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

The current PM10 concentration at Crystal Lake, Illinois is 16.987 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 1.056 ppb.

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

The current ozone (O3) concentration at Crystal Lake, Illinois is 24.984 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 3.532 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 3.822 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)

3.82 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

16.99 μg/m³

155

255

425

605+

Ozone (O₃)

24.98 ppb

201

201+

Sulfur Dioxide (SO₂)

1.06 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.53 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 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
2025-12-11T21:00:00.000Z	38 \| good	7.222 \| good	32.052 \| good	27.375 \| good	0.557 \| good	9.119 \| good	0.239 \| good
2025-12-11T22:00:00.000Z	44 \| good	7.647 \| good	34.069 \| good	25.737 \| good	0.577 \| good	10.877 \| good	0.277 \| good
2025-12-11T23:00:00.000Z	44 \| good	7.889 \| good	35.279 \| good	25.001 \| good	0.641 \| good	14.161 \| good	0.277 \| good
2025-12-12T00:00:00.000Z	44 \| good	8.224 \| good	36.468 \| good	25.47 \| good	0.769 \| good	19.62 \| good	0.288 \| good
2025-12-12T01:00:00.000Z	49 \| good	8.592 \| good	38.266 \| good	22.055 \| good	0.72 \| good	19.006 \| good	0.25 \| good
2025-12-12T02:00:00.000Z	49 \| good	8.811 \| good	38.456 \| good	21.75 \| good	0.745 \| good	18.44 \| good	0.288 \| good
2025-12-12T03:00:00.000Z	54 \| moderate	10.591 \| good	46.926 \| good	12.921 \| good	1.647 \| good	21.585 \| good	0.291 \| good
2025-12-12T04:00:00.000Z	52 \| moderate	9.945 \| good	44.102 \| good	17.172 \| good	0.62 \| good	23.983 \| good	0.288 \| good
2025-12-12T05:00:00.000Z	52 \| moderate	10.151 \| good	45.118 \| good	17.686 \| good	0.717 \| good	25.8 \| good	0.277 \| good
2025-12-12T06:00:00.000Z	52 \| moderate	10.151 \| good	45.118 \| good	13.394 \| good	0.643 \| good	28.605 \| good	0.25 \| good
2025-12-12T07:00:00.000Z	54 \| moderate	10.53 \| good	47.098 \| good	17.751 \| good	0.67 \| good	26.558 \| good	0.239 \| good
2025-12-12T08:00:00.000Z	54 \| moderate	10.991 \| good	48.954 \| good	20.383 \| good	0.738 \| good	25.613 \| good	0.249 \| good
2025-12-12T09:00:00.000Z	56 \| moderate	11.929 \| good	52.77 \| good	21.05 \| good	0.74 \| good	23.233 \| good	0.249 \| good
2025-12-12T10:00:00.000Z	58 \| moderate	12.542 \| fine	57.488 \| fine	19.619 \| good	0.724 \| good	25.724 \| good	0.235 \| good
2025-12-12T11:00:00.000Z	60 \| moderate	13.586 \| fine	61.36 \| fine	18.451 \| good	0.689 \| good	26.26 \| good	0.262 \| good
2025-12-12T12:00:00.000Z	62 \| moderate	15.431 \| fine	68.745 \| fine	14.387 \| good	0.707 \| good	28.701 \| good	0.311 \| good
2025-12-12T13:00:00.000Z	62 \| moderate	15.431 \| fine	68.745 \| fine	8.819 \| good	0.675 \| good	28.228 \| good	0.323 \| good
2025-12-12T14:00:00.000Z	64 \| moderate	16.127 \| fine	71.638 \| fine	6.454 \| good	0.804 \| good	29.029 \| good	0.386 \| good
2025-12-12T15:00:00.000Z	64 \| moderate	16.09 \| fine	72.164 \| fine	9.539 \| good	0.91 \| good	27.79 \| good	0.409 \| good
2025-12-12T16:00:00.000Z	64 \| moderate	16.374 \| fine	73.704 \| fine	11.813 \| good	0.858 \| good	19.726 \| good	0.299 \| good
2025-12-12T17:00:00.000Z	67 \| moderate	17.502 \| fine	77.927 \| fine	14.295 \| good	0.76 \| good	14.146 \| good	0.236 \| good
2025-12-12T18:00:00.000Z	67 \| moderate	18.231 \| fine	81.603 \| fine	15.442 \| good	0.649 \| good	11.122 \| good	0.213 \| good
2025-12-12T19:00:00.000Z	67 \| moderate	18.15 \| fine	81.144 \| fine	17.248 \| good	0.629 \| good	9.121 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	67 \| moderate	17.626 \| fine	79.1 \| fine	20.889 \| good	0.623 \| good	9.765 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	66 \| moderate	17.449 \| fine	77.009 \| fine	22.247 \| good	0.495 \| good	8.618 \| good	0.239 \| good
2025-12-12T22:00:00.000Z	66 \| moderate	17.449 \| fine	77.009 \| fine	24.281 \| good	0.611 \| good	10.118 \| good	0.288 \| good
2025-12-12T23:00:00.000Z	67 \| moderate	17.78 \| fine	78.584 \| fine	24.987 \| good	0.661 \| good	11.867 \| good	0.239 \| good
2025-12-13T00:00:00.000Z	67 \| moderate	18.094 \| fine	80.627 \| fine	23.46 \| good	0.693 \| good	10.414 \| good	0.239 \| good
2025-12-13T01:00:00.000Z	67 \| moderate	18.386 \| fine	80.69 \| fine	23.428 \| good	0.733 \| good	7.932 \| good	0.2 \| good
2025-12-13T02:00:00.000Z	67 \| moderate	18.486 \| fine	82.546 \| fine	23.075 \| good	0.665 \| good	8.061 \| good	0.2 \| good
2025-12-13T03:00:00.000Z	84 \| moderate	27.287 \| fine	118.895 \| fine	19.104 \| good	0.379 \| good	5.167 \| good	0.202 \| good
2025-12-13T04:00:00.000Z	69 \| moderate	19.111 \| fine	84.358 \| fine	22.094 \| good	0.669 \| good	6.053 \| good	0.188 \| good
2025-12-13T05:00:00.000Z	67 \| moderate	18.225 \| fine	80.418 \| fine	22.579 \| good	0.685 \| good	5.516 \| good	0.188 \| good
2025-12-13T06:00:00.000Z	60 \| moderate	13.553 \| fine	60.541 \| fine	22.014 \| good	0.682 \| good	3.778 \| good	0.15 \| good
2025-12-13T07:00:00.000Z	60 \| moderate	13.553 \| fine	60.541 \| fine	21.657 \| good	0.642 \| good	3.786 \| good	0.15 \| good
2025-12-13T08:00:00.000Z	52 \| moderate	9.788 \| good	44.233 \| good	21.521 \| good	0.683 \| good	3.413 \| good	0.15 \| good
2025-12-13T09:00:00.000Z	33 \| good	5.782 \| good	24.973 \| good	21.593 \| good	0.709 \| good	4.122 \| good	0.15 \| good
2025-12-13T10:00:00.000Z	27 \| good	5.002 \| good	21.913 \| good	22.482 \| good	0.682 \| good	4.02 \| good	0.15 \| good
2025-12-13T11:00:00.000Z	27 \| good	5.002 \| good	21.913 \| good	23.604 \| good	0.632 \| good	4.17 \| good	0.138 \| good
2025-12-13T12:00:00.000Z	27 \| good	4.642 \| good	20.168 \| good	23.723 \| good	0.908 \| good	5.825 \| good	0.15 \| good
2025-12-13T13:00:00.000Z	27 \| good	4.642 \| good	20.168 \| good	22.616 \| good	0.699 \| good	6.034 \| good	0.15 \| good
2025-12-13T14:00:00.000Z	27 \| good	4.785 \| good	21.223 \| good	22.936 \| good	0.75 \| good	7.171 \| good	0.188 \| good
2025-12-13T15:00:00.000Z	22 \| good	4.175 \| good	18.64 \| good	23.015 \| good	0.759 \| good	6.43 \| good	0.152 \| good
2025-12-13T16:00:00.000Z	22 \| good	3.941 \| good	17.495 \| good	22.016 \| good	1.041 \| good	6.53 \| good	0.192 \| good
2025-12-13T17:00:00.000Z	22 \| good	3.819 \| good	17.355 \| good	23.398 \| good	0.668 \| good	5.608 \| good	0.192 \| good
2025-12-13T18:00:00.000Z	22 \| good	3.86 \| good	17.196 \| good	22.434 \| good	0.72 \| good	3.493 \| good	0.188 \| good
2025-12-13T19:00:00.000Z	23 \| good	3.822 \| good	16.987 \| good	24.984 \| good	1.056 \| good	3.532 \| good	0.188 \| good
2025-12-13T20:00:00.000Z	23 \| good	3.822 \| good	16.987 \| good	24.984 \| good	1.056 \| good	3.532 \| good	0.188 \| good
2025-12-13T21:00:00.000Z	21 \| good	1.824 \| good	7.613 \| good	23.124 \| good	0.357 \| good	2.993 \| good	0.163 \| good
2025-12-13T22:00:00.000Z	20 \| good	2.104 \| good	8.613 \| good	22.362 \| good	0.349 \| good	3.535 \| good	0.166 \| good
2025-12-13T23:00:00.000Z	18 \| good	3.339 \| good	14.855 \| good	19.17 \| good	0.341 \| good	4.077 \| good	0.168 \| good
2025-12-14T00:00:00.000Z	27 \| good	4.773 \| good	20.855 \| good	18.933 \| good	0.333 \| good	4.619 \| good	0.17 \| good
2025-12-14T01:00:00.000Z	27 \| good	4.858 \| good	20.963 \| good	20.511 \| good	0.333 \| good	4.34 \| good	0.167 \| good
2025-12-14T02:00:00.000Z	27 \| good	4.728 \| good	20.55 \| good	17.619 \| good	0.332 \| good	4.061 \| good	0.164 \| good
2025-12-14T03:00:00.000Z	27 \| good	4.678 \| good	20.572 \| good	18.646 \| good	0.332 \| good	3.782 \| good	0.161 \| good
2025-12-14T04:00:00.000Z	27 \| good	5.165 \| good	22.49 \| good	18.416 \| good	0.316 \| good	3.529 \| good	0.159 \| good
2025-12-14T05:00:00.000Z	33 \| good	5.694 \| good	24.634 \| good	18.288 \| good	0.301 \| good	3.276 \| good	0.158 \| good
2025-12-14T06:00:00.000Z	27 \| good	5.341 \| good	23.062 \| good	17.558 \| good	0.285 \| good	3.023 \| good	0.157 \| good
2025-12-14T07:00:00.000Z	27 \| good	4.546 \| good	20.036 \| good	16.34 \| good	0.268 \| good	2.88 \| good	0.156 \| good
2025-12-14T08:00:00.000Z	27 \| good	4.773 \| good	20.975 \| good	16.215 \| good	0.25 \| good	2.737 \| good	0.155 \| good
2025-12-14T09:00:00.000Z	27 \| good	4.939 \| good	21.207 \| good	15.819 \| good	0.232 \| good	2.595 \| good	0.154 \| good
2025-12-14T10:00:00.000Z	33 \| good	5.53 \| good	23.954 \| good	16.153 \| good	0.238 \| good	2.646 \| good	0.154 \| good
2025-12-14T11:00:00.000Z	33 \| good	6.395 \| good	28.488 \| good	16.855 \| good	0.243 \| good	2.697 \| good	0.154 \| good
2025-12-14T12:00:00.000Z	33 \| good	5.812 \| good	25.168 \| good	16.217 \| good	0.248 \| good	2.748 \| good	0.153 \| good
2025-12-14T13:00:00.000Z	33 \| good	5.587 \| good	24 \| good	15.261 \| good	0.273 \| good	2.916 \| good	0.159 \| good
2025-12-14T14:00:00.000Z	27 \| good	5.489 \| good	23.509 \| good	15.886 \| good	0.298 \| good	3.084 \| good	0.165 \| good
2025-12-14T15:00:00.000Z	27 \| good	5.243 \| good	22.933 \| good	19.213 \| good	0.323 \| good	3.253 \| good	0.17 \| good
2025-12-14T16:00:00.000Z	33 \| good	6.472 \| good	28.978 \| good	19.172 \| good	0.342 \| good	2.951 \| good	0.169 \| good
2025-12-14T17:00:00.000Z	44 \| good	7.718 \| good	33.836 \| good	23.151 \| good	0.361 \| good	2.649 \| good	0.167 \| good
2025-12-14T18:00:00.000Z	38 \| good	6.7 \| good	29.938 \| good	22.948 \| good	0.38 \| good	2.347 \| good	0.166 \| good
2025-12-14T19:00:00.000Z	33 \| good	5.747 \| good	25 \| good	23.076 \| good	0.399 \| good	2.867 \| good	0.169 \| good
2025-12-14T20:00:00.000Z	33 \| good	6.087 \| good	27 \| good	22.522 \| good	0.418 \| good	3.388 \| good	0.171 \| good
2025-12-14T21:00:00.000Z	33 \| good	6.324 \| good	28 \| good	18.735 \| good	0.438 \| good	3.909 \| good	0.174 \| good
2025-12-14T22:00:00.000Z	44 \| good	7.654 \| good	33.832 \| good	15.872 \| good	0.426 \| good	5.15 \| good	0.181 \| good
2025-12-14T23:00:00.000Z	49 \| good	9.049 \| good	40.624 \| good	16.509 \| good	0.414 \| good	6.39 \| good	0.188 \| good
2025-12-15T00:00:00.000Z	49 \| good	8.555 \| good	37.472 \| good	18.264 \| good	0.402 \| good	7.63 \| good	0.196 \| good
2025-12-15T01:00:00.000Z	44 \| good	8.375 \| good	36.898 \| good	19.869 \| good	0.413 \| good	7.752 \| good	0.198 \| good
2025-12-15T02:00:00.000Z	44 \| good	8.49 \| good	37.043 \| good	19.135 \| good	0.423 \| good	7.874 \| good	0.2 \| good
2025-12-15T03:00:00.000Z	38 \| good	7.077 \| good	31.171 \| good	18.361 \| good	0.433 \| good	7.996 \| good	0.202 \| good
2025-12-15T04:00:00.000Z	33 \| good	5.633 \| good	24.166 \| good	15.043 \| good	0.408 \| good	7.297 \| good	0.198 \| good
2025-12-15T05:00:00.000Z	33 \| good	5.84 \| good	25.122 \| good	18.4 \| good	0.382 \| good	6.599 \| good	0.194 \| good
2025-12-15T06:00:00.000Z	33 \| good	5.754 \| good	25.057 \| good	15.749 \| good	0.356 \| good	5.9 \| good	0.19 \| good
2025-12-15T07:00:00.000Z	27 \| good	5.054 \| good	22.018 \| good	14.507 \| good	0.403 \| good	5.328 \| good	0.183 \| good
2025-12-15T08:00:00.000Z	27 \| good	4.523 \| good	19.655 \| good	15.849 \| good	0.45 \| good	4.756 \| good	0.177 \| good
2025-12-15T09:00:00.000Z	22 \| good	4.254 \| good	18.612 \| good	13.496 \| good	0.497 \| good	4.184 \| good	0.17 \| good
2025-12-15T10:00:00.000Z	27 \| good	5.412 \| good	23.506 \| good	10.39 \| good	0.507 \| good	4.439 \| good	0.173 \| good
2025-12-15T11:00:00.000Z	38 \| good	6.916 \| good	30.491 \| good	12.314 \| good	0.517 \| good	4.693 \| good	0.176 \| good
2025-12-15T12:00:00.000Z	38 \| good	7.392 \| good	32.491 \| good	14.48 \| good	0.527 \| good	4.948 \| good	0.178 \| good
2025-12-15T13:00:00.000Z	44 \| good	8.056 \| good	35.449 \| good	13.897 \| good	0.591 \| good	5.697 \| good	0.189 \| good
2025-12-15T14:00:00.000Z	49 \| good	8.774 \| good	38.55 \| good	13.183 \| good	0.654 \| good	6.446 \| good	0.2 \| good
2025-12-15T15:00:00.000Z	52 \| moderate	10.012 \| good	44.529 \| good	15.597 \| good	0.717 \| good	7.195 \| good	0.21 \| good
2025-12-15T16:00:00.000Z	56 \| moderate	12.256 \| fine	55.018 \| fine	18.929 \| good	0.694 \| good	5.896 \| good	0.203 \| good
2025-12-15T17:00:00.000Z	58 \| moderate	12.814 \| fine	57.173 \| fine	24.892 \| good	0.67 \| good	4.596 \| good	0.195 \| good
2025-12-15T18:00:00.000Z	54 \| moderate	10.926 \| good	48.188 \| good	26.261 \| good	0.646 \| good	3.297 \| good	0.187 \| good
2025-12-15T19:00:00.000Z	52 \| moderate	10.417 \| good	46.003 \| good	25.058 \| good	0.631 \| good	3.61 \| good	0.187 \| good
2025-12-15T20:00:00.000Z	52 \| moderate	10.26 \| good	45.491 \| good	23.283 \| good	0.615 \| good	3.922 \| good	0.186 \| good

Crystal Lake

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

0.18ppm

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

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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 03:00:00 on 2025-12-13.

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 06:00:00 on 2025-12-13.

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

The current air quality in Crystal Lake, Illinois is 23, 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 O3.

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 3.822 μg/m³.

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

The current PM₁₀ concentration at Crystal Lake, Illinois is 16.987 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 0.188 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 1.056 ppb.

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

The current ozone (O₃) concentration at Crystal Lake, Illinois is 24.984 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 3.532 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-11T21:00:00.000Z	38 \| good	7.222 \| good	32.052 \| good	27.375 \| good	0.557 \| good	9.119 \| good	0.239 \| good
2025-12-11T22:00:00.000Z	44 \| good	7.647 \| good	34.069 \| good	25.737 \| good	0.577 \| good	10.877 \| good	0.277 \| good
2025-12-11T23:00:00.000Z	44 \| good	7.889 \| good	35.279 \| good	25.001 \| good	0.641 \| good	14.161 \| good	0.277 \| good
2025-12-12T00:00:00.000Z	44 \| good	8.224 \| good	36.468 \| good	25.47 \| good	0.769 \| good	19.62 \| good	0.288 \| good
2025-12-12T01:00:00.000Z	49 \| good	8.592 \| good	38.266 \| good	22.055 \| good	0.72 \| good	19.006 \| good	0.25 \| good
2025-12-12T02:00:00.000Z	49 \| good	8.811 \| good	38.456 \| good	21.75 \| good	0.745 \| good	18.44 \| good	0.288 \| good
2025-12-12T03:00:00.000Z	54 \| moderate	10.591 \| good	46.926 \| good	12.921 \| good	1.647 \| good	21.585 \| good	0.291 \| good
2025-12-12T04:00:00.000Z	52 \| moderate	9.945 \| good	44.102 \| good	17.172 \| good	0.62 \| good	23.983 \| good	0.288 \| good
2025-12-12T05:00:00.000Z	52 \| moderate	10.151 \| good	45.118 \| good	17.686 \| good	0.717 \| good	25.8 \| good	0.277 \| good
2025-12-12T06:00:00.000Z	52 \| moderate	10.151 \| good	45.118 \| good	13.394 \| good	0.643 \| good	28.605 \| good	0.25 \| good
2025-12-12T07:00:00.000Z	54 \| moderate	10.53 \| good	47.098 \| good	17.751 \| good	0.67 \| good	26.558 \| good	0.239 \| good
2025-12-12T08:00:00.000Z	54 \| moderate	10.991 \| good	48.954 \| good	20.383 \| good	0.738 \| good	25.613 \| good	0.249 \| good
2025-12-12T09:00:00.000Z	56 \| moderate	11.929 \| good	52.77 \| good	21.05 \| good	0.74 \| good	23.233 \| good	0.249 \| good
2025-12-12T10:00:00.000Z	58 \| moderate	12.542 \| fine	57.488 \| fine	19.619 \| good	0.724 \| good	25.724 \| good	0.235 \| good
2025-12-12T11:00:00.000Z	60 \| moderate	13.586 \| fine	61.36 \| fine	18.451 \| good	0.689 \| good	26.26 \| good	0.262 \| good
2025-12-12T12:00:00.000Z	62 \| moderate	15.431 \| fine	68.745 \| fine	14.387 \| good	0.707 \| good	28.701 \| good	0.311 \| good
2025-12-12T13:00:00.000Z	62 \| moderate	15.431 \| fine	68.745 \| fine	8.819 \| good	0.675 \| good	28.228 \| good	0.323 \| good
2025-12-12T14:00:00.000Z	64 \| moderate	16.127 \| fine	71.638 \| fine	6.454 \| good	0.804 \| good	29.029 \| good	0.386 \| good
2025-12-12T15:00:00.000Z	64 \| moderate	16.09 \| fine	72.164 \| fine	9.539 \| good	0.91 \| good	27.79 \| good	0.409 \| good
2025-12-12T16:00:00.000Z	64 \| moderate	16.374 \| fine	73.704 \| fine	11.813 \| good	0.858 \| good	19.726 \| good	0.299 \| good
2025-12-12T17:00:00.000Z	67 \| moderate	17.502 \| fine	77.927 \| fine	14.295 \| good	0.76 \| good	14.146 \| good	0.236 \| good
2025-12-12T18:00:00.000Z	67 \| moderate	18.231 \| fine	81.603 \| fine	15.442 \| good	0.649 \| good	11.122 \| good	0.213 \| good
2025-12-12T19:00:00.000Z	67 \| moderate	18.15 \| fine	81.144 \| fine	17.248 \| good	0.629 \| good	9.121 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	67 \| moderate	17.626 \| fine	79.1 \| fine	20.889 \| good	0.623 \| good	9.765 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	66 \| moderate	17.449 \| fine	77.009 \| fine	22.247 \| good	0.495 \| good	8.618 \| good	0.239 \| good
2025-12-12T22:00:00.000Z	66 \| moderate	17.449 \| fine	77.009 \| fine	24.281 \| good	0.611 \| good	10.118 \| good	0.288 \| good
2025-12-12T23:00:00.000Z	67 \| moderate	17.78 \| fine	78.584 \| fine	24.987 \| good	0.661 \| good	11.867 \| good	0.239 \| good
2025-12-13T00:00:00.000Z	67 \| moderate	18.094 \| fine	80.627 \| fine	23.46 \| good	0.693 \| good	10.414 \| good	0.239 \| good
2025-12-13T01:00:00.000Z	67 \| moderate	18.386 \| fine	80.69 \| fine	23.428 \| good	0.733 \| good	7.932 \| good	0.2 \| good
2025-12-13T02:00:00.000Z	67 \| moderate	18.486 \| fine	82.546 \| fine	23.075 \| good	0.665 \| good	8.061 \| good	0.2 \| good
2025-12-13T03:00:00.000Z	84 \| moderate	27.287 \| fine	118.895 \| fine	19.104 \| good	0.379 \| good	5.167 \| good	0.202 \| good
2025-12-13T04:00:00.000Z	69 \| moderate	19.111 \| fine	84.358 \| fine	22.094 \| good	0.669 \| good	6.053 \| good	0.188 \| good
2025-12-13T05:00:00.000Z	67 \| moderate	18.225 \| fine	80.418 \| fine	22.579 \| good	0.685 \| good	5.516 \| good	0.188 \| good
2025-12-13T06:00:00.000Z	60 \| moderate	13.553 \| fine	60.541 \| fine	22.014 \| good	0.682 \| good	3.778 \| good	0.15 \| good
2025-12-13T07:00:00.000Z	60 \| moderate	13.553 \| fine	60.541 \| fine	21.657 \| good	0.642 \| good	3.786 \| good	0.15 \| good
2025-12-13T08:00:00.000Z	52 \| moderate	9.788 \| good	44.233 \| good	21.521 \| good	0.683 \| good	3.413 \| good	0.15 \| good
2025-12-13T09:00:00.000Z	33 \| good	5.782 \| good	24.973 \| good	21.593 \| good	0.709 \| good	4.122 \| good	0.15 \| good
2025-12-13T10:00:00.000Z	27 \| good	5.002 \| good	21.913 \| good	22.482 \| good	0.682 \| good	4.02 \| good	0.15 \| good
2025-12-13T11:00:00.000Z	27 \| good	5.002 \| good	21.913 \| good	23.604 \| good	0.632 \| good	4.17 \| good	0.138 \| good
2025-12-13T12:00:00.000Z	27 \| good	4.642 \| good	20.168 \| good	23.723 \| good	0.908 \| good	5.825 \| good	0.15 \| good
2025-12-13T13:00:00.000Z	27 \| good	4.642 \| good	20.168 \| good	22.616 \| good	0.699 \| good	6.034 \| good	0.15 \| good
2025-12-13T14:00:00.000Z	27 \| good	4.785 \| good	21.223 \| good	22.936 \| good	0.75 \| good	7.171 \| good	0.188 \| good
2025-12-13T15:00:00.000Z	22 \| good	4.175 \| good	18.64 \| good	23.015 \| good	0.759 \| good	6.43 \| good	0.152 \| good
2025-12-13T16:00:00.000Z	22 \| good	3.941 \| good	17.495 \| good	22.016 \| good	1.041 \| good	6.53 \| good	0.192 \| good
2025-12-13T17:00:00.000Z	22 \| good	3.819 \| good	17.355 \| good	23.398 \| good	0.668 \| good	5.608 \| good	0.192 \| good
2025-12-13T18:00:00.000Z	22 \| good	3.86 \| good	17.196 \| good	22.434 \| good	0.72 \| good	3.493 \| good	0.188 \| good
2025-12-13T19:00:00.000Z	23 \| good	3.822 \| good	16.987 \| good	24.984 \| good	1.056 \| good	3.532 \| good	0.188 \| good
2025-12-13T20:00:00.000Z	23 \| good	3.822 \| good	16.987 \| good	24.984 \| good	1.056 \| good	3.532 \| good	0.188 \| good
2025-12-13T21:00:00.000Z	21 \| good	1.824 \| good	7.613 \| good	23.124 \| good	0.357 \| good	2.993 \| good	0.163 \| good
2025-12-13T22:00:00.000Z	20 \| good	2.104 \| good	8.613 \| good	22.362 \| good	0.349 \| good	3.535 \| good	0.166 \| good
2025-12-13T23:00:00.000Z	18 \| good	3.339 \| good	14.855 \| good	19.17 \| good	0.341 \| good	4.077 \| good	0.168 \| good
2025-12-14T00:00:00.000Z	27 \| good	4.773 \| good	20.855 \| good	18.933 \| good	0.333 \| good	4.619 \| good	0.17 \| good
2025-12-14T01:00:00.000Z	27 \| good	4.858 \| good	20.963 \| good	20.511 \| good	0.333 \| good	4.34 \| good	0.167 \| good
2025-12-14T02:00:00.000Z	27 \| good	4.728 \| good	20.55 \| good	17.619 \| good	0.332 \| good	4.061 \| good	0.164 \| good
2025-12-14T03:00:00.000Z	27 \| good	4.678 \| good	20.572 \| good	18.646 \| good	0.332 \| good	3.782 \| good	0.161 \| good
2025-12-14T04:00:00.000Z	27 \| good	5.165 \| good	22.49 \| good	18.416 \| good	0.316 \| good	3.529 \| good	0.159 \| good
2025-12-14T05:00:00.000Z	33 \| good	5.694 \| good	24.634 \| good	18.288 \| good	0.301 \| good	3.276 \| good	0.158 \| good
2025-12-14T06:00:00.000Z	27 \| good	5.341 \| good	23.062 \| good	17.558 \| good	0.285 \| good	3.023 \| good	0.157 \| good
2025-12-14T07:00:00.000Z	27 \| good	4.546 \| good	20.036 \| good	16.34 \| good	0.268 \| good	2.88 \| good	0.156 \| good
2025-12-14T08:00:00.000Z	27 \| good	4.773 \| good	20.975 \| good	16.215 \| good	0.25 \| good	2.737 \| good	0.155 \| good
2025-12-14T09:00:00.000Z	27 \| good	4.939 \| good	21.207 \| good	15.819 \| good	0.232 \| good	2.595 \| good	0.154 \| good
2025-12-14T10:00:00.000Z	33 \| good	5.53 \| good	23.954 \| good	16.153 \| good	0.238 \| good	2.646 \| good	0.154 \| good
2025-12-14T11:00:00.000Z	33 \| good	6.395 \| good	28.488 \| good	16.855 \| good	0.243 \| good	2.697 \| good	0.154 \| good
2025-12-14T12:00:00.000Z	33 \| good	5.812 \| good	25.168 \| good	16.217 \| good	0.248 \| good	2.748 \| good	0.153 \| good
2025-12-14T13:00:00.000Z	33 \| good	5.587 \| good	24 \| good	15.261 \| good	0.273 \| good	2.916 \| good	0.159 \| good
2025-12-14T14:00:00.000Z	27 \| good	5.489 \| good	23.509 \| good	15.886 \| good	0.298 \| good	3.084 \| good	0.165 \| good
2025-12-14T15:00:00.000Z	27 \| good	5.243 \| good	22.933 \| good	19.213 \| good	0.323 \| good	3.253 \| good	0.17 \| good
2025-12-14T16:00:00.000Z	33 \| good	6.472 \| good	28.978 \| good	19.172 \| good	0.342 \| good	2.951 \| good	0.169 \| good
2025-12-14T17:00:00.000Z	44 \| good	7.718 \| good	33.836 \| good	23.151 \| good	0.361 \| good	2.649 \| good	0.167 \| good
2025-12-14T18:00:00.000Z	38 \| good	6.7 \| good	29.938 \| good	22.948 \| good	0.38 \| good	2.347 \| good	0.166 \| good
2025-12-14T19:00:00.000Z	33 \| good	5.747 \| good	25 \| good	23.076 \| good	0.399 \| good	2.867 \| good	0.169 \| good
2025-12-14T20:00:00.000Z	33 \| good	6.087 \| good	27 \| good	22.522 \| good	0.418 \| good	3.388 \| good	0.171 \| good
2025-12-14T21:00:00.000Z	33 \| good	6.324 \| good	28 \| good	18.735 \| good	0.438 \| good	3.909 \| good	0.174 \| good
2025-12-14T22:00:00.000Z	44 \| good	7.654 \| good	33.832 \| good	15.872 \| good	0.426 \| good	5.15 \| good	0.181 \| good
2025-12-14T23:00:00.000Z	49 \| good	9.049 \| good	40.624 \| good	16.509 \| good	0.414 \| good	6.39 \| good	0.188 \| good
2025-12-15T00:00:00.000Z	49 \| good	8.555 \| good	37.472 \| good	18.264 \| good	0.402 \| good	7.63 \| good	0.196 \| good
2025-12-15T01:00:00.000Z	44 \| good	8.375 \| good	36.898 \| good	19.869 \| good	0.413 \| good	7.752 \| good	0.198 \| good
2025-12-15T02:00:00.000Z	44 \| good	8.49 \| good	37.043 \| good	19.135 \| good	0.423 \| good	7.874 \| good	0.2 \| good
2025-12-15T03:00:00.000Z	38 \| good	7.077 \| good	31.171 \| good	18.361 \| good	0.433 \| good	7.996 \| good	0.202 \| good
2025-12-15T04:00:00.000Z	33 \| good	5.633 \| good	24.166 \| good	15.043 \| good	0.408 \| good	7.297 \| good	0.198 \| good
2025-12-15T05:00:00.000Z	33 \| good	5.84 \| good	25.122 \| good	18.4 \| good	0.382 \| good	6.599 \| good	0.194 \| good
2025-12-15T06:00:00.000Z	33 \| good	5.754 \| good	25.057 \| good	15.749 \| good	0.356 \| good	5.9 \| good	0.19 \| good
2025-12-15T07:00:00.000Z	27 \| good	5.054 \| good	22.018 \| good	14.507 \| good	0.403 \| good	5.328 \| good	0.183 \| good
2025-12-15T08:00:00.000Z	27 \| good	4.523 \| good	19.655 \| good	15.849 \| good	0.45 \| good	4.756 \| good	0.177 \| good
2025-12-15T09:00:00.000Z	22 \| good	4.254 \| good	18.612 \| good	13.496 \| good	0.497 \| good	4.184 \| good	0.17 \| good
2025-12-15T10:00:00.000Z	27 \| good	5.412 \| good	23.506 \| good	10.39 \| good	0.507 \| good	4.439 \| good	0.173 \| good
2025-12-15T11:00:00.000Z	38 \| good	6.916 \| good	30.491 \| good	12.314 \| good	0.517 \| good	4.693 \| good	0.176 \| good
2025-12-15T12:00:00.000Z	38 \| good	7.392 \| good	32.491 \| good	14.48 \| good	0.527 \| good	4.948 \| good	0.178 \| good
2025-12-15T13:00:00.000Z	44 \| good	8.056 \| good	35.449 \| good	13.897 \| good	0.591 \| good	5.697 \| good	0.189 \| good
2025-12-15T14:00:00.000Z	49 \| good	8.774 \| good	38.55 \| good	13.183 \| good	0.654 \| good	6.446 \| good	0.2 \| good
2025-12-15T15:00:00.000Z	52 \| moderate	10.012 \| good	44.529 \| good	15.597 \| good	0.717 \| good	7.195 \| good	0.21 \| good
2025-12-15T16:00:00.000Z	56 \| moderate	12.256 \| fine	55.018 \| fine	18.929 \| good	0.694 \| good	5.896 \| good	0.203 \| good
2025-12-15T17:00:00.000Z	58 \| moderate	12.814 \| fine	57.173 \| fine	24.892 \| good	0.67 \| good	4.596 \| good	0.195 \| good
2025-12-15T18:00:00.000Z	54 \| moderate	10.926 \| good	48.188 \| good	26.261 \| good	0.646 \| good	3.297 \| good	0.187 \| good
2025-12-15T19:00:00.000Z	52 \| moderate	10.417 \| good	46.003 \| good	25.058 \| good	0.631 \| good	3.61 \| good	0.187 \| good
2025-12-15T20:00:00.000Z	52 \| moderate	10.26 \| good	45.491 \| good	23.283 \| good	0.615 \| good	3.922 \| good	0.186 \| 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)

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Air quality in nearby cities

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Huntley, Illinois

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

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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?

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