What is the current concentration of PM10 in Crystal Lake, Illinois?

The current PM10 concentration at Crystal Lake, Illinois is 25.344 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Crystal Lake, Illinois?

The current sulfur dioxide (SO2) concentration at Crystal Lake, Illinois is 0.74 ppb.

What is the current concentration of ozone (O3) in Crystal Lake, Illinois?

The current ozone (O3) concentration at Crystal Lake, Illinois is 24.675 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Crystal Lake, Illinois?

The current nitrogen dioxide (NO2) concentration at Crystal Lake, Illinois is 17.936 ppb.

Crystal Lake, Illinois live air quality index now

Q: What is the current concentration of PM2.5 in Crystal Lake, Illinois?

The current PM2.5 concentration at Crystal Lake, Illinois is 5.798 μg/m3.

Stay updated with real-time air quality in Crystal Lake, 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

Crystal Lake, Illinois

Last updated: ... (Local time)

Major air pollutants in Crystal Lake, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.84 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

34.59 μg/m³

155

255

425

605+

Ozone (O₃)

4.83 ppb

201

201+

Sulfur Dioxide (SO₂)

0.77 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

13.33 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Crystal Lake, Illinois

Get Live Pollen Counts

Crystal Lake, Illinois

Scroll To Air Quality Map

Track live Crystal Lake, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T09:00:00.000Z	15 \| good	1.644 \| good	6.947 \| good	15.579 \| good	0.763 \| good	6.027 \| good	0.194 \| good
2025-10-23T10:00:00.000Z	14 \| good	1.959 \| good	7.998 \| good	14.692 \| good	0.702 \| good	6.979 \| good	0.209 \| good
2025-10-23T11:00:00.000Z	13 \| good	2.353 \| good	9.948 \| good	14.104 \| good	0.773 \| good	6.992 \| good	0.266 \| good
2025-10-23T12:00:00.000Z	13 \| good	2.359 \| good	9.976 \| good	13.873 \| good	0.656 \| good	7.476 \| good	0.293 \| good
2025-10-23T13:00:00.000Z	16 \| good	2.941 \| good	12.577 \| good	12.944 \| good	0.742 \| good	8.016 \| good	0.303 \| good
2025-10-23T14:00:00.000Z	27 \| good	4.821 \| good	21.15 \| good	11.863 \| good	0.774 \| good	8.156 \| good	0.372 \| good
2025-10-23T15:00:00.000Z	22 \| good	3.884 \| good	17.393 \| good	14.713 \| good	0.863 \| good	6.281 \| good	0.221 \| good
2025-10-23T16:00:00.000Z	16 \| good	3.459 \| good	14.747 \| good	15.575 \| good	1.518 \| good	5.505 \| good	0.256 \| good
2025-10-23T17:00:00.000Z	16 \| good	3.457 \| good	14.724 \| good	17.1 \| good	1.238 \| good	4.329 \| good	0.245 \| good
2025-10-23T18:00:00.000Z	19 \| good	3.443 \| good	15.037 \| good	20.029 \| good	0.968 \| good	4.612 \| good	0.156 \| good
2025-10-23T19:00:00.000Z	22 \| good	3.203 \| good	13.597 \| good	23.826 \| good	1.047 \| good	4.668 \| good	0.198 \| good
2025-10-23T20:00:00.000Z	24 \| good	2.396 \| good	10.462 \| good	25.888 \| good	1.014 \| good	5.898 \| good	0.298 \| good
2025-10-23T21:00:00.000Z	25 \| good	2.053 \| good	8.65 \| good	27.026 \| good	1.011 \| good	5.027 \| good	0.241 \| good
2025-10-23T22:00:00.000Z	26 \| good	1.973 \| good	8.419 \| good	28.317 \| good	1.015 \| good	4.435 \| good	0.298 \| good
2025-10-23T23:00:00.000Z	27 \| good	1.957 \| good	8.398 \| good	28.748 \| good	0.914 \| good	4.497 \| good	0.241 \| good
2025-10-24T00:00:00.000Z	27 \| good	2.33 \| good	9.809 \| good	28.989 \| good	1.026 \| good	8.156 \| good	0.283 \| good
2025-10-24T01:00:00.000Z	25 \| good	2.929 \| good	12.928 \| good	26.793 \| good	1.83 \| good	12.561 \| good	0.294 \| good
2025-10-24T02:00:00.000Z	22 \| good	3.087 \| good	12.946 \| good	24.021 \| good	1.228 \| good	15.879 \| good	0.348 \| good
2025-10-24T03:00:00.000Z	12 \| good	1.488 \| good	5.786 \| good	13.457 \| good	0.588 \| good	9.113 \| good	0.172 \| good
2025-10-24T04:00:00.000Z	19 \| good	3.385 \| good	14.648 \| good	20.096 \| good	1.175 \| good	19.844 \| good	0.221 \| good
2025-10-24T05:00:00.000Z	22 \| good	3.507 \| good	14.491 \| good	18.903 \| good	1.026 \| good	11.961 \| good	0.244 \| good
2025-10-24T06:00:00.000Z	22 \| good	3.672 \| good	16.434 \| good	14.894 \| good	1.035 \| good	9.475 \| good	0.255 \| good
2025-10-24T07:00:00.000Z	22 \| good	3.638 \| good	16.225 \| good	14.893 \| good	1.206 \| good	9.273 \| good	0.267 \| good
2025-10-24T08:00:00.000Z	16 \| good	3.476 \| good	14.669 \| good	12.764 \| good	1.163 \| good	8.175 \| good	0.263 \| good
2025-10-24T09:00:00.000Z	16 \| good	3.226 \| good	13.464 \| good	12.857 \| good	0.922 \| good	9.807 \| good	0.242 \| good
2025-10-24T10:00:00.000Z	16 \| good	3.224 \| good	13.488 \| good	14.089 \| good	1.093 \| good	13.188 \| good	0.309 \| good
2025-10-24T11:00:00.000Z	16 \| good	3.306 \| good	14.357 \| good	13.752 \| good	1.226 \| good	13.973 \| good	0.237 \| good
2025-10-24T12:00:00.000Z	16 \| good	3.34 \| good	14.517 \| good	12.64 \| good	1.034 \| good	13.995 \| good	0.287 \| good
2025-10-24T13:00:00.000Z	22 \| good	3.98 \| good	16.801 \| good	10.023 \| good	0.97 \| good	14.794 \| good	0.287 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.168 \| good	22.747 \| good	10.298 \| good	1.003 \| good	14.533 \| good	0.424 \| good
2025-10-24T15:00:00.000Z	27 \| good	4.936 \| good	22.156 \| good	10.783 \| good	1.244 \| good	14.902 \| good	0.249 \| good
2025-10-24T16:00:00.000Z	22 \| good	4 \| good	17.962 \| good	13.277 \| good	3.808 \| good	12.371 \| good	0.212 \| good
2025-10-24T17:00:00.000Z	22 \| good	3.62 \| good	15.549 \| good	16.276 \| good	0.982 \| good	6.144 \| good	0.213 \| good
2025-10-24T18:00:00.000Z	22 \| good	3.624 \| good	15.634 \| good	18.02 \| good	0.914 \| good	4.528 \| good	0.198 \| good
2025-10-24T19:00:00.000Z	19 \| good	3.085 \| good	12.838 \| good	20.846 \| good	1.026 \| good	5.166 \| good	0.266 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.025 \| good	12.65 \| good	23.623 \| good	0.868 \| good	4.895 \| good	0.283 \| good
2025-10-24T21:00:00.000Z	24 \| good	3.111 \| good	13.474 \| good	25.743 \| good	0.856 \| good	4.468 \| good	0.198 \| good
2025-10-24T22:00:00.000Z	26 \| good	3.101 \| good	13.148 \| good	27.655 \| good	1.159 \| good	5.326 \| good	0.156 \| good
2025-10-24T23:00:00.000Z	26 \| good	3.156 \| good	13.309 \| good	28.214 \| good	1.454 \| good	9.653 \| good	0.24 \| good
2025-10-25T00:00:00.000Z	26 \| good	3.781 \| good	16.45 \| good	27.687 \| good	1.441 \| good	13.768 \| good	0.263 \| good
2025-10-25T01:00:00.000Z	22 \| good	3.747 \| good	16.45 \| good	22.438 \| good	0.741 \| good	21.814 \| good	0.262 \| good
2025-10-25T02:00:00.000Z	33 \| good	6.47 \| good	28.328 \| good	22.303 \| good	0.734 \| good	18.723 \| good	0.385 \| good
2025-10-25T03:00:00.000Z	52 \| moderate	10.26 \| good	45.334 \| good	4.664 \| good	2.281 \| good	23.711 \| good	0.292 \| good
2025-10-25T04:00:00.000Z	44 \| good	8.388 \| good	37.61 \| good	15.363 \| good	1 \| good	19.198 \| good	0.443 \| good
2025-10-25T05:00:00.000Z	52 \| moderate	9.696 \| good	43.6 \| good	10.634 \| good	1.157 \| good	19.012 \| good	0.345 \| good
2025-10-25T06:00:00.000Z	52 \| moderate	9.595 \| good	42.766 \| good	8.666 \| good	0.953 \| good	16.741 \| good	0.295 \| good
2025-10-25T07:00:00.000Z	52 \| moderate	9.619 \| good	42.672 \| good	6.157 \| good	0.911 \| good	15.556 \| good	0.295 \| good
2025-10-25T08:00:00.000Z	49 \| good	9.29 \| good	40.939 \| good	4.688 \| good	0.764 \| good	13.98 \| good	0.295 \| good
2025-10-25T08:00:00.000Z	44 \| good	7.841 \| good	34.592 \| good	4.834 \| good	0.772 \| good	13.331 \| good	0.299 \| good
2025-10-25T04:00:00.000Z	52 \| moderate	10.47 \| good	46.178 \| good	7 \| good	2.086 \| good	19.616 \| good	0.256 \| good
2025-10-25T05:00:00.000Z	60 \| moderate	14.213 \| fine	63.766 \| fine	7.82 \| good	2.284 \| good	19.722 \| good	0.249 \| good
2025-10-25T06:00:00.000Z	54 \| moderate	10.994 \| good	48.704 \| good	6.75 \| good	2.482 \| good	19.827 \| good	0.241 \| good
2025-10-25T07:00:00.000Z	56 \| moderate	12.468 \| fine	56.011 \| fine	3.69 \| good	2.519 \| good	18.922 \| good	0.23 \| good
2025-10-25T08:00:00.000Z	58 \| moderate	13.083 \| fine	58.906 \| fine	1.888 \| good	2.556 \| good	18.016 \| good	0.219 \| good
2025-10-25T09:00:00.000Z	56 \| moderate	12.011 \| good	53.842 \| good	1.266 \| good	2.593 \| good	17.111 \| good	0.207 \| good
2025-10-25T10:00:00.000Z	56 \| moderate	11.827 \| good	52.995 \| good	1.299 \| good	2.649 \| good	17.448 \| good	0.209 \| good
2025-10-25T11:00:00.000Z	52 \| moderate	9.687 \| good	43.425 \| good	1.328 \| good	2.706 \| good	17.786 \| good	0.21 \| good
2025-10-25T12:00:00.000Z	49 \| good	8.974 \| good	39.7 \| good	2.458 \| good	2.762 \| good	18.123 \| good	0.212 \| good
2025-10-25T13:00:00.000Z	38 \| good	6.816 \| good	30.493 \| good	8.478 \| good	2.903 \| good	15.618 \| good	0.213 \| good
2025-10-25T14:00:00.000Z	33 \| good	5.679 \| good	24.729 \| good	14.864 \| good	3.044 \| good	13.113 \| good	0.213 \| good
2025-10-25T15:00:00.000Z	33 \| good	6.321 \| good	28.069 \| good	19.837 \| good	3.184 \| good	10.608 \| good	0.214 \| good
2025-10-25T16:00:00.000Z	44 \| good	8.127 \| good	35.529 \| good	16.527 \| good	2.921 \| good	8.476 \| good	0.194 \| good
2025-10-25T17:00:00.000Z	56 \| moderate	11.952 \| good	53.239 \| good	13.615 \| good	2.659 \| good	6.343 \| good	0.173 \| good
2025-10-25T18:00:00.000Z	62 \| moderate	14.931 \| fine	66.631 \| fine	9.094 \| good	2.396 \| good	4.211 \| good	0.153 \| good
2025-10-25T19:00:00.000Z	62 \| moderate	15.469 \| fine	68.755 \| fine	9.424 \| good	2.299 \| good	4.325 \| good	0.153 \| good
2025-10-25T20:00:00.000Z	64 \| moderate	16.212 \| fine	72.546 \| fine	11.99 \| good	2.202 \| good	4.438 \| good	0.152 \| good
2025-10-25T21:00:00.000Z	62 \| moderate	15.194 \| fine	67.683 \| fine	12.923 \| good	2.106 \| good	4.551 \| good	0.152 \| good
2025-10-25T22:00:00.000Z	52 \| moderate	10.383 \| good	46.33 \| good	20.739 \| good	2 \| good	7.113 \| good	0.17 \| good
2025-10-25T23:00:00.000Z	38 \| good	6.797 \| good	30.055 \| good	27.566 \| good	1.894 \| good	9.675 \| good	0.187 \| good
2025-10-26T00:00:00.000Z	38 \| good	7.118 \| good	31.507 \| good	28.647 \| good	1.788 \| good	12.236 \| good	0.205 \| good
2025-10-26T01:00:00.000Z	27 \| good	4.968 \| good	21.221 \| good	28.021 \| good	1.688 \| good	11.916 \| good	0.2 \| good
2025-10-26T02:00:00.000Z	44 \| good	7.801 \| good	34.041 \| good	28.019 \| good	1.588 \| good	11.596 \| good	0.195 \| good
2025-10-26T03:00:00.000Z	44 \| good	7.686 \| good	33.573 \| good	27.067 \| good	1.488 \| good	11.276 \| good	0.19 \| good
2025-10-26T04:00:00.000Z	27 \| good	5.478 \| good	23.749 \| good	28.979 \| good	1.436 \| good	10.611 \| good	0.186 \| good
2025-10-26T05:00:00.000Z	49 \| good	8.971 \| good	39.575 \| good	29.078 \| good	1.384 \| good	9.946 \| good	0.181 \| good
2025-10-26T06:00:00.000Z	52 \| moderate	9.703 \| good	42.999 \| good	27.85 \| good	1.332 \| good	9.281 \| good	0.177 \| good
2025-10-26T07:00:00.000Z	62 \| moderate	15.057 \| fine	67.724 \| fine	21.909 \| good	1.344 \| good	8.934 \| good	0.177 \| good
2025-10-26T08:00:00.000Z	64 \| moderate	16.016 \| fine	70.914 \| fine	18.463 \| good	1.356 \| good	8.587 \| good	0.176 \| good
2025-10-26T09:00:00.000Z	54 \| moderate	11.226 \| good	49.708 \| good	17.364 \| good	1.368 \| good	8.239 \| good	0.176 \| good
2025-10-26T10:00:00.000Z	62 \| moderate	14.888 \| fine	66.863 \| fine	17.831 \| good	1.503 \| good	8.968 \| good	0.184 \| good
2025-10-26T11:00:00.000Z	58 \| moderate	12.517 \| fine	56.218 \| fine	16.124 \| good	1.639 \| good	9.696 \| good	0.192 \| good
2025-10-26T12:00:00.000Z	54 \| moderate	11.294 \| good	50.092 \| good	16.701 \| good	1.774 \| good	10.424 \| good	0.2 \| good
2025-10-26T13:00:00.000Z	56 \| moderate	11.737 \| good	52.44 \| good	18.633 \| good	2.367 \| good	9.743 \| good	0.211 \| good
2025-10-26T14:00:00.000Z	56 \| moderate	12.027 \| good	53.46 \| good	18.349 \| good	2.96 \| good	9.062 \| good	0.222 \| good
2025-10-26T15:00:00.000Z	54 \| moderate	11.459 \| good	50.67 \| good	21.365 \| good	3.553 \| good	8.38 \| good	0.233 \| good
2025-10-26T16:00:00.000Z	56 \| moderate	12.041 \| good	54.299 \| good	27.044 \| good	3.96 \| good	7.126 \| good	0.215 \| good
2025-10-26T17:00:00.000Z	52 \| moderate	10.2 \| good	45.102 \| good	35.205 \| good	4.367 \| good	5.872 \| good	0.197 \| good
2025-10-26T18:00:00.000Z	52 \| moderate	9.87 \| good	44.003 \| good	37.324 \| good	4.775 \| good	4.617 \| good	0.179 \| good
2025-10-26T19:00:00.000Z	52 \| moderate	10.315 \| good	45.533 \| good	37.635 \| good	3.99 \| good	4.322 \| good	0.174 \| good
2025-10-26T20:00:00.000Z	54 \| moderate	11.25 \| good	49.897 \| good	39.699 \| good	3.206 \| good	4.026 \| good	0.168 \| good
2025-10-26T21:00:00.000Z	52 \| moderate	9.507 \| good	42.511 \| good	40.718 \| good	2.421 \| good	3.73 \| good	0.162 \| good
2025-10-26T22:00:00.000Z	49 \| good	8.984 \| good	39.908 \| good	38.117 \| good	2.038 \| good	5.086 \| good	0.17 \| good
2025-10-26T23:00:00.000Z	49 \| good	9.499 \| good	42.249 \| good	36.994 \| good	1.654 \| good	6.441 \| good	0.177 \| good
2025-10-27T00:00:00.000Z	52 \| moderate	10.408 \| good	10.577 \| good	32.936 \| good	1.251 \| good	7.64 \| good	0.184 \| good
2025-10-27T01:00:00.000Z	30 \| good	2.864 \| good	11.863 \| good	31.664 \| good	1.198 \| good	7.424 \| good	0.179 \| good
2025-10-27T02:00:00.000Z	27 \| good	3.162 \| good	13.073 \| good	28.712 \| good	1.126 \| good	7.051 \| good	0.174 \| good
2025-10-27T03:00:00.000Z	27 \| good	3.031 \| good	12.971 \| good	28.859 \| good	1.053 \| good	6.679 \| good	0.169 \| good

Crystal Lake

Get reliable air quality data to drive your business

Crystal Lake, Illinois air quality map: Track AQI near you

0.31ppm

How accurate is Illinois, USA air quality data?

Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

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 the air quality data for Crystal Lake, Illinois updated?

The air quality for Crystal Lake, Illinois is updated every hour.

When was the worst air quality at Crystal Lake, Illinois in the last 24 hrs?

The worst air quality in Crystal Lake, Illinois in the last 24 hours was observed at 02:00:00 on 2025-10-25.

When was the best air quality at Crystal Lake, Illinois in the last 24 hrs?

In the last 24 hrs, the best air quality in Crystal Lake, Illinois was observed at 05:00:00 on 2025-10-24.

What is the current air quality in Crystal Lake, Illinois?

The current air quality in Crystal Lake, Illinois is 33, categorized as Good based on real-time data.

What pollutant is the most common in Crystal Lake, Illinois?

The most common pollutant in Crystal Lake, Illinois is PM2.5.

What should I do if the air quality in Crystal Lake, Illinois is poor?

If the air quality in Crystal Lake, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Crystal Lake, Illinois?

The current PM_2.5 concentration at Crystal Lake, Illinois is 5.798 μg/m³.

What is the current concentration of PM₁₀ in Crystal Lake, Illinois?

The current PM₁₀ concentration at Crystal Lake, Illinois is 25.344 μg/m³.

What is the current concentration of carbon monoxide (CO) in Crystal Lake, Illinois?

The current carbon monoxide (CO) concentration at Crystal Lake, Illinois is 0.386 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Crystal Lake, Illinois?

The current sulfur dioxide (SO₂) concentration at Crystal Lake, Illinois is 0.74 ppb.

What is the current concentration of ozone (O₃) in Crystal Lake, Illinois?

The current ozone (O₃) concentration at Crystal Lake, Illinois is 24.675 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Crystal Lake, Illinois?

The current nitrogen dioxide (NO₂) concentration at Crystal Lake, Illinois is 17.936 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T09:00:00.000Z	15 \| good	1.644 \| good	6.947 \| good	15.579 \| good	0.763 \| good	6.027 \| good	0.194 \| good
2025-10-23T10:00:00.000Z	14 \| good	1.959 \| good	7.998 \| good	14.692 \| good	0.702 \| good	6.979 \| good	0.209 \| good
2025-10-23T11:00:00.000Z	13 \| good	2.353 \| good	9.948 \| good	14.104 \| good	0.773 \| good	6.992 \| good	0.266 \| good
2025-10-23T12:00:00.000Z	13 \| good	2.359 \| good	9.976 \| good	13.873 \| good	0.656 \| good	7.476 \| good	0.293 \| good
2025-10-23T13:00:00.000Z	16 \| good	2.941 \| good	12.577 \| good	12.944 \| good	0.742 \| good	8.016 \| good	0.303 \| good
2025-10-23T14:00:00.000Z	27 \| good	4.821 \| good	21.15 \| good	11.863 \| good	0.774 \| good	8.156 \| good	0.372 \| good
2025-10-23T15:00:00.000Z	22 \| good	3.884 \| good	17.393 \| good	14.713 \| good	0.863 \| good	6.281 \| good	0.221 \| good
2025-10-23T16:00:00.000Z	16 \| good	3.459 \| good	14.747 \| good	15.575 \| good	1.518 \| good	5.505 \| good	0.256 \| good
2025-10-23T17:00:00.000Z	16 \| good	3.457 \| good	14.724 \| good	17.1 \| good	1.238 \| good	4.329 \| good	0.245 \| good
2025-10-23T18:00:00.000Z	19 \| good	3.443 \| good	15.037 \| good	20.029 \| good	0.968 \| good	4.612 \| good	0.156 \| good
2025-10-23T19:00:00.000Z	22 \| good	3.203 \| good	13.597 \| good	23.826 \| good	1.047 \| good	4.668 \| good	0.198 \| good
2025-10-23T20:00:00.000Z	24 \| good	2.396 \| good	10.462 \| good	25.888 \| good	1.014 \| good	5.898 \| good	0.298 \| good
2025-10-23T21:00:00.000Z	25 \| good	2.053 \| good	8.65 \| good	27.026 \| good	1.011 \| good	5.027 \| good	0.241 \| good
2025-10-23T22:00:00.000Z	26 \| good	1.973 \| good	8.419 \| good	28.317 \| good	1.015 \| good	4.435 \| good	0.298 \| good
2025-10-23T23:00:00.000Z	27 \| good	1.957 \| good	8.398 \| good	28.748 \| good	0.914 \| good	4.497 \| good	0.241 \| good
2025-10-24T00:00:00.000Z	27 \| good	2.33 \| good	9.809 \| good	28.989 \| good	1.026 \| good	8.156 \| good	0.283 \| good
2025-10-24T01:00:00.000Z	25 \| good	2.929 \| good	12.928 \| good	26.793 \| good	1.83 \| good	12.561 \| good	0.294 \| good
2025-10-24T02:00:00.000Z	22 \| good	3.087 \| good	12.946 \| good	24.021 \| good	1.228 \| good	15.879 \| good	0.348 \| good
2025-10-24T03:00:00.000Z	12 \| good	1.488 \| good	5.786 \| good	13.457 \| good	0.588 \| good	9.113 \| good	0.172 \| good
2025-10-24T04:00:00.000Z	19 \| good	3.385 \| good	14.648 \| good	20.096 \| good	1.175 \| good	19.844 \| good	0.221 \| good
2025-10-24T05:00:00.000Z	22 \| good	3.507 \| good	14.491 \| good	18.903 \| good	1.026 \| good	11.961 \| good	0.244 \| good
2025-10-24T06:00:00.000Z	22 \| good	3.672 \| good	16.434 \| good	14.894 \| good	1.035 \| good	9.475 \| good	0.255 \| good
2025-10-24T07:00:00.000Z	22 \| good	3.638 \| good	16.225 \| good	14.893 \| good	1.206 \| good	9.273 \| good	0.267 \| good
2025-10-24T08:00:00.000Z	16 \| good	3.476 \| good	14.669 \| good	12.764 \| good	1.163 \| good	8.175 \| good	0.263 \| good
2025-10-24T09:00:00.000Z	16 \| good	3.226 \| good	13.464 \| good	12.857 \| good	0.922 \| good	9.807 \| good	0.242 \| good
2025-10-24T10:00:00.000Z	16 \| good	3.224 \| good	13.488 \| good	14.089 \| good	1.093 \| good	13.188 \| good	0.309 \| good
2025-10-24T11:00:00.000Z	16 \| good	3.306 \| good	14.357 \| good	13.752 \| good	1.226 \| good	13.973 \| good	0.237 \| good
2025-10-24T12:00:00.000Z	16 \| good	3.34 \| good	14.517 \| good	12.64 \| good	1.034 \| good	13.995 \| good	0.287 \| good
2025-10-24T13:00:00.000Z	22 \| good	3.98 \| good	16.801 \| good	10.023 \| good	0.97 \| good	14.794 \| good	0.287 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.168 \| good	22.747 \| good	10.298 \| good	1.003 \| good	14.533 \| good	0.424 \| good
2025-10-24T15:00:00.000Z	27 \| good	4.936 \| good	22.156 \| good	10.783 \| good	1.244 \| good	14.902 \| good	0.249 \| good
2025-10-24T16:00:00.000Z	22 \| good	4 \| good	17.962 \| good	13.277 \| good	3.808 \| good	12.371 \| good	0.212 \| good
2025-10-24T17:00:00.000Z	22 \| good	3.62 \| good	15.549 \| good	16.276 \| good	0.982 \| good	6.144 \| good	0.213 \| good
2025-10-24T18:00:00.000Z	22 \| good	3.624 \| good	15.634 \| good	18.02 \| good	0.914 \| good	4.528 \| good	0.198 \| good
2025-10-24T19:00:00.000Z	19 \| good	3.085 \| good	12.838 \| good	20.846 \| good	1.026 \| good	5.166 \| good	0.266 \| good
2025-10-24T20:00:00.000Z	22 \| good	3.025 \| good	12.65 \| good	23.623 \| good	0.868 \| good	4.895 \| good	0.283 \| good
2025-10-24T21:00:00.000Z	24 \| good	3.111 \| good	13.474 \| good	25.743 \| good	0.856 \| good	4.468 \| good	0.198 \| good
2025-10-24T22:00:00.000Z	26 \| good	3.101 \| good	13.148 \| good	27.655 \| good	1.159 \| good	5.326 \| good	0.156 \| good
2025-10-24T23:00:00.000Z	26 \| good	3.156 \| good	13.309 \| good	28.214 \| good	1.454 \| good	9.653 \| good	0.24 \| good
2025-10-25T00:00:00.000Z	26 \| good	3.781 \| good	16.45 \| good	27.687 \| good	1.441 \| good	13.768 \| good	0.263 \| good
2025-10-25T01:00:00.000Z	22 \| good	3.747 \| good	16.45 \| good	22.438 \| good	0.741 \| good	21.814 \| good	0.262 \| good
2025-10-25T02:00:00.000Z	33 \| good	6.47 \| good	28.328 \| good	22.303 \| good	0.734 \| good	18.723 \| good	0.385 \| good
2025-10-25T03:00:00.000Z	52 \| moderate	10.26 \| good	45.334 \| good	4.664 \| good	2.281 \| good	23.711 \| good	0.292 \| good
2025-10-25T04:00:00.000Z	44 \| good	8.388 \| good	37.61 \| good	15.363 \| good	1 \| good	19.198 \| good	0.443 \| good
2025-10-25T05:00:00.000Z	52 \| moderate	9.696 \| good	43.6 \| good	10.634 \| good	1.157 \| good	19.012 \| good	0.345 \| good
2025-10-25T06:00:00.000Z	52 \| moderate	9.595 \| good	42.766 \| good	8.666 \| good	0.953 \| good	16.741 \| good	0.295 \| good
2025-10-25T07:00:00.000Z	52 \| moderate	9.619 \| good	42.672 \| good	6.157 \| good	0.911 \| good	15.556 \| good	0.295 \| good
2025-10-25T08:00:00.000Z	49 \| good	9.29 \| good	40.939 \| good	4.688 \| good	0.764 \| good	13.98 \| good	0.295 \| good
2025-10-25T08:00:00.000Z	44 \| good	7.841 \| good	34.592 \| good	4.834 \| good	0.772 \| good	13.331 \| good	0.299 \| good
2025-10-25T04:00:00.000Z	52 \| moderate	10.47 \| good	46.178 \| good	7 \| good	2.086 \| good	19.616 \| good	0.256 \| good
2025-10-25T05:00:00.000Z	60 \| moderate	14.213 \| fine	63.766 \| fine	7.82 \| good	2.284 \| good	19.722 \| good	0.249 \| good
2025-10-25T06:00:00.000Z	54 \| moderate	10.994 \| good	48.704 \| good	6.75 \| good	2.482 \| good	19.827 \| good	0.241 \| good
2025-10-25T07:00:00.000Z	56 \| moderate	12.468 \| fine	56.011 \| fine	3.69 \| good	2.519 \| good	18.922 \| good	0.23 \| good
2025-10-25T08:00:00.000Z	58 \| moderate	13.083 \| fine	58.906 \| fine	1.888 \| good	2.556 \| good	18.016 \| good	0.219 \| good
2025-10-25T09:00:00.000Z	56 \| moderate	12.011 \| good	53.842 \| good	1.266 \| good	2.593 \| good	17.111 \| good	0.207 \| good
2025-10-25T10:00:00.000Z	56 \| moderate	11.827 \| good	52.995 \| good	1.299 \| good	2.649 \| good	17.448 \| good	0.209 \| good
2025-10-25T11:00:00.000Z	52 \| moderate	9.687 \| good	43.425 \| good	1.328 \| good	2.706 \| good	17.786 \| good	0.21 \| good
2025-10-25T12:00:00.000Z	49 \| good	8.974 \| good	39.7 \| good	2.458 \| good	2.762 \| good	18.123 \| good	0.212 \| good
2025-10-25T13:00:00.000Z	38 \| good	6.816 \| good	30.493 \| good	8.478 \| good	2.903 \| good	15.618 \| good	0.213 \| good
2025-10-25T14:00:00.000Z	33 \| good	5.679 \| good	24.729 \| good	14.864 \| good	3.044 \| good	13.113 \| good	0.213 \| good
2025-10-25T15:00:00.000Z	33 \| good	6.321 \| good	28.069 \| good	19.837 \| good	3.184 \| good	10.608 \| good	0.214 \| good
2025-10-25T16:00:00.000Z	44 \| good	8.127 \| good	35.529 \| good	16.527 \| good	2.921 \| good	8.476 \| good	0.194 \| good
2025-10-25T17:00:00.000Z	56 \| moderate	11.952 \| good	53.239 \| good	13.615 \| good	2.659 \| good	6.343 \| good	0.173 \| good
2025-10-25T18:00:00.000Z	62 \| moderate	14.931 \| fine	66.631 \| fine	9.094 \| good	2.396 \| good	4.211 \| good	0.153 \| good
2025-10-25T19:00:00.000Z	62 \| moderate	15.469 \| fine	68.755 \| fine	9.424 \| good	2.299 \| good	4.325 \| good	0.153 \| good
2025-10-25T20:00:00.000Z	64 \| moderate	16.212 \| fine	72.546 \| fine	11.99 \| good	2.202 \| good	4.438 \| good	0.152 \| good
2025-10-25T21:00:00.000Z	62 \| moderate	15.194 \| fine	67.683 \| fine	12.923 \| good	2.106 \| good	4.551 \| good	0.152 \| good
2025-10-25T22:00:00.000Z	52 \| moderate	10.383 \| good	46.33 \| good	20.739 \| good	2 \| good	7.113 \| good	0.17 \| good
2025-10-25T23:00:00.000Z	38 \| good	6.797 \| good	30.055 \| good	27.566 \| good	1.894 \| good	9.675 \| good	0.187 \| good
2025-10-26T00:00:00.000Z	38 \| good	7.118 \| good	31.507 \| good	28.647 \| good	1.788 \| good	12.236 \| good	0.205 \| good
2025-10-26T01:00:00.000Z	27 \| good	4.968 \| good	21.221 \| good	28.021 \| good	1.688 \| good	11.916 \| good	0.2 \| good
2025-10-26T02:00:00.000Z	44 \| good	7.801 \| good	34.041 \| good	28.019 \| good	1.588 \| good	11.596 \| good	0.195 \| good
2025-10-26T03:00:00.000Z	44 \| good	7.686 \| good	33.573 \| good	27.067 \| good	1.488 \| good	11.276 \| good	0.19 \| good
2025-10-26T04:00:00.000Z	27 \| good	5.478 \| good	23.749 \| good	28.979 \| good	1.436 \| good	10.611 \| good	0.186 \| good
2025-10-26T05:00:00.000Z	49 \| good	8.971 \| good	39.575 \| good	29.078 \| good	1.384 \| good	9.946 \| good	0.181 \| good
2025-10-26T06:00:00.000Z	52 \| moderate	9.703 \| good	42.999 \| good	27.85 \| good	1.332 \| good	9.281 \| good	0.177 \| good
2025-10-26T07:00:00.000Z	62 \| moderate	15.057 \| fine	67.724 \| fine	21.909 \| good	1.344 \| good	8.934 \| good	0.177 \| good
2025-10-26T08:00:00.000Z	64 \| moderate	16.016 \| fine	70.914 \| fine	18.463 \| good	1.356 \| good	8.587 \| good	0.176 \| good
2025-10-26T09:00:00.000Z	54 \| moderate	11.226 \| good	49.708 \| good	17.364 \| good	1.368 \| good	8.239 \| good	0.176 \| good
2025-10-26T10:00:00.000Z	62 \| moderate	14.888 \| fine	66.863 \| fine	17.831 \| good	1.503 \| good	8.968 \| good	0.184 \| good
2025-10-26T11:00:00.000Z	58 \| moderate	12.517 \| fine	56.218 \| fine	16.124 \| good	1.639 \| good	9.696 \| good	0.192 \| good
2025-10-26T12:00:00.000Z	54 \| moderate	11.294 \| good	50.092 \| good	16.701 \| good	1.774 \| good	10.424 \| good	0.2 \| good
2025-10-26T13:00:00.000Z	56 \| moderate	11.737 \| good	52.44 \| good	18.633 \| good	2.367 \| good	9.743 \| good	0.211 \| good
2025-10-26T14:00:00.000Z	56 \| moderate	12.027 \| good	53.46 \| good	18.349 \| good	2.96 \| good	9.062 \| good	0.222 \| good
2025-10-26T15:00:00.000Z	54 \| moderate	11.459 \| good	50.67 \| good	21.365 \| good	3.553 \| good	8.38 \| good	0.233 \| good
2025-10-26T16:00:00.000Z	56 \| moderate	12.041 \| good	54.299 \| good	27.044 \| good	3.96 \| good	7.126 \| good	0.215 \| good
2025-10-26T17:00:00.000Z	52 \| moderate	10.2 \| good	45.102 \| good	35.205 \| good	4.367 \| good	5.872 \| good	0.197 \| good
2025-10-26T18:00:00.000Z	52 \| moderate	9.87 \| good	44.003 \| good	37.324 \| good	4.775 \| good	4.617 \| good	0.179 \| good
2025-10-26T19:00:00.000Z	52 \| moderate	10.315 \| good	45.533 \| good	37.635 \| good	3.99 \| good	4.322 \| good	0.174 \| good
2025-10-26T20:00:00.000Z	54 \| moderate	11.25 \| good	49.897 \| good	39.699 \| good	3.206 \| good	4.026 \| good	0.168 \| good
2025-10-26T21:00:00.000Z	52 \| moderate	9.507 \| good	42.511 \| good	40.718 \| good	2.421 \| good	3.73 \| good	0.162 \| good
2025-10-26T22:00:00.000Z	49 \| good	8.984 \| good	39.908 \| good	38.117 \| good	2.038 \| good	5.086 \| good	0.17 \| good
2025-10-26T23:00:00.000Z	49 \| good	9.499 \| good	42.249 \| good	36.994 \| good	1.654 \| good	6.441 \| good	0.177 \| good
2025-10-27T00:00:00.000Z	52 \| moderate	10.408 \| good	10.577 \| good	32.936 \| good	1.251 \| good	7.64 \| good	0.184 \| good
2025-10-27T01:00:00.000Z	30 \| good	2.864 \| good	11.863 \| good	31.664 \| good	1.198 \| good	7.424 \| good	0.179 \| good
2025-10-27T02:00:00.000Z	27 \| good	3.162 \| good	13.073 \| good	28.712 \| good	1.126 \| good	7.051 \| good	0.174 \| good
2025-10-27T03:00:00.000Z	27 \| good	3.031 \| good	12.971 \| good	28.859 \| good	1.053 \| good	6.679 \| good	0.169 \| good

Crystal Lake, Illinois live air quality index now

Major air pollutants in Crystal Lake, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Crystal Lake, Illinois air quality forecast and history

Get reliable air quality data to drive your business

Crystal Lake, Illinois air quality map: Track AQI near you

Air quality in nearby cities

Cary, Illinois

Lake In The Hills, Illinois

Algonquin, Illinois

McHenry, Illinois

Huntley, Illinois

Woodstock, Illinois

How accurate is Illinois, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is the air quality data for Crystal Lake, Illinois updated?

When was the worst air quality at Crystal Lake, Illinois in the last 24 hrs?

When was the best air quality at Crystal Lake, Illinois in the last 24 hrs?

What is the current air quality in Crystal Lake, Illinois?

What pollutant is the most common in Crystal Lake, Illinois?

What should I do if the air quality in Crystal Lake, Illinois is poor?

What is the current concentration of PM2.5 in Crystal Lake, Illinois?

What is the current concentration of PM10 in Crystal Lake, Illinois?

What is the current concentration of carbon monoxide (CO) in Crystal Lake, Illinois?

What is the current concentration of sulfur dioxide (SO2) in Crystal Lake, Illinois?

What is the current concentration of ozone (O3) in Crystal Lake, Illinois?

What is the current concentration of nitrogen dioxide (NO2) in Crystal Lake, Illinois?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Crystal Lake, Illinois?

What is the current concentration of PM₁₀ in Crystal Lake, Illinois?

What is the current concentration of sulfur dioxide (SO₂) in Crystal Lake, Illinois?

What is the current concentration of ozone (O₃) in Crystal Lake, Illinois?

What is the current concentration of nitrogen dioxide (NO₂) in Crystal Lake, Illinois?