What is the current level of PM10 in Alton, Illinois?

Alton, Illinois currently has a PM10 concentration of 75.419 μg/m3.

What is the current level of sulfur dioxide (SO2) in Alton, Illinois?

The current sulfur dioxide (SO2) concentration in Alton, Illinois is 0.859 ppb.

What is the current level of ozone (O3) in Alton, Illinois?

Alton, Illinois currently has an ozone (O3) concentration of 15.252 ppm.

What is the current level of nitrogen dioxide (NO2) in Alton, Illinois?

The current level of nitrogen dioxide (NO2) in Alton, Illinois is 14.571 ppb.

Current air quality index in Alton, Illinois today

Q: What is the PM2.5 concentration in Alton, Illinois right now?

Alton, Illinois currently has a PM2.5 concentration of 16.843 μg/m3.

Stay updated with real-time air quality in Alton, 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

Alton, Illinois

Last updated: ... (Local time)

Common air pollutants in Alton, Illinois

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

16.84 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

75.42 μg/m³

155

255

425

605+

Ozone (O₃)

15.25 ppb

201

201+

Sulfur Dioxide (SO₂)

0.86 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

14.57 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.51 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Alton, Illinois

Get Live Pollen Counts

Alton, Illinois

Scroll To Air Quality Map

Track live Alton, Illinois air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T06:00:00.000Z	62 \| moderate	14.796 \| fine	57.046 \| fine	27.94 \| good	1.095 \| good	8.117 \| good	0.256 \| good
2026-01-21T07:00:00.000Z	60 \| moderate	14.447 \| fine	53.612 \| good	26.067 \| good	1.094 \| good	8.103 \| good	0.252 \| good
2026-01-21T08:00:00.000Z	62 \| moderate	15.421 \| fine	59.475 \| fine	26.483 \| good	1.122 \| good	8.091 \| good	0.241 \| good
2026-01-21T09:00:00.000Z	62 \| moderate	14.887 \| fine	58.266 \| fine	24.086 \| good	1.121 \| good	6.712 \| good	0.203 \| good
2026-01-21T10:00:00.000Z	58 \| moderate	13.215 \| fine	47.224 \| good	26.133 \| good	1.911 \| good	5.044 \| good	0.203 \| good
2026-01-21T11:00:00.000Z	54 \| moderate	11.198 \| good	47.661 \| good	20.484 \| good	2.087 \| good	5.103 \| good	0.203 \| good
2026-01-21T12:00:00.000Z	52 \| moderate	9.755 \| good	41.985 \| good	24.337 \| good	2.894 \| good	5.545 \| good	0.195 \| good
2026-01-21T13:00:00.000Z	54 \| moderate	10.527 \| good	42.601 \| good	22.91 \| good	2.537 \| good	7.904 \| good	0.237 \| good
2026-01-21T14:00:00.000Z	56 \| moderate	11.825 \| good	55.408 \| fine	23.556 \| good	2.738 \| good	9.621 \| good	0.324 \| good
2026-01-21T15:00:00.000Z	56 \| moderate	12.316 \| fine	54.839 \| good	26.584 \| good	2.397 \| good	8.675 \| good	0.324 \| good
2026-01-21T16:00:00.000Z	60 \| moderate	14.381 \| fine	65.782 \| fine	28.41 \| good	1.741 \| good	5.537 \| good	0.233 \| good
2026-01-21T17:00:00.000Z	62 \| moderate	14.928 \| fine	66.178 \| fine	26.995 \| good	0.933 \| good	4.48 \| good	0.237 \| good
2026-01-21T18:00:00.000Z	60 \| moderate	14.079 \| fine	62.034 \| fine	29.456 \| good	1.008 \| good	4.363 \| good	0.233 \| good
2026-01-21T19:00:00.000Z	58 \| moderate	13.369 \| fine	56.536 \| fine	29.055 \| good	2.567 \| good	4.04 \| good	0.233 \| good
2026-01-21T20:00:00.000Z	52 \| moderate	10.364 \| good	44.169 \| good	28.133 \| good	0.666 \| good	3.848 \| good	0.233 \| good
2026-01-21T21:00:00.000Z	49 \| good	8.776 \| good	38.77 \| good	30.595 \| good	0.518 \| good	3.26 \| good	0.191 \| good
2026-01-21T22:00:00.000Z	38 \| good	6.87 \| good	30.805 \| good	31.97 \| good	0.523 \| good	3.367 \| good	0.195 \| good
2026-01-21T23:00:00.000Z	33 \| good	5.693 \| good	25.9 \| good	32.843 \| good	0.659 \| good	3.311 \| good	0.237 \| good
2026-01-22T00:00:00.000Z	29 \| good	4.805 \| good	22.142 \| good	30.919 \| good	1.411 \| good	4.2 \| good	0.237 \| good
2026-01-22T01:00:00.000Z	32 \| good	4.607 \| good	35.164 \| good	28.096 \| good	2.017 \| good	5.951 \| good	0.321 \| good
2026-01-22T02:00:00.000Z	28 \| good	4.957 \| good	20.042 \| good	29.876 \| good	0.822 \| good	7.94 \| good	0.275 \| good
2026-01-22T03:00:00.000Z	56 \| moderate	11.824 \| good	46.392 \| good	20.911 \| good	1.228 \| good	7.237 \| good	0.237 \| good
2026-01-22T04:00:00.000Z	27 \| good	4.973 \| good	21.605 \| good	26.014 \| good	0.902 \| good	4.186 \| good	0.195 \| good
2026-01-22T05:00:00.000Z	33 \| good	5.859 \| good	24.104 \| good	25.587 \| good	0.301 \| good	4.389 \| good	0.115 \| good
2026-01-22T06:00:00.000Z	27 \| good	4.923 \| good	25.41 \| good	27.95 \| good	0.269 \| good	2.7 \| good	0.108 \| good
2026-01-22T07:00:00.000Z	25 \| good	4.421 \| good	25.168 \| good	27.26 \| good	0.27 \| good	2.698 \| good	0.115 \| good
2026-01-22T08:00:00.000Z	26 \| good	4.364 \| good	18.681 \| good	27.613 \| good	0.267 \| good	2.694 \| good	0.115 \| good
2026-01-22T09:00:00.000Z	22 \| good	2.629 \| good	14.79 \| good	24.294 \| good	0.306 \| good	2.59 \| good	0.104 \| good
2026-01-22T10:00:00.000Z	21 \| good	3.143 \| good	13.204 \| good	23.034 \| good	0.256 \| good	3.106 \| good	0.104 \| good
2026-01-22T11:00:00.000Z	27 \| good	3.178 \| good	14.113 \| good	29.014 \| good	0.374 \| good	3.967 \| good	0.1 \| good
2026-01-22T12:00:00.000Z	16 \| good	2.654 \| good	12.921 \| good	14.684 \| good	0.625 \| good	6.543 \| good	0.229 \| good
2026-01-22T13:00:00.000Z	16 \| good	3.047 \| good	13.513 \| good	16.151 \| good	0.543 \| good	8.345 \| good	0.237 \| good
2026-01-22T14:00:00.000Z	33 \| good	5.751 \| good	22.64 \| good	16.484 \| good	0.611 \| good	10.994 \| good	0.465 \| good
2026-01-22T15:00:00.000Z	33 \| good	5.71 \| good	25.592 \| good	19.281 \| good	0.773 \| good	10.795 \| good	0.408 \| good
2026-01-22T16:00:00.000Z	27 \| good	4.541 \| good	15.213 \| good	23.491 \| good	0.816 \| good	9.038 \| good	0.321 \| good
2026-01-22T17:00:00.000Z	23 \| good	3.535 \| good	14.903 \| good	24.847 \| good	0.548 \| good	7.323 \| good	0.279 \| good
2026-01-22T18:00:00.000Z	27 \| good	4.965 \| good	24.312 \| good	29.151 \| good	0.55 \| good	7.208 \| good	0.191 \| good
2026-01-22T19:00:00.000Z	29 \| good	3.676 \| good	24.219 \| good	31.326 \| good	0.319 \| good	6.505 \| good	0.191 \| good
2026-01-22T20:00:00.000Z	29 \| good	3.231 \| good	21.733 \| good	31.432 \| good	0.328 \| good	5.85 \| good	0.191 \| good
2026-01-22T21:00:00.000Z	30 \| good	2.96 \| good	11.721 \| good	32.413 \| good	0.351 \| good	4.433 \| good	0.191 \| good
2026-01-22T22:00:00.000Z	30 \| good	2.748 \| good	11.443 \| good	32.362 \| good	0.422 \| good	6.94 \| good	0.191 \| good
2026-01-22T23:00:00.000Z	29 \| good	2.867 \| good	12.601 \| good	31.015 \| good	0.463 \| good	5.167 \| good	0.195 \| good
2026-01-23T00:00:00.000Z	27 \| good	4.57 \| good	18.763 \| good	29.092 \| good	0.444 \| good	7.035 \| good	0.24 \| good
2026-01-23T01:00:00.000Z	49 \| good	9.077 \| good	35.457 \| good	25.09 \| good	0.685 \| good	11.142 \| good	0.29 \| good
2026-01-23T02:00:00.000Z	69 \| moderate	19.123 \| fine	72.997 \| fine	20.689 \| good	0.822 \| good	10.68 \| good	0.343 \| good
2026-01-23T03:00:00.000Z	66 \| moderate	16.672 \| fine	62.513 \| fine	14.49 \| good	0.742 \| good	10.785 \| good	0.339 \| good
2026-01-23T04:00:00.000Z	66 \| moderate	16.843 \| fine	75.419 \| fine	15.252 \| good	0.859 \| good	14.571 \| good	0.513 \| good
2026-01-23T05:00:00.000Z	66 \| moderate	16.843 \| fine	75.419 \| fine	15.252 \| good	0.859 \| good	14.571 \| good	0.513 \| good
2026-01-23T06:00:00.000Z	33 \| good	6.173 \| good	27.585 \| good	19.84 \| good	0.67 \| good	6.734 \| good	0.199 \| good
2026-01-23T07:00:00.000Z	38 \| good	6.672 \| good	29.802 \| good	20.905 \| good	0.572 \| good	4.847 \| good	0.18 \| good
2026-01-23T08:00:00.000Z	38 \| good	7.323 \| good	32.223 \| good	21.603 \| good	0.473 \| good	2.96 \| good	0.161 \| good
2026-01-23T09:00:00.000Z	38 \| good	7.035 \| good	31.212 \| good	21.818 \| good	0.375 \| good	1.073 \| good	0.141 \| good
2026-01-23T10:00:00.000Z	27 \| good	5.026 \| good	21.554 \| good	20.34 \| good	0.353 \| good	1.069 \| good	0.14 \| good
2026-01-23T11:00:00.000Z	27 \| good	4.677 \| good	20.295 \| good	19.543 \| good	0.331 \| good	1.065 \| good	0.138 \| good
2026-01-23T12:00:00.000Z	22 \| good	3.624 \| good	15.994 \| good	18.575 \| good	0.308 \| good	1.062 \| good	0.137 \| good
2026-01-23T13:00:00.000Z	22 \| good	4.39 \| good	19.295 \| good	22.171 \| good	0.324 \| good	1.205 \| good	0.14 \| good
2026-01-23T14:00:00.000Z	22 \| good	4.482 \| good	19.513 \| good	21.045 \| good	0.34 \| good	1.348 \| good	0.142 \| good
2026-01-23T15:00:00.000Z	22 \| good	4.082 \| good	17.813 \| good	18.105 \| good	0.356 \| good	1.492 \| good	0.145 \| good
2026-01-23T16:00:00.000Z	16 \| good	3.373 \| good	14.623 \| good	17.172 \| good	0.404 \| good	1.427 \| good	0.145 \| good
2026-01-23T17:00:00.000Z	18 \| good	3.179 \| good	13.072 \| good	18.968 \| good	0.452 \| good	1.362 \| good	0.144 \| good
2026-01-23T18:00:00.000Z	22 \| good	4.186 \| good	18.483 \| good	21.285 \| good	0.499 \| good	1.298 \| good	0.144 \| good
2026-01-23T19:00:00.000Z	27 \| good	5.07 \| good	22.214 \| good	24.34 \| good	0.548 \| good	1.476 \| good	0.145 \| good
2026-01-23T20:00:00.000Z	33 \| good	5.657 \| good	24.805 \| good	23.638 \| good	0.597 \| good	1.655 \| good	0.145 \| good
2026-01-23T21:00:00.000Z	27 \| good	4.818 \| good	21.015 \| good	26.621 \| good	0.647 \| good	1.833 \| good	0.146 \| good
2026-01-23T22:00:00.000Z	22 \| good	3.367 \| good	14.234 \| good	23.645 \| good	0.687 \| good	2.511 \| good	0.148 \| good
2026-01-23T23:00:00.000Z	20 \| good	2.089 \| good	8.481 \| good	21.995 \| good	0.727 \| good	3.19 \| good	0.15 \| good
2026-01-24T00:00:00.000Z	16 \| good	1.646 \| good	6.753 \| good	17.195 \| good	0.767 \| good	3.868 \| good	0.152 \| good
2026-01-24T01:00:00.000Z	14 \| good	2.229 \| good	9.13 \| good	14.572 \| good	0.789 \| good	3.808 \| good	0.152 \| good
2026-01-24T02:00:00.000Z	22 \| good	3.598 \| good	15.919 \| good	11.366 \| good	0.811 \| good	3.749 \| good	0.151 \| good
2026-01-24T03:00:00.000Z	27 \| good	4.811 \| good	20.811 \| good	14.317 \| good	0.834 \| good	3.69 \| good	0.151 \| good
2026-01-24T04:00:00.000Z	22 \| good	3.956 \| good	17.368 \| good	16.242 \| good	0.779 \| good	3.419 \| good	0.151 \| good
2026-01-24T05:00:00.000Z	22 \| good	4.116 \| good	17.918 \| good	15.715 \| good	0.724 \| good	3.149 \| good	0.15 \| good
2026-01-24T06:00:00.000Z	27 \| good	4.616 \| good	20.027 \| good	14.608 \| good	0.669 \| good	2.879 \| good	0.15 \| good
2026-01-24T07:00:00.000Z	33 \| good	5.819 \| good	25.555 \| good	16.435 \| good	0.607 \| good	2.661 \| good	0.15 \| good
2026-01-24T08:00:00.000Z	33 \| good	6.318 \| good	27.827 \| good	18.357 \| good	0.545 \| good	2.443 \| good	0.149 \| good
2026-01-24T09:00:00.000Z	33 \| good	5.654 \| good	24.403 \| good	19.166 \| good	0.483 \| good	2.225 \| good	0.149 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.08 \| good	21.872 \| good	21.562 \| good	0.504 \| good	2.275 \| good	0.149 \| good
2026-01-24T11:00:00.000Z	27 \| good	4.847 \| good	20.944 \| good	21.867 \| good	0.525 \| good	2.326 \| good	0.15 \| good
2026-01-24T12:00:00.000Z	27 \| good	5.383 \| good	23 \| good	22.003 \| good	0.546 \| good	2.376 \| good	0.151 \| good
2026-01-24T13:00:00.000Z	38 \| good	7.3 \| good	32.239 \| good	23.617 \| good	0.624 \| good	2.842 \| good	0.156 \| good
2026-01-24T14:00:00.000Z	44 \| good	7.863 \| good	34.385 \| good	22.598 \| good	0.701 \| good	3.308 \| good	0.161 \| good
2026-01-24T15:00:00.000Z	44 \| good	8.183 \| good	35.939 \| good	20.264 \| good	0.779 \| good	3.774 \| good	0.167 \| good
2026-01-24T16:00:00.000Z	38 \| good	6.802 \| good	30.462 \| good	20.088 \| good	0.82 \| good	3.566 \| good	0.168 \| good
2026-01-24T17:00:00.000Z	27 \| good	4.925 \| good	21.074 \| good	22.156 \| good	0.861 \| good	3.359 \| good	0.17 \| good
2026-01-24T18:00:00.000Z	33 \| good	5.834 \| good	25.215 \| good	23.07 \| good	0.903 \| good	3.151 \| good	0.172 \| good
2026-01-24T19:00:00.000Z	44 \| good	7.817 \| good	34.508 \| good	22.836 \| good	0.885 \| good	3.606 \| good	0.174 \| good
2026-01-24T20:00:00.000Z	52 \| moderate	9.552 \| good	42.665 \| good	24.495 \| good	0.868 \| good	4.06 \| good	0.176 \| good
2026-01-24T21:00:00.000Z	49 \| good	9.228 \| good	41.366 \| good	26.605 \| good	0.85 \| good	4.515 \| good	0.178 \| good
2026-01-24T22:00:00.000Z	33 \| good	6.14 \| good	27.109 \| good	26.225 \| good	0.766 \| good	5.215 \| good	0.18 \| good
2026-01-24T23:00:00.000Z	27 \| good	4.673 \| good	20.519 \| good	23.718 \| good	0.683 \| good	5.915 \| good	0.181 \| good
2026-01-25T00:00:00.000Z	38 \| good	6.776 \| good	7.044 \| good	25.568 \| good	0.597 \| good	6.584 \| good	0.183 \| good
2026-01-25T01:00:00.000Z	22 \| good	3.852 \| good	16.776 \| good	19.739 \| good	0.571 \| good	6.312 \| good	0.181 \| good
2026-01-25T02:00:00.000Z	33 \| good	6.144 \| good	27.173 \| good	17.21 \| good	0.542 \| good	6.01 \| good	0.18 \| good
2026-01-25T03:00:00.000Z	44 \| good	8.108 \| good	35.54 \| good	16.068 \| good	0.514 \| good	5.707 \| good	0.178 \| good
2026-01-25T04:00:00.000Z	44 \| good	7.827 \| good	34.163 \| good	16.46 \| good	0.492 \| good	5.296 \| good	0.177 \| good
2026-01-25T05:00:00.000Z	44 \| good	8.156 \| good	35.724 \| good	16.52 \| good	0.47 \| good	4.886 \| good	0.175 \| good

Alton

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Alton, Illinois

0.56ppm

How accurate is Illinois, USA air quality data?

The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for Alton, Illinois get updated?

Air quality updates for Alton, Illinois are available every hour.

What time in the past 24 hours saw the poorest air quality in Alton, Illinois?

Alton, Illinois experienced its worst air quality at 02:00:00, 2026-01-23.

When was air quality in Alton, Illinois the best over the past 24 hours?

The best air quality in Alton, Illinois was observed at 01:00:00 on 2026-01-22.

What is the air quality in Alton, Illinois right now?

The air quality in Alton, Illinois right now is Moderate, with an AQI of 66.

What pollutant is most frequently found in Alton, Illinois?

In Alton, Illinois, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in Alton, Illinois is poor?

When air quality in Alton, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Alton, Illinois right now?

Alton, Illinois currently has a PM_2.5 concentration of 16.843 μg/m³.

What is the current level of PM₁₀ in Alton, Illinois?

Alton, Illinois currently has a PM₁₀ concentration of 75.419 μg/m³.

What is the current level of carbon monoxide (CO) in Alton, Illinois?

The current carbon monoxide (CO) level in Alton, Illinois is 0.513 ppm.

What is the current level of sulfur dioxide (SO₂) in Alton, Illinois?

The current sulfur dioxide (SO₂) concentration in Alton, Illinois is 0.859 ppb.

What is the current level of ozone (O₃) in Alton, Illinois?

Alton, Illinois currently has an ozone (O₃) concentration of 15.252 ppm.

What is the current level of nitrogen dioxide (NO₂) in Alton, Illinois?

The current level of nitrogen dioxide (NO₂) in Alton, Illinois is 14.571 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T06:00:00.000Z	62 \| moderate	14.796 \| fine	57.046 \| fine	27.94 \| good	1.095 \| good	8.117 \| good	0.256 \| good
2026-01-21T07:00:00.000Z	60 \| moderate	14.447 \| fine	53.612 \| good	26.067 \| good	1.094 \| good	8.103 \| good	0.252 \| good
2026-01-21T08:00:00.000Z	62 \| moderate	15.421 \| fine	59.475 \| fine	26.483 \| good	1.122 \| good	8.091 \| good	0.241 \| good
2026-01-21T09:00:00.000Z	62 \| moderate	14.887 \| fine	58.266 \| fine	24.086 \| good	1.121 \| good	6.712 \| good	0.203 \| good
2026-01-21T10:00:00.000Z	58 \| moderate	13.215 \| fine	47.224 \| good	26.133 \| good	1.911 \| good	5.044 \| good	0.203 \| good
2026-01-21T11:00:00.000Z	54 \| moderate	11.198 \| good	47.661 \| good	20.484 \| good	2.087 \| good	5.103 \| good	0.203 \| good
2026-01-21T12:00:00.000Z	52 \| moderate	9.755 \| good	41.985 \| good	24.337 \| good	2.894 \| good	5.545 \| good	0.195 \| good
2026-01-21T13:00:00.000Z	54 \| moderate	10.527 \| good	42.601 \| good	22.91 \| good	2.537 \| good	7.904 \| good	0.237 \| good
2026-01-21T14:00:00.000Z	56 \| moderate	11.825 \| good	55.408 \| fine	23.556 \| good	2.738 \| good	9.621 \| good	0.324 \| good
2026-01-21T15:00:00.000Z	56 \| moderate	12.316 \| fine	54.839 \| good	26.584 \| good	2.397 \| good	8.675 \| good	0.324 \| good
2026-01-21T16:00:00.000Z	60 \| moderate	14.381 \| fine	65.782 \| fine	28.41 \| good	1.741 \| good	5.537 \| good	0.233 \| good
2026-01-21T17:00:00.000Z	62 \| moderate	14.928 \| fine	66.178 \| fine	26.995 \| good	0.933 \| good	4.48 \| good	0.237 \| good
2026-01-21T18:00:00.000Z	60 \| moderate	14.079 \| fine	62.034 \| fine	29.456 \| good	1.008 \| good	4.363 \| good	0.233 \| good
2026-01-21T19:00:00.000Z	58 \| moderate	13.369 \| fine	56.536 \| fine	29.055 \| good	2.567 \| good	4.04 \| good	0.233 \| good
2026-01-21T20:00:00.000Z	52 \| moderate	10.364 \| good	44.169 \| good	28.133 \| good	0.666 \| good	3.848 \| good	0.233 \| good
2026-01-21T21:00:00.000Z	49 \| good	8.776 \| good	38.77 \| good	30.595 \| good	0.518 \| good	3.26 \| good	0.191 \| good
2026-01-21T22:00:00.000Z	38 \| good	6.87 \| good	30.805 \| good	31.97 \| good	0.523 \| good	3.367 \| good	0.195 \| good
2026-01-21T23:00:00.000Z	33 \| good	5.693 \| good	25.9 \| good	32.843 \| good	0.659 \| good	3.311 \| good	0.237 \| good
2026-01-22T00:00:00.000Z	29 \| good	4.805 \| good	22.142 \| good	30.919 \| good	1.411 \| good	4.2 \| good	0.237 \| good
2026-01-22T01:00:00.000Z	32 \| good	4.607 \| good	35.164 \| good	28.096 \| good	2.017 \| good	5.951 \| good	0.321 \| good
2026-01-22T02:00:00.000Z	28 \| good	4.957 \| good	20.042 \| good	29.876 \| good	0.822 \| good	7.94 \| good	0.275 \| good
2026-01-22T03:00:00.000Z	56 \| moderate	11.824 \| good	46.392 \| good	20.911 \| good	1.228 \| good	7.237 \| good	0.237 \| good
2026-01-22T04:00:00.000Z	27 \| good	4.973 \| good	21.605 \| good	26.014 \| good	0.902 \| good	4.186 \| good	0.195 \| good
2026-01-22T05:00:00.000Z	33 \| good	5.859 \| good	24.104 \| good	25.587 \| good	0.301 \| good	4.389 \| good	0.115 \| good
2026-01-22T06:00:00.000Z	27 \| good	4.923 \| good	25.41 \| good	27.95 \| good	0.269 \| good	2.7 \| good	0.108 \| good
2026-01-22T07:00:00.000Z	25 \| good	4.421 \| good	25.168 \| good	27.26 \| good	0.27 \| good	2.698 \| good	0.115 \| good
2026-01-22T08:00:00.000Z	26 \| good	4.364 \| good	18.681 \| good	27.613 \| good	0.267 \| good	2.694 \| good	0.115 \| good
2026-01-22T09:00:00.000Z	22 \| good	2.629 \| good	14.79 \| good	24.294 \| good	0.306 \| good	2.59 \| good	0.104 \| good
2026-01-22T10:00:00.000Z	21 \| good	3.143 \| good	13.204 \| good	23.034 \| good	0.256 \| good	3.106 \| good	0.104 \| good
2026-01-22T11:00:00.000Z	27 \| good	3.178 \| good	14.113 \| good	29.014 \| good	0.374 \| good	3.967 \| good	0.1 \| good
2026-01-22T12:00:00.000Z	16 \| good	2.654 \| good	12.921 \| good	14.684 \| good	0.625 \| good	6.543 \| good	0.229 \| good
2026-01-22T13:00:00.000Z	16 \| good	3.047 \| good	13.513 \| good	16.151 \| good	0.543 \| good	8.345 \| good	0.237 \| good
2026-01-22T14:00:00.000Z	33 \| good	5.751 \| good	22.64 \| good	16.484 \| good	0.611 \| good	10.994 \| good	0.465 \| good
2026-01-22T15:00:00.000Z	33 \| good	5.71 \| good	25.592 \| good	19.281 \| good	0.773 \| good	10.795 \| good	0.408 \| good
2026-01-22T16:00:00.000Z	27 \| good	4.541 \| good	15.213 \| good	23.491 \| good	0.816 \| good	9.038 \| good	0.321 \| good
2026-01-22T17:00:00.000Z	23 \| good	3.535 \| good	14.903 \| good	24.847 \| good	0.548 \| good	7.323 \| good	0.279 \| good
2026-01-22T18:00:00.000Z	27 \| good	4.965 \| good	24.312 \| good	29.151 \| good	0.55 \| good	7.208 \| good	0.191 \| good
2026-01-22T19:00:00.000Z	29 \| good	3.676 \| good	24.219 \| good	31.326 \| good	0.319 \| good	6.505 \| good	0.191 \| good
2026-01-22T20:00:00.000Z	29 \| good	3.231 \| good	21.733 \| good	31.432 \| good	0.328 \| good	5.85 \| good	0.191 \| good
2026-01-22T21:00:00.000Z	30 \| good	2.96 \| good	11.721 \| good	32.413 \| good	0.351 \| good	4.433 \| good	0.191 \| good
2026-01-22T22:00:00.000Z	30 \| good	2.748 \| good	11.443 \| good	32.362 \| good	0.422 \| good	6.94 \| good	0.191 \| good
2026-01-22T23:00:00.000Z	29 \| good	2.867 \| good	12.601 \| good	31.015 \| good	0.463 \| good	5.167 \| good	0.195 \| good
2026-01-23T00:00:00.000Z	27 \| good	4.57 \| good	18.763 \| good	29.092 \| good	0.444 \| good	7.035 \| good	0.24 \| good
2026-01-23T01:00:00.000Z	49 \| good	9.077 \| good	35.457 \| good	25.09 \| good	0.685 \| good	11.142 \| good	0.29 \| good
2026-01-23T02:00:00.000Z	69 \| moderate	19.123 \| fine	72.997 \| fine	20.689 \| good	0.822 \| good	10.68 \| good	0.343 \| good
2026-01-23T03:00:00.000Z	66 \| moderate	16.672 \| fine	62.513 \| fine	14.49 \| good	0.742 \| good	10.785 \| good	0.339 \| good
2026-01-23T04:00:00.000Z	66 \| moderate	16.843 \| fine	75.419 \| fine	15.252 \| good	0.859 \| good	14.571 \| good	0.513 \| good
2026-01-23T05:00:00.000Z	66 \| moderate	16.843 \| fine	75.419 \| fine	15.252 \| good	0.859 \| good	14.571 \| good	0.513 \| good
2026-01-23T06:00:00.000Z	33 \| good	6.173 \| good	27.585 \| good	19.84 \| good	0.67 \| good	6.734 \| good	0.199 \| good
2026-01-23T07:00:00.000Z	38 \| good	6.672 \| good	29.802 \| good	20.905 \| good	0.572 \| good	4.847 \| good	0.18 \| good
2026-01-23T08:00:00.000Z	38 \| good	7.323 \| good	32.223 \| good	21.603 \| good	0.473 \| good	2.96 \| good	0.161 \| good
2026-01-23T09:00:00.000Z	38 \| good	7.035 \| good	31.212 \| good	21.818 \| good	0.375 \| good	1.073 \| good	0.141 \| good
2026-01-23T10:00:00.000Z	27 \| good	5.026 \| good	21.554 \| good	20.34 \| good	0.353 \| good	1.069 \| good	0.14 \| good
2026-01-23T11:00:00.000Z	27 \| good	4.677 \| good	20.295 \| good	19.543 \| good	0.331 \| good	1.065 \| good	0.138 \| good
2026-01-23T12:00:00.000Z	22 \| good	3.624 \| good	15.994 \| good	18.575 \| good	0.308 \| good	1.062 \| good	0.137 \| good
2026-01-23T13:00:00.000Z	22 \| good	4.39 \| good	19.295 \| good	22.171 \| good	0.324 \| good	1.205 \| good	0.14 \| good
2026-01-23T14:00:00.000Z	22 \| good	4.482 \| good	19.513 \| good	21.045 \| good	0.34 \| good	1.348 \| good	0.142 \| good
2026-01-23T15:00:00.000Z	22 \| good	4.082 \| good	17.813 \| good	18.105 \| good	0.356 \| good	1.492 \| good	0.145 \| good
2026-01-23T16:00:00.000Z	16 \| good	3.373 \| good	14.623 \| good	17.172 \| good	0.404 \| good	1.427 \| good	0.145 \| good
2026-01-23T17:00:00.000Z	18 \| good	3.179 \| good	13.072 \| good	18.968 \| good	0.452 \| good	1.362 \| good	0.144 \| good
2026-01-23T18:00:00.000Z	22 \| good	4.186 \| good	18.483 \| good	21.285 \| good	0.499 \| good	1.298 \| good	0.144 \| good
2026-01-23T19:00:00.000Z	27 \| good	5.07 \| good	22.214 \| good	24.34 \| good	0.548 \| good	1.476 \| good	0.145 \| good
2026-01-23T20:00:00.000Z	33 \| good	5.657 \| good	24.805 \| good	23.638 \| good	0.597 \| good	1.655 \| good	0.145 \| good
2026-01-23T21:00:00.000Z	27 \| good	4.818 \| good	21.015 \| good	26.621 \| good	0.647 \| good	1.833 \| good	0.146 \| good
2026-01-23T22:00:00.000Z	22 \| good	3.367 \| good	14.234 \| good	23.645 \| good	0.687 \| good	2.511 \| good	0.148 \| good
2026-01-23T23:00:00.000Z	20 \| good	2.089 \| good	8.481 \| good	21.995 \| good	0.727 \| good	3.19 \| good	0.15 \| good
2026-01-24T00:00:00.000Z	16 \| good	1.646 \| good	6.753 \| good	17.195 \| good	0.767 \| good	3.868 \| good	0.152 \| good
2026-01-24T01:00:00.000Z	14 \| good	2.229 \| good	9.13 \| good	14.572 \| good	0.789 \| good	3.808 \| good	0.152 \| good
2026-01-24T02:00:00.000Z	22 \| good	3.598 \| good	15.919 \| good	11.366 \| good	0.811 \| good	3.749 \| good	0.151 \| good
2026-01-24T03:00:00.000Z	27 \| good	4.811 \| good	20.811 \| good	14.317 \| good	0.834 \| good	3.69 \| good	0.151 \| good
2026-01-24T04:00:00.000Z	22 \| good	3.956 \| good	17.368 \| good	16.242 \| good	0.779 \| good	3.419 \| good	0.151 \| good
2026-01-24T05:00:00.000Z	22 \| good	4.116 \| good	17.918 \| good	15.715 \| good	0.724 \| good	3.149 \| good	0.15 \| good
2026-01-24T06:00:00.000Z	27 \| good	4.616 \| good	20.027 \| good	14.608 \| good	0.669 \| good	2.879 \| good	0.15 \| good
2026-01-24T07:00:00.000Z	33 \| good	5.819 \| good	25.555 \| good	16.435 \| good	0.607 \| good	2.661 \| good	0.15 \| good
2026-01-24T08:00:00.000Z	33 \| good	6.318 \| good	27.827 \| good	18.357 \| good	0.545 \| good	2.443 \| good	0.149 \| good
2026-01-24T09:00:00.000Z	33 \| good	5.654 \| good	24.403 \| good	19.166 \| good	0.483 \| good	2.225 \| good	0.149 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.08 \| good	21.872 \| good	21.562 \| good	0.504 \| good	2.275 \| good	0.149 \| good
2026-01-24T11:00:00.000Z	27 \| good	4.847 \| good	20.944 \| good	21.867 \| good	0.525 \| good	2.326 \| good	0.15 \| good
2026-01-24T12:00:00.000Z	27 \| good	5.383 \| good	23 \| good	22.003 \| good	0.546 \| good	2.376 \| good	0.151 \| good
2026-01-24T13:00:00.000Z	38 \| good	7.3 \| good	32.239 \| good	23.617 \| good	0.624 \| good	2.842 \| good	0.156 \| good
2026-01-24T14:00:00.000Z	44 \| good	7.863 \| good	34.385 \| good	22.598 \| good	0.701 \| good	3.308 \| good	0.161 \| good
2026-01-24T15:00:00.000Z	44 \| good	8.183 \| good	35.939 \| good	20.264 \| good	0.779 \| good	3.774 \| good	0.167 \| good
2026-01-24T16:00:00.000Z	38 \| good	6.802 \| good	30.462 \| good	20.088 \| good	0.82 \| good	3.566 \| good	0.168 \| good
2026-01-24T17:00:00.000Z	27 \| good	4.925 \| good	21.074 \| good	22.156 \| good	0.861 \| good	3.359 \| good	0.17 \| good
2026-01-24T18:00:00.000Z	33 \| good	5.834 \| good	25.215 \| good	23.07 \| good	0.903 \| good	3.151 \| good	0.172 \| good
2026-01-24T19:00:00.000Z	44 \| good	7.817 \| good	34.508 \| good	22.836 \| good	0.885 \| good	3.606 \| good	0.174 \| good
2026-01-24T20:00:00.000Z	52 \| moderate	9.552 \| good	42.665 \| good	24.495 \| good	0.868 \| good	4.06 \| good	0.176 \| good
2026-01-24T21:00:00.000Z	49 \| good	9.228 \| good	41.366 \| good	26.605 \| good	0.85 \| good	4.515 \| good	0.178 \| good
2026-01-24T22:00:00.000Z	33 \| good	6.14 \| good	27.109 \| good	26.225 \| good	0.766 \| good	5.215 \| good	0.18 \| good
2026-01-24T23:00:00.000Z	27 \| good	4.673 \| good	20.519 \| good	23.718 \| good	0.683 \| good	5.915 \| good	0.181 \| good
2026-01-25T00:00:00.000Z	38 \| good	6.776 \| good	7.044 \| good	25.568 \| good	0.597 \| good	6.584 \| good	0.183 \| good
2026-01-25T01:00:00.000Z	22 \| good	3.852 \| good	16.776 \| good	19.739 \| good	0.571 \| good	6.312 \| good	0.181 \| good
2026-01-25T02:00:00.000Z	33 \| good	6.144 \| good	27.173 \| good	17.21 \| good	0.542 \| good	6.01 \| good	0.18 \| good
2026-01-25T03:00:00.000Z	44 \| good	8.108 \| good	35.54 \| good	16.068 \| good	0.514 \| good	5.707 \| good	0.178 \| good
2026-01-25T04:00:00.000Z	44 \| good	7.827 \| good	34.163 \| good	16.46 \| good	0.492 \| good	5.296 \| good	0.177 \| good
2026-01-25T05:00:00.000Z	44 \| good	8.156 \| good	35.724 \| good	16.52 \| good	0.47 \| good	4.886 \| good	0.175 \| good

Current air quality index in Alton, Illinois today

Common air pollutants in Alton, Illinois

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Alton, Illinois air quality forecast and history

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Real-time air quality map: Monitor AQI near Alton, Illinois

Air quality in nearby cities

Wood River, Illinois

Godfrey, Illinois

Old Jamestown, Missouri

Spanish Lake, Missouri

Florissant, Missouri

Bellefontaine Neighbors, Missouri

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Air quality levels in US

Frequently asked questions

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What is the air quality in Alton, Illinois right now?

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What is the PM2.5 concentration in Alton, Illinois right now?

What is the current level of PM10 in Alton, Illinois?

What is the current level of carbon monoxide (CO) in Alton, Illinois?

What is the current level of sulfur dioxide (SO2) in Alton, Illinois?

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Alton, Illinois right now?

What is the current level of PM₁₀ in Alton, Illinois?

What is the current level of sulfur dioxide (SO₂) in Alton, Illinois?

What is the current level of ozone (O₃) in Alton, Illinois?

What is the current level of nitrogen dioxide (NO₂) in Alton, Illinois?