What is the current concentration of PM10 in Mchenry, Illinois?

The current PM10 concentration at Mchenry, Illinois is 67.116 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Mchenry, Illinois is 1.007 ppb.

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

The current ozone (O3) concentration at Mchenry, Illinois is 26.911 ppm.

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

The current nitrogen dioxide (NO2) concentration at Mchenry, Illinois is 2.689 ppb.

McHenry, Illinois live air quality index now

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

The current PM2.5 concentration at Mchenry, Illinois is 16.305 μg/m3.

Stay updated with real-time air quality in McHenry, 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

McHenry, Illinois

Last updated: ... (Local time)

Major air pollutants in McHenry, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

16.30 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

67.12 μg/m³

155

255

425

605+

Ozone (O₃)

26.91 ppb

201

201+

Sulfur Dioxide (SO₂)

1.01 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.69 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.24 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

McHenry, Illinois

Get Live Pollen Counts

McHenry, Illinois

Scroll To Air Quality Map

Track live McHenry, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-22T02:00:00.000Z	58 \| moderate	12.913 \| fine	40.712 \| good	38.809 \| good	0.83 \| good	10.793 \| good	0.318 \| good
2026-08-22T03:00:00.000Z	60 \| moderate	14.315 \| fine	56.89 \| fine	23.142 \| good	0.711 \| good	11.321 \| good	0.278 \| good
2026-08-22T04:00:00.000Z	56 \| moderate	11.931 \| good	49.573 \| good	24.197 \| good	0.725 \| good	8.915 \| good	0.277 \| good
2026-08-22T05:00:00.000Z	52 \| moderate	9.653 \| good	33.944 \| good	27.158 \| good	0.751 \| good	9.587 \| good	0.249 \| good
2026-08-22T06:00:00.000Z	52 \| moderate	9.788 \| good	48.217 \| good	26.857 \| good	0.761 \| good	9.583 \| good	0.209 \| good
2026-08-22T07:00:00.000Z	49 \| good	9.089 \| good	38.198 \| good	25.484 \| good	0.711 \| good	7.925 \| good	0.198 \| good
2026-08-22T08:00:00.000Z	44 \| good	8.285 \| good	22.699 \| good	28.121 \| good	0.79 \| good	5.002 \| good	0.198 \| good
2026-08-22T09:00:00.000Z	38 \| good	6.853 \| good	24.948 \| good	24.303 \| good	0.769 \| good	4.237 \| good	0.238 \| good
2026-08-22T10:00:00.000Z	44 \| good	7.636 \| good	29.171 \| good	25.132 \| good	0.715 \| good	5.003 \| good	0.198 \| good
2026-08-22T11:00:00.000Z	38 \| good	7.486 \| good	30.996 \| good	23.518 \| good	0.824 \| good	4.302 \| good	0.198 \| good
2026-08-22T12:00:00.000Z	44 \| good	7.604 \| good	23.372 \| good	20.277 \| good	0.82 \| good	5.381 \| good	0.198 \| good
2026-08-22T13:00:00.000Z	38 \| good	7.297 \| good	22.498 \| good	20.783 \| good	0.789 \| good	5.195 \| good	0.198 \| good
2026-08-22T14:00:00.000Z	38 \| good	6.868 \| good	27.081 \| good	21.358 \| good	0.823 \| good	5.846 \| good	0.271 \| good
2026-08-22T15:00:00.000Z	38 \| good	7.198 \| good	27.604 \| good	25.333 \| good	0.818 \| good	4.177 \| good	0.238 \| good
2026-08-22T16:00:00.000Z	38 \| good	7.057 \| good	34.671 \| good	28.221 \| good	0.75 \| good	4.037 \| good	0.238 \| good
2026-08-22T17:00:00.000Z	38 \| good	7.126 \| good	30.073 \| good	29.674 \| good	0.704 \| good	3.384 \| good	0.227 \| good
2026-08-22T18:00:00.000Z	38 \| good	7.409 \| good	31.832 \| good	30.809 \| good	0.659 \| good	2.937 \| good	0.227 \| good
2026-08-22T19:00:00.000Z	38 \| good	7.183 \| good	29.832 \| good	32.835 \| good	0.635 \| good	3.096 \| good	0.187 \| good
2026-08-22T20:00:00.000Z	44 \| good	7.591 \| good	33.284 \| good	32.737 \| good	0.643 \| good	2.649 \| good	0.227 \| good
2026-08-22T21:00:00.000Z	44 \| good	7.892 \| good	35.177 \| good	36.345 \| good	0.802 \| good	2.62 \| good	0.187 \| good
2026-08-22T22:00:00.000Z	44 \| good	7.988 \| good	32.411 \| good	37.296 \| good	0.606 \| good	2.857 \| good	0.227 \| good
2026-08-22T23:00:00.000Z	44 \| good	7.719 \| good	32.597 \| good	35.308 \| good	0.586 \| good	2.463 \| good	0.227 \| good
2026-08-23T00:00:00.000Z	44 \| good	7.521 \| good	34.722 \| good	34.774 \| good	0.599 \| good	3.017 \| good	0.187 \| good
2026-08-23T01:00:00.000Z	38 \| good	6.964 \| good	27.202 \| good	33.982 \| good	0.612 \| good	4.294 \| good	0.267 \| good
2026-08-23T02:00:00.000Z	38 \| good	7.32 \| good	20.393 \| good	32.249 \| good	0.628 \| good	4.425 \| good	0.267 \| good
2026-08-23T03:00:00.000Z	18 \| good	0.94 \| good	3.493 \| good	19.277 \| good	0.237 \| good	4.582 \| good	0.167 \| good
2026-08-23T04:00:00.000Z	44 \| good	8.26 \| good	34.607 \| good	21.978 \| good	0.559 \| good	8.077 \| good	0.307 \| good
2026-08-23T05:00:00.000Z	44 \| good	8.185 \| good	35.041 \| good	21.488 \| good	0.659 \| good	8.159 \| good	0.267 \| good
2026-08-23T06:00:00.000Z	49 \| good	8.586 \| good	34.335 \| good	20.472 \| good	0.642 \| good	7.549 \| good	0.267 \| good
2026-08-23T07:00:00.000Z	44 \| good	7.847 \| good	35.344 \| good	18.414 \| good	0.619 \| good	6.427 \| good	0.267 \| good
2026-08-23T08:00:00.000Z	44 \| good	8.19 \| good	27.977 \| good	20.353 \| good	0.603 \| good	4.384 \| good	0.187 \| good
2026-08-23T09:00:00.000Z	44 \| good	8.483 \| good	38.849 \| good	16.63 \| good	0.648 \| good	4.115 \| good	0.187 \| good
2026-08-23T10:00:00.000Z	49 \| good	8.799 \| good	38.788 \| good	15.699 \| good	0.613 \| good	3.365 \| good	0.187 \| good
2026-08-23T11:00:00.000Z	44 \| good	8.02 \| good	25.929 \| good	19.17 \| good	0.695 \| good	3.733 \| good	0.187 \| good
2026-08-23T12:00:00.000Z	58 \| moderate	13.489 \| fine	36.372 \| good	15.91 \| good	0.644 \| good	4.349 \| good	0.187 \| good
2026-08-23T13:00:00.000Z	54 \| moderate	10.946 \| good	43.738 \| good	16.117 \| good	1.042 \| good	4.742 \| good	0.187 \| good
2026-08-23T14:00:00.000Z	64 \| moderate	16.193 \| fine	69.653 \| fine	18.223 \| good	1.592 \| good	4.103 \| good	0.264 \| good
2026-08-23T15:00:00.000Z	75 \| moderate	21.702 \| fine	77.262 \| fine	20.348 \| good	1.417 \| good	3.225 \| good	0.238 \| good
2026-08-23T16:00:00.000Z	75 \| moderate	22.453 \| fine	94.467 \| fine	21.195 \| good	1.036 \| good	2.859 \| good	0.25 \| good
2026-08-23T17:00:00.000Z	88 \| moderate	29.368 \| fine	114.446 \| fine	25.62 \| good	0.817 \| good	2.369 \| good	0.25 \| good
2026-08-23T18:00:00.000Z	79 \| moderate	23.912 \| fine	101.978 \| fine	26.349 \| good	0.708 \| good	2.291 \| good	0.199 \| good
2026-08-23T19:00:00.000Z	75 \| moderate	20.392 \| fine	103.327 \| fine	29.596 \| good	0.714 \| good	2.231 \| good	0.239 \| good
2026-08-23T20:00:00.000Z	67 \| moderate	18.337 \| fine	74.439 \| fine	27.987 \| good	0.714 \| good	2.2 \| good	0.227 \| good
2026-08-23T21:00:00.000Z	64 \| moderate	16.363 \| fine	65.099 \| fine	28.112 \| good	0.741 \| good	2.161 \| good	0.239 \| good
2026-08-23T22:00:00.000Z	64 \| moderate	15.564 \| fine	61.176 \| fine	28.796 \| good	1.935 \| good	2.283 \| good	0.227 \| good
2026-08-23T23:00:00.000Z	62 \| moderate	14.859 \| fine	67.534 \| fine	27.437 \| good	1.382 \| good	2.889 \| good	0.203 \| good
2026-08-24T00:00:00.000Z	60 \| moderate	14.28 \| fine	71.993 \| fine	27.283 \| good	1.269 \| good	3.487 \| good	0.203 \| good
2026-08-24T01:00:00.000Z	64 \| moderate	16.305 \| fine	67.116 \| fine	26.911 \| good	1.007 \| good	2.689 \| good	0.239 \| good
2026-08-24T01:00:00.000Z	64 \| moderate	16.305 \| fine	67.116 \| fine	26.911 \| good	1.007 \| good	2.689 \| good	0.239 \| good
2026-08-24T02:00:00.000Z	19 \| good	2.087 \| good	8.426 \| good	21.252 \| good	0.218 \| good	6.163 \| good	0.169 \| good
2026-08-24T03:00:00.000Z	22 \| good	3.674 \| good	16.281 \| good	17.537 \| good	0.24 \| good	7.087 \| good	0.173 \| good
2026-08-24T04:00:00.000Z	16 \| good	3.18 \| good	14.143 \| good	13.069 \| good	0.263 \| good	8.188 \| good	0.178 \| good
2026-08-24T05:00:00.000Z	16 \| good	2.641 \| good	10.725 \| good	11.862 \| good	0.282 \| good	9.458 \| good	0.185 \| good
2026-08-24T06:00:00.000Z	11 \| good	1.993 \| good	8.473 \| good	11.833 \| good	0.291 \| good	10.546 \| good	0.192 \| good
2026-08-24T07:00:00.000Z	11 \| good	1.674 \| good	6.809 \| good	10.872 \| good	0.302 \| good	11.634 \| good	0.197 \| good
2026-08-24T08:00:00.000Z	12 \| good	2.236 \| good	8.958 \| good	11.854 \| good	0.317 \| good	12.8 \| good	0.202 \| good
2026-08-24T09:00:00.000Z	13 \| good	1.969 \| good	7.898 \| good	10.557 \| good	0.335 \| good	13.998 \| good	0.209 \| good
2026-08-24T10:00:00.000Z	16 \| good	3.481 \| good	15.32 \| good	8.987 \| good	0.354 \| good	14.507 \| good	0.212 \| good
2026-08-24T11:00:00.000Z	22 \| good	3.508 \| good	15.237 \| good	8.89 \| good	0.376 \| good	14.268 \| good	0.213 \| good
2026-08-24T12:00:00.000Z	16 \| good	2.617 \| good	10.288 \| good	11.782 \| good	0.402 \| good	11.737 \| good	0.216 \| good
2026-08-24T13:00:00.000Z	17 \| good	2.567 \| good	10.279 \| good	18.473 \| good	0.403 \| good	7.522 \| good	0.212 \| good
2026-08-24T14:00:00.000Z	20 \| good	1.971 \| good	8.139 \| good	22.281 \| good	0.516 \| good	4.35 \| good	0.175 \| good
2026-08-24T15:00:00.000Z	22 \| good	2.952 \| good	12.129 \| good	24.271 \| good	0.513 \| good	2.814 \| good	0.16 \| good
2026-08-24T16:00:00.000Z	27 \| good	4.742 \| good	20.762 \| good	26.991 \| good	0.446 \| good	1.86 \| good	0.153 \| good
2026-08-24T17:00:00.000Z	27 \| good	4.811 \| good	20.762 \| good	27.914 \| good	0.374 \| good	1.214 \| good	0.15 \| good
2026-08-24T18:00:00.000Z	27 \| good	4.319 \| good	18.803 \| good	28.689 \| good	0.299 \| good	0.829 \| good	0.147 \| good
2026-08-24T19:00:00.000Z	33 \| good	5.628 \| good	24.549 \| good	29.686 \| good	0.25 \| good	0.668 \| good	0.145 \| good
2026-08-24T20:00:00.000Z	29 \| good	5.335 \| good	22.863 \| good	30.655 \| good	0.231 \| good	0.645 \| good	0.144 \| good
2026-08-24T21:00:00.000Z	31 \| good	4.728 \| good	20.745 \| good	32.696 \| good	0.224 \| good	0.688 \| good	0.144 \| good
2026-08-24T22:00:00.000Z	38 \| good	6.501 \| good	28.865 \| good	33.619 \| good	0.222 \| good	0.831 \| good	0.145 \| good
2026-08-24T23:00:00.000Z	38 \| good	7.418 \| good	32.801 \| good	35.519 \| good	0.222 \| good	1.42 \| good	0.15 \| good
2026-08-25T00:00:00.000Z	33 \| good	5.524 \| good	23.848 \| good	32.14 \| good	0.241 \| good	4.294 \| good	0.171 \| good
2026-08-25T01:00:00.000Z	33 \| good	5.829 \| good	25.336 \| good	23.182 \| good	0.308 \| good	8.942 \| good	0.198 \| good
2026-08-25T02:00:00.000Z	27 \| good	5.225 \| good	22.353 \| good	20.117 \| good	0.389 \| good	12.377 \| good	0.216 \| good
2026-08-25T03:00:00.000Z	33 \| good	5.713 \| good	24.68 \| good	16.365 \| good	0.461 \| good	14.324 \| good	0.224 \| good
2026-08-25T04:00:00.000Z	33 \| good	6.207 \| good	27.534 \| good	16.334 \| good	0.524 \| good	14.747 \| good	0.224 \| good
2026-08-25T05:00:00.000Z	44 \| good	7.985 \| good	35.147 \| good	15.01 \| good	0.582 \| good	14.093 \| good	0.219 \| good
2026-08-25T06:00:00.000Z	44 \| good	8.208 \| good	36.016 \| good	13.953 \| good	0.645 \| good	13.58 \| good	0.216 \| good
2026-08-25T07:00:00.000Z	49 \| good	9.075 \| good	40.375 \| good	14.008 \| good	0.735 \| good	13.715 \| good	0.214 \| good
2026-08-25T08:00:00.000Z	49 \| good	9.13 \| good	40.488 \| good	17.838 \| good	0.845 \| good	14.526 \| good	0.217 \| good
2026-08-25T09:00:00.000Z	49 \| good	9.077 \| good	39.687 \| good	16.532 \| good	0.979 \| good	15.696 \| good	0.223 \| good
2026-08-25T10:00:00.000Z	49 \| good	9.478 \| good	41.99 \| good	11.938 \| good	1.142 \| good	17.07 \| good	0.232 \| good
2026-08-25T11:00:00.000Z	49 \| good	8.539 \| good	37.679 \| good	9.443 \| good	1.287 \| good	18.464 \| good	0.244 \| good
2026-08-25T12:00:00.000Z	54 \| moderate	10.926 \| good	48.4 \| good	10.834 \| good	1.38 \| good	16.353 \| good	0.256 \| good
2026-08-25T13:00:00.000Z	56 \| moderate	12.259 \| fine	54.244 \| good	16.123 \| good	1.375 \| good	11.7 \| good	0.264 \| good
2026-08-25T14:00:00.000Z	56 \| moderate	12.352 \| fine	55.627 \| fine	22.424 \| good	1.835 \| good	9.787 \| good	0.255 \| good
2026-08-25T15:00:00.000Z	52 \| moderate	9.949 \| good	43.907 \| good	29.943 \| good	2.215 \| good	6.56 \| good	0.211 \| good
2026-08-25T16:00:00.000Z	49 \| good	9.347 \| good	41.777 \| good	36.901 \| good	1.562 \| good	3.615 \| good	0.182 \| good
2026-08-25T17:00:00.000Z	49 \| good	9.431 \| good	41.789 \| good	38.016 \| good	1.088 \| good	2.015 \| good	0.169 \| good
2026-08-25T18:00:00.000Z	44 \| good	8.463 \| good	36.877 \| good	37.852 \| good	0.921 \| good	1.397 \| good	0.166 \| good
2026-08-25T19:00:00.000Z	52 \| moderate	9.812 \| good	43.555 \| good	39.421 \| good	0.808 \| good	1.097 \| good	0.165 \| good
2026-08-25T20:00:00.000Z	49 \| good	9.422 \| good	42.306 \| good	40.349 \| good	0.703 \| good	0.976 \| good	0.163 \| good
2026-08-25T21:00:00.000Z	52 \| moderate	9.624 \| good	42.589 \| good	41.432 \| good	0.619 \| good	0.971 \| good	0.161 \| good
2026-08-25T22:00:00.000Z	54 \| moderate	10.701 \| good	47.37 \| good	40.661 \| good	0.556 \| good	1.082 \| good	0.16 \| good
2026-08-25T23:00:00.000Z	54 \| moderate	11.116 \| good	49.473 \| good	39.306 \| good	0.496 \| good	1.506 \| good	0.161 \| good
2026-08-26T00:00:00.000Z	42 \| good	6.885 \| good	7.097 \| good	45.18 \| good	0.458 \| good	3.314 \| good	0.173 \| good
2026-08-26T01:00:00.000Z	49 \| good	8.621 \| good	37.733 \| good	30.097 \| good	0.476 \| good	6.26 \| good	0.19 \| good

McHenry

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McHenry, Illinois air quality map: Track AQI near you

0.21ppm

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 Mchenry, Illinois updated?

The air quality for Mchenry, Illinois is updated every hour.

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

The worst air quality in Mchenry, Illinois in the last 24 hours was observed at 05:00:00 on 2026-08-23.

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

In the last 24 hrs, the best air quality in Mchenry, Illinois was observed at 03:00:00 on 2026-08-23.

What is the current air quality in Mchenry, Illinois?

The current air quality in Mchenry, Illinois is 64, categorized as Moderate based on real-time data.

What pollutant is the most common in Mchenry, Illinois?

The most common pollutant in Mchenry, Illinois is PM2.5.

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

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

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

The current PM_2.5 concentration at Mchenry, Illinois is 16.305 μg/m³.

What is the current concentration of PM₁₀ in Mchenry, Illinois?

The current PM₁₀ concentration at Mchenry, Illinois is 67.116 μg/m³.

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

The current carbon monoxide (CO) concentration at Mchenry, Illinois is 0.239 ppm.

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

The current sulfur dioxide (SO₂) concentration at Mchenry, Illinois is 1.007 ppb.

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

The current ozone (O₃) concentration at Mchenry, Illinois is 26.911 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Mchenry, Illinois is 2.689 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-22T02:00:00.000Z	58 \| moderate	12.913 \| fine	40.712 \| good	38.809 \| good	0.83 \| good	10.793 \| good	0.318 \| good
2026-08-22T03:00:00.000Z	60 \| moderate	14.315 \| fine	56.89 \| fine	23.142 \| good	0.711 \| good	11.321 \| good	0.278 \| good
2026-08-22T04:00:00.000Z	56 \| moderate	11.931 \| good	49.573 \| good	24.197 \| good	0.725 \| good	8.915 \| good	0.277 \| good
2026-08-22T05:00:00.000Z	52 \| moderate	9.653 \| good	33.944 \| good	27.158 \| good	0.751 \| good	9.587 \| good	0.249 \| good
2026-08-22T06:00:00.000Z	52 \| moderate	9.788 \| good	48.217 \| good	26.857 \| good	0.761 \| good	9.583 \| good	0.209 \| good
2026-08-22T07:00:00.000Z	49 \| good	9.089 \| good	38.198 \| good	25.484 \| good	0.711 \| good	7.925 \| good	0.198 \| good
2026-08-22T08:00:00.000Z	44 \| good	8.285 \| good	22.699 \| good	28.121 \| good	0.79 \| good	5.002 \| good	0.198 \| good
2026-08-22T09:00:00.000Z	38 \| good	6.853 \| good	24.948 \| good	24.303 \| good	0.769 \| good	4.237 \| good	0.238 \| good
2026-08-22T10:00:00.000Z	44 \| good	7.636 \| good	29.171 \| good	25.132 \| good	0.715 \| good	5.003 \| good	0.198 \| good
2026-08-22T11:00:00.000Z	38 \| good	7.486 \| good	30.996 \| good	23.518 \| good	0.824 \| good	4.302 \| good	0.198 \| good
2026-08-22T12:00:00.000Z	44 \| good	7.604 \| good	23.372 \| good	20.277 \| good	0.82 \| good	5.381 \| good	0.198 \| good
2026-08-22T13:00:00.000Z	38 \| good	7.297 \| good	22.498 \| good	20.783 \| good	0.789 \| good	5.195 \| good	0.198 \| good
2026-08-22T14:00:00.000Z	38 \| good	6.868 \| good	27.081 \| good	21.358 \| good	0.823 \| good	5.846 \| good	0.271 \| good
2026-08-22T15:00:00.000Z	38 \| good	7.198 \| good	27.604 \| good	25.333 \| good	0.818 \| good	4.177 \| good	0.238 \| good
2026-08-22T16:00:00.000Z	38 \| good	7.057 \| good	34.671 \| good	28.221 \| good	0.75 \| good	4.037 \| good	0.238 \| good
2026-08-22T17:00:00.000Z	38 \| good	7.126 \| good	30.073 \| good	29.674 \| good	0.704 \| good	3.384 \| good	0.227 \| good
2026-08-22T18:00:00.000Z	38 \| good	7.409 \| good	31.832 \| good	30.809 \| good	0.659 \| good	2.937 \| good	0.227 \| good
2026-08-22T19:00:00.000Z	38 \| good	7.183 \| good	29.832 \| good	32.835 \| good	0.635 \| good	3.096 \| good	0.187 \| good
2026-08-22T20:00:00.000Z	44 \| good	7.591 \| good	33.284 \| good	32.737 \| good	0.643 \| good	2.649 \| good	0.227 \| good
2026-08-22T21:00:00.000Z	44 \| good	7.892 \| good	35.177 \| good	36.345 \| good	0.802 \| good	2.62 \| good	0.187 \| good
2026-08-22T22:00:00.000Z	44 \| good	7.988 \| good	32.411 \| good	37.296 \| good	0.606 \| good	2.857 \| good	0.227 \| good
2026-08-22T23:00:00.000Z	44 \| good	7.719 \| good	32.597 \| good	35.308 \| good	0.586 \| good	2.463 \| good	0.227 \| good
2026-08-23T00:00:00.000Z	44 \| good	7.521 \| good	34.722 \| good	34.774 \| good	0.599 \| good	3.017 \| good	0.187 \| good
2026-08-23T01:00:00.000Z	38 \| good	6.964 \| good	27.202 \| good	33.982 \| good	0.612 \| good	4.294 \| good	0.267 \| good
2026-08-23T02:00:00.000Z	38 \| good	7.32 \| good	20.393 \| good	32.249 \| good	0.628 \| good	4.425 \| good	0.267 \| good
2026-08-23T03:00:00.000Z	18 \| good	0.94 \| good	3.493 \| good	19.277 \| good	0.237 \| good	4.582 \| good	0.167 \| good
2026-08-23T04:00:00.000Z	44 \| good	8.26 \| good	34.607 \| good	21.978 \| good	0.559 \| good	8.077 \| good	0.307 \| good
2026-08-23T05:00:00.000Z	44 \| good	8.185 \| good	35.041 \| good	21.488 \| good	0.659 \| good	8.159 \| good	0.267 \| good
2026-08-23T06:00:00.000Z	49 \| good	8.586 \| good	34.335 \| good	20.472 \| good	0.642 \| good	7.549 \| good	0.267 \| good
2026-08-23T07:00:00.000Z	44 \| good	7.847 \| good	35.344 \| good	18.414 \| good	0.619 \| good	6.427 \| good	0.267 \| good
2026-08-23T08:00:00.000Z	44 \| good	8.19 \| good	27.977 \| good	20.353 \| good	0.603 \| good	4.384 \| good	0.187 \| good
2026-08-23T09:00:00.000Z	44 \| good	8.483 \| good	38.849 \| good	16.63 \| good	0.648 \| good	4.115 \| good	0.187 \| good
2026-08-23T10:00:00.000Z	49 \| good	8.799 \| good	38.788 \| good	15.699 \| good	0.613 \| good	3.365 \| good	0.187 \| good
2026-08-23T11:00:00.000Z	44 \| good	8.02 \| good	25.929 \| good	19.17 \| good	0.695 \| good	3.733 \| good	0.187 \| good
2026-08-23T12:00:00.000Z	58 \| moderate	13.489 \| fine	36.372 \| good	15.91 \| good	0.644 \| good	4.349 \| good	0.187 \| good
2026-08-23T13:00:00.000Z	54 \| moderate	10.946 \| good	43.738 \| good	16.117 \| good	1.042 \| good	4.742 \| good	0.187 \| good
2026-08-23T14:00:00.000Z	64 \| moderate	16.193 \| fine	69.653 \| fine	18.223 \| good	1.592 \| good	4.103 \| good	0.264 \| good
2026-08-23T15:00:00.000Z	75 \| moderate	21.702 \| fine	77.262 \| fine	20.348 \| good	1.417 \| good	3.225 \| good	0.238 \| good
2026-08-23T16:00:00.000Z	75 \| moderate	22.453 \| fine	94.467 \| fine	21.195 \| good	1.036 \| good	2.859 \| good	0.25 \| good
2026-08-23T17:00:00.000Z	88 \| moderate	29.368 \| fine	114.446 \| fine	25.62 \| good	0.817 \| good	2.369 \| good	0.25 \| good
2026-08-23T18:00:00.000Z	79 \| moderate	23.912 \| fine	101.978 \| fine	26.349 \| good	0.708 \| good	2.291 \| good	0.199 \| good
2026-08-23T19:00:00.000Z	75 \| moderate	20.392 \| fine	103.327 \| fine	29.596 \| good	0.714 \| good	2.231 \| good	0.239 \| good
2026-08-23T20:00:00.000Z	67 \| moderate	18.337 \| fine	74.439 \| fine	27.987 \| good	0.714 \| good	2.2 \| good	0.227 \| good
2026-08-23T21:00:00.000Z	64 \| moderate	16.363 \| fine	65.099 \| fine	28.112 \| good	0.741 \| good	2.161 \| good	0.239 \| good
2026-08-23T22:00:00.000Z	64 \| moderate	15.564 \| fine	61.176 \| fine	28.796 \| good	1.935 \| good	2.283 \| good	0.227 \| good
2026-08-23T23:00:00.000Z	62 \| moderate	14.859 \| fine	67.534 \| fine	27.437 \| good	1.382 \| good	2.889 \| good	0.203 \| good
2026-08-24T00:00:00.000Z	60 \| moderate	14.28 \| fine	71.993 \| fine	27.283 \| good	1.269 \| good	3.487 \| good	0.203 \| good
2026-08-24T01:00:00.000Z	64 \| moderate	16.305 \| fine	67.116 \| fine	26.911 \| good	1.007 \| good	2.689 \| good	0.239 \| good
2026-08-24T01:00:00.000Z	64 \| moderate	16.305 \| fine	67.116 \| fine	26.911 \| good	1.007 \| good	2.689 \| good	0.239 \| good
2026-08-24T02:00:00.000Z	19 \| good	2.087 \| good	8.426 \| good	21.252 \| good	0.218 \| good	6.163 \| good	0.169 \| good
2026-08-24T03:00:00.000Z	22 \| good	3.674 \| good	16.281 \| good	17.537 \| good	0.24 \| good	7.087 \| good	0.173 \| good
2026-08-24T04:00:00.000Z	16 \| good	3.18 \| good	14.143 \| good	13.069 \| good	0.263 \| good	8.188 \| good	0.178 \| good
2026-08-24T05:00:00.000Z	16 \| good	2.641 \| good	10.725 \| good	11.862 \| good	0.282 \| good	9.458 \| good	0.185 \| good
2026-08-24T06:00:00.000Z	11 \| good	1.993 \| good	8.473 \| good	11.833 \| good	0.291 \| good	10.546 \| good	0.192 \| good
2026-08-24T07:00:00.000Z	11 \| good	1.674 \| good	6.809 \| good	10.872 \| good	0.302 \| good	11.634 \| good	0.197 \| good
2026-08-24T08:00:00.000Z	12 \| good	2.236 \| good	8.958 \| good	11.854 \| good	0.317 \| good	12.8 \| good	0.202 \| good
2026-08-24T09:00:00.000Z	13 \| good	1.969 \| good	7.898 \| good	10.557 \| good	0.335 \| good	13.998 \| good	0.209 \| good
2026-08-24T10:00:00.000Z	16 \| good	3.481 \| good	15.32 \| good	8.987 \| good	0.354 \| good	14.507 \| good	0.212 \| good
2026-08-24T11:00:00.000Z	22 \| good	3.508 \| good	15.237 \| good	8.89 \| good	0.376 \| good	14.268 \| good	0.213 \| good
2026-08-24T12:00:00.000Z	16 \| good	2.617 \| good	10.288 \| good	11.782 \| good	0.402 \| good	11.737 \| good	0.216 \| good
2026-08-24T13:00:00.000Z	17 \| good	2.567 \| good	10.279 \| good	18.473 \| good	0.403 \| good	7.522 \| good	0.212 \| good
2026-08-24T14:00:00.000Z	20 \| good	1.971 \| good	8.139 \| good	22.281 \| good	0.516 \| good	4.35 \| good	0.175 \| good
2026-08-24T15:00:00.000Z	22 \| good	2.952 \| good	12.129 \| good	24.271 \| good	0.513 \| good	2.814 \| good	0.16 \| good
2026-08-24T16:00:00.000Z	27 \| good	4.742 \| good	20.762 \| good	26.991 \| good	0.446 \| good	1.86 \| good	0.153 \| good
2026-08-24T17:00:00.000Z	27 \| good	4.811 \| good	20.762 \| good	27.914 \| good	0.374 \| good	1.214 \| good	0.15 \| good
2026-08-24T18:00:00.000Z	27 \| good	4.319 \| good	18.803 \| good	28.689 \| good	0.299 \| good	0.829 \| good	0.147 \| good
2026-08-24T19:00:00.000Z	33 \| good	5.628 \| good	24.549 \| good	29.686 \| good	0.25 \| good	0.668 \| good	0.145 \| good
2026-08-24T20:00:00.000Z	29 \| good	5.335 \| good	22.863 \| good	30.655 \| good	0.231 \| good	0.645 \| good	0.144 \| good
2026-08-24T21:00:00.000Z	31 \| good	4.728 \| good	20.745 \| good	32.696 \| good	0.224 \| good	0.688 \| good	0.144 \| good
2026-08-24T22:00:00.000Z	38 \| good	6.501 \| good	28.865 \| good	33.619 \| good	0.222 \| good	0.831 \| good	0.145 \| good
2026-08-24T23:00:00.000Z	38 \| good	7.418 \| good	32.801 \| good	35.519 \| good	0.222 \| good	1.42 \| good	0.15 \| good
2026-08-25T00:00:00.000Z	33 \| good	5.524 \| good	23.848 \| good	32.14 \| good	0.241 \| good	4.294 \| good	0.171 \| good
2026-08-25T01:00:00.000Z	33 \| good	5.829 \| good	25.336 \| good	23.182 \| good	0.308 \| good	8.942 \| good	0.198 \| good
2026-08-25T02:00:00.000Z	27 \| good	5.225 \| good	22.353 \| good	20.117 \| good	0.389 \| good	12.377 \| good	0.216 \| good
2026-08-25T03:00:00.000Z	33 \| good	5.713 \| good	24.68 \| good	16.365 \| good	0.461 \| good	14.324 \| good	0.224 \| good
2026-08-25T04:00:00.000Z	33 \| good	6.207 \| good	27.534 \| good	16.334 \| good	0.524 \| good	14.747 \| good	0.224 \| good
2026-08-25T05:00:00.000Z	44 \| good	7.985 \| good	35.147 \| good	15.01 \| good	0.582 \| good	14.093 \| good	0.219 \| good
2026-08-25T06:00:00.000Z	44 \| good	8.208 \| good	36.016 \| good	13.953 \| good	0.645 \| good	13.58 \| good	0.216 \| good
2026-08-25T07:00:00.000Z	49 \| good	9.075 \| good	40.375 \| good	14.008 \| good	0.735 \| good	13.715 \| good	0.214 \| good
2026-08-25T08:00:00.000Z	49 \| good	9.13 \| good	40.488 \| good	17.838 \| good	0.845 \| good	14.526 \| good	0.217 \| good
2026-08-25T09:00:00.000Z	49 \| good	9.077 \| good	39.687 \| good	16.532 \| good	0.979 \| good	15.696 \| good	0.223 \| good
2026-08-25T10:00:00.000Z	49 \| good	9.478 \| good	41.99 \| good	11.938 \| good	1.142 \| good	17.07 \| good	0.232 \| good
2026-08-25T11:00:00.000Z	49 \| good	8.539 \| good	37.679 \| good	9.443 \| good	1.287 \| good	18.464 \| good	0.244 \| good
2026-08-25T12:00:00.000Z	54 \| moderate	10.926 \| good	48.4 \| good	10.834 \| good	1.38 \| good	16.353 \| good	0.256 \| good
2026-08-25T13:00:00.000Z	56 \| moderate	12.259 \| fine	54.244 \| good	16.123 \| good	1.375 \| good	11.7 \| good	0.264 \| good
2026-08-25T14:00:00.000Z	56 \| moderate	12.352 \| fine	55.627 \| fine	22.424 \| good	1.835 \| good	9.787 \| good	0.255 \| good
2026-08-25T15:00:00.000Z	52 \| moderate	9.949 \| good	43.907 \| good	29.943 \| good	2.215 \| good	6.56 \| good	0.211 \| good
2026-08-25T16:00:00.000Z	49 \| good	9.347 \| good	41.777 \| good	36.901 \| good	1.562 \| good	3.615 \| good	0.182 \| good
2026-08-25T17:00:00.000Z	49 \| good	9.431 \| good	41.789 \| good	38.016 \| good	1.088 \| good	2.015 \| good	0.169 \| good
2026-08-25T18:00:00.000Z	44 \| good	8.463 \| good	36.877 \| good	37.852 \| good	0.921 \| good	1.397 \| good	0.166 \| good
2026-08-25T19:00:00.000Z	52 \| moderate	9.812 \| good	43.555 \| good	39.421 \| good	0.808 \| good	1.097 \| good	0.165 \| good
2026-08-25T20:00:00.000Z	49 \| good	9.422 \| good	42.306 \| good	40.349 \| good	0.703 \| good	0.976 \| good	0.163 \| good
2026-08-25T21:00:00.000Z	52 \| moderate	9.624 \| good	42.589 \| good	41.432 \| good	0.619 \| good	0.971 \| good	0.161 \| good
2026-08-25T22:00:00.000Z	54 \| moderate	10.701 \| good	47.37 \| good	40.661 \| good	0.556 \| good	1.082 \| good	0.16 \| good
2026-08-25T23:00:00.000Z	54 \| moderate	11.116 \| good	49.473 \| good	39.306 \| good	0.496 \| good	1.506 \| good	0.161 \| good
2026-08-26T00:00:00.000Z	42 \| good	6.885 \| good	7.097 \| good	45.18 \| good	0.458 \| good	3.314 \| good	0.173 \| good
2026-08-26T01:00:00.000Z	49 \| good	8.621 \| good	37.733 \| good	30.097 \| good	0.476 \| good	6.26 \| good	0.19 \| good

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Major air pollutants in McHenry, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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