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

The PM10 concentration in St. Charles, Illinois is 14.635 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 0.276 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 36.59 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 4.247 ppb.

Live air quality index in St. Charles, Illinois today

Q: What is the PM2.5 level in St. Charles, Illinois at the moment?

PM2.5 levels in St. Charles, Illinois are currently 3.619 μg/m3.

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)

Good

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)

3.62 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.63 μg/m³

155

255

425

605+

Ozone (O₃)

36.59 ppb

201

201+

Sulfur Dioxide (SO₂)

0.28 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.25 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.17 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
2026-08-14T11:00:00.000Z	71 \| moderate	19.989 \| fine	93.126 \| fine	31.833 \| good	0.335 \| good	3.422 \| good	0.214 \| good
2026-08-14T12:00:00.000Z	67 \| moderate	18.06 \| fine	63.69 \| fine	33.509 \| good	0.179 \| good	5.514 \| good	0.227 \| good
2026-08-14T13:00:00.000Z	69 \| moderate	18.931 \| fine	53.883 \| good	37.597 \| good	0.203 \| good	6.331 \| good	0.251 \| good
2026-08-14T14:00:00.000Z	66 \| moderate	16.514 \| fine	72.974 \| fine	33.908 \| good	0.259 \| good	5.245 \| good	0.24 \| good
2026-08-14T15:00:00.000Z	67 \| moderate	17.595 \| fine	79.144 \| fine	37.746 \| good	0.572 \| good	3.922 \| good	0.227 \| good
2026-08-14T16:00:00.000Z	62 \| moderate	15.477 \| fine	59.863 \| fine	31.48 \| good	0.253 \| good	3.595 \| good	0.23 \| good
2026-08-14T17:00:00.000Z	58 \| moderate	13.086 \| fine	64.058 \| fine	32.591 \| good	0.252 \| good	3.338 \| good	0.23 \| good
2026-08-14T18:00:00.000Z	62 \| moderate	15.25 \| fine	64.559 \| fine	35.078 \| good	0.269 \| good	2.962 \| good	0.2 \| good
2026-08-14T19:00:00.000Z	66 \| moderate	17.165 \| fine	79.107 \| fine	39.15 \| good	0.372 \| good	2.633 \| good	0.214 \| good
2026-08-14T20:00:00.000Z	66 \| moderate	17.203 \| fine	63.818 \| fine	41.046 \| good	0.307 \| good	2.095 \| good	0.214 \| good
2026-08-14T21:00:00.000Z	66 \| moderate	17.038 \| fine	79.26 \| fine	45.507 \| good	0.301 \| good	2.567 \| good	0.214 \| good
2026-08-14T22:00:00.000Z	67 \| moderate	17.654 \| fine	82.37 \| fine	45.502 \| good	0.321 \| good	2.853 \| good	0.249 \| good
2026-08-14T23:00:00.000Z	64 \| moderate	16.045 \| fine	73.444 \| fine	45.797 \| good	0.394 \| good	3.182 \| good	0.235 \| good
2026-08-15T00:00:00.000Z	69 \| moderate	18.96 \| fine	69.986 \| fine	43.581 \| good	0.513 \| good	3.052 \| good	0.235 \| good
2026-08-15T01:00:00.000Z	69 \| moderate	19.326 \| fine	77.306 \| fine	43.433 \| good	0.681 \| good	3.039 \| good	0.272 \| good
2026-08-15T02:00:00.000Z	62 \| moderate	15.26 \| fine	42.541 \| good	32.626 \| good	0.586 \| good	3.423 \| good	0.25 \| good
2026-08-15T03:00:00.000Z	62 \| moderate	15.154 \| fine	46.833 \| good	36.407 \| good	0.445 \| good	4.658 \| good	0.194 \| good
2026-08-15T04:00:00.000Z	60 \| moderate	14.106 \| fine	68.81 \| fine	35.325 \| good	0.585 \| good	8.759 \| good	0.199 \| good
2026-08-15T05:00:00.000Z	62 \| moderate	15.499 \| fine	70.391 \| fine	33.514 \| good	0.354 \| good	10.066 \| good	0.186 \| good
2026-08-15T06:00:00.000Z	58 \| moderate	12.9 \| fine	60.366 \| fine	26.324 \| good	0.475 \| good	9.458 \| good	0.186 \| good
2026-08-15T07:00:00.000Z	52 \| moderate	9.882 \| good	50.308 \| good	30.825 \| good	1.178 \| good	8.603 \| good	0.186 \| good
2026-08-15T08:00:00.000Z	44 \| good	7.676 \| good	38.79 \| good	23.051 \| good	0.481 \| good	4.979 \| good	0.15 \| good
2026-08-15T09:00:00.000Z	52 \| moderate	9.64 \| good	40.273 \| good	23.847 \| good	0.38 \| good	4.25 \| good	0.182 \| good
2026-08-15T10:00:00.000Z	52 \| moderate	10.496 \| good	33.985 \| good	25.422 \| good	0.399 \| good	4.11 \| good	0.166 \| good
2026-08-15T11:00:00.000Z	49 \| good	9.122 \| good	40.618 \| good	28.576 \| good	0.438 \| good	4.271 \| good	0.2 \| good
2026-08-15T12:00:00.000Z	54 \| moderate	10.911 \| good	47.112 \| good	24.085 \| good	0.395 \| good	3.049 \| good	0.197 \| good
2026-08-15T13:00:00.000Z	52 \| moderate	9.673 \| good	39.529 \| good	21.871 \| good	0.353 \| good	2.771 \| good	0.183 \| good
2026-08-15T14:00:00.000Z	38 \| good	7.435 \| good	31.495 \| good	22.748 \| good	0.388 \| good	4.504 \| good	0.2 \| good
2026-08-15T15:00:00.000Z	38 \| good	7.204 \| good	28.946 \| good	28.849 \| good	0.451 \| good	3.717 \| good	0.214 \| good
2026-08-15T16:00:00.000Z	27 \| good	4.552 \| good	19.918 \| good	28.419 \| good	0.724 \| good	4.346 \| good	0.2 \| good
2026-08-15T17:00:00.000Z	28 \| good	3.96 \| good	20.533 \| good	29.708 \| good	0.59 \| good	1.909 \| good	0.214 \| good
2026-08-15T18:00:00.000Z	33 \| good	3.122 \| good	13.024 \| good	35.971 \| good	0.446 \| good	2.899 \| good	0.2 \| good
2026-08-15T19:00:00.000Z	34 \| good	3.373 \| good	16.741 \| good	37.073 \| good	0.443 \| good	1.687 \| good	0.148 \| good
2026-08-15T20:00:00.000Z	33 \| good	2.549 \| good	13.13 \| good	36.435 \| good	0.525 \| good	1.438 \| good	0.197 \| good
2026-08-15T21:00:00.000Z	43 \| good	2.964 \| good	14.24 \| good	46.16 \| good	0.463 \| good	1.958 \| good	0.179 \| good
2026-08-15T22:00:00.000Z	41 \| good	3.179 \| good	14.465 \| good	43.553 \| good	0.319 \| good	1.404 \| good	0.214 \| good
2026-08-15T23:00:00.000Z	39 \| good	3.369 \| good	14.137 \| good	42.386 \| good	0.417 \| good	1.776 \| good	0.214 \| good
2026-08-16T00:00:00.000Z	32 \| good	3.237 \| good	14.77 \| good	34.833 \| good	0.406 \| good	2.292 \| good	0.194 \| good
2026-08-16T01:00:00.000Z	31 \| good	3.239 \| good	13.378 \| good	34.013 \| good	0.36 \| good	5.321 \| good	0.194 \| good
2026-08-16T02:00:00.000Z	31 \| good	3.659 \| good	17.778 \| good	33.121 \| good	0.355 \| good	6.834 \| good	0.221 \| good
2026-08-16T03:00:00.000Z	27 \| good	3.215 \| good	12.367 \| good	28.987 \| good	0.325 \| good	7.176 \| good	0.194 \| good
2026-08-16T04:00:00.000Z	23 \| good	4.305 \| good	19.92 \| good	25.241 \| good	0.325 \| good	6.304 \| good	0.179 \| good
2026-08-16T05:00:00.000Z	22 \| good	3.962 \| good	18.133 \| good	23.766 \| good	0.314 \| good	5.92 \| good	0.179 \| good
2026-08-16T06:00:00.000Z	27 \| good	5.177 \| good	17.8 \| good	22.149 \| good	0.329 \| good	6.808 \| good	0.179 \| good
2026-08-16T07:00:00.000Z	22 \| good	4.16 \| good	16.276 \| good	19.53 \| good	0.316 \| good	5.045 \| good	0.179 \| good
2026-08-16T08:00:00.000Z	23 \| good	4.2 \| good	18.923 \| good	24.879 \| good	0.328 \| good	4.998 \| good	0.179 \| good
2026-08-16T09:00:00.000Z	34 \| good	3.619 \| good	14.635 \| good	36.59 \| good	0.276 \| good	4.247 \| good	0.166 \| good
2026-08-16T10:00:00.000Z	34 \| good	3.619 \| good	14.635 \| good	36.59 \| good	0.276 \| good	4.247 \| good	0.166 \| good
2026-08-15T23:00:00.000Z	40 \| good	4.908 \| good	21.468 \| good	43.231 \| good	0.473 \| good	2.512 \| good	0.175 \| good
2026-08-16T00:00:00.000Z	36 \| good	4.968 \| good	21.36 \| good	38.89 \| good	0.447 \| good	3.618 \| good	0.18 \| good
2026-08-16T01:00:00.000Z	33 \| good	5.685 \| good	24.382 \| good	35.994 \| good	0.47 \| good	8.146 \| good	0.2 \| good
2026-08-16T02:00:00.000Z	52 \| moderate	10.085 \| good	44.557 \| good	32.798 \| good	0.556 \| good	13.597 \| good	0.223 \| good
2026-08-16T03:00:00.000Z	56 \| moderate	12.056 \| good	54.201 \| good	31.015 \| good	0.616 \| good	15.515 \| good	0.231 \| good
2026-08-16T04:00:00.000Z	60 \| moderate	13.931 \| fine	63.077 \| fine	28.491 \| good	0.697 \| good	17.867 \| good	0.242 \| good
2026-08-16T05:00:00.000Z	62 \| moderate	14.687 \| fine	65.534 \| fine	25.685 \| good	0.782 \| good	20.902 \| good	0.259 \| good
2026-08-16T06:00:00.000Z	60 \| moderate	13.809 \| fine	61.523 \| fine	24.668 \| good	0.827 \| good	23.537 \| good	0.279 \| good
2026-08-16T07:00:00.000Z	56 \| moderate	11.889 \| good	52.63 \| good	24.774 \| good	0.847 \| good	25.441 \| good	0.297 \| good
2026-08-16T08:00:00.000Z	49 \| good	8.98 \| good	39.444 \| good	24.779 \| good	0.853 \| good	26.247 \| good	0.313 \| good
2026-08-16T09:00:00.000Z	38 \| good	7.278 \| good	32.124 \| good	23.043 \| good	0.777 \| good	22.493 \| good	0.289 \| good
2026-08-16T10:00:00.000Z	33 \| good	5.585 \| good	24.297 \| good	21.532 \| good	0.699 \| good	14.822 \| good	0.253 \| good
2026-08-16T11:00:00.000Z	23 \| good	4.118 \| good	18.282 \| good	24.896 \| good	0.611 \| good	11.955 \| good	0.241 \| good
2026-08-16T12:00:00.000Z	27 \| good	4.885 \| good	21.497 \| good	26.352 \| good	0.524 \| good	10.716 \| good	0.237 \| good
2026-08-16T13:00:00.000Z	27 \| good	5.155 \| good	22.508 \| good	26.715 \| good	0.427 \| good	9.093 \| good	0.231 \| good
2026-08-16T14:00:00.000Z	38 \| good	6.627 \| good	29.316 \| good	31.103 \| good	0.349 \| good	6.912 \| good	0.216 \| good
2026-08-16T15:00:00.000Z	38 \| good	7.231 \| good	32.249 \| good	34.376 \| good	0.342 \| good	3.817 \| good	0.193 \| good
2026-08-16T16:00:00.000Z	44 \| good	7.737 \| good	34.371 \| good	34.866 \| good	0.325 \| good	2.026 \| good	0.178 \| good
2026-08-16T17:00:00.000Z	44 \| good	7.692 \| good	34.204 \| good	33.402 \| good	0.292 \| good	1.249 \| good	0.171 \| good
2026-08-16T18:00:00.000Z	38 \| good	7.469 \| good	32.553 \| good	31.529 \| good	0.268 \| good	0.947 \| good	0.166 \| good
2026-08-16T19:00:00.000Z	38 \| good	7.143 \| good	31.455 \| good	31.8 \| good	0.237 \| good	0.856 \| good	0.163 \| good
2026-08-16T20:00:00.000Z	38 \| good	7.362 \| good	32.129 \| good	30.695 \| good	0.214 \| good	0.867 \| good	0.161 \| good
2026-08-16T21:00:00.000Z	49 \| good	9.007 \| good	39.431 \| good	29.362 \| good	0.184 \| good	1.12 \| good	0.162 \| good
2026-08-16T22:00:00.000Z	44 \| good	8.436 \| good	37.306 \| good	29.606 \| good	0.162 \| good	1.448 \| good	0.167 \| good
2026-08-16T23:00:00.000Z	44 \| good	8.266 \| good	36.406 \| good	28.721 \| good	0.175 \| good	1.874 \| good	0.179 \| good
2026-08-17T00:00:00.000Z	49 \| good	9.01 \| good	39.486 \| good	29.132 \| good	0.202 \| good	2.575 \| good	0.193 \| good
2026-08-17T01:00:00.000Z	33 \| good	5.75 \| good	24.946 \| good	26.925 \| good	0.244 \| good	3.734 \| good	0.208 \| good
2026-08-17T02:00:00.000Z	49 \| good	9.151 \| good	40.824 \| good	24.594 \| good	0.28 \| good	4.71 \| good	0.217 \| good
2026-08-17T03:00:00.000Z	49 \| good	9.212 \| good	41.138 \| good	21.224 \| good	0.301 \| good	5.632 \| good	0.223 \| good
2026-08-17T04:00:00.000Z	52 \| moderate	10.248 \| good	45.252 \| good	17.385 \| good	0.31 \| good	6.084 \| good	0.224 \| good
2026-08-17T05:00:00.000Z	52 \| moderate	10.443 \| good	46.185 \| good	17.491 \| good	0.303 \| good	6.065 \| good	0.223 \| good
2026-08-17T06:00:00.000Z	52 \| moderate	10.403 \| good	46.229 \| good	18.804 \| good	0.285 \| good	5.55 \| good	0.218 \| good
2026-08-17T07:00:00.000Z	52 \| moderate	10.275 \| good	45.385 \| good	19.954 \| good	0.28 \| good	5.251 \| good	0.212 \| good
2026-08-17T08:00:00.000Z	52 \| moderate	9.687 \| good	43.226 \| good	17.916 \| good	0.288 \| good	5.151 \| good	0.208 \| good
2026-08-17T09:00:00.000Z	49 \| good	9.362 \| good	41.439 \| good	14.791 \| good	0.308 \| good	5.192 \| good	0.204 \| good
2026-08-17T10:00:00.000Z	49 \| good	9.021 \| good	39.586 \| good	11.825 \| good	0.336 \| good	5.302 \| good	0.202 \| good
2026-08-17T11:00:00.000Z	49 \| good	9.29 \| good	41.311 \| good	9.468 \| good	0.361 \| good	5.468 \| good	0.2 \| good
2026-08-17T12:00:00.000Z	54 \| moderate	10.751 \| good	47.583 \| good	11.631 \| good	0.364 \| good	4.971 \| good	0.2 \| good
2026-08-17T13:00:00.000Z	54 \| moderate	11.474 \| good	51.144 \| good	16.052 \| good	0.401 \| good	3.572 \| good	0.194 \| good
2026-08-17T14:00:00.000Z	52 \| moderate	10.395 \| good	46.189 \| good	20.124 \| good	0.434 \| good	2.621 \| good	0.184 \| good
2026-08-17T15:00:00.000Z	49 \| good	9.1 \| good	40.962 \| good	25.74 \| good	0.406 \| good	1.902 \| good	0.18 \| good
2026-08-17T16:00:00.000Z	38 \| good	7.252 \| good	32.218 \| good	30.546 \| good	0.361 \| good	1.348 \| good	0.178 \| good
2026-08-17T17:00:00.000Z	38 \| good	7.325 \| good	32.38 \| good	33.018 \| good	0.314 \| good	1.013 \| good	0.177 \| good
2026-08-17T18:00:00.000Z	33 \| good	6.439 \| good	28.378 \| good	34.071 \| good	0.275 \| good	0.833 \| good	0.176 \| good
2026-08-17T19:00:00.000Z	31 \| good	5.307 \| good	23.073 \| good	34.309 \| good	0.249 \| good	0.719 \| good	0.174 \| good
2026-08-17T20:00:00.000Z	33 \| good	5.658 \| good	24.364 \| good	34.776 \| good	0.236 \| good	0.751 \| good	0.173 \| good
2026-08-17T21:00:00.000Z	33 \| good	6.489 \| good	28.996 \| good	35.592 \| good	0.229 \| good	0.868 \| good	0.173 \| good
2026-08-17T22:00:00.000Z	49 \| good	9.351 \| good	41.469 \| good	32.321 \| good	0.228 \| good	1.14 \| good	0.174 \| good

St. Charles

Get reliable air quality data to drive your business

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

0.17ppm

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

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 12:00:00 on 2026-08-15.

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 07:00:00 on 2026-08-16.

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

As of now, the AQI in St. Charles, Illinois is 34, indicating Good conditions.

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

St. Charles, Illinois air has the highest levels of O3.

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 3.619 μg/m³.

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

The PM₁₀ concentration in St. Charles, Illinois is 14.635 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 0.166 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 0.276 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 36.59 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 4.247 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-14T11:00:00.000Z	71 \| moderate	19.989 \| fine	93.126 \| fine	31.833 \| good	0.335 \| good	3.422 \| good	0.214 \| good
2026-08-14T12:00:00.000Z	67 \| moderate	18.06 \| fine	63.69 \| fine	33.509 \| good	0.179 \| good	5.514 \| good	0.227 \| good
2026-08-14T13:00:00.000Z	69 \| moderate	18.931 \| fine	53.883 \| good	37.597 \| good	0.203 \| good	6.331 \| good	0.251 \| good
2026-08-14T14:00:00.000Z	66 \| moderate	16.514 \| fine	72.974 \| fine	33.908 \| good	0.259 \| good	5.245 \| good	0.24 \| good
2026-08-14T15:00:00.000Z	67 \| moderate	17.595 \| fine	79.144 \| fine	37.746 \| good	0.572 \| good	3.922 \| good	0.227 \| good
2026-08-14T16:00:00.000Z	62 \| moderate	15.477 \| fine	59.863 \| fine	31.48 \| good	0.253 \| good	3.595 \| good	0.23 \| good
2026-08-14T17:00:00.000Z	58 \| moderate	13.086 \| fine	64.058 \| fine	32.591 \| good	0.252 \| good	3.338 \| good	0.23 \| good
2026-08-14T18:00:00.000Z	62 \| moderate	15.25 \| fine	64.559 \| fine	35.078 \| good	0.269 \| good	2.962 \| good	0.2 \| good
2026-08-14T19:00:00.000Z	66 \| moderate	17.165 \| fine	79.107 \| fine	39.15 \| good	0.372 \| good	2.633 \| good	0.214 \| good
2026-08-14T20:00:00.000Z	66 \| moderate	17.203 \| fine	63.818 \| fine	41.046 \| good	0.307 \| good	2.095 \| good	0.214 \| good
2026-08-14T21:00:00.000Z	66 \| moderate	17.038 \| fine	79.26 \| fine	45.507 \| good	0.301 \| good	2.567 \| good	0.214 \| good
2026-08-14T22:00:00.000Z	67 \| moderate	17.654 \| fine	82.37 \| fine	45.502 \| good	0.321 \| good	2.853 \| good	0.249 \| good
2026-08-14T23:00:00.000Z	64 \| moderate	16.045 \| fine	73.444 \| fine	45.797 \| good	0.394 \| good	3.182 \| good	0.235 \| good
2026-08-15T00:00:00.000Z	69 \| moderate	18.96 \| fine	69.986 \| fine	43.581 \| good	0.513 \| good	3.052 \| good	0.235 \| good
2026-08-15T01:00:00.000Z	69 \| moderate	19.326 \| fine	77.306 \| fine	43.433 \| good	0.681 \| good	3.039 \| good	0.272 \| good
2026-08-15T02:00:00.000Z	62 \| moderate	15.26 \| fine	42.541 \| good	32.626 \| good	0.586 \| good	3.423 \| good	0.25 \| good
2026-08-15T03:00:00.000Z	62 \| moderate	15.154 \| fine	46.833 \| good	36.407 \| good	0.445 \| good	4.658 \| good	0.194 \| good
2026-08-15T04:00:00.000Z	60 \| moderate	14.106 \| fine	68.81 \| fine	35.325 \| good	0.585 \| good	8.759 \| good	0.199 \| good
2026-08-15T05:00:00.000Z	62 \| moderate	15.499 \| fine	70.391 \| fine	33.514 \| good	0.354 \| good	10.066 \| good	0.186 \| good
2026-08-15T06:00:00.000Z	58 \| moderate	12.9 \| fine	60.366 \| fine	26.324 \| good	0.475 \| good	9.458 \| good	0.186 \| good
2026-08-15T07:00:00.000Z	52 \| moderate	9.882 \| good	50.308 \| good	30.825 \| good	1.178 \| good	8.603 \| good	0.186 \| good
2026-08-15T08:00:00.000Z	44 \| good	7.676 \| good	38.79 \| good	23.051 \| good	0.481 \| good	4.979 \| good	0.15 \| good
2026-08-15T09:00:00.000Z	52 \| moderate	9.64 \| good	40.273 \| good	23.847 \| good	0.38 \| good	4.25 \| good	0.182 \| good
2026-08-15T10:00:00.000Z	52 \| moderate	10.496 \| good	33.985 \| good	25.422 \| good	0.399 \| good	4.11 \| good	0.166 \| good
2026-08-15T11:00:00.000Z	49 \| good	9.122 \| good	40.618 \| good	28.576 \| good	0.438 \| good	4.271 \| good	0.2 \| good
2026-08-15T12:00:00.000Z	54 \| moderate	10.911 \| good	47.112 \| good	24.085 \| good	0.395 \| good	3.049 \| good	0.197 \| good
2026-08-15T13:00:00.000Z	52 \| moderate	9.673 \| good	39.529 \| good	21.871 \| good	0.353 \| good	2.771 \| good	0.183 \| good
2026-08-15T14:00:00.000Z	38 \| good	7.435 \| good	31.495 \| good	22.748 \| good	0.388 \| good	4.504 \| good	0.2 \| good
2026-08-15T15:00:00.000Z	38 \| good	7.204 \| good	28.946 \| good	28.849 \| good	0.451 \| good	3.717 \| good	0.214 \| good
2026-08-15T16:00:00.000Z	27 \| good	4.552 \| good	19.918 \| good	28.419 \| good	0.724 \| good	4.346 \| good	0.2 \| good
2026-08-15T17:00:00.000Z	28 \| good	3.96 \| good	20.533 \| good	29.708 \| good	0.59 \| good	1.909 \| good	0.214 \| good
2026-08-15T18:00:00.000Z	33 \| good	3.122 \| good	13.024 \| good	35.971 \| good	0.446 \| good	2.899 \| good	0.2 \| good
2026-08-15T19:00:00.000Z	34 \| good	3.373 \| good	16.741 \| good	37.073 \| good	0.443 \| good	1.687 \| good	0.148 \| good
2026-08-15T20:00:00.000Z	33 \| good	2.549 \| good	13.13 \| good	36.435 \| good	0.525 \| good	1.438 \| good	0.197 \| good
2026-08-15T21:00:00.000Z	43 \| good	2.964 \| good	14.24 \| good	46.16 \| good	0.463 \| good	1.958 \| good	0.179 \| good
2026-08-15T22:00:00.000Z	41 \| good	3.179 \| good	14.465 \| good	43.553 \| good	0.319 \| good	1.404 \| good	0.214 \| good
2026-08-15T23:00:00.000Z	39 \| good	3.369 \| good	14.137 \| good	42.386 \| good	0.417 \| good	1.776 \| good	0.214 \| good
2026-08-16T00:00:00.000Z	32 \| good	3.237 \| good	14.77 \| good	34.833 \| good	0.406 \| good	2.292 \| good	0.194 \| good
2026-08-16T01:00:00.000Z	31 \| good	3.239 \| good	13.378 \| good	34.013 \| good	0.36 \| good	5.321 \| good	0.194 \| good
2026-08-16T02:00:00.000Z	31 \| good	3.659 \| good	17.778 \| good	33.121 \| good	0.355 \| good	6.834 \| good	0.221 \| good
2026-08-16T03:00:00.000Z	27 \| good	3.215 \| good	12.367 \| good	28.987 \| good	0.325 \| good	7.176 \| good	0.194 \| good
2026-08-16T04:00:00.000Z	23 \| good	4.305 \| good	19.92 \| good	25.241 \| good	0.325 \| good	6.304 \| good	0.179 \| good
2026-08-16T05:00:00.000Z	22 \| good	3.962 \| good	18.133 \| good	23.766 \| good	0.314 \| good	5.92 \| good	0.179 \| good
2026-08-16T06:00:00.000Z	27 \| good	5.177 \| good	17.8 \| good	22.149 \| good	0.329 \| good	6.808 \| good	0.179 \| good
2026-08-16T07:00:00.000Z	22 \| good	4.16 \| good	16.276 \| good	19.53 \| good	0.316 \| good	5.045 \| good	0.179 \| good
2026-08-16T08:00:00.000Z	23 \| good	4.2 \| good	18.923 \| good	24.879 \| good	0.328 \| good	4.998 \| good	0.179 \| good
2026-08-16T09:00:00.000Z	34 \| good	3.619 \| good	14.635 \| good	36.59 \| good	0.276 \| good	4.247 \| good	0.166 \| good
2026-08-16T10:00:00.000Z	34 \| good	3.619 \| good	14.635 \| good	36.59 \| good	0.276 \| good	4.247 \| good	0.166 \| good
2026-08-15T23:00:00.000Z	40 \| good	4.908 \| good	21.468 \| good	43.231 \| good	0.473 \| good	2.512 \| good	0.175 \| good
2026-08-16T00:00:00.000Z	36 \| good	4.968 \| good	21.36 \| good	38.89 \| good	0.447 \| good	3.618 \| good	0.18 \| good
2026-08-16T01:00:00.000Z	33 \| good	5.685 \| good	24.382 \| good	35.994 \| good	0.47 \| good	8.146 \| good	0.2 \| good
2026-08-16T02:00:00.000Z	52 \| moderate	10.085 \| good	44.557 \| good	32.798 \| good	0.556 \| good	13.597 \| good	0.223 \| good
2026-08-16T03:00:00.000Z	56 \| moderate	12.056 \| good	54.201 \| good	31.015 \| good	0.616 \| good	15.515 \| good	0.231 \| good
2026-08-16T04:00:00.000Z	60 \| moderate	13.931 \| fine	63.077 \| fine	28.491 \| good	0.697 \| good	17.867 \| good	0.242 \| good
2026-08-16T05:00:00.000Z	62 \| moderate	14.687 \| fine	65.534 \| fine	25.685 \| good	0.782 \| good	20.902 \| good	0.259 \| good
2026-08-16T06:00:00.000Z	60 \| moderate	13.809 \| fine	61.523 \| fine	24.668 \| good	0.827 \| good	23.537 \| good	0.279 \| good
2026-08-16T07:00:00.000Z	56 \| moderate	11.889 \| good	52.63 \| good	24.774 \| good	0.847 \| good	25.441 \| good	0.297 \| good
2026-08-16T08:00:00.000Z	49 \| good	8.98 \| good	39.444 \| good	24.779 \| good	0.853 \| good	26.247 \| good	0.313 \| good
2026-08-16T09:00:00.000Z	38 \| good	7.278 \| good	32.124 \| good	23.043 \| good	0.777 \| good	22.493 \| good	0.289 \| good
2026-08-16T10:00:00.000Z	33 \| good	5.585 \| good	24.297 \| good	21.532 \| good	0.699 \| good	14.822 \| good	0.253 \| good
2026-08-16T11:00:00.000Z	23 \| good	4.118 \| good	18.282 \| good	24.896 \| good	0.611 \| good	11.955 \| good	0.241 \| good
2026-08-16T12:00:00.000Z	27 \| good	4.885 \| good	21.497 \| good	26.352 \| good	0.524 \| good	10.716 \| good	0.237 \| good
2026-08-16T13:00:00.000Z	27 \| good	5.155 \| good	22.508 \| good	26.715 \| good	0.427 \| good	9.093 \| good	0.231 \| good
2026-08-16T14:00:00.000Z	38 \| good	6.627 \| good	29.316 \| good	31.103 \| good	0.349 \| good	6.912 \| good	0.216 \| good
2026-08-16T15:00:00.000Z	38 \| good	7.231 \| good	32.249 \| good	34.376 \| good	0.342 \| good	3.817 \| good	0.193 \| good
2026-08-16T16:00:00.000Z	44 \| good	7.737 \| good	34.371 \| good	34.866 \| good	0.325 \| good	2.026 \| good	0.178 \| good
2026-08-16T17:00:00.000Z	44 \| good	7.692 \| good	34.204 \| good	33.402 \| good	0.292 \| good	1.249 \| good	0.171 \| good
2026-08-16T18:00:00.000Z	38 \| good	7.469 \| good	32.553 \| good	31.529 \| good	0.268 \| good	0.947 \| good	0.166 \| good
2026-08-16T19:00:00.000Z	38 \| good	7.143 \| good	31.455 \| good	31.8 \| good	0.237 \| good	0.856 \| good	0.163 \| good
2026-08-16T20:00:00.000Z	38 \| good	7.362 \| good	32.129 \| good	30.695 \| good	0.214 \| good	0.867 \| good	0.161 \| good
2026-08-16T21:00:00.000Z	49 \| good	9.007 \| good	39.431 \| good	29.362 \| good	0.184 \| good	1.12 \| good	0.162 \| good
2026-08-16T22:00:00.000Z	44 \| good	8.436 \| good	37.306 \| good	29.606 \| good	0.162 \| good	1.448 \| good	0.167 \| good
2026-08-16T23:00:00.000Z	44 \| good	8.266 \| good	36.406 \| good	28.721 \| good	0.175 \| good	1.874 \| good	0.179 \| good
2026-08-17T00:00:00.000Z	49 \| good	9.01 \| good	39.486 \| good	29.132 \| good	0.202 \| good	2.575 \| good	0.193 \| good
2026-08-17T01:00:00.000Z	33 \| good	5.75 \| good	24.946 \| good	26.925 \| good	0.244 \| good	3.734 \| good	0.208 \| good
2026-08-17T02:00:00.000Z	49 \| good	9.151 \| good	40.824 \| good	24.594 \| good	0.28 \| good	4.71 \| good	0.217 \| good
2026-08-17T03:00:00.000Z	49 \| good	9.212 \| good	41.138 \| good	21.224 \| good	0.301 \| good	5.632 \| good	0.223 \| good
2026-08-17T04:00:00.000Z	52 \| moderate	10.248 \| good	45.252 \| good	17.385 \| good	0.31 \| good	6.084 \| good	0.224 \| good
2026-08-17T05:00:00.000Z	52 \| moderate	10.443 \| good	46.185 \| good	17.491 \| good	0.303 \| good	6.065 \| good	0.223 \| good
2026-08-17T06:00:00.000Z	52 \| moderate	10.403 \| good	46.229 \| good	18.804 \| good	0.285 \| good	5.55 \| good	0.218 \| good
2026-08-17T07:00:00.000Z	52 \| moderate	10.275 \| good	45.385 \| good	19.954 \| good	0.28 \| good	5.251 \| good	0.212 \| good
2026-08-17T08:00:00.000Z	52 \| moderate	9.687 \| good	43.226 \| good	17.916 \| good	0.288 \| good	5.151 \| good	0.208 \| good
2026-08-17T09:00:00.000Z	49 \| good	9.362 \| good	41.439 \| good	14.791 \| good	0.308 \| good	5.192 \| good	0.204 \| good
2026-08-17T10:00:00.000Z	49 \| good	9.021 \| good	39.586 \| good	11.825 \| good	0.336 \| good	5.302 \| good	0.202 \| good
2026-08-17T11:00:00.000Z	49 \| good	9.29 \| good	41.311 \| good	9.468 \| good	0.361 \| good	5.468 \| good	0.2 \| good
2026-08-17T12:00:00.000Z	54 \| moderate	10.751 \| good	47.583 \| good	11.631 \| good	0.364 \| good	4.971 \| good	0.2 \| good
2026-08-17T13:00:00.000Z	54 \| moderate	11.474 \| good	51.144 \| good	16.052 \| good	0.401 \| good	3.572 \| good	0.194 \| good
2026-08-17T14:00:00.000Z	52 \| moderate	10.395 \| good	46.189 \| good	20.124 \| good	0.434 \| good	2.621 \| good	0.184 \| good
2026-08-17T15:00:00.000Z	49 \| good	9.1 \| good	40.962 \| good	25.74 \| good	0.406 \| good	1.902 \| good	0.18 \| good
2026-08-17T16:00:00.000Z	38 \| good	7.252 \| good	32.218 \| good	30.546 \| good	0.361 \| good	1.348 \| good	0.178 \| good
2026-08-17T17:00:00.000Z	38 \| good	7.325 \| good	32.38 \| good	33.018 \| good	0.314 \| good	1.013 \| good	0.177 \| good
2026-08-17T18:00:00.000Z	33 \| good	6.439 \| good	28.378 \| good	34.071 \| good	0.275 \| good	0.833 \| good	0.176 \| good
2026-08-17T19:00:00.000Z	31 \| good	5.307 \| good	23.073 \| good	34.309 \| good	0.249 \| good	0.719 \| good	0.174 \| good
2026-08-17T20:00:00.000Z	33 \| good	5.658 \| good	24.364 \| good	34.776 \| good	0.236 \| good	0.751 \| good	0.173 \| good
2026-08-17T21:00:00.000Z	33 \| good	6.489 \| good	28.996 \| good	35.592 \| good	0.229 \| good	0.868 \| good	0.173 \| good
2026-08-17T22:00:00.000Z	49 \| good	9.351 \| good	41.469 \| good	32.321 \| good	0.228 \| good	1.14 \| good	0.174 \| 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)

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

Get reliable air quality data to drive your business

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

Air quality in nearby cities

Geneva, Illinois

Batavia, Illinois

South Elgin, Illinois

West Chicago, Illinois

Campton Hills, Illinois

North Aurora, Illinois

How accurate is Illinois, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

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

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

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

What is the PM2.5 level in St. Charles, Illinois at the moment?

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

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

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?

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?

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

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?