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

Alton, Illinois currently has a PM10 concentration of 58.698 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Alton, Illinois is 0.916 ppb.

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

Alton, Illinois currently has an ozone (O3) concentration of 17.254 ppm.

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

The current level of nitrogen dioxide (NO2) in Alton, Illinois is 9.11 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 14.068 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)

14.07 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

58.70 μg/m³

155

255

425

605+

Ozone (O₃)

17.25 ppb

201

201+

Sulfur Dioxide (SO₂)

0.92 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.11 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 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
2025-12-05T06:00:00.000Z	49 \| good	9.455 \| good	41.842 \| good	11.709 \| good	0.977 \| good	14.058 \| good	0.241 \| good
2025-12-05T07:00:00.000Z	52 \| moderate	9.512 \| good	40.277 \| good	11.295 \| good	0.98 \| good	14.394 \| good	0.245 \| good
2025-12-05T08:00:00.000Z	49 \| good	9.305 \| good	34.907 \| good	11.723 \| good	1.168 \| good	14.055 \| good	0.241 \| good
2025-12-05T09:00:00.000Z	52 \| moderate	9.813 \| good	39.009 \| good	10.284 \| good	1.019 \| good	16.265 \| good	0.283 \| good
2025-12-05T10:00:00.000Z	54 \| moderate	10.87 \| good	44.451 \| good	8.994 \| good	0.748 \| good	17.214 \| good	0.283 \| good
2025-12-05T11:00:00.000Z	56 \| moderate	11.751 \| good	51.171 \| good	7.449 \| good	1.252 \| good	15.615 \| good	0.324 \| good
2025-12-05T12:00:00.000Z	60 \| moderate	13.708 \| fine	67.852 \| fine	5.626 \| good	0.944 \| good	25.963 \| good	0.37 \| good
2025-12-05T13:00:00.000Z	62 \| moderate	14.789 \| fine	67.846 \| fine	6.2 \| good	0.735 \| good	24.876 \| good	0.412 \| good
2025-12-05T14:00:00.000Z	62 \| moderate	14.75 \| fine	58.454 \| fine	8.139 \| good	1.457 \| good	23.113 \| good	0.479 \| good
2025-12-05T15:00:00.000Z	62 \| moderate	15.032 \| fine	60.901 \| fine	8.658 \| good	2.209 \| good	21.298 \| good	0.378 \| good
2025-12-05T16:00:00.000Z	69 \| moderate	18.686 \| fine	60.684 \| fine	11.924 \| good	0.72 \| good	20.071 \| good	0.332 \| good
2025-12-05T17:00:00.000Z	69 \| moderate	19.332 \| fine	81.112 \| fine	14.794 \| good	0.943 \| good	17.12 \| good	0.37 \| good
2025-12-05T18:00:00.000Z	66 \| moderate	17.306 \| fine	69.305 \| fine	21.514 \| good	1.915 \| good	13.792 \| good	0.324 \| good
2025-12-05T19:00:00.000Z	67 \| moderate	17.595 \| fine	70.891 \| fine	20.593 \| good	0.964 \| good	11.194 \| good	0.279 \| good
2025-12-05T20:00:00.000Z	66 \| moderate	17.373 \| fine	74.072 \| fine	23.372 \| good	1.432 \| good	12.201 \| good	0.283 \| good
2025-12-05T21:00:00.000Z	58 \| moderate	13.088 \| fine	54.796 \| good	20.545 \| good	1.639 \| good	10.09 \| good	0.279 \| good
2025-12-05T22:00:00.000Z	52 \| moderate	9.919 \| good	41.888 \| good	16.204 \| good	0.845 \| good	10.886 \| good	0.283 \| good
2025-12-05T23:00:00.000Z	52 \| moderate	9.58 \| good	43.607 \| good	14.994 \| good	0.63 \| good	13.033 \| good	0.366 \| good
2025-12-06T00:00:00.000Z	52 \| moderate	9.777 \| good	49.959 \| good	12.361 \| good	0.724 \| good	14.333 \| good	0.416 \| good
2025-12-06T01:00:00.000Z	52 \| moderate	10.356 \| good	50.632 \| good	11.714 \| good	0.648 \| good	15.837 \| good	0.37 \| good
2025-12-06T02:00:00.000Z	52 \| moderate	9.908 \| good	48.792 \| good	9.943 \| good	1.352 \| good	17.747 \| good	0.37 \| good
2025-12-06T03:00:00.000Z	54 \| moderate	10.835 \| good	47.089 \| good	10.625 \| good	1.354 \| good	16.969 \| good	0.286 \| good
2025-12-06T04:00:00.000Z	54 \| moderate	11.293 \| good	52.356 \| good	12.583 \| good	1.633 \| good	16.937 \| good	0.286 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	11.706 \| good	44.16 \| good	17.918 \| good	1.809 \| good	15.318 \| good	0.332 \| good
2025-12-06T06:00:00.000Z	54 \| moderate	11.277 \| good	47.201 \| good	18.358 \| good	0.668 \| good	12.852 \| good	0.244 \| good
2025-12-06T07:00:00.000Z	54 \| moderate	10.812 \| good	36.462 \| good	18.103 \| good	0.664 \| good	12.961 \| good	0.237 \| good
2025-12-06T08:00:00.000Z	56 \| moderate	11.986 \| good	55.572 \| fine	15.948 \| good	0.665 \| good	13.096 \| good	0.237 \| good
2025-12-06T09:00:00.000Z	58 \| moderate	12.59 \| fine	56.586 \| fine	9.769 \| good	0.619 \| good	6.409 \| good	0.237 \| good
2025-12-06T10:00:00.000Z	58 \| moderate	12.854 \| fine	57.684 \| fine	11.085 \| good	0.561 \| good	6.287 \| good	0.237 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	13.286 \| fine	59.616 \| fine	10.833 \| good	0.522 \| good	7.043 \| good	0.282 \| good
2025-12-06T12:00:00.000Z	60 \| moderate	14.355 \| fine	57.364 \| fine	11.104 \| good	0.449 \| good	10.053 \| good	0.237 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	14.277 \| fine	54.954 \| good	8.123 \| good	0.414 \| good	7.855 \| good	0.279 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.038 \| fine	61.182 \| fine	4.532 \| good	0.458 \| good	7.768 \| good	0.324 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	14.643 \| fine	54.499 \| good	5.905 \| good	0.522 \| good	6.427 \| good	0.279 \| good
2025-12-06T16:00:00.000Z	69 \| moderate	18.596 \| fine	49.152 \| good	10.179 \| good	0.53 \| good	5.53 \| good	0.282 \| good
2025-12-06T17:00:00.000Z	62 \| moderate	15.44 \| fine	43.881 \| good	15.201 \| good	1.261 \| good	5.084 \| good	0.282 \| good
2025-12-06T18:00:00.000Z	60 \| moderate	13.554 \| fine	51.233 \| good	17.47 \| good	1.731 \| good	4.604 \| good	0.282 \| good
2025-12-06T19:00:00.000Z	56 \| moderate	12.058 \| good	43.757 \| good	19.585 \| good	3.922 \| good	4.608 \| good	0.286 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	12.498 \| fine	52.745 \| good	21.207 \| good	2.355 \| good	7.647 \| good	0.275 \| good
2025-12-06T21:00:00.000Z	58 \| moderate	12.618 \| fine	54.046 \| good	22.048 \| good	1.555 \| good	8.672 \| good	0.233 \| good
2025-12-06T22:00:00.000Z	58 \| moderate	13.186 \| fine	56.522 \| fine	19.525 \| good	1.19 \| good	9.63 \| good	0.324 \| good
2025-12-06T23:00:00.000Z	56 \| moderate	12.39 \| fine	45.839 \| good	20.281 \| good	0.755 \| good	11.914 \| good	0.328 \| good
2025-12-07T00:00:00.000Z	60 \| moderate	13.51 \| fine	62.511 \| fine	18.207 \| good	0.952 \| good	14.34 \| good	0.328 \| good
2025-12-07T01:00:00.000Z	60 \| moderate	13.631 \| fine	54.771 \| good	20.231 \| good	1.075 \| good	11.285 \| good	0.282 \| good
2025-12-07T02:00:00.000Z	58 \| moderate	13.277 \| fine	58.876 \| fine	16.451 \| good	1.055 \| good	11.112 \| good	0.29 \| good
2025-12-07T03:00:00.000Z	58 \| moderate	12.764 \| fine	51.397 \| good	15.755 \| good	0.773 \| good	8.943 \| good	0.241 \| good
2025-12-07T04:00:00.000Z	56 \| moderate	11.888 \| good	53.851 \| good	18.331 \| good	0.772 \| good	8.935 \| good	0.241 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.068 \| fine	58.698 \| fine	17.254 \| good	0.916 \| good	9.11 \| good	0.29 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.068 \| fine	58.698 \| fine	17.254 \| good	0.916 \| good	9.11 \| good	0.29 \| good
2025-12-07T06:00:00.000Z	64 \| moderate	16.053 \| fine	71.848 \| fine	12.999 \| good	0.735 \| good	7.51 \| good	0.222 \| good
2025-12-07T07:00:00.000Z	62 \| moderate	15.38 \| fine	68.663 \| fine	12.707 \| good	0.704 \| good	6.964 \| good	0.218 \| good
2025-12-07T08:00:00.000Z	62 \| moderate	15.336 \| fine	68.555 \| fine	9.937 \| good	0.673 \| good	6.418 \| good	0.215 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.129 \| fine	68.119 \| fine	7.303 \| good	0.642 \| good	5.872 \| good	0.211 \| good
2025-12-07T10:00:00.000Z	62 \| moderate	15.475 \| fine	68.773 \| fine	5.62 \| good	0.67 \| good	6.577 \| good	0.215 \| good
2025-12-07T11:00:00.000Z	66 \| moderate	17.153 \| fine	75.855 \| fine	2.461 \| good	0.698 \| good	7.283 \| good	0.219 \| good
2025-12-07T12:00:00.000Z	66 \| moderate	16.623 \| fine	73.912 \| fine	2.252 \| good	0.725 \| good	7.989 \| good	0.223 \| good
2025-12-07T13:00:00.000Z	69 \| moderate	18.518 \| fine	82.055 \| fine	5.689 \| good	0.8 \| good	9.236 \| good	0.251 \| good
2025-12-07T14:00:00.000Z	71 \| moderate	19.892 \| fine	87.696 \| fine	8.928 \| good	0.875 \| good	10.483 \| good	0.279 \| good
2025-12-07T15:00:00.000Z	71 \| moderate	20.035 \| fine	87.962 \| fine	19.338 \| good	0.95 \| good	11.729 \| good	0.307 \| good
2025-12-07T16:00:00.000Z	71 \| moderate	20.108 \| fine	88.838 \| fine	20.151 \| good	0.862 \| good	9.785 \| good	0.282 \| good
2025-12-07T17:00:00.000Z	75 \| moderate	22.404 \| fine	98.244 \| fine	17.956 \| good	0.775 \| good	7.84 \| good	0.257 \| good
2025-12-07T18:00:00.000Z	77 \| moderate	23.436 \| fine	102.409 \| fine	18.738 \| good	0.688 \| good	5.896 \| good	0.233 \| good
2025-12-07T19:00:00.000Z	69 \| moderate	18.782 \| fine	82.998 \| fine	22.373 \| good	0.86 \| good	6.578 \| good	0.232 \| good
2025-12-07T20:00:00.000Z	64 \| moderate	15.641 \| fine	69.811 \| fine	20.934 \| good	1.031 \| good	7.259 \| good	0.232 \| good
2025-12-07T21:00:00.000Z	56 \| moderate	11.978 \| good	53.732 \| good	19.699 \| good	1.203 \| good	7.941 \| good	0.232 \| good
2025-12-07T22:00:00.000Z	52 \| moderate	9.566 \| good	42.644 \| good	19.428 \| good	1.092 \| good	7.552 \| good	0.226 \| good
2025-12-07T23:00:00.000Z	49 \| good	9.058 \| good	39.793 \| good	20.787 \| good	0.981 \| good	7.164 \| good	0.22 \| good
2025-12-08T00:00:00.000Z	38 \| good	7.244 \| good	31.994 \| good	18.311 \| good	0.87 \| good	6.775 \| good	0.215 \| good
2025-12-08T01:00:00.000Z	38 \| good	6.923 \| good	30.484 \| good	16.011 \| good	0.802 \| good	5.972 \| good	0.211 \| good
2025-12-08T02:00:00.000Z	44 \| good	8.11 \| good	35.412 \| good	13.298 \| good	0.735 \| good	5.169 \| good	0.207 \| good
2025-12-08T03:00:00.000Z	49 \| good	8.743 \| good	38.31 \| good	14.902 \| good	0.668 \| good	4.366 \| good	0.203 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	9.546 \| good	42.641 \| good	17.572 \| good	0.652 \| good	4.251 \| good	0.202 \| good
2025-12-08T05:00:00.000Z	52 \| moderate	9.743 \| good	43.574 \| good	20.279 \| good	0.635 \| good	4.136 \| good	0.201 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.28 \| good	41.147 \| good	17.591 \| good	0.619 \| good	4.021 \| good	0.199 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.803 \| good	43.462 \| good	16.241 \| good	0.597 \| good	3.944 \| good	0.197 \| good
2025-12-08T08:00:00.000Z	49 \| good	9.201 \| good	40.953 \| good	16.19 \| good	0.574 \| good	3.867 \| good	0.195 \| good
2025-12-08T09:00:00.000Z	52 \| moderate	9.712 \| good	43.175 \| good	15.986 \| good	0.552 \| good	3.791 \| good	0.193 \| good
2025-12-08T10:00:00.000Z	52 \| moderate	9.648 \| good	42.889 \| good	13.603 \| good	0.548 \| good	4.052 \| good	0.194 \| good
2025-12-08T11:00:00.000Z	44 \| good	8.308 \| good	36.423 \| good	15.023 \| good	0.543 \| good	4.313 \| good	0.195 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.528 \| good	37.275 \| good	16.341 \| good	0.539 \| good	4.575 \| good	0.196 \| good
2025-12-08T13:00:00.000Z	44 \| good	7.772 \| good	34.141 \| good	18.369 \| good	0.623 \| good	5.137 \| good	0.205 \| good
2025-12-08T14:00:00.000Z	38 \| good	7.298 \| good	31.946 \| good	19.762 \| good	0.707 \| good	5.699 \| good	0.213 \| good
2025-12-08T15:00:00.000Z	44 \| good	7.924 \| good	34.678 \| good	16.982 \| good	0.792 \| good	6.261 \| good	0.222 \| good
2025-12-08T16:00:00.000Z	44 \| good	8.449 \| good	37.212 \| good	17.741 \| good	1.052 \| good	5.735 \| good	0.214 \| good
2025-12-08T17:00:00.000Z	52 \| moderate	9.595 \| good	42.666 \| good	18.242 \| good	1.312 \| good	5.209 \| good	0.206 \| good
2025-12-08T18:00:00.000Z	52 \| moderate	10.171 \| good	45.172 \| good	19.044 \| good	1.572 \| good	4.683 \| good	0.198 \| good
2025-12-08T19:00:00.000Z	52 \| moderate	9.837 \| good	43.818 \| good	19.333 \| good	1.776 \| good	5.298 \| good	0.199 \| good
2025-12-08T20:00:00.000Z	56 \| moderate	11.641 \| good	51.873 \| good	21.741 \| good	1.98 \| good	5.913 \| good	0.201 \| good
2025-12-08T21:00:00.000Z	56 \| moderate	11.824 \| good	52.793 \| good	21.711 \| good	2.184 \| good	6.527 \| good	0.202 \| good
2025-12-08T22:00:00.000Z	56 \| moderate	11.946 \| good	52.985 \| good	18.106 \| good	2.174 \| good	12.037 \| good	0.244 \| good
2025-12-08T23:00:00.000Z	58 \| moderate	13.477 \| fine	60.405 \| fine	9.453 \| good	2.164 \| good	17.548 \| good	0.285 \| good
2025-12-09T00:00:00.000Z	67 \| moderate	18.434 \| fine	81.513 \| fine	4.247 \| good	2.154 \| good	23.058 \| good	0.327 \| good
2025-12-09T01:00:00.000Z	71 \| moderate	19.947 \| fine	87.665 \| fine	0.9 \| good	2.288 \| good	20.333 \| good	0.308 \| good
2025-12-09T02:00:00.000Z	67 \| moderate	17.958 \| fine	79.387 \| fine	0.763 \| good	2.421 \| good	17.607 \| good	0.288 \| good
2025-12-09T03:00:00.000Z	64 \| moderate	16.148 \| fine	72.456 \| fine	2.168 \| good	2.554 \| good	14.882 \| good	0.269 \| good
2025-12-09T04:00:00.000Z	62 \| moderate	15.071 \| fine	67.02 \| fine	3.716 \| good	2.206 \| good	12.217 \| good	0.25 \| good
2025-12-09T05:00:00.000Z	64 \| moderate	15.705 \| fine	69.792 \| fine	5.57 \| good	1.857 \| good	9.553 \| good	0.231 \| good

Alton

Empower business decisions with accurate air quality data

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

0.22ppm

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 04:00:00, 2025-12-06.

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

The best air quality in Alton, Illinois was observed at 07:00:00 on 2025-12-06.

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

The air quality in Alton, Illinois right now is Moderate, with an AQI of 60.

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 14.068 μg/m³.

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

Alton, Illinois currently has a PM₁₀ concentration of 58.698 μg/m³.

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

The current carbon monoxide (CO) level in Alton, Illinois is 0.29 ppm.

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

The current sulfur dioxide (SO₂) concentration in Alton, Illinois is 0.916 ppb.

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

Alton, Illinois currently has an ozone (O₃) concentration of 17.254 ppm.

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

The current level of nitrogen dioxide (NO₂) in Alton, Illinois is 9.11 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T06:00:00.000Z	49 \| good	9.455 \| good	41.842 \| good	11.709 \| good	0.977 \| good	14.058 \| good	0.241 \| good
2025-12-05T07:00:00.000Z	52 \| moderate	9.512 \| good	40.277 \| good	11.295 \| good	0.98 \| good	14.394 \| good	0.245 \| good
2025-12-05T08:00:00.000Z	49 \| good	9.305 \| good	34.907 \| good	11.723 \| good	1.168 \| good	14.055 \| good	0.241 \| good
2025-12-05T09:00:00.000Z	52 \| moderate	9.813 \| good	39.009 \| good	10.284 \| good	1.019 \| good	16.265 \| good	0.283 \| good
2025-12-05T10:00:00.000Z	54 \| moderate	10.87 \| good	44.451 \| good	8.994 \| good	0.748 \| good	17.214 \| good	0.283 \| good
2025-12-05T11:00:00.000Z	56 \| moderate	11.751 \| good	51.171 \| good	7.449 \| good	1.252 \| good	15.615 \| good	0.324 \| good
2025-12-05T12:00:00.000Z	60 \| moderate	13.708 \| fine	67.852 \| fine	5.626 \| good	0.944 \| good	25.963 \| good	0.37 \| good
2025-12-05T13:00:00.000Z	62 \| moderate	14.789 \| fine	67.846 \| fine	6.2 \| good	0.735 \| good	24.876 \| good	0.412 \| good
2025-12-05T14:00:00.000Z	62 \| moderate	14.75 \| fine	58.454 \| fine	8.139 \| good	1.457 \| good	23.113 \| good	0.479 \| good
2025-12-05T15:00:00.000Z	62 \| moderate	15.032 \| fine	60.901 \| fine	8.658 \| good	2.209 \| good	21.298 \| good	0.378 \| good
2025-12-05T16:00:00.000Z	69 \| moderate	18.686 \| fine	60.684 \| fine	11.924 \| good	0.72 \| good	20.071 \| good	0.332 \| good
2025-12-05T17:00:00.000Z	69 \| moderate	19.332 \| fine	81.112 \| fine	14.794 \| good	0.943 \| good	17.12 \| good	0.37 \| good
2025-12-05T18:00:00.000Z	66 \| moderate	17.306 \| fine	69.305 \| fine	21.514 \| good	1.915 \| good	13.792 \| good	0.324 \| good
2025-12-05T19:00:00.000Z	67 \| moderate	17.595 \| fine	70.891 \| fine	20.593 \| good	0.964 \| good	11.194 \| good	0.279 \| good
2025-12-05T20:00:00.000Z	66 \| moderate	17.373 \| fine	74.072 \| fine	23.372 \| good	1.432 \| good	12.201 \| good	0.283 \| good
2025-12-05T21:00:00.000Z	58 \| moderate	13.088 \| fine	54.796 \| good	20.545 \| good	1.639 \| good	10.09 \| good	0.279 \| good
2025-12-05T22:00:00.000Z	52 \| moderate	9.919 \| good	41.888 \| good	16.204 \| good	0.845 \| good	10.886 \| good	0.283 \| good
2025-12-05T23:00:00.000Z	52 \| moderate	9.58 \| good	43.607 \| good	14.994 \| good	0.63 \| good	13.033 \| good	0.366 \| good
2025-12-06T00:00:00.000Z	52 \| moderate	9.777 \| good	49.959 \| good	12.361 \| good	0.724 \| good	14.333 \| good	0.416 \| good
2025-12-06T01:00:00.000Z	52 \| moderate	10.356 \| good	50.632 \| good	11.714 \| good	0.648 \| good	15.837 \| good	0.37 \| good
2025-12-06T02:00:00.000Z	52 \| moderate	9.908 \| good	48.792 \| good	9.943 \| good	1.352 \| good	17.747 \| good	0.37 \| good
2025-12-06T03:00:00.000Z	54 \| moderate	10.835 \| good	47.089 \| good	10.625 \| good	1.354 \| good	16.969 \| good	0.286 \| good
2025-12-06T04:00:00.000Z	54 \| moderate	11.293 \| good	52.356 \| good	12.583 \| good	1.633 \| good	16.937 \| good	0.286 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	11.706 \| good	44.16 \| good	17.918 \| good	1.809 \| good	15.318 \| good	0.332 \| good
2025-12-06T06:00:00.000Z	54 \| moderate	11.277 \| good	47.201 \| good	18.358 \| good	0.668 \| good	12.852 \| good	0.244 \| good
2025-12-06T07:00:00.000Z	54 \| moderate	10.812 \| good	36.462 \| good	18.103 \| good	0.664 \| good	12.961 \| good	0.237 \| good
2025-12-06T08:00:00.000Z	56 \| moderate	11.986 \| good	55.572 \| fine	15.948 \| good	0.665 \| good	13.096 \| good	0.237 \| good
2025-12-06T09:00:00.000Z	58 \| moderate	12.59 \| fine	56.586 \| fine	9.769 \| good	0.619 \| good	6.409 \| good	0.237 \| good
2025-12-06T10:00:00.000Z	58 \| moderate	12.854 \| fine	57.684 \| fine	11.085 \| good	0.561 \| good	6.287 \| good	0.237 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	13.286 \| fine	59.616 \| fine	10.833 \| good	0.522 \| good	7.043 \| good	0.282 \| good
2025-12-06T12:00:00.000Z	60 \| moderate	14.355 \| fine	57.364 \| fine	11.104 \| good	0.449 \| good	10.053 \| good	0.237 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	14.277 \| fine	54.954 \| good	8.123 \| good	0.414 \| good	7.855 \| good	0.279 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.038 \| fine	61.182 \| fine	4.532 \| good	0.458 \| good	7.768 \| good	0.324 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	14.643 \| fine	54.499 \| good	5.905 \| good	0.522 \| good	6.427 \| good	0.279 \| good
2025-12-06T16:00:00.000Z	69 \| moderate	18.596 \| fine	49.152 \| good	10.179 \| good	0.53 \| good	5.53 \| good	0.282 \| good
2025-12-06T17:00:00.000Z	62 \| moderate	15.44 \| fine	43.881 \| good	15.201 \| good	1.261 \| good	5.084 \| good	0.282 \| good
2025-12-06T18:00:00.000Z	60 \| moderate	13.554 \| fine	51.233 \| good	17.47 \| good	1.731 \| good	4.604 \| good	0.282 \| good
2025-12-06T19:00:00.000Z	56 \| moderate	12.058 \| good	43.757 \| good	19.585 \| good	3.922 \| good	4.608 \| good	0.286 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	12.498 \| fine	52.745 \| good	21.207 \| good	2.355 \| good	7.647 \| good	0.275 \| good
2025-12-06T21:00:00.000Z	58 \| moderate	12.618 \| fine	54.046 \| good	22.048 \| good	1.555 \| good	8.672 \| good	0.233 \| good
2025-12-06T22:00:00.000Z	58 \| moderate	13.186 \| fine	56.522 \| fine	19.525 \| good	1.19 \| good	9.63 \| good	0.324 \| good
2025-12-06T23:00:00.000Z	56 \| moderate	12.39 \| fine	45.839 \| good	20.281 \| good	0.755 \| good	11.914 \| good	0.328 \| good
2025-12-07T00:00:00.000Z	60 \| moderate	13.51 \| fine	62.511 \| fine	18.207 \| good	0.952 \| good	14.34 \| good	0.328 \| good
2025-12-07T01:00:00.000Z	60 \| moderate	13.631 \| fine	54.771 \| good	20.231 \| good	1.075 \| good	11.285 \| good	0.282 \| good
2025-12-07T02:00:00.000Z	58 \| moderate	13.277 \| fine	58.876 \| fine	16.451 \| good	1.055 \| good	11.112 \| good	0.29 \| good
2025-12-07T03:00:00.000Z	58 \| moderate	12.764 \| fine	51.397 \| good	15.755 \| good	0.773 \| good	8.943 \| good	0.241 \| good
2025-12-07T04:00:00.000Z	56 \| moderate	11.888 \| good	53.851 \| good	18.331 \| good	0.772 \| good	8.935 \| good	0.241 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.068 \| fine	58.698 \| fine	17.254 \| good	0.916 \| good	9.11 \| good	0.29 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.068 \| fine	58.698 \| fine	17.254 \| good	0.916 \| good	9.11 \| good	0.29 \| good
2025-12-07T06:00:00.000Z	64 \| moderate	16.053 \| fine	71.848 \| fine	12.999 \| good	0.735 \| good	7.51 \| good	0.222 \| good
2025-12-07T07:00:00.000Z	62 \| moderate	15.38 \| fine	68.663 \| fine	12.707 \| good	0.704 \| good	6.964 \| good	0.218 \| good
2025-12-07T08:00:00.000Z	62 \| moderate	15.336 \| fine	68.555 \| fine	9.937 \| good	0.673 \| good	6.418 \| good	0.215 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.129 \| fine	68.119 \| fine	7.303 \| good	0.642 \| good	5.872 \| good	0.211 \| good
2025-12-07T10:00:00.000Z	62 \| moderate	15.475 \| fine	68.773 \| fine	5.62 \| good	0.67 \| good	6.577 \| good	0.215 \| good
2025-12-07T11:00:00.000Z	66 \| moderate	17.153 \| fine	75.855 \| fine	2.461 \| good	0.698 \| good	7.283 \| good	0.219 \| good
2025-12-07T12:00:00.000Z	66 \| moderate	16.623 \| fine	73.912 \| fine	2.252 \| good	0.725 \| good	7.989 \| good	0.223 \| good
2025-12-07T13:00:00.000Z	69 \| moderate	18.518 \| fine	82.055 \| fine	5.689 \| good	0.8 \| good	9.236 \| good	0.251 \| good
2025-12-07T14:00:00.000Z	71 \| moderate	19.892 \| fine	87.696 \| fine	8.928 \| good	0.875 \| good	10.483 \| good	0.279 \| good
2025-12-07T15:00:00.000Z	71 \| moderate	20.035 \| fine	87.962 \| fine	19.338 \| good	0.95 \| good	11.729 \| good	0.307 \| good
2025-12-07T16:00:00.000Z	71 \| moderate	20.108 \| fine	88.838 \| fine	20.151 \| good	0.862 \| good	9.785 \| good	0.282 \| good
2025-12-07T17:00:00.000Z	75 \| moderate	22.404 \| fine	98.244 \| fine	17.956 \| good	0.775 \| good	7.84 \| good	0.257 \| good
2025-12-07T18:00:00.000Z	77 \| moderate	23.436 \| fine	102.409 \| fine	18.738 \| good	0.688 \| good	5.896 \| good	0.233 \| good
2025-12-07T19:00:00.000Z	69 \| moderate	18.782 \| fine	82.998 \| fine	22.373 \| good	0.86 \| good	6.578 \| good	0.232 \| good
2025-12-07T20:00:00.000Z	64 \| moderate	15.641 \| fine	69.811 \| fine	20.934 \| good	1.031 \| good	7.259 \| good	0.232 \| good
2025-12-07T21:00:00.000Z	56 \| moderate	11.978 \| good	53.732 \| good	19.699 \| good	1.203 \| good	7.941 \| good	0.232 \| good
2025-12-07T22:00:00.000Z	52 \| moderate	9.566 \| good	42.644 \| good	19.428 \| good	1.092 \| good	7.552 \| good	0.226 \| good
2025-12-07T23:00:00.000Z	49 \| good	9.058 \| good	39.793 \| good	20.787 \| good	0.981 \| good	7.164 \| good	0.22 \| good
2025-12-08T00:00:00.000Z	38 \| good	7.244 \| good	31.994 \| good	18.311 \| good	0.87 \| good	6.775 \| good	0.215 \| good
2025-12-08T01:00:00.000Z	38 \| good	6.923 \| good	30.484 \| good	16.011 \| good	0.802 \| good	5.972 \| good	0.211 \| good
2025-12-08T02:00:00.000Z	44 \| good	8.11 \| good	35.412 \| good	13.298 \| good	0.735 \| good	5.169 \| good	0.207 \| good
2025-12-08T03:00:00.000Z	49 \| good	8.743 \| good	38.31 \| good	14.902 \| good	0.668 \| good	4.366 \| good	0.203 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	9.546 \| good	42.641 \| good	17.572 \| good	0.652 \| good	4.251 \| good	0.202 \| good
2025-12-08T05:00:00.000Z	52 \| moderate	9.743 \| good	43.574 \| good	20.279 \| good	0.635 \| good	4.136 \| good	0.201 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.28 \| good	41.147 \| good	17.591 \| good	0.619 \| good	4.021 \| good	0.199 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.803 \| good	43.462 \| good	16.241 \| good	0.597 \| good	3.944 \| good	0.197 \| good
2025-12-08T08:00:00.000Z	49 \| good	9.201 \| good	40.953 \| good	16.19 \| good	0.574 \| good	3.867 \| good	0.195 \| good
2025-12-08T09:00:00.000Z	52 \| moderate	9.712 \| good	43.175 \| good	15.986 \| good	0.552 \| good	3.791 \| good	0.193 \| good
2025-12-08T10:00:00.000Z	52 \| moderate	9.648 \| good	42.889 \| good	13.603 \| good	0.548 \| good	4.052 \| good	0.194 \| good
2025-12-08T11:00:00.000Z	44 \| good	8.308 \| good	36.423 \| good	15.023 \| good	0.543 \| good	4.313 \| good	0.195 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.528 \| good	37.275 \| good	16.341 \| good	0.539 \| good	4.575 \| good	0.196 \| good
2025-12-08T13:00:00.000Z	44 \| good	7.772 \| good	34.141 \| good	18.369 \| good	0.623 \| good	5.137 \| good	0.205 \| good
2025-12-08T14:00:00.000Z	38 \| good	7.298 \| good	31.946 \| good	19.762 \| good	0.707 \| good	5.699 \| good	0.213 \| good
2025-12-08T15:00:00.000Z	44 \| good	7.924 \| good	34.678 \| good	16.982 \| good	0.792 \| good	6.261 \| good	0.222 \| good
2025-12-08T16:00:00.000Z	44 \| good	8.449 \| good	37.212 \| good	17.741 \| good	1.052 \| good	5.735 \| good	0.214 \| good
2025-12-08T17:00:00.000Z	52 \| moderate	9.595 \| good	42.666 \| good	18.242 \| good	1.312 \| good	5.209 \| good	0.206 \| good
2025-12-08T18:00:00.000Z	52 \| moderate	10.171 \| good	45.172 \| good	19.044 \| good	1.572 \| good	4.683 \| good	0.198 \| good
2025-12-08T19:00:00.000Z	52 \| moderate	9.837 \| good	43.818 \| good	19.333 \| good	1.776 \| good	5.298 \| good	0.199 \| good
2025-12-08T20:00:00.000Z	56 \| moderate	11.641 \| good	51.873 \| good	21.741 \| good	1.98 \| good	5.913 \| good	0.201 \| good
2025-12-08T21:00:00.000Z	56 \| moderate	11.824 \| good	52.793 \| good	21.711 \| good	2.184 \| good	6.527 \| good	0.202 \| good
2025-12-08T22:00:00.000Z	56 \| moderate	11.946 \| good	52.985 \| good	18.106 \| good	2.174 \| good	12.037 \| good	0.244 \| good
2025-12-08T23:00:00.000Z	58 \| moderate	13.477 \| fine	60.405 \| fine	9.453 \| good	2.164 \| good	17.548 \| good	0.285 \| good
2025-12-09T00:00:00.000Z	67 \| moderate	18.434 \| fine	81.513 \| fine	4.247 \| good	2.154 \| good	23.058 \| good	0.327 \| good
2025-12-09T01:00:00.000Z	71 \| moderate	19.947 \| fine	87.665 \| fine	0.9 \| good	2.288 \| good	20.333 \| good	0.308 \| good
2025-12-09T02:00:00.000Z	67 \| moderate	17.958 \| fine	79.387 \| fine	0.763 \| good	2.421 \| good	17.607 \| good	0.288 \| good
2025-12-09T03:00:00.000Z	64 \| moderate	16.148 \| fine	72.456 \| fine	2.168 \| good	2.554 \| good	14.882 \| good	0.269 \| good
2025-12-09T04:00:00.000Z	62 \| moderate	15.071 \| fine	67.02 \| fine	3.716 \| good	2.206 \| good	12.217 \| good	0.25 \| good
2025-12-09T05:00:00.000Z	64 \| moderate	15.705 \| fine	69.792 \| fine	5.57 \| good	1.857 \| good	9.553 \| good	0.231 \| 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

Empower business decisions with accurate air quality data

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

How accurate is Illinois, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

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

What pollutant is most frequently found in Alton, Illinois?

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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?

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

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

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?