What is the PM10 level in Decatur, Illinois at the moment?

The PM10 concentration in Decatur, Illinois is 14.948 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Decatur, Illinois at the moment?

Currently, Decatur, Illinois has a sulfur dioxide (SO2) concentration of 0.645 ppb.

What is the ozone (O3) level in Decatur, Illinois at the moment?

The current ozone (O3) level in Decatur, Illinois at the moment is 20.028 ppm.

What is the nitrogen dioxide (NO2) level in Decatur, Illinois at the moment?

Nitrogen dioxide (NO2) level in Decatur, Illinois at the moment is 3.754 ppb.

Live air quality index in Decatur, Illinois today

Q: What is the PM2.5 level in Decatur, Illinois at the moment?

PM2.5 levels in Decatur, Illinois are currently 3.291 μg/m3.

Stay updated with real-time air quality in Decatur, 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

Decatur, Illinois

Last updated: ... (Local time)

Major air pollutants in Decatur, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.29 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.95 μg/m³

155

255

425

605+

Ozone (O₃)

20.03 ppb

201

201+

Sulfur Dioxide (SO₂)

0.65 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.75 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.13 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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Decatur, Illinois

Scroll To Air Quality Map

Track live Decatur, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T12:00:00.000Z	22 \| good	3.684 \| good	15.92 \| good	14.992 \| good	0.619 \| good	15.994 \| good	0.18 \| good
2025-10-20T13:00:00.000Z	17 \| good	3.388 \| good	14.934 \| good	13.032 \| good	0.601 \| good	17.996 \| good	0.206 \| good
2025-10-20T14:00:00.000Z	38 \| good	6.942 \| good	30.733 \| good	13.016 \| good	1.019 \| good	14.414 \| good	0.366 \| good
2025-10-20T15:00:00.000Z	33 \| good	5.858 \| good	26.797 \| good	17.002 \| good	0.67 \| good	9.659 \| good	0.166 \| good
2025-10-20T16:00:00.000Z	27 \| good	4.87 \| good	20.873 \| good	21.984 \| good	0.912 \| good	6.671 \| good	0.166 \| good
2025-10-20T17:00:00.000Z	31 \| good	4.4 \| good	18.976 \| good	34.168 \| good	0.758 \| good	1.468 \| good	0.139 \| good
2025-10-20T18:00:00.000Z	32 \| good	4.606 \| good	20 \| good	34.592 \| good	0.699 \| good	0.548 \| good	0.125 \| good
2025-10-20T19:00:00.000Z	36 \| good	4.624 \| good	20 \| good	39.131 \| good	0.686 \| good	0.579 \| good	0.124 \| good
2025-10-20T20:00:00.000Z	38 \| good	6.297 \| good	28.024 \| good	40.537 \| good	0.673 \| good	0.61 \| good	0.123 \| good
2025-10-20T21:00:00.000Z	37 \| good	5.944 \| good	26.822 \| good	39.743 \| good	0.66 \| good	0.641 \| good	0.123 \| good
2025-10-20T22:00:00.000Z	34 \| good	3.785 \| good	16.92 \| good	36.994 \| good	0.67 \| good	3.542 \| good	0.141 \| good
2025-10-20T23:00:00.000Z	33 \| good	3.491 \| good	15.943 \| good	36.013 \| good	0.95 \| good	4.245 \| good	0.156 \| good
2025-10-21T00:00:00.000Z	31 \| good	3.887 \| good	16.94 \| good	34.005 \| good	0.62 \| good	4.39 \| good	0.184 \| good
2025-10-21T01:00:00.000Z	34 \| good	3.38 \| good	15 \| good	36.583 \| good	0.839 \| good	1.778 \| good	0.131 \| good
2025-10-21T02:00:00.000Z	33 \| good	3.693 \| good	15.976 \| good	35.972 \| good	0.492 \| good	5.048 \| good	0.141 \| good
2025-10-21T03:00:00.000Z	28 \| good	1.055 \| good	4.316 \| good	29.565 \| good	0.833 \| good	1.976 \| good	0.132 \| good
2025-10-21T04:00:00.000Z	31 \| good	3.993 \| good	17.966 \| good	33.021 \| good	1.406 \| good	4.189 \| good	0.156 \| good
2025-10-21T05:00:00.000Z	27 \| good	4.633 \| good	20.187 \| good	24.433 \| good	0.649 \| good	1.951 \| good	0.128 \| good
2025-10-21T06:00:00.000Z	31 \| good	4.096 \| good	17.984 \| good	32.971 \| good	0.619 \| good	4.327 \| good	0.191 \| good
2025-10-21T07:00:00.000Z	29 \| good	4.096 \| good	17.984 \| good	30.998 \| good	0.516 \| good	4.334 \| good	0.192 \| good
2025-10-21T08:00:00.000Z	29 \| good	3.797 \| good	16.982 \| good	30.958 \| good	0.507 \| good	4.357 \| good	0.192 \| good
2025-10-21T09:00:00.000Z	20 \| good	1.412 \| good	5.436 \| good	21.754 \| good	0.389 \| good	2.048 \| good	0.114 \| good
2025-10-21T10:00:00.000Z	22 \| good	4.042 \| good	17.738 \| good	19.667 \| good	0.424 \| good	2.311 \| good	0.116 \| good
2025-10-21T11:00:00.000Z	27 \| good	4.694 \| good	20.272 \| good	21.37 \| good	0.459 \| good	2.574 \| good	0.118 \| good
2025-10-21T12:00:00.000Z	33 \| good	5.776 \| good	25.197 \| good	19.156 \| good	0.456 \| good	2.93 \| good	0.133 \| good
2025-10-21T13:00:00.000Z	22 \| good	3.695 \| good	15.982 \| good	21.994 \| good	0.375 \| good	8.713 \| good	0.356 \| good
2025-10-21T14:00:00.000Z	22 \| good	4.396 \| good	19.113 \| good	20.48 \| good	0.513 \| good	2.308 \| good	0.135 \| good
2025-10-21T15:00:00.000Z	23 \| good	3.496 \| good	15.978 \| good	24.956 \| good	0.762 \| good	4.749 \| good	0.166 \| good
2025-10-21T16:00:00.000Z	23 \| good	3.396 \| good	14.978 \| good	24.985 \| good	0.608 \| good	4.381 \| good	0.14 \| good
2025-10-21T17:00:00.000Z	25 \| good	3.396 \| good	14.978 \| good	26.976 \| good	0.487 \| good	3.142 \| good	0.14 \| good
2025-10-21T18:00:00.000Z	26 \| good	3.292 \| good	14.951 \| good	27.978 \| good	0.408 \| good	2.895 \| good	0.126 \| good
2025-10-21T19:00:00.000Z	27 \| good	3.191 \| good	13.951 \| good	29.009 \| good	0.471 \| good	3.201 \| good	0.212 \| good
2025-10-21T20:00:00.000Z	27 \| good	3.191 \| good	13.951 \| good	29.016 \| good	0.477 \| good	3.038 \| good	0.227 \| good
2025-10-21T21:00:00.000Z	28 \| good	3.093 \| good	13.957 \| good	30.006 \| good	0.163 \| good	2.999 \| good	0.126 \| good
2025-10-21T22:00:00.000Z	28 \| good	3.093 \| good	13.949 \| good	29.994 \| good	0.342 \| good	3.045 \| good	0.111 \| good
2025-10-21T23:00:00.000Z	28 \| good	3.091 \| good	13.947 \| good	29.997 \| good	0.331 \| good	2.959 \| good	0.111 \| good
2025-10-22T00:00:00.000Z	30 \| good	2.896 \| good	11.984 \| good	31.975 \| good	0.272 \| good	4.239 \| good	0.111 \| good
2025-10-22T01:00:00.000Z	29 \| good	2.896 \| good	11.984 \| good	30.978 \| good	0.297 \| good	4.624 \| good	0.126 \| good
2025-10-22T02:00:00.000Z	27 \| good	2.999 \| good	12.003 \| good	28.984 \| good	0.318 \| good	5.887 \| good	0.14 \| good
2025-10-22T03:00:00.000Z	28 \| good	0.779 \| good	2.902 \| good	30.44 \| good	0.238 \| good	1.849 \| good	0.129 \| good
2025-10-22T04:00:00.000Z	23 \| good	3.088 \| good	14.431 \| good	24.991 \| good	0.36 \| good	5.92 \| good	0.14 \| good
2025-10-22T05:00:00.000Z	21 \| good	3.395 \| good	14.978 \| good	23.002 \| good	0.421 \| good	5.114 \| good	0.152 \| good
2025-10-22T06:00:00.000Z	20 \| good	3.395 \| good	14.978 \| good	22.018 \| good	0.639 \| good	4.761 \| good	0.14 \| good
2025-10-22T07:00:00.000Z	23 \| good	3.394 \| good	14.96 \| good	24.979 \| good	0.656 \| good	4.76 \| good	0.14 \| good
2025-10-22T08:00:00.000Z	20 \| good	0.969 \| good	4 \| good	22.286 \| good	0.23 \| good	1.638 \| good	0.122 \| good
2025-10-22T09:00:00.000Z	21 \| good	3.491 \| good	15.968 \| good	22.996 \| good	0.63 \| good	2.323 \| good	0.144 \| good
2025-10-22T10:00:00.000Z	19 \| good	3.291 \| good	14.948 \| good	20.028 \| good	0.645 \| good	3.754 \| good	0.126 \| good
2025-10-22T11:00:00.000Z	19 \| good	3.291 \| good	14.948 \| good	20.028 \| good	0.645 \| good	3.754 \| good	0.126 \| good
2025-10-22T12:00:00.000Z	20 \| good	2.709 \| good	11.063 \| good	22.062 \| good	0.279 \| good	1.766 \| good	0.113 \| good
2025-10-22T13:00:00.000Z	22 \| good	3.657 \| good	15.951 \| good	22.862 \| good	0.287 \| good	1.613 \| good	0.114 \| good
2025-10-22T14:00:00.000Z	25 \| good	2.536 \| good	10 \| good	27.497 \| good	0.296 \| good	1.459 \| good	0.115 \| good
2025-10-22T15:00:00.000Z	25 \| good	2.937 \| good	11.977 \| good	27.279 \| good	0.304 \| good	1.305 \| good	0.117 \| good
2025-10-22T16:00:00.000Z	23 \| good	2.896 \| good	11.844 \| good	24.881 \| good	0.297 \| good	1.136 \| good	0.116 \| good
2025-10-22T17:00:00.000Z	25 \| good	2.876 \| good	11.844 \| good	27.079 \| good	0.291 \| good	0.967 \| good	0.115 \| good
2025-10-22T18:00:00.000Z	28 \| good	2.12 \| good	8.787 \| good	29.527 \| good	0.284 \| good	0.798 \| good	0.114 \| good
2025-10-22T19:00:00.000Z	30 \| good	0.959 \| good	3.87 \| good	31.996 \| good	0.296 \| good	0.782 \| good	0.114 \| good
2025-10-22T20:00:00.000Z	30 \| good	0.246 \| good	0.901 \| good	31.783 \| good	0.309 \| good	0.767 \| good	0.113 \| good
2025-10-22T21:00:00.000Z	29 \| good	0.641 \| good	2.073 \| good	31.176 \| good	0.321 \| good	0.751 \| good	0.112 \| good
2025-10-22T22:00:00.000Z	28 \| good	0.646 \| good	2.099 \| good	30.045 \| good	0.334 \| good	1.26 \| good	0.116 \| good
2025-10-22T23:00:00.000Z	27 \| good	0.712 \| good	2.818 \| good	28.985 \| good	0.347 \| good	1.769 \| good	0.121 \| good
2025-10-23T00:00:00.000Z	23 \| good	0.216 \| good	0.523 \| good	24.589 \| good	0.36 \| good	2.278 \| good	0.126 \| good
2025-10-23T01:00:00.000Z	21 \| good	0.738 \| good	2.979 \| good	23.03 \| good	0.369 \| good	2.637 \| good	0.129 \| good
2025-10-23T02:00:00.000Z	24 \| good	0.755 \| good	2.979 \| good	26.45 \| good	0.379 \| good	2.996 \| good	0.132 \| good
2025-10-23T03:00:00.000Z	24 \| good	0.796 \| good	2.979 \| good	26.448 \| good	0.389 \| good	3.355 \| good	0.135 \| good
2025-10-23T04:00:00.000Z	23 \| good	0.834 \| good	3.11 \| good	25.226 \| good	0.382 \| good	3.458 \| good	0.136 \| good
2025-10-23T05:00:00.000Z	21 \| good	0.364 \| good	1.327 \| good	22.729 \| good	0.376 \| good	3.562 \| good	0.137 \| good
2025-10-23T06:00:00.000Z	15 \| good	0.686 \| good	2.441 \| good	16.223 \| good	0.369 \| good	3.666 \| good	0.138 \| good
2025-10-23T07:00:00.000Z	14 \| good	1.975 \| good	8.177 \| good	14.748 \| good	0.359 \| good	3.659 \| good	0.138 \| good
2025-10-23T08:00:00.000Z	16 \| good	3.049 \| good	12.719 \| good	13.716 \| good	0.348 \| good	3.653 \| good	0.138 \| good
2025-10-23T09:00:00.000Z	12 \| good	2.375 \| good	9.935 \| good	12.588 \| good	0.337 \| good	3.646 \| good	0.137 \| good
2025-10-23T10:00:00.000Z	22 \| good	3.73 \| good	16.36 \| good	4.887 \| good	0.329 \| good	3.848 \| good	0.139 \| good
2025-10-23T11:00:00.000Z	16 \| good	3.398 \| good	15.122 \| good	6.281 \| good	0.32 \| good	4.05 \| good	0.141 \| good
2025-10-23T12:00:00.000Z	27 \| good	4.982 \| good	21.418 \| good	6.473 \| good	0.312 \| good	4.252 \| good	0.143 \| good
2025-10-23T13:00:00.000Z	27 \| good	5.429 \| good	23.423 \| good	12.563 \| good	0.341 \| good	3.753 \| good	0.144 \| good
2025-10-23T14:00:00.000Z	27 \| good	5.48 \| good	23.387 \| good	20.104 \| good	0.37 \| good	3.254 \| good	0.146 \| good
2025-10-23T15:00:00.000Z	38 \| good	6.587 \| good	29.705 \| good	27.051 \| good	0.399 \| good	2.756 \| good	0.148 \| good
2025-10-23T16:00:00.000Z	38 \| good	7.273 \| good	32.045 \| good	30.849 \| good	0.429 \| good	2.191 \| good	0.141 \| good
2025-10-23T17:00:00.000Z	33 \| good	5.52 \| good	23.787 \| good	32.908 \| good	0.459 \| good	1.627 \| good	0.133 \| good
2025-10-23T18:00:00.000Z	33 \| good	4.545 \| good	19.813 \| good	35.754 \| good	0.488 \| good	1.062 \| good	0.126 \| good
2025-10-23T19:00:00.000Z	31 \| good	3.818 \| good	16.813 \| good	32.848 \| good	0.479 \| good	1.03 \| good	0.126 \| good
2025-10-23T20:00:00.000Z	31 \| good	3.847 \| good	16.813 \| good	34.397 \| good	0.47 \| good	0.998 \| good	0.126 \| good
2025-10-23T21:00:00.000Z	31 \| good	3.045 \| good	12.125 \| good	33.027 \| good	0.461 \| good	0.966 \| good	0.125 \| good
2025-10-23T22:00:00.000Z	26 \| good	3.512 \| good	15.763 \| good	28.478 \| good	0.446 \| good	2.144 \| good	0.135 \| good
2025-10-23T23:00:00.000Z	22 \| good	3.539 \| good	15.819 \| good	24.445 \| good	0.431 \| good	3.322 \| good	0.145 \| good
2025-10-24T00:00:00.000Z	22 \| good	3.608 \| good	15.973 \| good	19.322 \| good	0.416 \| good	4.5 \| good	0.155 \| good
2025-10-24T01:00:00.000Z	27 \| good	5.174 \| good	22.43 \| good	21.292 \| good	0.423 \| good	5.398 \| good	0.162 \| good
2025-10-24T02:00:00.000Z	33 \| good	5.932 \| good	26.058 \| good	20.535 \| good	0.431 \| good	6.295 \| good	0.17 \| good
2025-10-24T03:00:00.000Z	44 \| good	7.504 \| good	33.143 \| good	20.924 \| good	0.438 \| good	7.193 \| good	0.177 \| good
2025-10-24T04:00:00.000Z	33 \| good	6.226 \| good	27.431 \| good	19.737 \| good	0.445 \| good	7.965 \| good	0.182 \| good
2025-10-24T05:00:00.000Z	33 \| good	5.77 \| good	25.638 \| good	18.369 \| good	0.451 \| good	8.737 \| good	0.187 \| good
2025-10-24T06:00:00.000Z	44 \| good	8.173 \| good	8.456 \| good	16.076 \| good	0.459 \| good	9.527 \| good	0.192 \| good
2025-10-24T07:00:00.000Z	22 \| good	3.746 \| good	16.182 \| good	11.896 \| good	0.455 \| good	9.799 \| good	0.193 \| good
2025-10-24T08:00:00.000Z	16 \| good	2.949 \| good	12.306 \| good	14.402 \| good	0.452 \| good	10.09 \| good	0.194 \| good
2025-10-24T09:00:00.000Z	16 \| good	3.312 \| good	14.35 \| good	14.7 \| good	0.449 \| good	10.381 \| good	0.195 \| good
2025-10-24T10:00:00.000Z	44 \| good	8.022 \| good	35.273 \| good	8.159 \| good	0.449 \| good	11.32 \| good	0.201 \| good
2025-10-24T11:00:00.000Z	22 \| good	4.336 \| good	18.785 \| good	11.005 \| good	0.448 \| good	12.26 \| good	0.207 \| good

Decatur

Get reliable air quality data to drive your business

Decatur, Illinois air quality map: Stay updated on AQI near you

0.14ppm

How accurate is Illinois, USA air quality data?

Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Decatur, Illinois?

The air quality information for Decatur, Illinois is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Decatur, Illinois at its worst?

In the past 24 hours, the air quality in Decatur, Illinois was at its worst at 12:00:00 on 2025-10-21.

When did Decatur, Illinois experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Decatur, Illinois was observed at 10:00:00 on 2025-10-22.

What is the AQI in Decatur, Illinois right now?

As of now, the AQI in Decatur, Illinois is 19, indicating Good conditions.

What is the most common type of pollution in Decatur, Illinois?

Decatur, Illinois air has the highest levels of O3.

What should I do in case of poor air quality in Decatur, Illinois?

Poor air quality in Decatur, Illinois means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Decatur, Illinois at the moment?

PM_2.5 levels in Decatur, Illinois are currently 3.291 μg/m³.

What is the PM₁₀ level in Decatur, Illinois at the moment?

The PM₁₀ concentration in Decatur, Illinois is 14.948 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Decatur, Illinois at the moment?

The current carbon monoxide (CO) concentration in Decatur, Illinois is 0.126 ppm.

What is the sulfur dioxide (SO₂) level in Decatur, Illinois at the moment?

Currently, Decatur, Illinois has a sulfur dioxide (SO₂) concentration of 0.645 ppb.

What is the ozone (O₃) level in Decatur, Illinois at the moment?

The current ozone (O₃) level in Decatur, Illinois at the moment is 20.028 ppm.

What is the nitrogen dioxide (NO₂) level in Decatur, Illinois at the moment?

Nitrogen dioxide (NO₂) level in Decatur, Illinois at the moment is 3.754 ppb.

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