.000Z	79 \| moderate	24.345 \| fine	110.578 \| fine	49.693 \| good	1.655 \| good	3.185 \| good	0.293 \| good
2025-07-22T02:00:00.000Z	80 \| moderate	22.314 \| fine	114.281 \| fine	45.234 \| good	1.376 \| good	7.97 \| good	0.283 \| good
2025-07-22T03:00:00.000Z	71 \| moderate	19.676 \| fine	86.322 \| fine	20.588 \| good	1.913 \| good	10.215 \| good	0.303 \| good
2025-07-22T04:00:00.000Z	87 \| moderate	27.074 \| fine	126.611 \| fine	35.911 \| good	0.46 \| good	7.723 \| good	0.204 \| good
2025-07-22T05:00:00.000Z	77 \| moderate	22.731 \| fine	103.152 \| fine	28.705 \| good	0.552 \| good	8.214 \| good	0.159 \| good
2025-07-22T06:00:00.000Z	84 \| moderate	27.041 \| fine	88.701 \| fine	26.236 \| good	0.805 \| good	10.493 \| good	0.156 \| good
2025-07-22T07:00:00.000Z	90 \| moderate	30.263 \| fine	131.435 \| fine	24.654 \| good	0.661 \| good	10.102 \| good	0.128 \| good
2025-07-22T08:00:00.000Z	97 \| moderate	32.205 \| fine	147.876 \| fine	23.402 \| good	0.468 \| good	12.529 \| good	0.128 \| good
2025-07-22T09:00:00.000Z	82 \| moderate	25.733 \| fine	94.204 \| fine	18.117 \| good	0.272 \| good	10.796 \| good	0.115 \| good
2025-07-22T10:00:00.000Z	79 \| moderate	23.742 \| fine	67.145 \| fine	25.094 \| good	0.32 \| good	10.672 \| good	0.128 \| good
2025-07-22T11:00:00.000Z	71 \| moderate	19.893 \| fine	68.504 \| fine	18.736 \| good	0.52 \| good	8.913 \| good	0.178 \| good
2025-07-22T12:00:00.000Z	79 \| moderate	23.922 \| fine	85.97 \| fine	16.769 \| good	0.518 \| good	8.999 \| good	0.178 \| good
2025-07-22T13:00:00.000Z	87 \| moderate	28.278 \| fine	127.235 \| fine	15.886 \| good	0.331 \| good	6.93 \| good	0.178 \| good
2025-07-22T14:00:00.000Z	96 \| moderate	32.27 \| fine	144.821 \| fine	23.638 \| good	0.703 \| good	4.246 \| good	0.188 \| good
2025-07-22T15:00:00.000Z	92 \| moderate	30.927 \| fine	116.894 \| fine	25.14 \| good	0.825 \| good	5.015 \| good	0.223 \| good
2025-07-22T16:00:00.000Z	92 \| moderate	31.204 \| fine	125.453 \| fine	33.662 \| good	1.177 \| good	3.641 \| good	0.21 \| good
2025-07-22T17:00:00.000Z	92 \| moderate	31.453 \| fine	130.179 \| fine	40.06 \| good	1.064 \| good	2.165 \| good	0.21 \| good
2025-07-22T17:00:00.000Z	92 \| moderate	31.453 \| fine	130.179 \| fine	40.06 \| good	1.064 \| good	2.165 \| good	0.21 \| good
2025-07-21T17:00:00.000Z	66 \| moderate	17.081 \| fine	75.318 \| fine	50.593 \| good	1.569 \| good	2.124 \| good	0.264 \| good
2025-07-21T18:00:00.000Z	67 \| moderate	18.181 \| fine	80.912 \| fine	55.333 \| fine	1.607 \| good	1.544 \| good	0.257 \| good
2025-07-21T19:00:00.000Z	69 \| moderate	18.682 \| fine	82.995 \| fine	58.912 \| fine	1.605 \| good	1.576 \| good	0.257 \| good
2025-07-21T20:00:00.000Z	67 \| moderate	18.333 \| fine	81.214 \| fine	60.051 \| fine	1.603 \| good	1.608 \| good	0.257 \| good
2025-07-21T21:00:00.000Z	71 \| moderate	18.738 \| fine	83.046 \| fine	60.929 \| fine	1.601 \| good	1.64 \| good	0.256 \| good
2025-07-21T22:00:00.000Z	77 \| moderate	23.441 \| fine	102.714 \| fine	50.799 \| good	1.604 \| good	2.723 \| good	0.265 \| good
2025-07-21T23:00:00.000Z	82 \| moderate	26.487 \| fine	114.924 \| fine	42.613 \| good	1.606 \| good	3.806 \| good	0.273 \| good
2025-07-22T00:00:00.000Z	79 \| moderate	23.998 \| fine	105.019 \| fine	39.797 \| good	1.608 \| good	4.889 \| good	0.281 \| good
2025-07-22T01:00:00.000Z	71 \| moderate	19.553 \| fine	86.379 \| fine	34.563 \| good	1.664 \| good	6.477 \| good	0.287 \| good
2025-07-22T02:00:00.000Z	58 \| moderate	13.474 \| fine	60.64 \| fine	30.073 \| good	1.72 \| good	8.064 \| good	0.293 \| good
2025-07-22T03:00:00.000Z	49 \| good	9.494 \| good	42.384 \| good	23.491 \| good	1.775 \| good	9.652 \| good	0.299 \| good
2025-07-22T04:00:00.000Z	44 \| good	8.054 \| good	35.54 \| good	20.277 \| good	1.81 \| good	9.863 \| good	0.296 \| good
2025-07-22T05:00:00.000Z	38 \| good	7.348 \| good	32.56 \| good	17.076 \| good	1.844 \| good	10.073 \| good	0.293 \| good
2025-07-22T06:00:00.000Z	49 \| good	9.25 \| good	41.014 \| good	16.021 \| good	1.878 \| good	10.283 \| good	0.29 \| good
2025-07-22T07:00:00.000Z	54 \| moderate	11.022 \| good	48.343 \| good	15.419 \| good	1.965 \| good	10.193 \| good	0.292 \| good
2025-07-22T08:00:00.000Z	58 \| moderate	12.696 \| fine	57.001 \| fine	11.273 \| good	2.052 \| good	10.103 \| good	0.293 \| good
2025-07-22T09:00:00.000Z	64 \| moderate	15.537 \| fine	69.066 \| fine	8.042 \| good	2.139 \| good	10.014 \| good	0.295 \| good
2025-07-22T10:00:00.000Z	69 \| moderate	18.835 \| fine	83.474 \| fine	8.322 \| good	2.13 \| good	9.451 \| good	0.297 \| good
2025-07-22T11:00:00.000Z	77 \| moderate	22.86 \| fine	99.684 \| fine	10.793 \| good	2.121 \| good	8.889 \| good	0.299 \| good
2025-07-22T12:00:00.000Z	81 \| moderate	24.982 \| fine	108.973 \| fine	15.334 \| good	2.111 \| good	8.327 \| good	0.301 \| good
2025-07-22T13:00:00.000Z	79 \| moderate	23.944 \| fine	104.546 \| fine	21.125 \| good	2.144 \| good	7.436 \| good	0.303 \| good
2025-07-22T14:00:00.000Z	69 \| moderate	19.157 \| fine	84.778 \| fine	28.342 \| good	2.178 \| good	6.544 \| good	0.305 \| good
2025-07-22T15:00:00.000Z	67 \| moderate	18.004 \| fine	79.412 \| fine	34.954 \| good	2.211 \| good	5.653 \| good	0.307 \| good
2025-07-22T16:00:00.000Z	64 \| moderate	15.971 \| fine	70.868 \| fine	42.423 \| good	2.219 \| good	4.355 \| good	0.284 \| good
2025-07-22T17:00:00.000Z	64 \| moderate	15.543 \| fine	68.868 \| fine	46.599 \| good	2.227 \| good	3.057 \| good	0.262 \| good
2025-07-22T18:00:00.000Z	62 \| moderate	15.143 \| fine	67.357 \| fine	49.098 \| good	2.235 \| good	1.76 \| good	0.239 \| good
2025-07-22T19:00:00.000Z	60 \| moderate	14.116 \| fine	63.024 \| fine	48.079 \| good	2.113 \| good	1.849 \| good	0.232 \| good
2025-07-22T20:00:00.000Z	58 \| moderate	13.405 \| fine	60.604 \| fine	49.284 \| good	1.991 \| good	1.938 \| good	0.226 \| good
2025-07-22T21:00:00.000Z	60 \| moderate	13.76 \| fine	61.225 \| fine	47.688 \| good	1.869 \| good	2.027 \| good	0.219 \| good
2025-07-22T22:00:00.000Z	62 \| moderate	14.862 \| fine	66.7 \| fine	45.038 \| good	1.776 \| good	2.805 \| good	0.221 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	16.291 \| fine	72.635 \| fine	39.837 \| good	1.684 \| good	3.583 \| good	0.222 \| good
2025-07-23T00:00:00.000Z	64 \| moderate	15.641 \| fine	69.031 \| fine	35.849 \| good	1.592 \| good	4.361 \| good	0.223 \| good
2025-07-23T01:00:00.000Z	60 \| moderate	13.598 \| fine	60.967 \| fine	30.889 \| good	1.689 \| good	5.803 \| good	0.231 \| good
2025-07-23T02:00:00.000Z	58 \| moderate	13.081 \| fine	58.823 \| fine	27.76 \| good	1.786 \| good	7.246 \| good	0.239 \| good
2025-07-23T03:00:00.000Z	60 \| moderate	14.22 \| fine	63.161 \| fine	24.767 \| good	1.883 \| good	8.689 \| good	0.247 \| good
2025-07-23T04:00:00.000Z	60 \| moderate	14.104 \| fine	63.089 \| fine	23.883 \| good	1.807 \| good	8.22 \| good	0.245 \| good
2025-07-23T05:00:00.000Z	60 \| moderate	13.845 \| fine	62.385 \| fine	22.14 \| good	1.732 \| good	7.752 \| good	0.243 \| good
2025-07-23T06:00:00.000Z	58 \| moderate	13.018 \| fine	58.543 \| fine	19.846 \| good	1.656 \| good	7.284 \| good	0.241 \| good
2025-07-23T07:00:00.000Z	56 \| moderate	12.352 \| fine	55.762 \| fine	19.496 \| good	1.535 \| good	6.709 \| good	0.236 \| good
2025-07-23T08:00:00.000Z	56 \| moderate	11.821 \| good	52.162 \| good	18.894 \| good	1.414 \| good	6.134 \| good	0.232 \| good
2025-07-23T09:00:00.000Z	58 \| moderate	13.301 \| fine	59.306 \| fine	16.867 \| good	1.293 \| good	5.558 \| good	0.227 \| good
2025-07-23T10:00:00.000Z	64 \| moderate	16.043 \| fine	71.144 \| fine	17.331 \| good	1.303 \| good	5.263 \| good	0.226 \| good
2025-07-23T11:00:00.000Z	64 \| moderate	15.693 \| fine	69.412 \| fine	16.128 \| good	1.313 \| good	4.968 \| good	0.226 \| good
2025-07-23T12:00:00.000Z	62 \| moderate	15.463 \| fine	69.05 \| fine	18.793 \| good	1.323 \| good	4.672 \| good	0.225 \| good
2025-07-23T13:00:00.000Z	62 \| moderate	14.523 \| fine	65.209 \| fine	27.395 \| good	1.962 \| good	4.119 \| good	0.228 \| good
2025-07-23T14:00:00.000Z	60 \| moderate	14.368 \| fine	64.613 \| fine	35.338 \| good	2.601 \| good	3.565 \| good	0.23 \| good
2025-07-23T15:00:00.000Z	58 \| moderate	13.285 \| fine	59.179 \| fine	38.144 \| good	3.241 \| good	3.012 \| good	0.232 \| good
2025-07-23T16:00:00.000Z	60 \| moderate	14.312 \| fine	63.525 \| fine	41.732 \| good	3.09 \| good	2.462 \| good	0.224 \| good

Live air quality index in St. Charles, Illinois today

Major air pollutants in St. Charles, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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St. Charles, Illinois air quality map: Stay updated on AQI near you

Air quality in nearby cities

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What is the nitrogen dioxide (NO2) level in St. Charles, Illinois at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in St. Charles, Illinois at the moment?

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What is the sulfur dioxide (SO₂) level in St. Charles, Illinois at the moment?

What is the ozone (O₃) level in St. Charles, Illinois at the moment?

What is the nitrogen dioxide (NO₂) level in St. Charles, Illinois at the moment?