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

The current PM10 concentration at Crystal Lake, Illinois is 121.133 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 1.171 ppb.

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

The current ozone (O3) concentration at Crystal Lake, Illinois is 36.687 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 3.811 ppb.

Crystal Lake, Illinois live air quality index now

Name: Live air pollution levels in Crystal Lake, Illinois today
Creator: Ambee

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)

Moderate

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)

16.64 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

73.32 μg/m³

155

255

425

605+

Ozone (O₃)

43.23 ppb

201

201+

Sulfur Dioxide (SO₂)

0.53 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.85 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 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
2025-07-22T01:00:00.000Z	75 \| moderate	21.965 \| fine	97.201 \| fine	44.66 \| good	1.543 \| good	2.949 \| good	0.303 \| good
2025-07-22T02:00:00.000Z	75 \| moderate	22.243 \| fine	98.254 \| fine	42.525 \| good	1.299 \| good	3.368 \| good	0.291 \| good
2025-07-22T03:00:00.000Z	54 \| moderate	10.622 \| good	47.085 \| good	28.438 \| good	1.084 \| good	7.426 \| good	0.262 \| good
2025-07-22T04:00:00.000Z	84 \| moderate	26.516 \| fine	116.259 \| fine	37.948 \| good	0.415 \| good	6.079 \| good	0.209 \| good
2025-07-22T05:00:00.000Z	82 \| moderate	25.593 \| fine	111.022 \| fine	35.64 \| good	0.532 \| good	7.77 \| good	0.162 \| good
2025-07-22T06:00:00.000Z	82 \| moderate	25.752 \| fine	111.896 \| fine	32.79 \| good	0.762 \| good	11.168 \| good	0.15 \| good
2025-07-22T07:00:00.000Z	75 \| moderate	21.605 \| fine	94.888 \| fine	28.994 \| good	0.633 \| good	8.909 \| good	0.124 \| good
2025-07-22T08:00:00.000Z	75 \| moderate	21.538 \| fine	94.642 \| fine	25.23 \| good	0.461 \| good	12.588 \| good	0.124 \| good
2025-07-22T09:00:00.000Z	62 \| moderate	15.35 \| fine	68.857 \| fine	25.826 \| good	0.275 \| good	11.613 \| good	0.113 \| good
2025-07-22T10:00:00.000Z	60 \| moderate	14.342 \| fine	65.448 \| fine	24.901 \| good	0.319 \| good	9.429 \| good	0.124 \| good
2025-07-22T11:00:00.000Z	60 \| moderate	13.986 \| fine	63.267 \| fine	22.777 \| good	0.495 \| good	8.91 \| good	0.177 \| good
2025-07-22T12:00:00.000Z	60 \| moderate	14.02 \| fine	63.84 \| fine	22.788 \| good	0.525 \| good	7.486 \| good	0.177 \| good
2025-07-22T13:00:00.000Z	66 \| moderate	17.45 \| fine	77.608 \| fine	24.917 \| good	0.317 \| good	7.005 \| good	0.177 \| good
2025-07-22T14:00:00.000Z	67 \| moderate	17.51 \| fine	78.01 \| fine	24.393 \| good	0.74 \| good	4.304 \| good	0.185 \| good
2025-07-22T15:00:00.000Z	75 \| moderate	22.141 \| fine	97.101 \| fine	27.023 \| good	0.831 \| good	5.141 \| good	0.226 \| good
2025-07-22T16:00:00.000Z	86 \| moderate	27.947 \| fine	121.133 \| fine	36.687 \| good	1.171 \| good	3.811 \| good	0.215 \| good
2025-07-22T17:00:00.000Z	86 \| moderate	27.92 \| fine	120.923 \| fine	43.666 \| good	1.083 \| good	2.246 \| good	0.215 \| good
2025-07-22T18:00:00.000Z	84 \| moderate	27.077 \| fine	117.832 \| fine	49.741 \| good	1.085 \| good	2.4 \| good	0.202 \| good
2025-07-22T19:00:00.000Z	82 \| moderate	25.606 \| fine	111.139 \| fine	56.717 \| fine	0.953 \| good	2.066 \| good	0.248 \| good
2025-07-22T20:00:00.000Z	90 \| moderate	23.722 \| fine	104.126 \| fine	66.893 \| fine	0.818 \| good	1.816 \| good	0.267 \| good
2025-07-22T21:00:00.000Z	112 \| sensitive	23.706 \| fine	103.271 \| fine	73.555 \| moderate	0.721 \| good	1.855 \| good	0.385 \| good
2025-07-22T22:00:00.000Z	115 \| sensitive	24.341 \| fine	105.082 \| fine	74.549 \| moderate	0.77 \| good	1.874 \| good	0.514 \| good
2025-07-22T23:00:00.000Z	100 \| moderate	24.478 \| fine	106.721 \| fine	70.028 \| fine	0.732 \| good	1.889 \| good	0.596 \| good
2025-07-23T00:00:00.000Z	112 \| sensitive	24.399 \| fine	106.89 \| fine	73.902 \| moderate	0.787 \| good	1.961 \| good	0.55 \| good
2025-07-23T01:00:00.000Z	101 \| sensitive	24.444 \| fine	106.872 \| fine	71.022 \| moderate	0.697 \| good	2.529 \| good	0.526 \| good
2025-07-23T02:00:00.000Z	87 \| moderate	23.893 \| fine	105.138 \| fine	66.133 \| fine	0.656 \| good	4.733 \| good	0.562 \| good
2025-07-23T03:00:00.000Z	77 \| moderate	22.803 \| fine	98.9 \| fine	54.151 \| good	0.569 \| good	5.606 \| good	0.573 \| good
2025-07-23T04:00:00.000Z	75 \| moderate	22.459 \| fine	98.147 \| fine	54.057 \| good	0.569 \| good	5.296 \| good	0.479 \| good
2025-07-23T05:00:00.000Z	75 \| moderate	22.442 \| fine	97.944 \| fine	48.527 \| good	0.554 \| good	4.269 \| good	0.479 \| good
2025-07-23T06:00:00.000Z	75 \| moderate	22.206 \| fine	97.919 \| fine	45.729 \| good	0.923 \| good	6.153 \| good	0.482 \| good
2025-07-23T07:00:00.000Z	73 \| moderate	21.282 \| fine	93.696 \| fine	45.629 \| good	2.396 \| good	5.179 \| good	0.458 \| good
2025-07-23T08:00:00.000Z	71 \| moderate	20.126 \| fine	88.112 \| fine	42.721 \| good	3.318 \| good	5.899 \| good	0.403 \| good
2025-07-23T09:00:00.000Z	69 \| moderate	19.343 \| fine	84.789 \| fine	43.393 \| good	2.369 \| good	5.441 \| good	0.403 \| good
2025-07-23T10:00:00.000Z	67 \| moderate	18.471 \| fine	80.556 \| fine	43.488 \| good	2.09 \| good	10.218 \| good	0.403 \| good
2025-07-23T11:00:00.000Z	67 \| moderate	17.695 \| fine	78.624 \| fine	40.944 \| good	1.333 \| good	8.139 \| good	0.403 \| good
2025-07-23T12:00:00.000Z	67 \| moderate	17.522 \| fine	77.176 \| fine	38.107 \| good	1.177 \| good	8.167 \| good	0.258 \| good
2025-07-23T13:00:00.000Z	66 \| moderate	17.496 \| fine	76.329 \| fine	39.463 \| good	1.624 \| good	10.781 \| good	0.285 \| good
2025-07-23T14:00:00.000Z	67 \| moderate	17.882 \| fine	78.862 \| fine	41.185 \| good	0.546 \| good	10.726 \| good	0.285 \| good
2025-07-23T15:00:00.000Z	69 \| moderate	18.549 \| fine	82.195 \| fine	40.713 \| good	0.482 \| good	9.815 \| good	0.285 \| good
2025-07-23T16:00:00.000Z	69 \| moderate	18.854 \| fine	82.665 \| fine	42.768 \| good	0.774 \| good	8.83 \| good	0.271 \| good
2025-07-23T17:00:00.000Z	69 \| moderate	18.881 \| fine	83.124 \| fine	45.698 \| good	0.717 \| good	8.664 \| good	0.232 \| good
2025-07-23T18:00:00.000Z	69 \| moderate	19.028 \| fine	84.593 \| fine	51.302 \| good	0.674 \| good	5.211 \| good	0.225 \| good
2025-07-23T19:00:00.000Z	69 \| moderate	19.427 \| fine	86.087 \| fine	49.087 \| good	0.561 \| good	3.73 \| good	0.225 \| good
2025-07-23T20:00:00.000Z	69 \| moderate	19.062 \| fine	84.242 \| fine	47.234 \| good	0.585 \| good	4.724 \| good	0.225 \| good
2025-07-23T21:00:00.000Z	69 \| moderate	18.526 \| fine	81.067 \| fine	46.28 \| good	0.665 \| good	4.192 \| good	0.224 \| good
2025-07-23T22:00:00.000Z	67 \| moderate	17.659 \| fine	79.069 \| fine	44.966 \| good	0.607 \| good	4.255 \| good	0.213 \| good
2025-07-23T23:00:00.000Z	66 \| moderate	16.645 \| fine	73.323 \| fine	43.233 \| good	0.527 \| good	3.85 \| good	0.18 \| good
2025-07-24T00:00:00.000Z	66 \| moderate	16.645 \| fine	73.323 \| fine	43.233 \| good	0.527 \| good	3.85 \| good	0.18 \| good
2025-07-22T17:00:00.000Z	67 \| moderate	18.304 \| fine	80.874 \| fine	51.75 \| good	2.229 \| good	2.951 \| good	0.259 \| good
2025-07-22T18:00:00.000Z	64 \| moderate	15.999 \| fine	71.216 \| fine	59.233 \| fine	2.06 \| good	1.85 \| good	0.247 \| good
2025-07-22T19:00:00.000Z	71 \| moderate	13.739 \| fine	62.1 \| fine	60.933 \| fine	2.005 \| good	1.899 \| good	0.245 \| good
2025-07-22T20:00:00.000Z	80 \| moderate	13.095 \| fine	58.998 \| fine	63.816 \| fine	1.949 \| good	1.947 \| good	0.243 \| good
2025-07-22T21:00:00.000Z	90 \| moderate	12.869 \| fine	58.1 \| fine	67.237 \| fine	1.894 \| good	1.996 \| good	0.241 \| good
2025-07-22T22:00:00.000Z	80 \| moderate	12.848 \| fine	57.209 \| fine	64.09 \| fine	1.774 \| good	2.67 \| good	0.241 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	14.729 \| fine	65.904 \| fine	58.613 \| fine	1.653 \| good	3.345 \| good	0.241 \| good
2025-07-23T00:00:00.000Z	60 \| moderate	14.137 \| fine	63.818 \| fine	50.999 \| good	1.533 \| good	4.019 \| good	0.24 \| good
2025-07-23T01:00:00.000Z	58 \| moderate	13.448 \| fine	60.246 \| fine	47.132 \| good	1.654 \| good	5.627 \| good	0.25 \| good
2025-07-23T02:00:00.000Z	56 \| moderate	11.965 \| good	53.378 \| good	39.999 \| good	1.774 \| good	7.235 \| good	0.259 \| good
2025-07-23T03:00:00.000Z	62 \| moderate	15.01 \| fine	67.093 \| fine	33.961 \| good	1.895 \| good	8.843 \| good	0.268 \| good
2025-07-23T04:00:00.000Z	66 \| moderate	17.204 \| fine	76.106 \| fine	31.843 \| good	1.96 \| good	8.479 \| good	0.265 \| good
2025-07-23T05:00:00.000Z	66 \| moderate	16.921 \| fine	75.084 \| fine	32.427 \| good	2.025 \| good	8.115 \| good	0.261 \| good
2025-07-23T06:00:00.000Z	64 \| moderate	16.129 \| fine	71.2 \| fine	31.962 \| good	2.089 \| good	7.752 \| good	0.257 \| good
2025-07-23T07:00:00.000Z	64 \| moderate	15.992 \| fine	70.991 \| fine	30.194 \| good	1.999 \| good	7.211 \| good	0.253 \| good
2025-07-23T08:00:00.000Z	64 \| moderate	15.91 \| fine	71.124 \| fine	28.728 \| good	1.909 \| good	6.671 \| good	0.248 \| good
2025-07-23T09:00:00.000Z	66 \| moderate	16.674 \| fine	73.209 \| fine	28.744 \| good	1.818 \| good	6.131 \| good	0.243 \| good
2025-07-23T10:00:00.000Z	69 \| moderate	18.846 \| fine	83.085 \| fine	26.813 \| good	1.794 \| good	5.974 \| good	0.243 \| good
2025-07-23T11:00:00.000Z	71 \| moderate	19.603 \| fine	86.665 \| fine	22.579 \| good	1.771 \| good	5.817 \| good	0.243 \| good
2025-07-23T12:00:00.000Z	77 \| moderate	23.426 \| fine	102.759 \| fine	25.879 \| good	1.747 \| good	5.66 \| good	0.242 \| good
2025-07-23T13:00:00.000Z	81 \| moderate	25.191 \| fine	110.424 \| fine	30.545 \| good	2.245 \| good	4.978 \| good	0.244 \| good
2025-07-23T14:00:00.000Z	77 \| moderate	23.487 \| fine	102.678 \| fine	33.773 \| good	2.742 \| good	4.296 \| good	0.246 \| good
2025-07-23T15:00:00.000Z	75 \| moderate	21.807 \| fine	95.657 \| fine	37.898 \| good	3.24 \| good	3.614 \| good	0.248 \| good
2025-07-23T16:00:00.000Z	69 \| moderate	19.377 \| fine	84.964 \| fine	40.519 \| good	3.149 \| good	2.87 \| good	0.236 \| good
2025-07-23T17:00:00.000Z	67 \| moderate	17.951 \| fine	79.088 \| fine	43.169 \| good	3.058 \| good	2.126 \| good	0.223 \| good
2025-07-23T18:00:00.000Z	69 \| moderate	19.421 \| fine	85.773 \| fine	45.302 \| good	2.967 \| good	1.383 \| good	0.211 \| good
2025-07-23T19:00:00.000Z	71 \| moderate	19.766 \| fine	87.042 \| fine	46.805 \| good	2.522 \| good	1.377 \| good	0.204 \| good
2025-07-23T20:00:00.000Z	71 \| moderate	19.671 \| fine	86.797 \| fine	47.13 \| good	2.078 \| good	1.371 \| good	0.197 \| good
2025-07-23T21:00:00.000Z	71 \| moderate	19.697 \| fine	86.797 \| fine	47.353 \| good	1.634 \| good	1.365 \| good	0.19 \| good
2025-07-23T22:00:00.000Z	71 \| moderate	20.428 \| fine	89.695 \| fine	48.063 \| good	1.566 \| good	2.149 \| good	0.195 \| good
2025-07-23T23:00:00.000Z	75 \| moderate	21.651 \| fine	94.833 \| fine	45.872 \| good	1.499 \| good	2.932 \| good	0.199 \| good
2025-07-24T00:00:00.000Z	67 \| moderate	17.818 \| fine	78.833 \| fine	41.12 \| good	1.432 \| good	3.716 \| good	0.204 \| good
2025-07-24T01:00:00.000Z	60 \| moderate	13.995 \| fine	62.84 \| fine	38.214 \| good	1.469 \| good	4.458 \| good	0.209 \| good
2025-07-24T02:00:00.000Z	58 \| moderate	13.126 \| fine	59.006 \| fine	35.99 \| good	1.505 \| good	5.199 \| good	0.213 \| good
2025-07-24T03:00:00.000Z	62 \| moderate	14.876 \| fine	66.795 \| fine	33.661 \| good	1.541 \| good	5.941 \| good	0.218 \| good
2025-07-24T04:00:00.000Z	66 \| moderate	16.976 \| fine	75.006 \| fine	32.878 \| good	1.42 \| good	5.76 \| good	0.215 \| good
2025-07-24T05:00:00.000Z	64 \| moderate	16.308 \| fine	72.832 \| fine	28.808 \| good	1.299 \| good	5.579 \| good	0.212 \| good
2025-07-24T06:00:00.000Z	64 \| moderate	15.764 \| fine	70.106 \| fine	30.612 \| good	1.178 \| good	5.398 \| good	0.209 \| good
2025-07-24T07:00:00.000Z	67 \| moderate	17.813 \| fine	79.218 \| fine	29.782 \| good	1.106 \| good	5.099 \| good	0.207 \| good
2025-07-24T08:00:00.000Z	69 \| moderate	19.065 \| fine	84.787 \| fine	28.382 \| good	1.034 \| good	4.801 \| good	0.206 \| good
2025-07-24T09:00:00.000Z	75 \| moderate	21.618 \| fine	94.927 \| fine	29.574 \| good	0.963 \| good	4.503 \| good	0.205 \| good
2025-07-24T10:00:00.000Z	69 \| moderate	19.467 \| fine	85.218 \| fine	27.754 \| good	1.177 \| good	4.508 \| good	0.206 \| good
2025-07-24T11:00:00.000Z	75 \| moderate	21.829 \| fine	95.092 \| fine	27.693 \| good	1.392 \| good	4.514 \| good	0.207 \| good
2025-07-24T12:00:00.000Z	75 \| moderate	22.388 \| fine	98.548 \| fine	26.838 \| good	1.606 \| good	4.52 \| good	0.208 \| good
2025-07-24T13:00:00.000Z	73 \| moderate	21.392 \| fine	94.55 \| fine	30.764 \| good	1.659 \| good	3.921 \| good	0.21 \| good
2025-07-24T14:00:00.000Z	69 \| moderate	18.7 \| fine	82.673 \| fine	37.018 \| good	1.713 \| good	3.323 \| good	0.212 \| good
2025-07-24T15:00:00.000Z	60 \| moderate	13.704 \| fine	61.174 \| fine	38.506 \| good	1.766 \| good	2.724 \| good	0.214 \| good
2025-07-24T16:00:00.000Z	56 \| moderate	11.763 \| good	51.698 \| good	41.102 \| good	1.495 \| good	2.23 \| good	0.204 \| good

Crystal Lake

Get reliable air quality data to drive your business

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

0.22ppm

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 04:00:00 on 2025-07-21.

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 2025-07-22.

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

The current air quality in Crystal Lake, Illinois is 86, categorized as Moderate 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 27.947 μg/m³.

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

The current PM₁₀ concentration at Crystal Lake, Illinois is 121.133 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 0.215 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 1.171 ppb.

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

The current ozone (O₃) concentration at Crystal Lake, Illinois is 36.687 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 3.811 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-22T01:00:00.000Z	75 \| moderate	21.965 \| fine	97.201 \| fine	44.66 \| good	1.543 \| good	2.949 \| good	0.303 \| good
2025-07-22T02:00:00.000Z	75 \| moderate	22.243 \| fine	98.254 \| fine	42.525 \| good	1.299 \| good	3.368 \| good	0.291 \| good
2025-07-22T03:00:00.000Z	54 \| moderate	10.622 \| good	47.085 \| good	28.438 \| good	1.084 \| good	7.426 \| good	0.262 \| good
2025-07-22T04:00:00.000Z	84 \| moderate	26.516 \| fine	116.259 \| fine	37.948 \| good	0.415 \| good	6.079 \| good	0.209 \| good
2025-07-22T05:00:00.000Z	82 \| moderate	25.593 \| fine	111.022 \| fine	35.64 \| good	0.532 \| good	7.77 \| good	0.162 \| good
2025-07-22T06:00:00.000Z	82 \| moderate	25.752 \| fine	111.896 \| fine	32.79 \| good	0.762 \| good	11.168 \| good	0.15 \| good
2025-07-22T07:00:00.000Z	75 \| moderate	21.605 \| fine	94.888 \| fine	28.994 \| good	0.633 \| good	8.909 \| good	0.124 \| good
2025-07-22T08:00:00.000Z	75 \| moderate	21.538 \| fine	94.642 \| fine	25.23 \| good	0.461 \| good	12.588 \| good	0.124 \| good
2025-07-22T09:00:00.000Z	62 \| moderate	15.35 \| fine	68.857 \| fine	25.826 \| good	0.275 \| good	11.613 \| good	0.113 \| good
2025-07-22T10:00:00.000Z	60 \| moderate	14.342 \| fine	65.448 \| fine	24.901 \| good	0.319 \| good	9.429 \| good	0.124 \| good
2025-07-22T11:00:00.000Z	60 \| moderate	13.986 \| fine	63.267 \| fine	22.777 \| good	0.495 \| good	8.91 \| good	0.177 \| good
2025-07-22T12:00:00.000Z	60 \| moderate	14.02 \| fine	63.84 \| fine	22.788 \| good	0.525 \| good	7.486 \| good	0.177 \| good
2025-07-22T13:00:00.000Z	66 \| moderate	17.45 \| fine	77.608 \| fine	24.917 \| good	0.317 \| good	7.005 \| good	0.177 \| good
2025-07-22T14:00:00.000Z	67 \| moderate	17.51 \| fine	78.01 \| fine	24.393 \| good	0.74 \| good	4.304 \| good	0.185 \| good
2025-07-22T15:00:00.000Z	75 \| moderate	22.141 \| fine	97.101 \| fine	27.023 \| good	0.831 \| good	5.141 \| good	0.226 \| good
2025-07-22T16:00:00.000Z	86 \| moderate	27.947 \| fine	121.133 \| fine	36.687 \| good	1.171 \| good	3.811 \| good	0.215 \| good
2025-07-22T17:00:00.000Z	86 \| moderate	27.92 \| fine	120.923 \| fine	43.666 \| good	1.083 \| good	2.246 \| good	0.215 \| good
2025-07-22T18:00:00.000Z	84 \| moderate	27.077 \| fine	117.832 \| fine	49.741 \| good	1.085 \| good	2.4 \| good	0.202 \| good
2025-07-22T19:00:00.000Z	82 \| moderate	25.606 \| fine	111.139 \| fine	56.717 \| fine	0.953 \| good	2.066 \| good	0.248 \| good
2025-07-22T20:00:00.000Z	90 \| moderate	23.722 \| fine	104.126 \| fine	66.893 \| fine	0.818 \| good	1.816 \| good	0.267 \| good
2025-07-22T21:00:00.000Z	112 \| sensitive	23.706 \| fine	103.271 \| fine	73.555 \| moderate	0.721 \| good	1.855 \| good	0.385 \| good
2025-07-22T22:00:00.000Z	115 \| sensitive	24.341 \| fine	105.082 \| fine	74.549 \| moderate	0.77 \| good	1.874 \| good	0.514 \| good
2025-07-22T23:00:00.000Z	100 \| moderate	24.478 \| fine	106.721 \| fine	70.028 \| fine	0.732 \| good	1.889 \| good	0.596 \| good
2025-07-23T00:00:00.000Z	112 \| sensitive	24.399 \| fine	106.89 \| fine	73.902 \| moderate	0.787 \| good	1.961 \| good	0.55 \| good
2025-07-23T01:00:00.000Z	101 \| sensitive	24.444 \| fine	106.872 \| fine	71.022 \| moderate	0.697 \| good	2.529 \| good	0.526 \| good
2025-07-23T02:00:00.000Z	87 \| moderate	23.893 \| fine	105.138 \| fine	66.133 \| fine	0.656 \| good	4.733 \| good	0.562 \| good
2025-07-23T03:00:00.000Z	77 \| moderate	22.803 \| fine	98.9 \| fine	54.151 \| good	0.569 \| good	5.606 \| good	0.573 \| good
2025-07-23T04:00:00.000Z	75 \| moderate	22.459 \| fine	98.147 \| fine	54.057 \| good	0.569 \| good	5.296 \| good	0.479 \| good
2025-07-23T05:00:00.000Z	75 \| moderate	22.442 \| fine	97.944 \| fine	48.527 \| good	0.554 \| good	4.269 \| good	0.479 \| good
2025-07-23T06:00:00.000Z	75 \| moderate	22.206 \| fine	97.919 \| fine	45.729 \| good	0.923 \| good	6.153 \| good	0.482 \| good
2025-07-23T07:00:00.000Z	73 \| moderate	21.282 \| fine	93.696 \| fine	45.629 \| good	2.396 \| good	5.179 \| good	0.458 \| good
2025-07-23T08:00:00.000Z	71 \| moderate	20.126 \| fine	88.112 \| fine	42.721 \| good	3.318 \| good	5.899 \| good	0.403 \| good
2025-07-23T09:00:00.000Z	69 \| moderate	19.343 \| fine	84.789 \| fine	43.393 \| good	2.369 \| good	5.441 \| good	0.403 \| good
2025-07-23T10:00:00.000Z	67 \| moderate	18.471 \| fine	80.556 \| fine	43.488 \| good	2.09 \| good	10.218 \| good	0.403 \| good
2025-07-23T11:00:00.000Z	67 \| moderate	17.695 \| fine	78.624 \| fine	40.944 \| good	1.333 \| good	8.139 \| good	0.403 \| good
2025-07-23T12:00:00.000Z	67 \| moderate	17.522 \| fine	77.176 \| fine	38.107 \| good	1.177 \| good	8.167 \| good	0.258 \| good
2025-07-23T13:00:00.000Z	66 \| moderate	17.496 \| fine	76.329 \| fine	39.463 \| good	1.624 \| good	10.781 \| good	0.285 \| good
2025-07-23T14:00:00.000Z	67 \| moderate	17.882 \| fine	78.862 \| fine	41.185 \| good	0.546 \| good	10.726 \| good	0.285 \| good
2025-07-23T15:00:00.000Z	69 \| moderate	18.549 \| fine	82.195 \| fine	40.713 \| good	0.482 \| good	9.815 \| good	0.285 \| good
2025-07-23T16:00:00.000Z	69 \| moderate	18.854 \| fine	82.665 \| fine	42.768 \| good	0.774 \| good	8.83 \| good	0.271 \| good
2025-07-23T17:00:00.000Z	69 \| moderate	18.881 \| fine	83.124 \| fine	45.698 \| good	0.717 \| good	8.664 \| good	0.232 \| good
2025-07-23T18:00:00.000Z	69 \| moderate	19.028 \| fine	84.593 \| fine	51.302 \| good	0.674 \| good	5.211 \| good	0.225 \| good
2025-07-23T19:00:00.000Z	69 \| moderate	19.427 \| fine	86.087 \| fine	49.087 \| good	0.561 \| good	3.73 \| good	0.225 \| good
2025-07-23T20:00:00.000Z	69 \| moderate	19.062 \| fine	84.242 \| fine	47.234 \| good	0.585 \| good	4.724 \| good	0.225 \| good
2025-07-23T21:00:00.000Z	69 \| moderate	18.526 \| fine	81.067 \| fine	46.28 \| good	0.665 \| good	4.192 \| good	0.224 \| good
2025-07-23T22:00:00.000Z	67 \| moderate	17.659 \| fine	79.069 \| fine	44.966 \| good	0.607 \| good	4.255 \| good	0.213 \| good
2025-07-23T23:00:00.000Z	66 \| moderate	16.645 \| fine	73.323 \| fine	43.233 \| good	0.527 \| good	3.85 \| good	0.18 \| good
2025-07-24T00:00:00.000Z	66 \| moderate	16.645 \| fine	73.323 \| fine	43.233 \| good	0.527 \| good	3.85 \| good	0.18 \| good
2025-07-22T17:00:00.000Z	67 \| moderate	18.304 \| fine	80.874 \| fine	51.75 \| good	2.229 \| good	2.951 \| good	0.259 \| good
2025-07-22T18:00:00.000Z	64 \| moderate	15.999 \| fine	71.216 \| fine	59.233 \| fine	2.06 \| good	1.85 \| good	0.247 \| good
2025-07-22T19:00:00.000Z	71 \| moderate	13.739 \| fine	62.1 \| fine	60.933 \| fine	2.005 \| good	1.899 \| good	0.245 \| good
2025-07-22T20:00:00.000Z	80 \| moderate	13.095 \| fine	58.998 \| fine	63.816 \| fine	1.949 \| good	1.947 \| good	0.243 \| good
2025-07-22T21:00:00.000Z	90 \| moderate	12.869 \| fine	58.1 \| fine	67.237 \| fine	1.894 \| good	1.996 \| good	0.241 \| good
2025-07-22T22:00:00.000Z	80 \| moderate	12.848 \| fine	57.209 \| fine	64.09 \| fine	1.774 \| good	2.67 \| good	0.241 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	14.729 \| fine	65.904 \| fine	58.613 \| fine	1.653 \| good	3.345 \| good	0.241 \| good
2025-07-23T00:00:00.000Z	60 \| moderate	14.137 \| fine	63.818 \| fine	50.999 \| good	1.533 \| good	4.019 \| good	0.24 \| good
2025-07-23T01:00:00.000Z	58 \| moderate	13.448 \| fine	60.246 \| fine	47.132 \| good	1.654 \| good	5.627 \| good	0.25 \| good
2025-07-23T02:00:00.000Z	56 \| moderate	11.965 \| good	53.378 \| good	39.999 \| good	1.774 \| good	7.235 \| good	0.259 \| good
2025-07-23T03:00:00.000Z	62 \| moderate	15.01 \| fine	67.093 \| fine	33.961 \| good	1.895 \| good	8.843 \| good	0.268 \| good
2025-07-23T04:00:00.000Z	66 \| moderate	17.204 \| fine	76.106 \| fine	31.843 \| good	1.96 \| good	8.479 \| good	0.265 \| good
2025-07-23T05:00:00.000Z	66 \| moderate	16.921 \| fine	75.084 \| fine	32.427 \| good	2.025 \| good	8.115 \| good	0.261 \| good
2025-07-23T06:00:00.000Z	64 \| moderate	16.129 \| fine	71.2 \| fine	31.962 \| good	2.089 \| good	7.752 \| good	0.257 \| good
2025-07-23T07:00:00.000Z	64 \| moderate	15.992 \| fine	70.991 \| fine	30.194 \| good	1.999 \| good	7.211 \| good	0.253 \| good
2025-07-23T08:00:00.000Z	64 \| moderate	15.91 \| fine	71.124 \| fine	28.728 \| good	1.909 \| good	6.671 \| good	0.248 \| good
2025-07-23T09:00:00.000Z	66 \| moderate	16.674 \| fine	73.209 \| fine	28.744 \| good	1.818 \| good	6.131 \| good	0.243 \| good
2025-07-23T10:00:00.000Z	69 \| moderate	18.846 \| fine	83.085 \| fine	26.813 \| good	1.794 \| good	5.974 \| good	0.243 \| good
2025-07-23T11:00:00.000Z	71 \| moderate	19.603 \| fine	86.665 \| fine	22.579 \| good	1.771 \| good	5.817 \| good	0.243 \| good
2025-07-23T12:00:00.000Z	77 \| moderate	23.426 \| fine	102.759 \| fine	25.879 \| good	1.747 \| good	5.66 \| good	0.242 \| good
2025-07-23T13:00:00.000Z	81 \| moderate	25.191 \| fine	110.424 \| fine	30.545 \| good	2.245 \| good	4.978 \| good	0.244 \| good
2025-07-23T14:00:00.000Z	77 \| moderate	23.487 \| fine	102.678 \| fine	33.773 \| good	2.742 \| good	4.296 \| good	0.246 \| good
2025-07-23T15:00:00.000Z	75 \| moderate	21.807 \| fine	95.657 \| fine	37.898 \| good	3.24 \| good	3.614 \| good	0.248 \| good
2025-07-23T16:00:00.000Z	69 \| moderate	19.377 \| fine	84.964 \| fine	40.519 \| good	3.149 \| good	2.87 \| good	0.236 \| good
2025-07-23T17:00:00.000Z	67 \| moderate	17.951 \| fine	79.088 \| fine	43.169 \| good	3.058 \| good	2.126 \| good	0.223 \| good
2025-07-23T18:00:00.000Z	69 \| moderate	19.421 \| fine	85.773 \| fine	45.302 \| good	2.967 \| good	1.383 \| good	0.211 \| good
2025-07-23T19:00:00.000Z	71 \| moderate	19.766 \| fine	87.042 \| fine	46.805 \| good	2.522 \| good	1.377 \| good	0.204 \| good
2025-07-23T20:00:00.000Z	71 \| moderate	19.671 \| fine	86.797 \| fine	47.13 \| good	2.078 \| good	1.371 \| good	0.197 \| good
2025-07-23T21:00:00.000Z	71 \| moderate	19.697 \| fine	86.797 \| fine	47.353 \| good	1.634 \| good	1.365 \| good	0.19 \| good
2025-07-23T22:00:00.000Z	71 \| moderate	20.428 \| fine	89.695 \| fine	48.063 \| good	1.566 \| good	2.149 \| good	0.195 \| good
2025-07-23T23:00:00.000Z	75 \| moderate	21.651 \| fine	94.833 \| fine	45.872 \| good	1.499 \| good	2.932 \| good	0.199 \| good
2025-07-24T00:00:00.000Z	67 \| moderate	17.818 \| fine	78.833 \| fine	41.12 \| good	1.432 \| good	3.716 \| good	0.204 \| good
2025-07-24T01:00:00.000Z	60 \| moderate	13.995 \| fine	62.84 \| fine	38.214 \| good	1.469 \| good	4.458 \| good	0.209 \| good
2025-07-24T02:00:00.000Z	58 \| moderate	13.126 \| fine	59.006 \| fine	35.99 \| good	1.505 \| good	5.199 \| good	0.213 \| good
2025-07-24T03:00:00.000Z	62 \| moderate	14.876 \| fine	66.795 \| fine	33.661 \| good	1.541 \| good	5.941 \| good	0.218 \| good
2025-07-24T04:00:00.000Z	66 \| moderate	16.976 \| fine	75.006 \| fine	32.878 \| good	1.42 \| good	5.76 \| good	0.215 \| good
2025-07-24T05:00:00.000Z	64 \| moderate	16.308 \| fine	72.832 \| fine	28.808 \| good	1.299 \| good	5.579 \| good	0.212 \| good
2025-07-24T06:00:00.000Z	64 \| moderate	15.764 \| fine	70.106 \| fine	30.612 \| good	1.178 \| good	5.398 \| good	0.209 \| good
2025-07-24T07:00:00.000Z	67 \| moderate	17.813 \| fine	79.218 \| fine	29.782 \| good	1.106 \| good	5.099 \| good	0.207 \| good
2025-07-24T08:00:00.000Z	69 \| moderate	19.065 \| fine	84.787 \| fine	28.382 \| good	1.034 \| good	4.801 \| good	0.206 \| good
2025-07-24T09:00:00.000Z	75 \| moderate	21.618 \| fine	94.927 \| fine	29.574 \| good	0.963 \| good	4.503 \| good	0.205 \| good
2025-07-24T10:00:00.000Z	69 \| moderate	19.467 \| fine	85.218 \| fine	27.754 \| good	1.177 \| good	4.508 \| good	0.206 \| good
2025-07-24T11:00:00.000Z	75 \| moderate	21.829 \| fine	95.092 \| fine	27.693 \| good	1.392 \| good	4.514 \| good	0.207 \| good
2025-07-24T12:00:00.000Z	75 \| moderate	22.388 \| fine	98.548 \| fine	26.838 \| good	1.606 \| good	4.52 \| good	0.208 \| good
2025-07-24T13:00:00.000Z	73 \| moderate	21.392 \| fine	94.55 \| fine	30.764 \| good	1.659 \| good	3.921 \| good	0.21 \| good
2025-07-24T14:00:00.000Z	69 \| moderate	18.7 \| fine	82.673 \| fine	37.018 \| good	1.713 \| good	3.323 \| good	0.212 \| good
2025-07-24T15:00:00.000Z	60 \| moderate	13.704 \| fine	61.174 \| fine	38.506 \| good	1.766 \| good	2.724 \| good	0.214 \| good
2025-07-24T16:00:00.000Z	56 \| moderate	11.763 \| good	51.698 \| good	41.102 \| good	1.495 \| good	2.23 \| good	0.204 \| 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?