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

The current PM10 concentration at Crystal Lake, Illinois is 35.312 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 1.009 ppb.

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

The current ozone (O3) concentration at Crystal Lake, Illinois is 52.206 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 5.735 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 8.071 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)

8.07 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

35.31 μg/m³

155

255

425

605+

Ozone (O₃)

52.21 ppb

201

201+

Sulfur Dioxide (SO₂)

1.01 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.74 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2026-10-20T23:00:00.000Z	40 \| good	7.4 \| good	33 \| good	42.999 \| good	2.726 \| good	2.934 \| good	0.236 \| good
2026-10-21T00:00:00.000Z	38 \| good	6.8 \| good	30.002 \| good	41 \| good	0.819 \| good	15.537 \| good	0.273 \| good
2026-10-21T01:00:00.000Z	38 \| good	6.501 \| good	29.003 \| good	40.999 \| good	0.634 \| good	30.806 \| good	0.284 \| good
2026-10-21T02:00:00.000Z	38 \| good	6.501 \| good	29.003 \| good	37.999 \| good	0.559 \| good	27.842 \| good	0.296 \| good
2026-10-21T03:00:00.000Z	60 \| moderate	13.79 \| fine	61.073 \| fine	16.663 \| good	2.908 \| good	33.867 \| good	0.297 \| good
2026-10-21T04:00:00.000Z	38 \| good	7.201 \| good	32.004 \| good	28.998 \| good	0.545 \| good	27.544 \| good	0.325 \| good
2026-10-21T05:00:00.000Z	52 \| moderate	10.001 \| good	45.003 \| good	22.998 \| good	1.28 \| good	24.567 \| good	0.299 \| good
2026-10-21T06:00:00.000Z	52 \| moderate	10.001 \| good	45.003 \| good	19.998 \| good	1.616 \| good	22.532 \| good	0.286 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.8 \| fine	57.002 \| fine	12.999 \| good	1.389 \| good	18.679 \| good	0.298 \| good
2026-10-21T08:00:00.000Z	64 \| moderate	16 \| fine	71.001 \| fine	12.998 \| good	0.812 \| good	20.069 \| good	0.259 \| good
2026-10-21T09:00:00.000Z	67 \| moderate	18.3 \| fine	81 \| fine	7.999 \| good	0.786 \| good	19.526 \| good	0.248 \| good
2026-10-21T10:00:00.000Z	75 \| moderate	22.2 \| fine	97.001 \| fine	6 \| good	0.85 \| good	21.274 \| good	0.298 \| good
2026-10-21T11:00:00.000Z	75 \| moderate	22.2 \| fine	97.001 \| fine	9.999 \| good	0.924 \| good	23.54 \| good	0.375 \| good
2026-10-21T12:00:00.000Z	84 \| moderate	27.3 \| fine	118.998 \| fine	6 \| good	0.897 \| good	22.304 \| good	0.388 \| good
2026-10-21T13:00:00.000Z	84 \| moderate	27.299 \| fine	118.998 \| fine	6.999 \| good	0.935 \| good	19.758 \| good	0.388 \| good
2026-10-21T14:00:00.000Z	81 \| moderate	24.8 \| fine	109 \| fine	8.999 \| good	1.151 \| good	23.79 \| good	0.509 \| good
2026-10-21T15:00:00.000Z	81 \| moderate	24.8 \| fine	109.001 \| fine	10.999 \| good	1.49 \| good	23.167 \| good	0.423 \| good
2026-10-21T16:00:00.000Z	73 \| moderate	20.501 \| fine	91.002 \| fine	16.999 \| good	1.718 \| good	21.446 \| good	0.325 \| good
2026-10-21T17:00:00.000Z	52 \| moderate	10.301 \| good	46.006 \| good	22.999 \| good	1.493 \| good	18.954 \| good	0.276 \| good
2026-10-21T18:00:00.000Z	38 \| good	7.101 \| good	32.005 \| good	33.998 \| good	1.504 \| good	16.495 \| good	0.264 \| good
2026-10-21T19:00:00.000Z	42 \| good	7.101 \| good	32.005 \| good	44.998 \| good	1.089 \| good	7.002 \| good	0.264 \| good
2026-10-21T20:00:00.000Z	45 \| good	5.201 \| good	23.003 \| good	48.997 \| good	1.064 \| good	6.225 \| good	0.264 \| good
2026-10-21T21:00:00.000Z	49 \| good	5.2 \| good	23.002 \| good	52.998 \| good	1.13 \| good	6.643 \| good	0.263 \| good
2026-10-21T22:00:00.000Z	49 \| good	5.3 \| good	23.001 \| good	52.998 \| good	1.113 \| good	3.892 \| good	0.264 \| good
2026-10-21T23:00:00.000Z	49 \| good	5.7 \| good	25.001 \| good	52.999 \| good	1.277 \| good	12.654 \| good	0.275 \| good
2026-10-22T00:00:00.000Z	41 \| good	6.3 \| good	28.001 \| good	44 \| good	0.876 \| good	24.119 \| good	0.338 \| good
2026-10-22T01:00:00.000Z	38 \| good	7.4 \| good	33.002 \| good	36.001 \| good	0.705 \| good	28.92 \| good	0.374 \| good
2026-10-22T02:00:00.000Z	52 \| moderate	10.4 \| good	46.001 \| good	26 \| good	0.683 \| good	31.288 \| good	0.401 \| good
2026-10-22T03:00:00.000Z	32 \| good	4.375 \| good	19.05 \| good	19.845 \| good	1.75 \| good	33.52 \| good	0.4 \| good
2026-10-22T04:00:00.000Z	54 \| moderate	11.1 \| good	49.001 \| good	15.999 \| good	0.848 \| good	31.235 \| good	0.451 \| good
2026-10-22T05:00:00.000Z	60 \| moderate	13.9 \| fine	63 \| fine	9 \| good	0.772 \| good	24.388 \| good	0.413 \| good
2026-10-22T06:00:00.000Z	62 \| moderate	14.9 \| fine	67 \| fine	6 \| good	0.415 \| good	21.426 \| good	0.463 \| good
2026-10-22T07:00:00.000Z	62 \| moderate	14.9 \| fine	67 \| fine	7 \| good	0.429 \| good	21.776 \| good	0.463 \| good
2026-10-22T08:00:00.000Z	60 \| moderate	14.101 \| fine	63.002 \| fine	9.999 \| good	0.437 \| good	21.907 \| good	0.348 \| good
2026-10-22T09:00:00.000Z	60 \| moderate	14.101 \| fine	63.002 \| fine	8.999 \| good	0.383 \| good	16.422 \| good	0.336 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	6 \| good	0.383 \| good	15.755 \| good	0.324 \| good
2026-10-22T11:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	11 \| good	0.687 \| good	16.15 \| good	0.492 \| good
2026-10-22T12:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	9.999 \| good	0.316 \| good	12.986 \| good	0.518 \| good
2026-10-22T13:00:00.000Z	60 \| moderate	13.901 \| fine	63.002 \| fine	11.998 \| good	0.315 \| good	19.878 \| good	0.447 \| good
2026-10-22T14:00:00.000Z	60 \| moderate	13.901 \| fine	63.003 \| fine	10.999 \| good	0.846 \| good	29.234 \| good	0.498 \| good
2026-10-22T15:00:00.000Z	58 \| moderate	13.001 \| fine	59.003 \| fine	14.998 \| good	1.003 \| good	18.625 \| good	0.533 \| good
2026-10-22T16:00:00.000Z	54 \| moderate	10.501 \| good	47.005 \| good	26.997 \| good	0.803 \| good	10.58 \| good	0.318 \| good
2026-10-22T17:00:00.000Z	54 \| moderate	10.501 \| good	47.005 \| good	32.997 \| good	0.518 \| good	7.87 \| good	0.299 \| good
2026-10-22T18:00:00.000Z	49 \| good	8.901 \| good	39.004 \| good	38.998 \| good	0.587 \| good	4.973 \| good	0.248 \| good
2026-10-22T19:00:00.000Z	49 \| good	8.9 \| good	39.002 \| good	44.997 \| good	1.525 \| good	4.262 \| good	0.225 \| good
2026-10-22T20:00:00.000Z	47 \| good	7.801 \| good	34.002 \| good	50.997 \| good	1.244 \| good	3.08 \| good	0.225 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	7.8 \| good	34.002 \| good	54.998 \| good	1.227 \| good	3.291 \| good	0.264 \| good
2026-10-22T22:00:00.000Z	49 \| good	7.8 \| good	34.002 \| good	52.999 \| good	0.982 \| good	5.586 \| good	0.264 \| good
2026-10-22T22:00:00.000Z	48 \| good	8.071 \| good	35.312 \| good	52.206 \| good	1.009 \| good	5.735 \| good	0.262 \| good
2026-10-22T23:00:00.000Z	54 \| moderate	10.932 \| good	48.164 \| good	41.627 \| good	1.046 \| good	23.667 \| good	0.31 \| good
2026-10-23T00:00:00.000Z	56 \| moderate	11.691 \| good	51.176 \| good	34.295 \| good	1.257 \| good	31.746 \| good	0.369 \| good
2026-10-23T01:00:00.000Z	52 \| moderate	10.318 \| good	46.068 \| good	28.925 \| good	1.435 \| good	35.967 \| good	0.388 \| good
2026-10-23T02:00:00.000Z	49 \| good	9.5 \| good	42.182 \| good	24.005 \| good	1.624 \| good	39.291 \| good	0.394 \| good
2026-10-23T03:00:00.000Z	52 \| moderate	9.857 \| good	44.18 \| good	21.422 \| good	1.821 \| good	41.448 \| good	0.4 \| good
2026-10-23T04:00:00.000Z	52 \| moderate	10.301 \| good	45.264 \| good	19.691 \| good	2.003 \| good	42.975 \| good	0.411 \| good
2026-10-23T05:00:00.000Z	54 \| moderate	10.671 \| good	47.184 \| good	16.574 \| good	2.098 \| good	43.624 \| good	0.418 \| good
2026-10-23T06:00:00.000Z	56 \| moderate	12.207 \| fine	55.116 \| fine	13.902 \| good	2.151 \| good	43.738 \| good	0.412 \| good
2026-10-23T07:00:00.000Z	60 \| moderate	13.817 \| fine	62.948 \| fine	14.867 \| good	2.254 \| good	43.487 \| good	0.404 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	14.021 \| fine	63.071 \| fine	12.788 \| good	2.402 \| good	42.954 \| good	0.395 \| good
2026-10-23T09:00:00.000Z	67 \| moderate	18.107 \| fine	79.233 \| fine	13.66 \| good	2.588 \| good	42.076 \| good	0.386 \| good
2026-10-23T10:00:00.000Z	82 \| moderate	25.967 \| fine	112.983 \| fine	11.939 \| good	2.813 \| good	40.695 \| good	0.378 \| good
2026-10-23T11:00:00.000Z	84 \| moderate	26.887 \| fine	116.91 \| fine	8.35 \| good	3.014 \| good	39.127 \| good	0.373 \| good
2026-10-23T12:00:00.000Z	81 \| moderate	25.282 \| fine	110.864 \| fine	5.252 \| good	3.213 \| good	37.568 \| good	0.38 \| good
2026-10-23T13:00:00.000Z	73 \| moderate	21.332 \| fine	93.146 \| fine	6.972 \| good	3.324 \| good	32.618 \| good	0.402 \| good
2026-10-23T14:00:00.000Z	64 \| moderate	15.818 \| fine	71.07 \| fine	16.453 \| good	3.187 \| good	25.965 \| good	0.389 \| good
2026-10-23T15:00:00.000Z	56 \| moderate	12.415 \| fine	55.245 \| fine	28.01 \| good	3.003 \| good	21.635 \| good	0.363 \| good
2026-10-23T16:00:00.000Z	56 \| moderate	12.037 \| good	54.188 \| good	40.735 \| good	2.674 \| good	17.429 \| good	0.309 \| good
2026-10-23T17:00:00.000Z	56 \| moderate	12.285 \| fine	55.117 \| fine	50.411 \| good	2.265 \| good	12.961 \| good	0.26 \| good
2026-10-23T18:00:00.000Z	58 \| moderate	12.974 \| fine	59.012 \| fine	52.976 \| good	2.219 \| good	9.135 \| good	0.229 \| good
2026-10-23T19:00:00.000Z	58 \| moderate	13.488 \| fine	61.012 \| fine	56.769 \| fine	2.079 \| good	7.461 \| good	0.216 \| good
2026-10-23T20:00:00.000Z	64 \| moderate	13.528 \| fine	61.012 \| fine	58.533 \| fine	1.909 \| good	7.013 \| good	0.21 \| good
2026-10-23T21:00:00.000Z	60 \| moderate	13.957 \| fine	62.955 \| fine	57.025 \| fine	1.866 \| good	7.37 \| good	0.208 \| good
2026-10-23T22:00:00.000Z	62 \| moderate	15.414 \| fine	68.915 \| fine	48.732 \| good	1.842 \| good	10.928 \| good	0.225 \| good
2026-10-23T23:00:00.000Z	67 \| moderate	17.609 \| fine	78.754 \| fine	35.358 \| good	1.911 \| good	17.622 \| good	0.256 \| good
2026-10-24T00:00:00.000Z	67 \| moderate	17.709 \| fine	78.69 \| fine	28.189 \| good	2.034 \| good	22.768 \| good	0.276 \| good
2026-10-24T01:00:00.000Z	62 \| moderate	15.319 \| fine	68.754 \| fine	21.612 \| good	2.145 \| good	25.19 \| good	0.276 \| good
2026-10-24T02:00:00.000Z	60 \| moderate	13.584 \| fine	60.947 \| fine	17.638 \| good	2.206 \| good	26.57 \| good	0.273 \| good
2026-10-24T03:00:00.000Z	58 \| moderate	12.973 \| fine	58.926 \| fine	18.808 \| good	2.217 \| good	27.033 \| good	0.268 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	14.66 \| fine	65.044 \| fine	18.44 \| good	2.186 \| good	26.094 \| good	0.263 \| good
2026-10-24T05:00:00.000Z	62 \| moderate	14.679 \| fine	65.015 \| fine	21.259 \| good	2.115 \| good	22.881 \| good	0.254 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	14.303 \| fine	64.916 \| fine	25.128 \| good	2.024 \| good	19.433 \| good	0.246 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	14.761 \| fine	65.038 \| fine	24.408 \| good	1.916 \| good	16.376 \| good	0.24 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	11.98 \| good	53.98 \| good	25.469 \| good	1.785 \| good	14.078 \| good	0.234 \| good
2026-10-24T09:00:00.000Z	56 \| moderate	12.479 \| fine	56.934 \| fine	27.655 \| good	1.656 \| good	12.465 \| good	0.231 \| good
2026-10-24T10:00:00.000Z	60 \| moderate	13.826 \| fine	62.887 \| fine	22.912 \| good	1.553 \| good	11.587 \| good	0.23 \| good
2026-10-24T11:00:00.000Z	58 \| moderate	13.445 \| fine	60.909 \| fine	19.695 \| good	1.493 \| good	11.485 \| good	0.231 \| good
2026-10-24T12:00:00.000Z	52 \| moderate	10.409 \| good	46.091 \| good	18.121 \| good	1.501 \| good	13.153 \| good	0.237 \| good
2026-10-24T13:00:00.000Z	38 \| good	7.189 \| good	32.161 \| good	20.138 \| good	1.524 \| good	14.17 \| good	0.246 \| good
2026-10-24T14:00:00.000Z	44 \| good	7.538 \| good	33.235 \| good	27.299 \| good	1.506 \| good	13.404 \| good	0.257 \| good
2026-10-24T15:00:00.000Z	49 \| good	8.806 \| good	38.316 \| good	34.022 \| good	1.53 \| good	11.957 \| good	0.253 \| good
2026-10-24T16:00:00.000Z	44 \| good	8.481 \| good	37.195 \| good	42.863 \| good	1.517 \| good	10.949 \| good	0.246 \| good
2026-10-24T17:00:00.000Z	45 \| good	8.249 \| good	36.184 \| good	48.813 \| good	1.491 \| good	9.978 \| good	0.237 \| good
2026-10-24T18:00:00.000Z	52 \| moderate	9.824 \| good	44.072 \| good	50.964 \| good	1.492 \| good	8.705 \| good	0.226 \| good
2026-10-24T19:00:00.000Z	52 \| moderate	9.563 \| good	43.034 \| good	52.255 \| good	1.479 \| good	7.472 \| good	0.214 \| good
2026-10-24T20:00:00.000Z	51 \| moderate	9.418 \| good	42.076 \| good	54.637 \| good	1.488 \| good	7.044 \| good	0.208 \| good
2026-10-24T21:00:00.000Z	54 \| moderate	9.338 \| good	42.039 \| good	55.679 \| fine	1.507 \| good	7.62 \| good	0.208 \| good
2026-10-24T22:00:00.000Z	52 \| moderate	10.385 \| good	46.027 \| good	45.913 \| good	1.509 \| good	9.803 \| good	0.216 \| good

Crystal Lake

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

0.26ppm

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 07:00:00 on 2026-10-22.

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 03:00:00 on 2026-10-22.

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

The current air quality in Crystal Lake, Illinois is 48, 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 8.071 μg/m³.

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

The current PM₁₀ concentration at Crystal Lake, Illinois is 35.312 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 0.262 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 1.009 ppb.

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

The current ozone (O₃) concentration at Crystal Lake, Illinois is 52.206 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 5.735 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T23:00:00.000Z	40 \| good	7.4 \| good	33 \| good	42.999 \| good	2.726 \| good	2.934 \| good	0.236 \| good
2026-10-21T00:00:00.000Z	38 \| good	6.8 \| good	30.002 \| good	41 \| good	0.819 \| good	15.537 \| good	0.273 \| good
2026-10-21T01:00:00.000Z	38 \| good	6.501 \| good	29.003 \| good	40.999 \| good	0.634 \| good	30.806 \| good	0.284 \| good
2026-10-21T02:00:00.000Z	38 \| good	6.501 \| good	29.003 \| good	37.999 \| good	0.559 \| good	27.842 \| good	0.296 \| good
2026-10-21T03:00:00.000Z	60 \| moderate	13.79 \| fine	61.073 \| fine	16.663 \| good	2.908 \| good	33.867 \| good	0.297 \| good
2026-10-21T04:00:00.000Z	38 \| good	7.201 \| good	32.004 \| good	28.998 \| good	0.545 \| good	27.544 \| good	0.325 \| good
2026-10-21T05:00:00.000Z	52 \| moderate	10.001 \| good	45.003 \| good	22.998 \| good	1.28 \| good	24.567 \| good	0.299 \| good
2026-10-21T06:00:00.000Z	52 \| moderate	10.001 \| good	45.003 \| good	19.998 \| good	1.616 \| good	22.532 \| good	0.286 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.8 \| fine	57.002 \| fine	12.999 \| good	1.389 \| good	18.679 \| good	0.298 \| good
2026-10-21T08:00:00.000Z	64 \| moderate	16 \| fine	71.001 \| fine	12.998 \| good	0.812 \| good	20.069 \| good	0.259 \| good
2026-10-21T09:00:00.000Z	67 \| moderate	18.3 \| fine	81 \| fine	7.999 \| good	0.786 \| good	19.526 \| good	0.248 \| good
2026-10-21T10:00:00.000Z	75 \| moderate	22.2 \| fine	97.001 \| fine	6 \| good	0.85 \| good	21.274 \| good	0.298 \| good
2026-10-21T11:00:00.000Z	75 \| moderate	22.2 \| fine	97.001 \| fine	9.999 \| good	0.924 \| good	23.54 \| good	0.375 \| good
2026-10-21T12:00:00.000Z	84 \| moderate	27.3 \| fine	118.998 \| fine	6 \| good	0.897 \| good	22.304 \| good	0.388 \| good
2026-10-21T13:00:00.000Z	84 \| moderate	27.299 \| fine	118.998 \| fine	6.999 \| good	0.935 \| good	19.758 \| good	0.388 \| good
2026-10-21T14:00:00.000Z	81 \| moderate	24.8 \| fine	109 \| fine	8.999 \| good	1.151 \| good	23.79 \| good	0.509 \| good
2026-10-21T15:00:00.000Z	81 \| moderate	24.8 \| fine	109.001 \| fine	10.999 \| good	1.49 \| good	23.167 \| good	0.423 \| good
2026-10-21T16:00:00.000Z	73 \| moderate	20.501 \| fine	91.002 \| fine	16.999 \| good	1.718 \| good	21.446 \| good	0.325 \| good
2026-10-21T17:00:00.000Z	52 \| moderate	10.301 \| good	46.006 \| good	22.999 \| good	1.493 \| good	18.954 \| good	0.276 \| good
2026-10-21T18:00:00.000Z	38 \| good	7.101 \| good	32.005 \| good	33.998 \| good	1.504 \| good	16.495 \| good	0.264 \| good
2026-10-21T19:00:00.000Z	42 \| good	7.101 \| good	32.005 \| good	44.998 \| good	1.089 \| good	7.002 \| good	0.264 \| good
2026-10-21T20:00:00.000Z	45 \| good	5.201 \| good	23.003 \| good	48.997 \| good	1.064 \| good	6.225 \| good	0.264 \| good
2026-10-21T21:00:00.000Z	49 \| good	5.2 \| good	23.002 \| good	52.998 \| good	1.13 \| good	6.643 \| good	0.263 \| good
2026-10-21T22:00:00.000Z	49 \| good	5.3 \| good	23.001 \| good	52.998 \| good	1.113 \| good	3.892 \| good	0.264 \| good
2026-10-21T23:00:00.000Z	49 \| good	5.7 \| good	25.001 \| good	52.999 \| good	1.277 \| good	12.654 \| good	0.275 \| good
2026-10-22T00:00:00.000Z	41 \| good	6.3 \| good	28.001 \| good	44 \| good	0.876 \| good	24.119 \| good	0.338 \| good
2026-10-22T01:00:00.000Z	38 \| good	7.4 \| good	33.002 \| good	36.001 \| good	0.705 \| good	28.92 \| good	0.374 \| good
2026-10-22T02:00:00.000Z	52 \| moderate	10.4 \| good	46.001 \| good	26 \| good	0.683 \| good	31.288 \| good	0.401 \| good
2026-10-22T03:00:00.000Z	32 \| good	4.375 \| good	19.05 \| good	19.845 \| good	1.75 \| good	33.52 \| good	0.4 \| good
2026-10-22T04:00:00.000Z	54 \| moderate	11.1 \| good	49.001 \| good	15.999 \| good	0.848 \| good	31.235 \| good	0.451 \| good
2026-10-22T05:00:00.000Z	60 \| moderate	13.9 \| fine	63 \| fine	9 \| good	0.772 \| good	24.388 \| good	0.413 \| good
2026-10-22T06:00:00.000Z	62 \| moderate	14.9 \| fine	67 \| fine	6 \| good	0.415 \| good	21.426 \| good	0.463 \| good
2026-10-22T07:00:00.000Z	62 \| moderate	14.9 \| fine	67 \| fine	7 \| good	0.429 \| good	21.776 \| good	0.463 \| good
2026-10-22T08:00:00.000Z	60 \| moderate	14.101 \| fine	63.002 \| fine	9.999 \| good	0.437 \| good	21.907 \| good	0.348 \| good
2026-10-22T09:00:00.000Z	60 \| moderate	14.101 \| fine	63.002 \| fine	8.999 \| good	0.383 \| good	16.422 \| good	0.336 \| good
2026-10-22T10:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	6 \| good	0.383 \| good	15.755 \| good	0.324 \| good
2026-10-22T11:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	11 \| good	0.687 \| good	16.15 \| good	0.492 \| good
2026-10-22T12:00:00.000Z	60 \| moderate	13.601 \| fine	61.003 \| fine	9.999 \| good	0.316 \| good	12.986 \| good	0.518 \| good
2026-10-22T13:00:00.000Z	60 \| moderate	13.901 \| fine	63.002 \| fine	11.998 \| good	0.315 \| good	19.878 \| good	0.447 \| good
2026-10-22T14:00:00.000Z	60 \| moderate	13.901 \| fine	63.003 \| fine	10.999 \| good	0.846 \| good	29.234 \| good	0.498 \| good
2026-10-22T15:00:00.000Z	58 \| moderate	13.001 \| fine	59.003 \| fine	14.998 \| good	1.003 \| good	18.625 \| good	0.533 \| good
2026-10-22T16:00:00.000Z	54 \| moderate	10.501 \| good	47.005 \| good	26.997 \| good	0.803 \| good	10.58 \| good	0.318 \| good
2026-10-22T17:00:00.000Z	54 \| moderate	10.501 \| good	47.005 \| good	32.997 \| good	0.518 \| good	7.87 \| good	0.299 \| good
2026-10-22T18:00:00.000Z	49 \| good	8.901 \| good	39.004 \| good	38.998 \| good	0.587 \| good	4.973 \| good	0.248 \| good
2026-10-22T19:00:00.000Z	49 \| good	8.9 \| good	39.002 \| good	44.997 \| good	1.525 \| good	4.262 \| good	0.225 \| good
2026-10-22T20:00:00.000Z	47 \| good	7.801 \| good	34.002 \| good	50.997 \| good	1.244 \| good	3.08 \| good	0.225 \| good
2026-10-22T21:00:00.000Z	51 \| moderate	7.8 \| good	34.002 \| good	54.998 \| good	1.227 \| good	3.291 \| good	0.264 \| good
2026-10-22T22:00:00.000Z	49 \| good	7.8 \| good	34.002 \| good	52.999 \| good	0.982 \| good	5.586 \| good	0.264 \| good
2026-10-22T22:00:00.000Z	48 \| good	8.071 \| good	35.312 \| good	52.206 \| good	1.009 \| good	5.735 \| good	0.262 \| good
2026-10-22T23:00:00.000Z	54 \| moderate	10.932 \| good	48.164 \| good	41.627 \| good	1.046 \| good	23.667 \| good	0.31 \| good
2026-10-23T00:00:00.000Z	56 \| moderate	11.691 \| good	51.176 \| good	34.295 \| good	1.257 \| good	31.746 \| good	0.369 \| good
2026-10-23T01:00:00.000Z	52 \| moderate	10.318 \| good	46.068 \| good	28.925 \| good	1.435 \| good	35.967 \| good	0.388 \| good
2026-10-23T02:00:00.000Z	49 \| good	9.5 \| good	42.182 \| good	24.005 \| good	1.624 \| good	39.291 \| good	0.394 \| good
2026-10-23T03:00:00.000Z	52 \| moderate	9.857 \| good	44.18 \| good	21.422 \| good	1.821 \| good	41.448 \| good	0.4 \| good
2026-10-23T04:00:00.000Z	52 \| moderate	10.301 \| good	45.264 \| good	19.691 \| good	2.003 \| good	42.975 \| good	0.411 \| good
2026-10-23T05:00:00.000Z	54 \| moderate	10.671 \| good	47.184 \| good	16.574 \| good	2.098 \| good	43.624 \| good	0.418 \| good
2026-10-23T06:00:00.000Z	56 \| moderate	12.207 \| fine	55.116 \| fine	13.902 \| good	2.151 \| good	43.738 \| good	0.412 \| good
2026-10-23T07:00:00.000Z	60 \| moderate	13.817 \| fine	62.948 \| fine	14.867 \| good	2.254 \| good	43.487 \| good	0.404 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	14.021 \| fine	63.071 \| fine	12.788 \| good	2.402 \| good	42.954 \| good	0.395 \| good
2026-10-23T09:00:00.000Z	67 \| moderate	18.107 \| fine	79.233 \| fine	13.66 \| good	2.588 \| good	42.076 \| good	0.386 \| good
2026-10-23T10:00:00.000Z	82 \| moderate	25.967 \| fine	112.983 \| fine	11.939 \| good	2.813 \| good	40.695 \| good	0.378 \| good
2026-10-23T11:00:00.000Z	84 \| moderate	26.887 \| fine	116.91 \| fine	8.35 \| good	3.014 \| good	39.127 \| good	0.373 \| good
2026-10-23T12:00:00.000Z	81 \| moderate	25.282 \| fine	110.864 \| fine	5.252 \| good	3.213 \| good	37.568 \| good	0.38 \| good
2026-10-23T13:00:00.000Z	73 \| moderate	21.332 \| fine	93.146 \| fine	6.972 \| good	3.324 \| good	32.618 \| good	0.402 \| good
2026-10-23T14:00:00.000Z	64 \| moderate	15.818 \| fine	71.07 \| fine	16.453 \| good	3.187 \| good	25.965 \| good	0.389 \| good
2026-10-23T15:00:00.000Z	56 \| moderate	12.415 \| fine	55.245 \| fine	28.01 \| good	3.003 \| good	21.635 \| good	0.363 \| good
2026-10-23T16:00:00.000Z	56 \| moderate	12.037 \| good	54.188 \| good	40.735 \| good	2.674 \| good	17.429 \| good	0.309 \| good
2026-10-23T17:00:00.000Z	56 \| moderate	12.285 \| fine	55.117 \| fine	50.411 \| good	2.265 \| good	12.961 \| good	0.26 \| good
2026-10-23T18:00:00.000Z	58 \| moderate	12.974 \| fine	59.012 \| fine	52.976 \| good	2.219 \| good	9.135 \| good	0.229 \| good
2026-10-23T19:00:00.000Z	58 \| moderate	13.488 \| fine	61.012 \| fine	56.769 \| fine	2.079 \| good	7.461 \| good	0.216 \| good
2026-10-23T20:00:00.000Z	64 \| moderate	13.528 \| fine	61.012 \| fine	58.533 \| fine	1.909 \| good	7.013 \| good	0.21 \| good
2026-10-23T21:00:00.000Z	60 \| moderate	13.957 \| fine	62.955 \| fine	57.025 \| fine	1.866 \| good	7.37 \| good	0.208 \| good
2026-10-23T22:00:00.000Z	62 \| moderate	15.414 \| fine	68.915 \| fine	48.732 \| good	1.842 \| good	10.928 \| good	0.225 \| good
2026-10-23T23:00:00.000Z	67 \| moderate	17.609 \| fine	78.754 \| fine	35.358 \| good	1.911 \| good	17.622 \| good	0.256 \| good
2026-10-24T00:00:00.000Z	67 \| moderate	17.709 \| fine	78.69 \| fine	28.189 \| good	2.034 \| good	22.768 \| good	0.276 \| good
2026-10-24T01:00:00.000Z	62 \| moderate	15.319 \| fine	68.754 \| fine	21.612 \| good	2.145 \| good	25.19 \| good	0.276 \| good
2026-10-24T02:00:00.000Z	60 \| moderate	13.584 \| fine	60.947 \| fine	17.638 \| good	2.206 \| good	26.57 \| good	0.273 \| good
2026-10-24T03:00:00.000Z	58 \| moderate	12.973 \| fine	58.926 \| fine	18.808 \| good	2.217 \| good	27.033 \| good	0.268 \| good
2026-10-24T04:00:00.000Z	62 \| moderate	14.66 \| fine	65.044 \| fine	18.44 \| good	2.186 \| good	26.094 \| good	0.263 \| good
2026-10-24T05:00:00.000Z	62 \| moderate	14.679 \| fine	65.015 \| fine	21.259 \| good	2.115 \| good	22.881 \| good	0.254 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	14.303 \| fine	64.916 \| fine	25.128 \| good	2.024 \| good	19.433 \| good	0.246 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	14.761 \| fine	65.038 \| fine	24.408 \| good	1.916 \| good	16.376 \| good	0.24 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	11.98 \| good	53.98 \| good	25.469 \| good	1.785 \| good	14.078 \| good	0.234 \| good
2026-10-24T09:00:00.000Z	56 \| moderate	12.479 \| fine	56.934 \| fine	27.655 \| good	1.656 \| good	12.465 \| good	0.231 \| good
2026-10-24T10:00:00.000Z	60 \| moderate	13.826 \| fine	62.887 \| fine	22.912 \| good	1.553 \| good	11.587 \| good	0.23 \| good
2026-10-24T11:00:00.000Z	58 \| moderate	13.445 \| fine	60.909 \| fine	19.695 \| good	1.493 \| good	11.485 \| good	0.231 \| good
2026-10-24T12:00:00.000Z	52 \| moderate	10.409 \| good	46.091 \| good	18.121 \| good	1.501 \| good	13.153 \| good	0.237 \| good
2026-10-24T13:00:00.000Z	38 \| good	7.189 \| good	32.161 \| good	20.138 \| good	1.524 \| good	14.17 \| good	0.246 \| good
2026-10-24T14:00:00.000Z	44 \| good	7.538 \| good	33.235 \| good	27.299 \| good	1.506 \| good	13.404 \| good	0.257 \| good
2026-10-24T15:00:00.000Z	49 \| good	8.806 \| good	38.316 \| good	34.022 \| good	1.53 \| good	11.957 \| good	0.253 \| good
2026-10-24T16:00:00.000Z	44 \| good	8.481 \| good	37.195 \| good	42.863 \| good	1.517 \| good	10.949 \| good	0.246 \| good
2026-10-24T17:00:00.000Z	45 \| good	8.249 \| good	36.184 \| good	48.813 \| good	1.491 \| good	9.978 \| good	0.237 \| good
2026-10-24T18:00:00.000Z	52 \| moderate	9.824 \| good	44.072 \| good	50.964 \| good	1.492 \| good	8.705 \| good	0.226 \| good
2026-10-24T19:00:00.000Z	52 \| moderate	9.563 \| good	43.034 \| good	52.255 \| good	1.479 \| good	7.472 \| good	0.214 \| good
2026-10-24T20:00:00.000Z	51 \| moderate	9.418 \| good	42.076 \| good	54.637 \| good	1.488 \| good	7.044 \| good	0.208 \| good
2026-10-24T21:00:00.000Z	54 \| moderate	9.338 \| good	42.039 \| good	55.679 \| fine	1.507 \| good	7.62 \| good	0.208 \| good
2026-10-24T22:00:00.000Z	52 \| moderate	10.385 \| good	46.027 \| good	45.913 \| good	1.509 \| good	9.803 \| good	0.216 \| 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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Crystal Lake, Illinois air quality map: Track AQI near you

Air quality in nearby cities

Cary, Illinois

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Algonquin, Illinois

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Huntley, Illinois

Woodstock, Illinois

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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?

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