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

The current PM10 concentration at Mchenry, Illinois is 7.698 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Mchenry, Illinois is 0.307 ppb.

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

The current ozone (O3) concentration at Mchenry, Illinois is 32.159 ppm.

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

The current nitrogen dioxide (NO2) concentration at Mchenry, Illinois is 5.372 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 1.956 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)

1.96 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

7.70 μg/m³

155

255

425

605+

Ozone (O₃)

32.16 ppb

201

201+

Sulfur Dioxide (SO₂)

0.31 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.37 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
2026-03-10T04:00:00.000Z	56 \| moderate	12.301 \| fine	55.856 \| fine	28.195 \| good	0.634 \| good	14.364 \| good	0.326 \| good
2026-03-10T05:00:00.000Z	49 \| good	8.97 \| good	38.126 \| good	27.062 \| good	0.583 \| good	12.16 \| good	0.339 \| good
2026-03-10T06:00:00.000Z	52 \| moderate	9.708 \| good	42.047 \| good	24.308 \| good	0.468 \| good	12.056 \| good	0.277 \| good
2026-03-10T07:00:00.000Z	49 \| good	8.654 \| good	38.631 \| good	19.011 \| good	0.47 \| good	5.231 \| good	0.277 \| good
2026-03-10T08:00:00.000Z	49 \| good	9.154 \| good	40.051 \| good	21.242 \| good	0.332 \| good	4.273 \| good	0.167 \| good
2026-03-10T09:00:00.000Z	44 \| good	8.383 \| good	29.39 \| good	16.596 \| good	0.336 \| good	3.972 \| good	0.174 \| good
2026-03-10T10:00:00.000Z	44 \| good	8.147 \| good	33.431 \| good	16.318 \| good	0.358 \| good	3.965 \| good	0.178 \| good
2026-03-10T11:00:00.000Z	44 \| good	8.484 \| good	25.513 \| good	13.657 \| good	0.338 \| good	6.887 \| good	0.232 \| good
2026-03-10T12:00:00.000Z	38 \| good	7.188 \| good	32.028 \| good	15.839 \| good	0.352 \| good	8.008 \| good	0.271 \| good
2026-03-10T13:00:00.000Z	33 \| good	5.566 \| good	12.587 \| good	28.39 \| good	0.326 \| good	7.626 \| good	0.271 \| good
2026-03-10T14:00:00.000Z	33 \| good	5.642 \| good	11.662 \| good	26.397 \| good	0.358 \| good	9.056 \| good	0.217 \| good
2026-03-10T15:00:00.000Z	38 \| good	6.86 \| good	23.147 \| good	22.761 \| good	0.386 \| good	8.638 \| good	0.228 \| good
2026-03-10T16:00:00.000Z	38 \| good	6.887 \| good	24.481 \| good	25.921 \| good	0.291 \| good	7.646 \| good	0.266 \| good
2026-03-10T17:00:00.000Z	33 \| good	5.838 \| good	27.385 \| good	25.629 \| good	0.325 \| good	5.089 \| good	0.243 \| good
2026-03-10T18:00:00.000Z	27 \| good	5.263 \| good	21.584 \| good	24.076 \| good	0.273 \| good	5.38 \| good	0.243 \| good
2026-03-10T19:00:00.000Z	27 \| good	4.527 \| good	23.964 \| good	25.48 \| good	0.238 \| good	5.511 \| good	0.209 \| good
2026-03-10T20:00:00.000Z	28 \| good	4.223 \| good	29.958 \| good	28.546 \| good	0.252 \| good	6.094 \| good	0.209 \| good
2026-03-10T21:00:00.000Z	40 \| good	5.233 \| good	42.568 \| good	26.332 \| good	0.232 \| good	6.669 \| good	0.252 \| good
2026-03-10T22:00:00.000Z	31 \| good	3.855 \| good	31.002 \| good	33.751 \| good	0.268 \| good	7.341 \| good	0.252 \| good
2026-03-10T23:00:00.000Z	34 \| good	5.912 \| good	37.032 \| good	29.519 \| good	0.22 \| good	4.88 \| good	0.267 \| good
2026-03-11T00:00:00.000Z	28 \| good	5.373 \| good	29.827 \| good	28.583 \| good	0.308 \| good	4.402 \| good	0.217 \| good
2026-03-11T01:00:00.000Z	27 \| good	5.318 \| good	24.387 \| good	26.883 \| good	0.43 \| good	3.686 \| good	0.217 \| good
2026-03-11T02:00:00.000Z	49 \| good	8.983 \| good	42.052 \| good	28.685 \| good	0.364 \| good	2.94 \| good	0.161 \| good
2026-03-11T03:00:00.000Z	44 \| good	7.905 \| good	40.082 \| good	28.976 \| good	0.378 \| good	8.774 \| good	0.174 \| good
2026-03-11T04:00:00.000Z	33 \| good	5.567 \| good	18.959 \| good	29.401 \| good	0.34 \| good	6.49 \| good	0.161 \| good
2026-03-11T05:00:00.000Z	27 \| good	4.756 \| good	23.266 \| good	26.581 \| good	0.326 \| good	10.135 \| good	0.174 \| good
2026-03-11T06:00:00.000Z	27 \| good	4.923 \| good	23.206 \| good	27.578 \| good	0.352 \| good	9.065 \| good	0.174 \| good
2026-03-11T07:00:00.000Z	27 \| good	5.088 \| good	17.531 \| good	28.405 \| good	0.349 \| good	6.74 \| good	0.174 \| good
2026-03-11T08:00:00.000Z	33 \| good	5.633 \| good	26.034 \| good	30.424 \| good	0.401 \| good	4.633 \| good	0.161 \| good
2026-03-11T09:00:00.000Z	33 \| good	5.605 \| good	21.059 \| good	25.374 \| good	0.465 \| good	6.879 \| good	0.161 \| good
2026-03-11T10:00:00.000Z	27 \| good	5.12 \| good	10.842 \| good	29.097 \| good	0.329 \| good	6.553 \| good	0.161 \| good
2026-03-11T11:00:00.000Z	30 \| good	4.742 \| good	23.383 \| good	32.488 \| good	0.449 \| good	8.136 \| good	0.161 \| good
2026-03-11T12:00:00.000Z	23 \| good	3.707 \| good	16.359 \| good	24.616 \| good	0.299 \| good	10.099 \| good	0.204 \| good
2026-03-11T13:00:00.000Z	26 \| good	3.777 \| good	10.217 \| good	28.364 \| good	0.272 \| good	10.276 \| good	0.204 \| good
2026-03-11T14:00:00.000Z	25 \| good	3.217 \| good	14.953 \| good	27.123 \| good	0.25 \| good	8.461 \| good	0.223 \| good
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
2026-03-12T03:00:00.000Z	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	30 \| good	2.13 \| good	8.709 \| good	32.42 \| good	0.431 \| good	2.806 \| good	0.157 \| good
2026-03-12T05:00:00.000Z	30 \| good	2.493 \| good	10.062 \| good	31.736 \| good	0.406 \| good	2.717 \| good	0.158 \| good
2026-03-12T06:00:00.000Z	29 \| good	2.771 \| good	11.569 \| good	30.689 \| good	0.381 \| good	2.628 \| good	0.159 \| good
2026-03-12T07:00:00.000Z	27 \| good	2.445 \| good	10 \| good	28.771 \| good	0.405 \| good	2.579 \| good	0.159 \| good
2026-03-12T08:00:00.000Z	27 \| good	2.313 \| good	9.709 \| good	29.267 \| good	0.429 \| good	2.531 \| good	0.16 \| good
2026-03-12T09:00:00.000Z	25 \| good	1.941 \| good	8.02 \| good	27.107 \| good	0.454 \| good	2.482 \| good	0.161 \| good
2026-03-12T10:00:00.000Z	22 \| good	2.295 \| good	9.641 \| good	24.456 \| good	0.481 \| good	2.609 \| good	0.161 \| good
2026-03-12T11:00:00.000Z	19 \| good	3.194 \| good	13.63 \| good	21.22 \| good	0.508 \| good	2.736 \| good	0.162 \| good
2026-03-12T12:00:00.000Z	18 \| good	2.454 \| good	10.082 \| good	19.046 \| good	0.536 \| good	2.862 \| good	0.163 \| good
2026-03-12T13:00:00.000Z	22 \| good	3.881 \| good	17.014 \| good	22.293 \| good	0.536 \| good	2.868 \| good	0.167 \| good
2026-03-12T14:00:00.000Z	27 \| good	5.141 \| good	21.885 \| good	29.029 \| good	0.537 \| good	2.874 \| good	0.17 \| good
2026-03-12T15:00:00.000Z	33 \| good	3.91 \| good	17.037 \| good	36.006 \| good	0.537 \| good	2.88 \| good	0.174 \| good
2026-03-12T16:00:00.000Z	34 \| good	2.254 \| good	9.094 \| good	37.438 \| good	0.535 \| good	2.392 \| good	0.168 \| good
2026-03-12T17:00:00.000Z	36 \| good	2.831 \| good	11.745 \| good	38.578 \| good	0.533 \| good	1.904 \| good	0.162 \| good
2026-03-12T18:00:00.000Z	37 \| good	2.841 \| good	11.745 \| good	40.37 \| good	0.53 \| good	1.416 \| good	0.156 \| good
2026-03-12T19:00:00.000Z	38 \| good	3.942 \| good	16.885 \| good	40.954 \| good	0.521 \| good	1.493 \| good	0.151 \| good
2026-03-12T20:00:00.000Z	36 \| good	4.68 \| good	20.644 \| good	38.748 \| good	0.511 \| good	1.57 \| good	0.146 \| good
2026-03-12T21:00:00.000Z	35 \| good	6.195 \| good	27.356 \| good	37.926 \| good	0.502 \| good	1.647 \| good	0.142 \| good
2026-03-12T22:00:00.000Z	38 \| good	6.802 \| good	30.311 \| good	38.568 \| good	0.58 \| good	2.683 \| good	0.147 \| good
2026-03-12T23:00:00.000Z	52 \| moderate	9.808 \| good	43.29 \| good	34.416 \| good	0.658 \| good	3.719 \| good	0.152 \| good
2026-03-13T00:00:00.000Z	54 \| moderate	10.933 \| good	48.369 \| good	30.484 \| good	0.736 \| good	4.755 \| good	0.157 \| good
2026-03-13T01:00:00.000Z	56 \| moderate	11.61 \| good	51.602 \| good	27.007 \| good	0.761 \| good	4.318 \| good	0.154 \| good
2026-03-13T02:00:00.000Z	38 \| good	7.235 \| good	32.127 \| good	35.015 \| good	0.786 \| good	3.881 \| good	0.152 \| good
2026-03-13T03:00:00.000Z	34 \| good	6.4 \| good	28.641 \| good	36.894 \| good	0.811 \| good	3.443 \| good	0.149 \| good
2026-03-13T04:00:00.000Z	35 \| good	5.342 \| good	23 \| good	38.497 \| good	0.772 \| good	2.896 \| good	0.144 \| good
2026-03-13T05:00:00.000Z	34 \| good	4.618 \| good	20 \| good	36.784 \| good	0.734 \| good	2.348 \| good	0.139 \| good
2026-03-13T06:00:00.000Z	33 \| good	4.13 \| good	18 \| good	36.028 \| good	0.695 \| good	1.801 \| good	0.134 \| good
2026-03-13T07:00:00.000Z	34 \| good	3.412 \| good	15 \| good	36.501 \| good	0.599 \| good	1.543 \| good	0.131 \| good
2026-03-13T08:00:00.000Z	39 \| good	3.529 \| good	15.897 \| good	41.944 \| good	0.503 \| good	1.285 \| good	0.129 \| good
2026-03-13T09:00:00.000Z	46 \| good	1.426 \| good	5.877 \| good	50.036 \| good	0.407 \| good	1.027 \| good	0.126 \| good
2026-03-13T10:00:00.000Z	44 \| good	1.584 \| good	6.082 \| good	47.35 \| good	0.319 \| good	0.939 \| good	0.128 \| good
2026-03-13T11:00:00.000Z	37 \| good	2.09 \| good	8.135 \| good	39.516 \| good	0.231 \| good	0.852 \| good	0.131 \| good
2026-03-13T12:00:00.000Z	32 \| good	0.987 \| good	4 \| good	35.305 \| good	0.144 \| good	0.765 \| good	0.133 \| good
2026-03-13T13:00:00.000Z	31 \| good	0.59 \| good	2 \| good	33.131 \| good	0.195 \| good	0.895 \| good	0.14 \| good
2026-03-13T14:00:00.000Z	31 \| good	1.454 \| good	6 \| good	32.841 \| good	0.246 \| good	1.025 \| good	0.147 \| good
2026-03-13T15:00:00.000Z	31 \| good	1.047 \| good	4.021 \| good	32.579 \| good	0.298 \| good	1.155 \| good	0.154 \| good
2026-03-13T16:00:00.000Z	29 \| good	0.924 \| good	3.939 \| good	30.773 \| good	0.3 \| good	1.009 \| good	0.152 \| good
2026-03-13T17:00:00.000Z	30 \| good	1.848 \| good	8 \| good	31.541 \| good	0.302 \| good	0.863 \| good	0.151 \| good
2026-03-13T18:00:00.000Z	29 \| good	2.811 \| good	11.642 \| good	31.181 \| good	0.305 \| good	0.717 \| good	0.15 \| good
2026-03-13T19:00:00.000Z	29 \| good	2.335 \| good	9.971 \| good	31.104 \| good	0.308 \| good	0.729 \| good	0.147 \| good
2026-03-13T20:00:00.000Z	31 \| good	1.779 \| good	7.291 \| good	32.855 \| good	0.312 \| good	0.742 \| good	0.145 \| good
2026-03-13T21:00:00.000Z	31 \| good	1.629 \| good	6.372 \| good	34.29 \| good	0.315 \| good	0.754 \| good	0.142 \| good
2026-03-13T22:00:00.000Z	29 \| good	1.952 \| good	7.98 \| good	31.437 \| good	0.338 \| good	1.291 \| good	0.144 \| good
2026-03-13T23:00:00.000Z	29 \| good	3.69 \| good	16.053 \| good	30.804 \| good	0.362 \| good	1.829 \| good	0.147 \| good
2026-03-14T00:00:00.000Z	43 \| good	2.775 \| good	3.547 \| good	46.205 \| good	0.383 \| good	2.336 \| good	0.149 \| good
2026-03-14T01:00:00.000Z	29 \| good	3.538 \| good	15.68 \| good	31.318 \| good	0.415 \| good	2.741 \| good	0.152 \| good
2026-03-14T02:00:00.000Z	30 \| good	4.087 \| good	17.762 \| good	32.262 \| good	0.445 \| good	3.116 \| good	0.155 \| good
2026-03-14T03:00:00.000Z	29 \| good	4.49 \| good	19.661 \| good	31.133 \| good	0.475 \| good	3.49 \| good	0.158 \| 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 03:00:00 on 2026-03-11.

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 08:00:00 on 2026-03-11.

What is the current air quality in Mchenry, Illinois?

The current air quality in Mchenry, Illinois is 30, 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 1.956 μg/m³.

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

The current PM₁₀ concentration at Mchenry, Illinois is 7.698 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 0.307 ppb.

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

The current ozone (O₃) concentration at Mchenry, Illinois is 32.159 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Mchenry, Illinois is 5.372 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-10T04:00:00.000Z	56 \| moderate	12.301 \| fine	55.856 \| fine	28.195 \| good	0.634 \| good	14.364 \| good	0.326 \| good
2026-03-10T05:00:00.000Z	49 \| good	8.97 \| good	38.126 \| good	27.062 \| good	0.583 \| good	12.16 \| good	0.339 \| good
2026-03-10T06:00:00.000Z	52 \| moderate	9.708 \| good	42.047 \| good	24.308 \| good	0.468 \| good	12.056 \| good	0.277 \| good
2026-03-10T07:00:00.000Z	49 \| good	8.654 \| good	38.631 \| good	19.011 \| good	0.47 \| good	5.231 \| good	0.277 \| good
2026-03-10T08:00:00.000Z	49 \| good	9.154 \| good	40.051 \| good	21.242 \| good	0.332 \| good	4.273 \| good	0.167 \| good
2026-03-10T09:00:00.000Z	44 \| good	8.383 \| good	29.39 \| good	16.596 \| good	0.336 \| good	3.972 \| good	0.174 \| good
2026-03-10T10:00:00.000Z	44 \| good	8.147 \| good	33.431 \| good	16.318 \| good	0.358 \| good	3.965 \| good	0.178 \| good
2026-03-10T11:00:00.000Z	44 \| good	8.484 \| good	25.513 \| good	13.657 \| good	0.338 \| good	6.887 \| good	0.232 \| good
2026-03-10T12:00:00.000Z	38 \| good	7.188 \| good	32.028 \| good	15.839 \| good	0.352 \| good	8.008 \| good	0.271 \| good
2026-03-10T13:00:00.000Z	33 \| good	5.566 \| good	12.587 \| good	28.39 \| good	0.326 \| good	7.626 \| good	0.271 \| good
2026-03-10T14:00:00.000Z	33 \| good	5.642 \| good	11.662 \| good	26.397 \| good	0.358 \| good	9.056 \| good	0.217 \| good
2026-03-10T15:00:00.000Z	38 \| good	6.86 \| good	23.147 \| good	22.761 \| good	0.386 \| good	8.638 \| good	0.228 \| good
2026-03-10T16:00:00.000Z	38 \| good	6.887 \| good	24.481 \| good	25.921 \| good	0.291 \| good	7.646 \| good	0.266 \| good
2026-03-10T17:00:00.000Z	33 \| good	5.838 \| good	27.385 \| good	25.629 \| good	0.325 \| good	5.089 \| good	0.243 \| good
2026-03-10T18:00:00.000Z	27 \| good	5.263 \| good	21.584 \| good	24.076 \| good	0.273 \| good	5.38 \| good	0.243 \| good
2026-03-10T19:00:00.000Z	27 \| good	4.527 \| good	23.964 \| good	25.48 \| good	0.238 \| good	5.511 \| good	0.209 \| good
2026-03-10T20:00:00.000Z	28 \| good	4.223 \| good	29.958 \| good	28.546 \| good	0.252 \| good	6.094 \| good	0.209 \| good
2026-03-10T21:00:00.000Z	40 \| good	5.233 \| good	42.568 \| good	26.332 \| good	0.232 \| good	6.669 \| good	0.252 \| good
2026-03-10T22:00:00.000Z	31 \| good	3.855 \| good	31.002 \| good	33.751 \| good	0.268 \| good	7.341 \| good	0.252 \| good
2026-03-10T23:00:00.000Z	34 \| good	5.912 \| good	37.032 \| good	29.519 \| good	0.22 \| good	4.88 \| good	0.267 \| good
2026-03-11T00:00:00.000Z	28 \| good	5.373 \| good	29.827 \| good	28.583 \| good	0.308 \| good	4.402 \| good	0.217 \| good
2026-03-11T01:00:00.000Z	27 \| good	5.318 \| good	24.387 \| good	26.883 \| good	0.43 \| good	3.686 \| good	0.217 \| good
2026-03-11T02:00:00.000Z	49 \| good	8.983 \| good	42.052 \| good	28.685 \| good	0.364 \| good	2.94 \| good	0.161 \| good
2026-03-11T03:00:00.000Z	44 \| good	7.905 \| good	40.082 \| good	28.976 \| good	0.378 \| good	8.774 \| good	0.174 \| good
2026-03-11T04:00:00.000Z	33 \| good	5.567 \| good	18.959 \| good	29.401 \| good	0.34 \| good	6.49 \| good	0.161 \| good
2026-03-11T05:00:00.000Z	27 \| good	4.756 \| good	23.266 \| good	26.581 \| good	0.326 \| good	10.135 \| good	0.174 \| good
2026-03-11T06:00:00.000Z	27 \| good	4.923 \| good	23.206 \| good	27.578 \| good	0.352 \| good	9.065 \| good	0.174 \| good
2026-03-11T07:00:00.000Z	27 \| good	5.088 \| good	17.531 \| good	28.405 \| good	0.349 \| good	6.74 \| good	0.174 \| good
2026-03-11T08:00:00.000Z	33 \| good	5.633 \| good	26.034 \| good	30.424 \| good	0.401 \| good	4.633 \| good	0.161 \| good
2026-03-11T09:00:00.000Z	33 \| good	5.605 \| good	21.059 \| good	25.374 \| good	0.465 \| good	6.879 \| good	0.161 \| good
2026-03-11T10:00:00.000Z	27 \| good	5.12 \| good	10.842 \| good	29.097 \| good	0.329 \| good	6.553 \| good	0.161 \| good
2026-03-11T11:00:00.000Z	30 \| good	4.742 \| good	23.383 \| good	32.488 \| good	0.449 \| good	8.136 \| good	0.161 \| good
2026-03-11T12:00:00.000Z	23 \| good	3.707 \| good	16.359 \| good	24.616 \| good	0.299 \| good	10.099 \| good	0.204 \| good
2026-03-11T13:00:00.000Z	26 \| good	3.777 \| good	10.217 \| good	28.364 \| good	0.272 \| good	10.276 \| good	0.204 \| good
2026-03-11T14:00:00.000Z	25 \| good	3.217 \| good	14.953 \| good	27.123 \| good	0.25 \| good	8.461 \| good	0.223 \| good
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
2026-03-12T03:00:00.000Z	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	30 \| good	2.13 \| good	8.709 \| good	32.42 \| good	0.431 \| good	2.806 \| good	0.157 \| good
2026-03-12T05:00:00.000Z	30 \| good	2.493 \| good	10.062 \| good	31.736 \| good	0.406 \| good	2.717 \| good	0.158 \| good
2026-03-12T06:00:00.000Z	29 \| good	2.771 \| good	11.569 \| good	30.689 \| good	0.381 \| good	2.628 \| good	0.159 \| good
2026-03-12T07:00:00.000Z	27 \| good	2.445 \| good	10 \| good	28.771 \| good	0.405 \| good	2.579 \| good	0.159 \| good
2026-03-12T08:00:00.000Z	27 \| good	2.313 \| good	9.709 \| good	29.267 \| good	0.429 \| good	2.531 \| good	0.16 \| good
2026-03-12T09:00:00.000Z	25 \| good	1.941 \| good	8.02 \| good	27.107 \| good	0.454 \| good	2.482 \| good	0.161 \| good
2026-03-12T10:00:00.000Z	22 \| good	2.295 \| good	9.641 \| good	24.456 \| good	0.481 \| good	2.609 \| good	0.161 \| good
2026-03-12T11:00:00.000Z	19 \| good	3.194 \| good	13.63 \| good	21.22 \| good	0.508 \| good	2.736 \| good	0.162 \| good
2026-03-12T12:00:00.000Z	18 \| good	2.454 \| good	10.082 \| good	19.046 \| good	0.536 \| good	2.862 \| good	0.163 \| good
2026-03-12T13:00:00.000Z	22 \| good	3.881 \| good	17.014 \| good	22.293 \| good	0.536 \| good	2.868 \| good	0.167 \| good
2026-03-12T14:00:00.000Z	27 \| good	5.141 \| good	21.885 \| good	29.029 \| good	0.537 \| good	2.874 \| good	0.17 \| good
2026-03-12T15:00:00.000Z	33 \| good	3.91 \| good	17.037 \| good	36.006 \| good	0.537 \| good	2.88 \| good	0.174 \| good
2026-03-12T16:00:00.000Z	34 \| good	2.254 \| good	9.094 \| good	37.438 \| good	0.535 \| good	2.392 \| good	0.168 \| good
2026-03-12T17:00:00.000Z	36 \| good	2.831 \| good	11.745 \| good	38.578 \| good	0.533 \| good	1.904 \| good	0.162 \| good
2026-03-12T18:00:00.000Z	37 \| good	2.841 \| good	11.745 \| good	40.37 \| good	0.53 \| good	1.416 \| good	0.156 \| good
2026-03-12T19:00:00.000Z	38 \| good	3.942 \| good	16.885 \| good	40.954 \| good	0.521 \| good	1.493 \| good	0.151 \| good
2026-03-12T20:00:00.000Z	36 \| good	4.68 \| good	20.644 \| good	38.748 \| good	0.511 \| good	1.57 \| good	0.146 \| good
2026-03-12T21:00:00.000Z	35 \| good	6.195 \| good	27.356 \| good	37.926 \| good	0.502 \| good	1.647 \| good	0.142 \| good
2026-03-12T22:00:00.000Z	38 \| good	6.802 \| good	30.311 \| good	38.568 \| good	0.58 \| good	2.683 \| good	0.147 \| good
2026-03-12T23:00:00.000Z	52 \| moderate	9.808 \| good	43.29 \| good	34.416 \| good	0.658 \| good	3.719 \| good	0.152 \| good
2026-03-13T00:00:00.000Z	54 \| moderate	10.933 \| good	48.369 \| good	30.484 \| good	0.736 \| good	4.755 \| good	0.157 \| good
2026-03-13T01:00:00.000Z	56 \| moderate	11.61 \| good	51.602 \| good	27.007 \| good	0.761 \| good	4.318 \| good	0.154 \| good
2026-03-13T02:00:00.000Z	38 \| good	7.235 \| good	32.127 \| good	35.015 \| good	0.786 \| good	3.881 \| good	0.152 \| good
2026-03-13T03:00:00.000Z	34 \| good	6.4 \| good	28.641 \| good	36.894 \| good	0.811 \| good	3.443 \| good	0.149 \| good
2026-03-13T04:00:00.000Z	35 \| good	5.342 \| good	23 \| good	38.497 \| good	0.772 \| good	2.896 \| good	0.144 \| good
2026-03-13T05:00:00.000Z	34 \| good	4.618 \| good	20 \| good	36.784 \| good	0.734 \| good	2.348 \| good	0.139 \| good
2026-03-13T06:00:00.000Z	33 \| good	4.13 \| good	18 \| good	36.028 \| good	0.695 \| good	1.801 \| good	0.134 \| good
2026-03-13T07:00:00.000Z	34 \| good	3.412 \| good	15 \| good	36.501 \| good	0.599 \| good	1.543 \| good	0.131 \| good
2026-03-13T08:00:00.000Z	39 \| good	3.529 \| good	15.897 \| good	41.944 \| good	0.503 \| good	1.285 \| good	0.129 \| good
2026-03-13T09:00:00.000Z	46 \| good	1.426 \| good	5.877 \| good	50.036 \| good	0.407 \| good	1.027 \| good	0.126 \| good
2026-03-13T10:00:00.000Z	44 \| good	1.584 \| good	6.082 \| good	47.35 \| good	0.319 \| good	0.939 \| good	0.128 \| good
2026-03-13T11:00:00.000Z	37 \| good	2.09 \| good	8.135 \| good	39.516 \| good	0.231 \| good	0.852 \| good	0.131 \| good
2026-03-13T12:00:00.000Z	32 \| good	0.987 \| good	4 \| good	35.305 \| good	0.144 \| good	0.765 \| good	0.133 \| good
2026-03-13T13:00:00.000Z	31 \| good	0.59 \| good	2 \| good	33.131 \| good	0.195 \| good	0.895 \| good	0.14 \| good
2026-03-13T14:00:00.000Z	31 \| good	1.454 \| good	6 \| good	32.841 \| good	0.246 \| good	1.025 \| good	0.147 \| good
2026-03-13T15:00:00.000Z	31 \| good	1.047 \| good	4.021 \| good	32.579 \| good	0.298 \| good	1.155 \| good	0.154 \| good
2026-03-13T16:00:00.000Z	29 \| good	0.924 \| good	3.939 \| good	30.773 \| good	0.3 \| good	1.009 \| good	0.152 \| good
2026-03-13T17:00:00.000Z	30 \| good	1.848 \| good	8 \| good	31.541 \| good	0.302 \| good	0.863 \| good	0.151 \| good
2026-03-13T18:00:00.000Z	29 \| good	2.811 \| good	11.642 \| good	31.181 \| good	0.305 \| good	0.717 \| good	0.15 \| good
2026-03-13T19:00:00.000Z	29 \| good	2.335 \| good	9.971 \| good	31.104 \| good	0.308 \| good	0.729 \| good	0.147 \| good
2026-03-13T20:00:00.000Z	31 \| good	1.779 \| good	7.291 \| good	32.855 \| good	0.312 \| good	0.742 \| good	0.145 \| good
2026-03-13T21:00:00.000Z	31 \| good	1.629 \| good	6.372 \| good	34.29 \| good	0.315 \| good	0.754 \| good	0.142 \| good
2026-03-13T22:00:00.000Z	29 \| good	1.952 \| good	7.98 \| good	31.437 \| good	0.338 \| good	1.291 \| good	0.144 \| good
2026-03-13T23:00:00.000Z	29 \| good	3.69 \| good	16.053 \| good	30.804 \| good	0.362 \| good	1.829 \| good	0.147 \| good
2026-03-14T00:00:00.000Z	43 \| good	2.775 \| good	3.547 \| good	46.205 \| good	0.383 \| good	2.336 \| good	0.149 \| good
2026-03-14T01:00:00.000Z	29 \| good	3.538 \| good	15.68 \| good	31.318 \| good	0.415 \| good	2.741 \| good	0.152 \| good
2026-03-14T02:00:00.000Z	30 \| good	4.087 \| good	17.762 \| good	32.262 \| good	0.445 \| good	3.116 \| good	0.155 \| good
2026-03-14T03:00:00.000Z	29 \| good	4.49 \| good	19.661 \| good	31.133 \| good	0.475 \| good	3.49 \| good	0.158 \| 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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