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

The current PM10 concentration at Mchenry, Illinois is 15.881 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Mchenry, Illinois is 0.471 ppb.

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

The current ozone (O3) concentration at Mchenry, Illinois is 33.309 ppm.

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

The current nitrogen dioxide (NO2) concentration at Mchenry, Illinois is 3.669 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 3.802 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)

Good

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)

3.80 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.88 μg/m³

155

255

425

605+

Ozone (O₃)

33.31 ppb

201

201+

Sulfur Dioxide (SO₂)

0.47 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.67 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.17 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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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
2026-03-11T15:00:00.000Z	23 \| good	2.938 \| good	13.659 \| good	24.819 \| good	0.324 \| good	8.476 \| good	0.18 \| good
2026-03-11T16:00:00.000Z	23 \| good	2.32 \| good	8.257 \| good	24.538 \| good	0.234 \| good	6.862 \| good	0.224 \| good
2026-03-11T17:00:00.000Z	26 \| good	1.786 \| good	6.918 \| good	27.805 \| good	0.221 \| good	8.177 \| good	0.161 \| good
2026-03-11T18:00:00.000Z	24 \| good	1.797 \| good	8.682 \| good	25.801 \| good	0.301 \| good	7.061 \| good	0.161 \| good
2026-03-11T19:00:00.000Z	25 \| good	1.942 \| good	7.399 \| good	26.729 \| good	0.406 \| good	7.57 \| good	0.204 \| good
2026-03-11T20:00:00.000Z	22 \| good	1.953 \| good	7.587 \| good	23.765 \| good	0.332 \| good	6.778 \| good	0.204 \| good
2026-03-11T21:00:00.000Z	24 \| good	1.972 \| good	5.365 \| good	25.753 \| good	0.297 \| good	5.885 \| good	0.246 \| good
2026-03-11T22:00:00.000Z	27 \| good	1.434 \| good	5.138 \| good	29.476 \| good	0.268 \| good	5.268 \| good	0.204 \| good
2026-03-11T23:00:00.000Z	28 \| good	0.983 \| good	3.658 \| good	30.206 \| good	0.288 \| good	5.059 \| good	0.204 \| good
2026-03-12T00:00:00.000Z	28 \| good	1.386 \| good	5.109 \| good	29.786 \| good	0.264 \| good	4.732 \| good	0.204 \| good
2026-03-12T01:00:00.000Z	32 \| good	1.551 \| good	5.712 \| good	35.284 \| good	0.246 \| good	5.761 \| good	0.217 \| good
2026-03-12T02:00:00.000Z	32 \| good	1.869 \| good	7.928 \| good	35.179 \| good	0.389 \| good	6.637 \| good	0.204 \| good
2026-03-12T03:00:00.000Z	30 \| good	1.956 \| good	7.698 \| good	32.159 \| good	0.307 \| good	5.372 \| good	0.174 \| good
2026-03-12T04:00:00.000Z	29 \| good	2.388 \| good	8.859 \| good	31.453 \| good	0.322 \| good	6.828 \| good	0.204 \| good
2026-03-12T05:00:00.000Z	29 \| good	2.303 \| good	9.525 \| good	30.679 \| good	0.497 \| good	11.56 \| good	0.163 \| good
2026-03-12T06:00:00.000Z	29 \| good	2.286 \| good	8.639 \| good	30.576 \| good	2.551 \| good	8.094 \| good	0.161 \| good
2026-03-12T07:00:00.000Z	28 \| good	2.536 \| good	9.969 \| good	29.746 \| good	4.616 \| good	8.096 \| good	0.161 \| good
2026-03-12T08:00:00.000Z	27 \| good	2.709 \| good	10.925 \| good	29.335 \| good	1.972 \| good	5.965 \| good	0.161 \| good
2026-03-12T09:00:00.000Z	26 \| good	3.282 \| good	10.795 \| good	27.957 \| good	0.689 \| good	6.28 \| good	0.161 \| good
2026-03-12T10:00:00.000Z	28 \| good	3.579 \| good	16.637 \| good	29.545 \| good	0.432 \| good	8.845 \| good	0.204 \| good
2026-03-12T11:00:00.000Z	26 \| good	3.786 \| good	12.351 \| good	28.319 \| good	0.468 \| good	15.317 \| good	0.215 \| good
2026-03-12T12:00:00.000Z	24 \| good	3.857 \| good	15.315 \| good	25.723 \| good	0.407 \| good	17.898 \| good	0.269 \| good
2026-03-12T13:00:00.000Z	24 \| good	3.904 \| good	16.759 \| good	25.676 \| good	0.368 \| good	19.641 \| good	0.265 \| good
2026-03-12T14:00:00.000Z	27 \| good	5.097 \| good	20.859 \| good	16.216 \| good	0.425 \| good	17.098 \| good	0.285 \| good
2026-03-12T15:00:00.000Z	27 \| good	5.221 \| good	18.437 \| good	15.088 \| good	0.36 \| good	9.326 \| good	0.211 \| good
2026-03-12T16:00:00.000Z	27 \| good	5.451 \| good	23.383 \| good	26.703 \| good	0.374 \| good	7.354 \| good	0.204 \| good
2026-03-12T17:00:00.000Z	33 \| good	5.6 \| good	19.674 \| good	31.393 \| good	0.412 \| good	7.072 \| good	0.204 \| good
2026-03-12T18:00:00.000Z	31 \| good	5.111 \| good	21.703 \| good	33.341 \| good	0.45 \| good	6.274 \| good	0.204 \| good
2026-03-12T19:00:00.000Z	36 \| good	5.46 \| good	22.596 \| good	38.502 \| good	0.493 \| good	5.371 \| good	0.204 \| good
2026-03-12T20:00:00.000Z	37 \| good	5.536 \| good	21.292 \| good	39.91 \| good	1.151 \| good	5.235 \| good	0.246 \| good
2026-03-12T21:00:00.000Z	37 \| good	5.427 \| good	24.133 \| good	40.402 \| good	1.987 \| good	5.121 \| good	0.204 \| good
2026-03-12T22:00:00.000Z	39 \| good	4.971 \| good	20.633 \| good	42.185 \| good	1.499 \| good	4.525 \| good	0.246 \| good
2026-03-12T23:00:00.000Z	39 \| good	4.411 \| good	17.459 \| good	41.935 \| good	0.922 \| good	4.99 \| good	0.217 \| good
2026-03-13T00:00:00.000Z	35 \| good	4.726 \| good	23.437 \| good	37.861 \| good	0.385 \| good	5.798 \| good	0.256 \| good
2026-03-13T01:00:00.000Z	38 \| good	3.936 \| good	17.884 \| good	40.674 \| good	0.834 \| good	6.425 \| good	0.212 \| good
2026-03-13T02:00:00.000Z	36 \| good	3.287 \| good	14.275 \| good	39.051 \| good	0.324 \| good	6.881 \| good	0.212 \| good
2026-03-13T03:00:00.000Z	37 \| good	3.117 \| good	12.615 \| good	39.854 \| good	0.744 \| good	6.945 \| good	0.16 \| good
2026-03-13T04:00:00.000Z	33 \| good	2.97 \| good	12.03 \| good	35.991 \| good	0.949 \| good	3.747 \| good	0.16 \| good
2026-03-13T05:00:00.000Z	36 \| good	2.965 \| good	12.991 \| good	39.014 \| good	0.37 \| good	2.24 \| good	0.16 \| good
2026-03-13T06:00:00.000Z	36 \| good	3.367 \| good	12.439 \| good	38.901 \| good	1.267 \| good	2.298 \| good	0.16 \| good
2026-03-13T07:00:00.000Z	36 \| good	3.143 \| good	11.815 \| good	39.385 \| good	0.804 \| good	1.916 \| good	0.16 \| good
2026-03-13T08:00:00.000Z	36 \| good	3.548 \| good	15.664 \| good	39.295 \| good	0.588 \| good	2.252 \| good	0.16 \| good
2026-03-13T09:00:00.000Z	36 \| good	3.454 \| good	15.696 \| good	38.828 \| good	0.499 \| good	2.236 \| good	0.152 \| good
2026-03-13T10:00:00.000Z	35 \| good	3.67 \| good	15.845 \| good	37.855 \| good	0.498 \| good	2.774 \| good	0.152 \| good
2026-03-13T11:00:00.000Z	35 \| good	3.344 \| good	14.524 \| good	37.794 \| good	0.509 \| good	3.172 \| good	0.16 \| good
2026-03-13T12:00:00.000Z	34 \| good	3.445 \| good	14.544 \| good	36.921 \| good	0.449 \| good	3.308 \| good	0.16 \| good
2026-03-13T13:00:00.000Z	33 \| good	3.262 \| good	14.266 \| good	36.429 \| good	0.533 \| good	3.94 \| good	0.204 \| good
2026-03-13T14:00:00.000Z	31 \| good	3.802 \| good	15.881 \| good	33.309 \| good	0.471 \| good	3.669 \| good	0.174 \| good
2026-03-13T14:00:00.000Z	31 \| good	3.802 \| good	15.881 \| good	33.309 \| good	0.471 \| good	3.669 \| good	0.174 \| good
2026-03-13T15:00:00.000Z	28 \| good	3.152 \| good	13.871 \| good	29.892 \| good	0.206 \| good	1.396 \| good	0.152 \| good
2026-03-13T16:00:00.000Z	28 \| good	3.001 \| good	12 \| good	29.652 \| good	0.22 \| good	1.141 \| good	0.15 \| good
2026-03-13T17:00:00.000Z	31 \| good	3.31 \| good	14.936 \| good	32.903 \| good	0.234 \| good	0.885 \| good	0.148 \| good
2026-03-13T18:00:00.000Z	31 \| good	2.278 \| good	9.291 \| good	32.972 \| good	0.249 \| good	0.629 \| good	0.146 \| good
2026-03-13T19:00:00.000Z	32 \| good	2.26 \| good	9.291 \| good	34.931 \| good	0.249 \| good	0.656 \| good	0.144 \| good
2026-03-13T20:00:00.000Z	35 \| good	1.762 \| good	7.103 \| good	37.944 \| good	0.249 \| good	0.683 \| good	0.142 \| good
2026-03-13T21:00:00.000Z	36 \| good	1.605 \| good	6.33 \| good	39.027 \| good	0.25 \| good	0.71 \| good	0.141 \| good
2026-03-13T22:00:00.000Z	39 \| good	0.683 \| good	2.705 \| good	41.859 \| good	0.266 \| good	1.108 \| good	0.141 \| good
2026-03-13T23:00:00.000Z	36 \| good	1.4 \| good	5.771 \| good	38.581 \| good	0.282 \| good	1.507 \| good	0.141 \| good
2026-03-14T00:00:00.000Z	30 \| good	1.831 \| good	7.68 \| good	31.697 \| good	0.299 \| good	1.906 \| good	0.141 \| good
2026-03-14T01:00:00.000Z	27 \| good	1.613 \| good	6.73 \| good	28.735 \| good	0.296 \| good	1.875 \| good	0.145 \| good
2026-03-14T02:00:00.000Z	26 \| good	2.231 \| good	8.865 \| good	27.605 \| good	0.293 \| good	1.843 \| good	0.15 \| good
2026-03-14T03:00:00.000Z	26 \| good	2.301 \| good	9.672 \| good	28.119 \| good	0.29 \| good	1.812 \| good	0.154 \| good
2026-03-14T04:00:00.000Z	29 \| good	3.08 \| good	13.36 \| good	30.865 \| good	0.292 \| good	1.728 \| good	0.16 \| good
2026-03-14T05:00:00.000Z	27 \| good	3.56 \| good	15.706 \| good	29.468 \| good	0.294 \| good	1.643 \| good	0.165 \| good
2026-03-14T06:00:00.000Z	27 \| good	4.877 \| good	21.059 \| good	27.904 \| good	0.295 \| good	1.559 \| good	0.171 \| good
2026-03-14T07:00:00.000Z	27 \| good	4.584 \| good	19.793 \| good	26.715 \| good	0.33 \| good	1.704 \| good	0.172 \| good
2026-03-14T08:00:00.000Z	27 \| good	4.524 \| good	19.731 \| good	27.847 \| good	0.365 \| good	1.849 \| good	0.174 \| good
2026-03-14T09:00:00.000Z	25 \| good	4.06 \| good	17.664 \| good	26.925 \| good	0.4 \| good	1.994 \| good	0.176 \| good
2026-03-14T10:00:00.000Z	24 \| good	2.43 \| good	9.792 \| good	26.051 \| good	0.451 \| good	2.416 \| good	0.179 \| good
2026-03-14T11:00:00.000Z	24 \| good	0.643 \| good	2.21 \| good	25.698 \| good	0.503 \| good	2.838 \| good	0.182 \| good
2026-03-14T12:00:00.000Z	25 \| good	0.635 \| good	2.17 \| good	27.044 \| good	0.555 \| good	3.261 \| good	0.185 \| good
2026-03-14T13:00:00.000Z	27 \| good	0.575 \| good	2.139 \| good	28.709 \| good	0.574 \| good	3.048 \| good	0.184 \| good
2026-03-14T14:00:00.000Z	27 \| good	1.71 \| good	7.042 \| good	29.11 \| good	0.593 \| good	2.834 \| good	0.182 \| good
2026-03-14T15:00:00.000Z	27 \| good	2.11 \| good	8.414 \| good	28.739 \| good	0.612 \| good	2.621 \| good	0.181 \| good
2026-03-14T16:00:00.000Z	28 \| good	3.144 \| good	13.509 \| good	29.76 \| good	0.75 \| good	2.886 \| good	0.178 \| good
2026-03-14T17:00:00.000Z	27 \| good	3.39 \| good	14.865 \| good	29.302 \| good	0.888 \| good	3.151 \| good	0.176 \| good
2026-03-14T18:00:00.000Z	30 \| good	3.491 \| good	15.137 \| good	32.491 \| good	1.025 \| good	3.415 \| good	0.173 \| good
2026-03-14T19:00:00.000Z	31 \| good	4.676 \| good	20.114 \| good	33.78 \| good	1.235 \| good	4.307 \| good	0.174 \| good
2026-03-14T20:00:00.000Z	31 \| good	5.081 \| good	22.054 \| good	33.895 \| good	1.446 \| good	5.198 \| good	0.176 \| good
2026-03-14T21:00:00.000Z	38 \| good	6.921 \| good	30.737 \| good	34.692 \| good	1.656 \| good	6.089 \| good	0.177 \| good
2026-03-14T22:00:00.000Z	35 \| good	2.83 \| good	11.692 \| good	37.891 \| good	1.541 \| good	6.473 \| good	0.18 \| good
2026-03-14T23:00:00.000Z	34 \| good	0.869 \| good	3.508 \| good	37.431 \| good	1.427 \| good	6.858 \| good	0.183 \| good
2026-03-15T00:00:00.000Z	33 \| good	1.826 \| good	7.596 \| good	36.197 \| good	1.313 \| good	7.242 \| good	0.186 \| good
2026-03-15T01:00:00.000Z	27 \| good	1.959 \| good	8.037 \| good	29.472 \| good	1.143 \| good	6.814 \| good	0.186 \| good
2026-03-15T02:00:00.000Z	28 \| good	4.205 \| good	18.706 \| good	29.596 \| good	0.973 \| good	6.386 \| good	0.186 \| good
2026-03-15T03:00:00.000Z	31 \| good	3.708 \| good	16.061 \| good	32.93 \| good	0.803 \| good	5.959 \| good	0.186 \| good
2026-03-15T04:00:00.000Z	33 \| good	3.522 \| good	15.941 \| good	35.596 \| good	0.866 \| good	5.533 \| good	0.179 \| good
2026-03-15T05:00:00.000Z	34 \| good	4.742 \| good	20.865 \| good	37.09 \| good	0.929 \| good	5.108 \| good	0.173 \| good
2026-03-15T06:00:00.000Z	33 \| good	5.928 \| good	26.398 \| good	36.311 \| good	0.992 \| good	4.683 \| good	0.166 \| good
2026-03-15T07:00:00.000Z	36 \| good	4.452 \| good	19.021 \| good	38.83 \| good	1.236 \| good	4.382 \| good	0.165 \| good
2026-03-15T08:00:00.000Z	34 \| good	5.117 \| good	22.058 \| good	37.127 \| good	1.48 \| good	4.082 \| good	0.164 \| good
2026-03-15T09:00:00.000Z	33 \| good	5.244 \| good	22.745 \| good	36.123 \| good	1.724 \| good	3.781 \| good	0.162 \| good
2026-03-15T10:00:00.000Z	33 \| good	6.256 \| good	27.763 \| good	30.296 \| good	1.959 \| good	3.981 \| good	0.163 \| good
2026-03-15T11:00:00.000Z	28 \| good	5.188 \| good	22.061 \| good	29.744 \| good	2.195 \| good	4.18 \| good	0.163 \| good
2026-03-15T12:00:00.000Z	49 \| good	9.007 \| good	10.016 \| good	34.506 \| good	2.427 \| good	4.384 \| good	0.164 \| good
2026-03-15T13:00:00.000Z	44 \| good	7.839 \| good	8.491 \| good	34.74 \| good	2.278 \| good	5.349 \| good	0.17 \| good
2026-03-15T14:00:00.000Z	38 \| good	7.335 \| good	7.757 \| good	34.974 \| good	2.128 \| good	6.315 \| good	0.176 \| good

McHenry

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McHenry, Illinois air quality map: Track AQI near you

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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 11:00:00 on 2026-03-12.

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 04:00:00 on 2026-03-12.

What is the current air quality in Mchenry, Illinois?

The current air quality in Mchenry, Illinois is 31, categorized as Good based on real-time data.

What pollutant is the most common in Mchenry, Illinois?

The most common pollutant in Mchenry, Illinois is O3.

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 3.802 μg/m³.

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

The current PM₁₀ concentration at Mchenry, Illinois is 15.881 μg/m³.

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

The current carbon monoxide (CO) concentration at Mchenry, Illinois is 0.174 ppm.

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

The current sulfur dioxide (SO₂) concentration at Mchenry, Illinois is 0.471 ppb.

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

The current ozone (O₃) concentration at Mchenry, Illinois is 33.309 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Mchenry, Illinois is 3.669 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-11T15:00:00.000Z	23 \| good	2.938 \| good	13.659 \| good	24.819 \| good	0.324 \| good	8.476 \| good	0.18 \| good
2026-03-11T16:00:00.000Z	23 \| good	2.32 \| good	8.257 \| good	24.538 \| good	0.234 \| good	6.862 \| good	0.224 \| good
2026-03-11T17:00:00.000Z	26 \| good	1.786 \| good	6.918 \| good	27.805 \| good	0.221 \| good	8.177 \| good	0.161 \| good
2026-03-11T18:00:00.000Z	24 \| good	1.797 \| good	8.682 \| good	25.801 \| good	0.301 \| good	7.061 \| good	0.161 \| good
2026-03-11T19:00:00.000Z	25 \| good	1.942 \| good	7.399 \| good	26.729 \| good	0.406 \| good	7.57 \| good	0.204 \| good
2026-03-11T20:00:00.000Z	22 \| good	1.953 \| good	7.587 \| good	23.765 \| good	0.332 \| good	6.778 \| good	0.204 \| good
2026-03-11T21:00:00.000Z	24 \| good	1.972 \| good	5.365 \| good	25.753 \| good	0.297 \| good	5.885 \| good	0.246 \| good
2026-03-11T22:00:00.000Z	27 \| good	1.434 \| good	5.138 \| good	29.476 \| good	0.268 \| good	5.268 \| good	0.204 \| good
2026-03-11T23:00:00.000Z	28 \| good	0.983 \| good	3.658 \| good	30.206 \| good	0.288 \| good	5.059 \| good	0.204 \| good
2026-03-12T00:00:00.000Z	28 \| good	1.386 \| good	5.109 \| good	29.786 \| good	0.264 \| good	4.732 \| good	0.204 \| good
2026-03-12T01:00:00.000Z	32 \| good	1.551 \| good	5.712 \| good	35.284 \| good	0.246 \| good	5.761 \| good	0.217 \| good
2026-03-12T02:00:00.000Z	32 \| good	1.869 \| good	7.928 \| good	35.179 \| good	0.389 \| good	6.637 \| good	0.204 \| good
2026-03-12T03:00:00.000Z	30 \| good	1.956 \| good	7.698 \| good	32.159 \| good	0.307 \| good	5.372 \| good	0.174 \| good
2026-03-12T04:00:00.000Z	29 \| good	2.388 \| good	8.859 \| good	31.453 \| good	0.322 \| good	6.828 \| good	0.204 \| good
2026-03-12T05:00:00.000Z	29 \| good	2.303 \| good	9.525 \| good	30.679 \| good	0.497 \| good	11.56 \| good	0.163 \| good
2026-03-12T06:00:00.000Z	29 \| good	2.286 \| good	8.639 \| good	30.576 \| good	2.551 \| good	8.094 \| good	0.161 \| good
2026-03-12T07:00:00.000Z	28 \| good	2.536 \| good	9.969 \| good	29.746 \| good	4.616 \| good	8.096 \| good	0.161 \| good
2026-03-12T08:00:00.000Z	27 \| good	2.709 \| good	10.925 \| good	29.335 \| good	1.972 \| good	5.965 \| good	0.161 \| good
2026-03-12T09:00:00.000Z	26 \| good	3.282 \| good	10.795 \| good	27.957 \| good	0.689 \| good	6.28 \| good	0.161 \| good
2026-03-12T10:00:00.000Z	28 \| good	3.579 \| good	16.637 \| good	29.545 \| good	0.432 \| good	8.845 \| good	0.204 \| good
2026-03-12T11:00:00.000Z	26 \| good	3.786 \| good	12.351 \| good	28.319 \| good	0.468 \| good	15.317 \| good	0.215 \| good
2026-03-12T12:00:00.000Z	24 \| good	3.857 \| good	15.315 \| good	25.723 \| good	0.407 \| good	17.898 \| good	0.269 \| good
2026-03-12T13:00:00.000Z	24 \| good	3.904 \| good	16.759 \| good	25.676 \| good	0.368 \| good	19.641 \| good	0.265 \| good
2026-03-12T14:00:00.000Z	27 \| good	5.097 \| good	20.859 \| good	16.216 \| good	0.425 \| good	17.098 \| good	0.285 \| good
2026-03-12T15:00:00.000Z	27 \| good	5.221 \| good	18.437 \| good	15.088 \| good	0.36 \| good	9.326 \| good	0.211 \| good
2026-03-12T16:00:00.000Z	27 \| good	5.451 \| good	23.383 \| good	26.703 \| good	0.374 \| good	7.354 \| good	0.204 \| good
2026-03-12T17:00:00.000Z	33 \| good	5.6 \| good	19.674 \| good	31.393 \| good	0.412 \| good	7.072 \| good	0.204 \| good
2026-03-12T18:00:00.000Z	31 \| good	5.111 \| good	21.703 \| good	33.341 \| good	0.45 \| good	6.274 \| good	0.204 \| good
2026-03-12T19:00:00.000Z	36 \| good	5.46 \| good	22.596 \| good	38.502 \| good	0.493 \| good	5.371 \| good	0.204 \| good
2026-03-12T20:00:00.000Z	37 \| good	5.536 \| good	21.292 \| good	39.91 \| good	1.151 \| good	5.235 \| good	0.246 \| good
2026-03-12T21:00:00.000Z	37 \| good	5.427 \| good	24.133 \| good	40.402 \| good	1.987 \| good	5.121 \| good	0.204 \| good
2026-03-12T22:00:00.000Z	39 \| good	4.971 \| good	20.633 \| good	42.185 \| good	1.499 \| good	4.525 \| good	0.246 \| good
2026-03-12T23:00:00.000Z	39 \| good	4.411 \| good	17.459 \| good	41.935 \| good	0.922 \| good	4.99 \| good	0.217 \| good
2026-03-13T00:00:00.000Z	35 \| good	4.726 \| good	23.437 \| good	37.861 \| good	0.385 \| good	5.798 \| good	0.256 \| good
2026-03-13T01:00:00.000Z	38 \| good	3.936 \| good	17.884 \| good	40.674 \| good	0.834 \| good	6.425 \| good	0.212 \| good
2026-03-13T02:00:00.000Z	36 \| good	3.287 \| good	14.275 \| good	39.051 \| good	0.324 \| good	6.881 \| good	0.212 \| good
2026-03-13T03:00:00.000Z	37 \| good	3.117 \| good	12.615 \| good	39.854 \| good	0.744 \| good	6.945 \| good	0.16 \| good
2026-03-13T04:00:00.000Z	33 \| good	2.97 \| good	12.03 \| good	35.991 \| good	0.949 \| good	3.747 \| good	0.16 \| good
2026-03-13T05:00:00.000Z	36 \| good	2.965 \| good	12.991 \| good	39.014 \| good	0.37 \| good	2.24 \| good	0.16 \| good
2026-03-13T06:00:00.000Z	36 \| good	3.367 \| good	12.439 \| good	38.901 \| good	1.267 \| good	2.298 \| good	0.16 \| good
2026-03-13T07:00:00.000Z	36 \| good	3.143 \| good	11.815 \| good	39.385 \| good	0.804 \| good	1.916 \| good	0.16 \| good
2026-03-13T08:00:00.000Z	36 \| good	3.548 \| good	15.664 \| good	39.295 \| good	0.588 \| good	2.252 \| good	0.16 \| good
2026-03-13T09:00:00.000Z	36 \| good	3.454 \| good	15.696 \| good	38.828 \| good	0.499 \| good	2.236 \| good	0.152 \| good
2026-03-13T10:00:00.000Z	35 \| good	3.67 \| good	15.845 \| good	37.855 \| good	0.498 \| good	2.774 \| good	0.152 \| good
2026-03-13T11:00:00.000Z	35 \| good	3.344 \| good	14.524 \| good	37.794 \| good	0.509 \| good	3.172 \| good	0.16 \| good
2026-03-13T12:00:00.000Z	34 \| good	3.445 \| good	14.544 \| good	36.921 \| good	0.449 \| good	3.308 \| good	0.16 \| good
2026-03-13T13:00:00.000Z	33 \| good	3.262 \| good	14.266 \| good	36.429 \| good	0.533 \| good	3.94 \| good	0.204 \| good
2026-03-13T14:00:00.000Z	31 \| good	3.802 \| good	15.881 \| good	33.309 \| good	0.471 \| good	3.669 \| good	0.174 \| good
2026-03-13T14:00:00.000Z	31 \| good	3.802 \| good	15.881 \| good	33.309 \| good	0.471 \| good	3.669 \| good	0.174 \| good
2026-03-13T15:00:00.000Z	28 \| good	3.152 \| good	13.871 \| good	29.892 \| good	0.206 \| good	1.396 \| good	0.152 \| good
2026-03-13T16:00:00.000Z	28 \| good	3.001 \| good	12 \| good	29.652 \| good	0.22 \| good	1.141 \| good	0.15 \| good
2026-03-13T17:00:00.000Z	31 \| good	3.31 \| good	14.936 \| good	32.903 \| good	0.234 \| good	0.885 \| good	0.148 \| good
2026-03-13T18:00:00.000Z	31 \| good	2.278 \| good	9.291 \| good	32.972 \| good	0.249 \| good	0.629 \| good	0.146 \| good
2026-03-13T19:00:00.000Z	32 \| good	2.26 \| good	9.291 \| good	34.931 \| good	0.249 \| good	0.656 \| good	0.144 \| good
2026-03-13T20:00:00.000Z	35 \| good	1.762 \| good	7.103 \| good	37.944 \| good	0.249 \| good	0.683 \| good	0.142 \| good
2026-03-13T21:00:00.000Z	36 \| good	1.605 \| good	6.33 \| good	39.027 \| good	0.25 \| good	0.71 \| good	0.141 \| good
2026-03-13T22:00:00.000Z	39 \| good	0.683 \| good	2.705 \| good	41.859 \| good	0.266 \| good	1.108 \| good	0.141 \| good
2026-03-13T23:00:00.000Z	36 \| good	1.4 \| good	5.771 \| good	38.581 \| good	0.282 \| good	1.507 \| good	0.141 \| good
2026-03-14T00:00:00.000Z	30 \| good	1.831 \| good	7.68 \| good	31.697 \| good	0.299 \| good	1.906 \| good	0.141 \| good
2026-03-14T01:00:00.000Z	27 \| good	1.613 \| good	6.73 \| good	28.735 \| good	0.296 \| good	1.875 \| good	0.145 \| good
2026-03-14T02:00:00.000Z	26 \| good	2.231 \| good	8.865 \| good	27.605 \| good	0.293 \| good	1.843 \| good	0.15 \| good
2026-03-14T03:00:00.000Z	26 \| good	2.301 \| good	9.672 \| good	28.119 \| good	0.29 \| good	1.812 \| good	0.154 \| good
2026-03-14T04:00:00.000Z	29 \| good	3.08 \| good	13.36 \| good	30.865 \| good	0.292 \| good	1.728 \| good	0.16 \| good
2026-03-14T05:00:00.000Z	27 \| good	3.56 \| good	15.706 \| good	29.468 \| good	0.294 \| good	1.643 \| good	0.165 \| good
2026-03-14T06:00:00.000Z	27 \| good	4.877 \| good	21.059 \| good	27.904 \| good	0.295 \| good	1.559 \| good	0.171 \| good
2026-03-14T07:00:00.000Z	27 \| good	4.584 \| good	19.793 \| good	26.715 \| good	0.33 \| good	1.704 \| good	0.172 \| good
2026-03-14T08:00:00.000Z	27 \| good	4.524 \| good	19.731 \| good	27.847 \| good	0.365 \| good	1.849 \| good	0.174 \| good
2026-03-14T09:00:00.000Z	25 \| good	4.06 \| good	17.664 \| good	26.925 \| good	0.4 \| good	1.994 \| good	0.176 \| good
2026-03-14T10:00:00.000Z	24 \| good	2.43 \| good	9.792 \| good	26.051 \| good	0.451 \| good	2.416 \| good	0.179 \| good
2026-03-14T11:00:00.000Z	24 \| good	0.643 \| good	2.21 \| good	25.698 \| good	0.503 \| good	2.838 \| good	0.182 \| good
2026-03-14T12:00:00.000Z	25 \| good	0.635 \| good	2.17 \| good	27.044 \| good	0.555 \| good	3.261 \| good	0.185 \| good
2026-03-14T13:00:00.000Z	27 \| good	0.575 \| good	2.139 \| good	28.709 \| good	0.574 \| good	3.048 \| good	0.184 \| good
2026-03-14T14:00:00.000Z	27 \| good	1.71 \| good	7.042 \| good	29.11 \| good	0.593 \| good	2.834 \| good	0.182 \| good
2026-03-14T15:00:00.000Z	27 \| good	2.11 \| good	8.414 \| good	28.739 \| good	0.612 \| good	2.621 \| good	0.181 \| good
2026-03-14T16:00:00.000Z	28 \| good	3.144 \| good	13.509 \| good	29.76 \| good	0.75 \| good	2.886 \| good	0.178 \| good
2026-03-14T17:00:00.000Z	27 \| good	3.39 \| good	14.865 \| good	29.302 \| good	0.888 \| good	3.151 \| good	0.176 \| good
2026-03-14T18:00:00.000Z	30 \| good	3.491 \| good	15.137 \| good	32.491 \| good	1.025 \| good	3.415 \| good	0.173 \| good
2026-03-14T19:00:00.000Z	31 \| good	4.676 \| good	20.114 \| good	33.78 \| good	1.235 \| good	4.307 \| good	0.174 \| good
2026-03-14T20:00:00.000Z	31 \| good	5.081 \| good	22.054 \| good	33.895 \| good	1.446 \| good	5.198 \| good	0.176 \| good
2026-03-14T21:00:00.000Z	38 \| good	6.921 \| good	30.737 \| good	34.692 \| good	1.656 \| good	6.089 \| good	0.177 \| good
2026-03-14T22:00:00.000Z	35 \| good	2.83 \| good	11.692 \| good	37.891 \| good	1.541 \| good	6.473 \| good	0.18 \| good
2026-03-14T23:00:00.000Z	34 \| good	0.869 \| good	3.508 \| good	37.431 \| good	1.427 \| good	6.858 \| good	0.183 \| good
2026-03-15T00:00:00.000Z	33 \| good	1.826 \| good	7.596 \| good	36.197 \| good	1.313 \| good	7.242 \| good	0.186 \| good
2026-03-15T01:00:00.000Z	27 \| good	1.959 \| good	8.037 \| good	29.472 \| good	1.143 \| good	6.814 \| good	0.186 \| good
2026-03-15T02:00:00.000Z	28 \| good	4.205 \| good	18.706 \| good	29.596 \| good	0.973 \| good	6.386 \| good	0.186 \| good
2026-03-15T03:00:00.000Z	31 \| good	3.708 \| good	16.061 \| good	32.93 \| good	0.803 \| good	5.959 \| good	0.186 \| good
2026-03-15T04:00:00.000Z	33 \| good	3.522 \| good	15.941 \| good	35.596 \| good	0.866 \| good	5.533 \| good	0.179 \| good
2026-03-15T05:00:00.000Z	34 \| good	4.742 \| good	20.865 \| good	37.09 \| good	0.929 \| good	5.108 \| good	0.173 \| good
2026-03-15T06:00:00.000Z	33 \| good	5.928 \| good	26.398 \| good	36.311 \| good	0.992 \| good	4.683 \| good	0.166 \| good
2026-03-15T07:00:00.000Z	36 \| good	4.452 \| good	19.021 \| good	38.83 \| good	1.236 \| good	4.382 \| good	0.165 \| good
2026-03-15T08:00:00.000Z	34 \| good	5.117 \| good	22.058 \| good	37.127 \| good	1.48 \| good	4.082 \| good	0.164 \| good
2026-03-15T09:00:00.000Z	33 \| good	5.244 \| good	22.745 \| good	36.123 \| good	1.724 \| good	3.781 \| good	0.162 \| good
2026-03-15T10:00:00.000Z	33 \| good	6.256 \| good	27.763 \| good	30.296 \| good	1.959 \| good	3.981 \| good	0.163 \| good
2026-03-15T11:00:00.000Z	28 \| good	5.188 \| good	22.061 \| good	29.744 \| good	2.195 \| good	4.18 \| good	0.163 \| good
2026-03-15T12:00:00.000Z	49 \| good	9.007 \| good	10.016 \| good	34.506 \| good	2.427 \| good	4.384 \| good	0.164 \| good
2026-03-15T13:00:00.000Z	44 \| good	7.839 \| good	8.491 \| good	34.74 \| good	2.278 \| good	5.349 \| good	0.17 \| good
2026-03-15T14:00:00.000Z	38 \| good	7.335 \| good	7.757 \| good	34.974 \| good	2.128 \| good	6.315 \| good	0.176 \| 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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