What is the current level of PM10 in St. Louis, Missouri?

St. Louis, Missouri currently has a PM10 concentration of 44.479 μg/m3.

What is the current level of sulfur dioxide (SO2) in St. Louis, Missouri?

The current sulfur dioxide (SO2) concentration in St. Louis, Missouri is 0.254 ppb.

What is the current level of ozone (O3) in St. Louis, Missouri?

St. Louis, Missouri currently has an ozone (O3) concentration of 17.339 ppm.

What is the current level of nitrogen dioxide (NO2) in St. Louis, Missouri?

The current level of nitrogen dioxide (NO2) in St. Louis, Missouri is 4.855 ppb.

Current air quality index in St. Louis, Missouri today

Q: What is the PM2.5 concentration in St. Louis, Missouri right now?

St. Louis, Missouri currently has a PM2.5 concentration of 15.424 μg/m3.

Stay updated with real-time air quality in St. Louis, Missouri 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

St. Louis, Missouri

Last updated: ... (Local time)

Common air pollutants in St. Louis, Missouri

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

15.42 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

44.48 μg/m³

155

255

425

605+

Ozone (O₃)

17.34 ppb

201

201+

Sulfur Dioxide (SO₂)

0.25 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.86 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

St. Louis, Missouri

Get Live Pollen Counts

St. Louis, Missouri

Scroll To Air Quality Map

Track live St. Louis, Missouri air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-11T17:00:00.000Z	49 \| good	9.419 \| good	39.707 \| good	18.641 \| good	0.695 \| good	8.988 \| good	0.21 \| good
2025-12-11T18:00:00.000Z	52 \| moderate	9.82 \| good	37.292 \| good	16.186 \| good	0.79 \| good	10.013 \| good	0.299 \| good
2025-12-11T19:00:00.000Z	49 \| good	9.278 \| good	37.193 \| good	16.204 \| good	0.625 \| good	10.213 \| good	0.221 \| good
2025-12-11T20:00:00.000Z	52 \| moderate	9.629 \| good	37.931 \| good	15.6 \| good	0.626 \| good	12.785 \| good	0.221 \| good
2025-12-11T21:00:00.000Z	52 \| moderate	9.746 \| good	35.592 \| good	15.985 \| good	0.716 \| good	14.841 \| good	0.21 \| good
2025-12-11T22:00:00.000Z	60 \| moderate	13.602 \| fine	54.431 \| good	16.603 \| good	0.61 \| good	13.961 \| good	0.299 \| good
2025-12-11T23:00:00.000Z	54 \| moderate	11.042 \| good	38.928 \| good	17.422 \| good	0.881 \| good	13.129 \| good	0.299 \| good
2025-12-12T00:00:00.000Z	54 \| moderate	10.618 \| good	35.402 \| good	16.304 \| good	1.399 \| good	10.335 \| good	0.2 \| good
2025-12-12T01:00:00.000Z	52 \| moderate	10.027 \| good	32.703 \| good	16.887 \| good	1.423 \| good	9.618 \| good	0.211 \| good
2025-12-12T02:00:00.000Z	54 \| moderate	11.158 \| good	30.168 \| good	15.98 \| good	0.733 \| good	9.041 \| good	0.2 \| good
2025-12-12T03:00:00.000Z	56 \| moderate	12.305 \| fine	55.845 \| fine	16.054 \| good	0.937 \| good	6.493 \| good	0.209 \| good
2025-12-12T04:00:00.000Z	52 \| moderate	9.744 \| good	28.048 \| good	15.317 \| good	0.609 \| good	9.788 \| good	0.2 \| good
2025-12-12T05:00:00.000Z	54 \| moderate	10.775 \| good	28.094 \| good	15.504 \| good	0.517 \| good	11.175 \| good	0.2 \| good
2025-12-12T06:00:00.000Z	54 \| moderate	10.806 \| good	27.812 \| good	14.665 \| good	0.514 \| good	8.588 \| good	0.2 \| good
2025-12-12T07:00:00.000Z	54 \| moderate	10.806 \| good	27.812 \| good	14.736 \| good	0.521 \| good	8.638 \| good	0.2 \| good
2025-12-12T08:00:00.000Z	54 \| moderate	10.802 \| good	27.812 \| good	15.359 \| good	0.527 \| good	8.676 \| good	0.199 \| good
2025-12-12T09:00:00.000Z	49 \| good	9.379 \| good	26.687 \| good	17.735 \| good	0.636 \| good	7.63 \| good	0.199 \| good
2025-12-12T10:00:00.000Z	49 \| good	8.638 \| good	25.78 \| good	18.41 \| good	0.883 \| good	7.442 \| good	0.2 \| good
2025-12-12T11:00:00.000Z	52 \| moderate	9.918 \| good	25.151 \| good	18.17 \| good	0.443 \| good	7.937 \| good	0.2 \| good
2025-12-12T12:00:00.000Z	49 \| good	9.499 \| good	24.631 \| good	19.042 \| good	0.507 \| good	9.34 \| good	0.2 \| good
2025-12-12T13:00:00.000Z	52 \| moderate	10.076 \| good	24.898 \| good	18.795 \| good	0.411 \| good	10.346 \| good	0.288 \| good
2025-12-12T14:00:00.000Z	49 \| good	8.91 \| good	23.585 \| good	17.864 \| good	0.603 \| good	11.123 \| good	0.2 \| good
2025-12-12T15:00:00.000Z	52 \| moderate	10.125 \| good	24.751 \| good	15.831 \| good	0.691 \| good	11.28 \| good	0.289 \| good
2025-12-12T16:00:00.000Z	54 \| moderate	10.926 \| good	27.701 \| good	17.223 \| good	0.796 \| good	9.462 \| good	0.201 \| good
2025-12-12T17:00:00.000Z	58 \| moderate	13.193 \| fine	31.946 \| good	16.188 \| good	0.913 \| good	8.368 \| good	0.2 \| good
2025-12-12T18:00:00.000Z	58 \| moderate	12.935 \| fine	37.124 \| good	17.24 \| good	0.844 \| good	8.343 \| good	0.2 \| good
2025-12-12T19:00:00.000Z	58 \| moderate	12.701 \| fine	36.505 \| good	19.095 \| good	0.585 \| good	7.344 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	54 \| moderate	11.266 \| good	38.26 \| good	19.402 \| good	0.687 \| good	8.492 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	54 \| moderate	10.764 \| good	36.241 \| good	21.24 \| good	0.441 \| good	6.255 \| good	0.2 \| good
2025-12-12T22:00:00.000Z	54 \| moderate	10.828 \| good	36.012 \| good	21.534 \| good	0.393 \| good	6.275 \| good	0.288 \| good
2025-12-12T23:00:00.000Z	58 \| moderate	12.615 \| fine	35.099 \| good	18.965 \| good	0.564 \| good	10.086 \| good	0.2 \| good
2025-12-13T00:00:00.000Z	60 \| moderate	13.687 \| fine	35.084 \| good	19.019 \| good	0.454 \| good	7.819 \| good	0.2 \| good
2025-12-13T01:00:00.000Z	58 \| moderate	13.191 \| fine	34.631 \| good	19.206 \| good	0.467 \| good	7.852 \| good	0.211 \| good
2025-12-13T02:00:00.000Z	58 \| moderate	13.366 \| fine	33.923 \| good	20.126 \| good	0.364 \| good	6.596 \| good	0.211 \| good
2025-12-13T03:00:00.000Z	66 \| moderate	17.46 \| fine	77.812 \| fine	6.425 \| good	1.719 \| good	17.269 \| good	0.283 \| good
2025-12-13T04:00:00.000Z	58 \| moderate	13.421 \| fine	34.345 \| good	20.891 \| good	0.364 \| good	6.343 \| good	0.2 \| good
2025-12-13T05:00:00.000Z	56 \| moderate	12.003 \| good	32.862 \| good	22.123 \| good	0.376 \| good	5.163 \| good	0.199 \| good
2025-12-13T06:00:00.000Z	56 \| moderate	11.637 \| good	30.29 \| good	23.032 \| good	0.429 \| good	4.124 \| good	0.199 \| good
2025-12-13T07:00:00.000Z	56 \| moderate	11.637 \| good	30.29 \| good	22.708 \| good	0.426 \| good	4.05 \| good	0.199 \| good
2025-12-13T08:00:00.000Z	54 \| moderate	11.325 \| good	29.042 \| good	23.032 \| good	0.426 \| good	3.946 \| good	0.199 \| good
2025-12-13T09:00:00.000Z	56 \| moderate	12.156 \| fine	29.547 \| good	21.971 \| good	0.424 \| good	4.388 \| good	0.189 \| good
2025-12-13T10:00:00.000Z	56 \| moderate	12.335 \| fine	29.45 \| good	22.035 \| good	0.365 \| good	4.731 \| good	0.199 \| good
2025-12-13T11:00:00.000Z	56 \| moderate	12.429 \| fine	29.085 \| good	22.089 \| good	0.416 \| good	4.366 \| good	0.189 \| good
2025-12-13T12:00:00.000Z	60 \| moderate	14.018 \| fine	36.55 \| good	20.631 \| good	0.378 \| good	5.154 \| good	0.199 \| good
2025-12-13T13:00:00.000Z	62 \| moderate	14.588 \| fine	41.742 \| good	19.47 \| good	0.375 \| good	5.628 \| good	0.199 \| good
2025-12-13T14:00:00.000Z	62 \| moderate	15.114 \| fine	44.515 \| good	18.241 \| good	0.37 \| good	5.642 \| good	0.199 \| good
2025-12-13T15:00:00.000Z	62 \| moderate	15.424 \| fine	44.479 \| good	17.339 \| good	0.254 \| good	4.855 \| good	0.2 \| good
2025-12-13T16:00:00.000Z	60 \| moderate	13.502 \| fine	40.65 \| good	19.386 \| good	0.325 \| good	5.204 \| good	0.2 \| good
2025-12-13T16:00:00.000Z	62 \| moderate	15.424 \| fine	44.479 \| good	17.339 \| good	0.254 \| good	4.855 \| good	0.2 \| good
2025-12-13T17:00:00.000Z	16 \| good	1.836 \| good	7.745 \| good	16.879 \| good	0.731 \| good	3.207 \| good	0.173 \| good
2025-12-13T18:00:00.000Z	16 \| good	2.165 \| good	8.617 \| good	17.15 \| good	0.783 \| good	2.962 \| good	0.166 \| good
2025-12-13T19:00:00.000Z	16 \| good	3.23 \| good	14.151 \| good	16.814 \| good	0.775 \| good	3.054 \| good	0.164 \| good
2025-12-13T20:00:00.000Z	27 \| good	4.515 \| good	19.784 \| good	18.007 \| good	0.766 \| good	3.146 \| good	0.162 \| good
2025-12-13T21:00:00.000Z	27 \| good	5.083 \| good	21.829 \| good	18.292 \| good	0.758 \| good	3.238 \| good	0.16 \| good
2025-12-13T22:00:00.000Z	16 \| good	2.918 \| good	11.916 \| good	16.632 \| good	0.702 \| good	3.283 \| good	0.161 \| good
2025-12-13T23:00:00.000Z	19 \| good	1.838 \| good	7.896 \| good	19.525 \| good	0.647 \| good	3.328 \| good	0.162 \| good
2025-12-14T00:00:00.000Z	18 \| good	1.661 \| good	6.955 \| good	19.331 \| good	0.592 \| good	3.373 \| good	0.163 \| good
2025-12-14T01:00:00.000Z	18 \| good	2.327 \| good	9.896 \| good	18.576 \| good	0.562 \| good	3.254 \| good	0.162 \| good
2025-12-14T02:00:00.000Z	16 \| good	3.277 \| good	14.403 \| good	16.99 \| good	0.532 \| good	3.135 \| good	0.161 \| good
2025-12-14T03:00:00.000Z	17 \| good	3.002 \| good	12.22 \| good	17.791 \| good	0.502 \| good	3.017 \| good	0.16 \| good
2025-12-14T04:00:00.000Z	22 \| good	3.902 \| good	16.955 \| good	19.486 \| good	0.461 \| good	2.806 \| good	0.161 \| good
2025-12-14T05:00:00.000Z	20 \| good	2.735 \| good	11.124 \| good	21.698 \| good	0.42 \| good	2.594 \| good	0.161 \| good
2025-12-14T06:00:00.000Z	21 \| good	2.679 \| good	10.887 \| good	22.515 \| good	0.379 \| good	2.383 \| good	0.162 \| good
2025-12-14T07:00:00.000Z	21 \| good	1.947 \| good	7.922 \| good	23.424 \| good	0.366 \| good	2.226 \| good	0.161 \| good
2025-12-14T08:00:00.000Z	24 \| good	2.214 \| good	9.094 \| good	25.671 \| good	0.352 \| good	2.07 \| good	0.16 \| good
2025-12-14T09:00:00.000Z	23 \| good	1.742 \| good	7.255 \| good	24.573 \| good	0.339 \| good	1.913 \| good	0.16 \| good
2025-12-14T10:00:00.000Z	22 \| good	2.375 \| good	9.78 \| good	24.383 \| good	0.349 \| good	1.922 \| good	0.16 \| good
2025-12-14T11:00:00.000Z	21 \| good	1.536 \| good	6.097 \| good	23.141 \| good	0.359 \| good	1.931 \| good	0.16 \| good
2025-12-14T12:00:00.000Z	21 \| good	2.352 \| good	9.69 \| good	22.736 \| good	0.369 \| good	1.94 \| good	0.16 \| good
2025-12-14T13:00:00.000Z	20 \| good	1.885 \| good	7.811 \| good	22.278 \| good	0.42 \| good	2.146 \| good	0.163 \| good
2025-12-14T14:00:00.000Z	19 \| good	1.872 \| good	7.718 \| good	20.745 \| good	0.472 \| good	2.353 \| good	0.167 \| good
2025-12-14T15:00:00.000Z	19 \| good	1.917 \| good	7.89 \| good	21.436 \| good	0.523 \| good	2.559 \| good	0.17 \| good
2025-12-14T16:00:00.000Z	19 \| good	1.887 \| good	7.779 \| good	19.575 \| good	0.585 \| good	2.448 \| good	0.168 \| good
2025-12-14T17:00:00.000Z	22 \| good	3.564 \| good	15.834 \| good	19.017 \| good	0.647 \| good	2.338 \| good	0.166 \| good
2025-12-14T18:00:00.000Z	27 \| good	4.915 \| good	21.1 \| good	20.235 \| good	0.709 \| good	2.228 \| good	0.165 \| good
2025-12-14T19:00:00.000Z	38 \| good	6.536 \| good	29.101 \| good	23.225 \| good	0.784 \| good	2.52 \| good	0.165 \| good
2025-12-14T20:00:00.000Z	38 \| good	6.624 \| good	29.615 \| good	23.184 \| good	0.859 \| good	2.811 \| good	0.164 \| good
2025-12-14T21:00:00.000Z	44 \| good	8.139 \| good	35.68 \| good	18.89 \| good	0.933 \| good	3.103 \| good	0.164 \| good
2025-12-14T22:00:00.000Z	38 \| good	6.525 \| good	29.134 \| good	17.606 \| good	0.993 \| good	4.443 \| good	0.173 \| good
2025-12-14T23:00:00.000Z	33 \| good	5.864 \| good	25.609 \| good	15.651 \| good	1.053 \| good	5.782 \| good	0.182 \| good
2025-12-15T00:00:00.000Z	33 \| good	6.383 \| good	28.27 \| good	14.774 \| good	1.114 \| good	7.122 \| good	0.191 \| good
2025-12-15T01:00:00.000Z	49 \| good	9.195 \| good	41.05 \| good	14.974 \| good	1.148 \| good	7.66 \| good	0.196 \| good
2025-12-15T02:00:00.000Z	44 \| good	8.252 \| good	36.041 \| good	11.93 \| good	1.182 \| good	8.198 \| good	0.201 \| good
2025-12-15T03:00:00.000Z	49 \| good	8.671 \| good	38.226 \| good	10.364 \| good	1.217 \| good	8.737 \| good	0.207 \| good
2025-12-15T04:00:00.000Z	44 \| good	7.632 \| good	33.32 \| good	11.297 \| good	1.195 \| good	8.723 \| good	0.208 \| good
2025-12-15T05:00:00.000Z	38 \| good	7.375 \| good	32.723 \| good	9.819 \| good	1.174 \| good	8.709 \| good	0.21 \| good
2025-12-15T06:00:00.000Z	38 \| good	7.244 \| good	31.967 \| good	9.349 \| good	1.152 \| good	8.695 \| good	0.211 \| good
2025-12-15T07:00:00.000Z	33 \| good	6.308 \| good	28.184 \| good	9.09 \| good	1.127 \| good	7.673 \| good	0.203 \| good
2025-12-15T08:00:00.000Z	33 \| good	5.745 \| good	24.799 \| good	9.874 \| good	1.102 \| good	6.651 \| good	0.195 \| good
2025-12-15T09:00:00.000Z	27 \| good	4.796 \| good	20.759 \| good	8.793 \| good	1.077 \| good	5.629 \| good	0.187 \| good
2025-12-15T10:00:00.000Z	27 \| good	5.105 \| good	21.742 \| good	8.768 \| good	1.089 \| good	4.899 \| good	0.181 \| good
2025-12-15T11:00:00.000Z	27 \| good	5.059 \| good	22.085 \| good	10.424 \| good	1.102 \| good	4.169 \| good	0.174 \| good
2025-12-15T12:00:00.000Z	27 \| good	4.925 \| good	21.191 \| good	10.881 \| good	1.114 \| good	3.439 \| good	0.167 \| good
2025-12-15T13:00:00.000Z	33 \| good	6.263 \| good	27.577 \| good	10.144 \| good	1.119 \| good	3.767 \| good	0.172 \| good
2025-12-15T14:00:00.000Z	33 \| good	6.35 \| good	28.301 \| good	13.083 \| good	1.124 \| good	4.094 \| good	0.178 \| good
2025-12-15T15:00:00.000Z	38 \| good	6.503 \| good	29.1 \| good	16.636 \| good	1.129 \| good	4.421 \| good	0.183 \| good
2025-12-15T16:00:00.000Z	33 \| good	5.989 \| good	26.406 \| good	20.9 \| good	1.125 \| good	3.912 \| good	0.178 \| good

St. Louis

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near St. Louis, Missouri

0.20ppm

How accurate is Missouri, USA air quality data?

The air quality data for Missouri, 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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Check live rankings of places in the USA affected by air pollution.

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Frequently asked questions

How frequently does the air quality data for St. Louis, Missouri get updated?

Air quality updates for St. Louis, Missouri are available every hour.

What time in the past 24 hours saw the poorest air quality in St. Louis, Missouri?

St. Louis, Missouri experienced its worst air quality at 03:00:00, 2025-12-13.

When was air quality in St. Louis, Missouri the best over the past 24 hours?

The best air quality in St. Louis, Missouri was observed at 08:00:00 on 2025-12-13.

What is the air quality in St. Louis, Missouri right now?

The air quality in St. Louis, Missouri right now is Moderate, with an AQI of 62.

What pollutant is most frequently found in St. Louis, Missouri?

In St. Louis, Missouri, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in St. Louis, Missouri is poor?

When air quality in St. Louis, Missouri is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in St. Louis, Missouri right now?

St. Louis, Missouri currently has a PM_2.5 concentration of 15.424 μg/m³.

What is the current level of PM₁₀ in St. Louis, Missouri?

St. Louis, Missouri currently has a PM₁₀ concentration of 44.479 μg/m³.

What is the current level of carbon monoxide (CO) in St. Louis, Missouri?

The current carbon monoxide (CO) level in St. Louis, Missouri is 0.2 ppm.

What is the current level of sulfur dioxide (SO₂) in St. Louis, Missouri?

The current sulfur dioxide (SO₂) concentration in St. Louis, Missouri is 0.254 ppb.

What is the current level of ozone (O₃) in St. Louis, Missouri?

St. Louis, Missouri currently has an ozone (O₃) concentration of 17.339 ppm.

What is the current level of nitrogen dioxide (NO₂) in St. Louis, Missouri?

The current level of nitrogen dioxide (NO₂) in St. Louis, Missouri is 4.855 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-11T17:00:00.000Z	49 \| good	9.419 \| good	39.707 \| good	18.641 \| good	0.695 \| good	8.988 \| good	0.21 \| good
2025-12-11T18:00:00.000Z	52 \| moderate	9.82 \| good	37.292 \| good	16.186 \| good	0.79 \| good	10.013 \| good	0.299 \| good
2025-12-11T19:00:00.000Z	49 \| good	9.278 \| good	37.193 \| good	16.204 \| good	0.625 \| good	10.213 \| good	0.221 \| good
2025-12-11T20:00:00.000Z	52 \| moderate	9.629 \| good	37.931 \| good	15.6 \| good	0.626 \| good	12.785 \| good	0.221 \| good
2025-12-11T21:00:00.000Z	52 \| moderate	9.746 \| good	35.592 \| good	15.985 \| good	0.716 \| good	14.841 \| good	0.21 \| good
2025-12-11T22:00:00.000Z	60 \| moderate	13.602 \| fine	54.431 \| good	16.603 \| good	0.61 \| good	13.961 \| good	0.299 \| good
2025-12-11T23:00:00.000Z	54 \| moderate	11.042 \| good	38.928 \| good	17.422 \| good	0.881 \| good	13.129 \| good	0.299 \| good
2025-12-12T00:00:00.000Z	54 \| moderate	10.618 \| good	35.402 \| good	16.304 \| good	1.399 \| good	10.335 \| good	0.2 \| good
2025-12-12T01:00:00.000Z	52 \| moderate	10.027 \| good	32.703 \| good	16.887 \| good	1.423 \| good	9.618 \| good	0.211 \| good
2025-12-12T02:00:00.000Z	54 \| moderate	11.158 \| good	30.168 \| good	15.98 \| good	0.733 \| good	9.041 \| good	0.2 \| good
2025-12-12T03:00:00.000Z	56 \| moderate	12.305 \| fine	55.845 \| fine	16.054 \| good	0.937 \| good	6.493 \| good	0.209 \| good
2025-12-12T04:00:00.000Z	52 \| moderate	9.744 \| good	28.048 \| good	15.317 \| good	0.609 \| good	9.788 \| good	0.2 \| good
2025-12-12T05:00:00.000Z	54 \| moderate	10.775 \| good	28.094 \| good	15.504 \| good	0.517 \| good	11.175 \| good	0.2 \| good
2025-12-12T06:00:00.000Z	54 \| moderate	10.806 \| good	27.812 \| good	14.665 \| good	0.514 \| good	8.588 \| good	0.2 \| good
2025-12-12T07:00:00.000Z	54 \| moderate	10.806 \| good	27.812 \| good	14.736 \| good	0.521 \| good	8.638 \| good	0.2 \| good
2025-12-12T08:00:00.000Z	54 \| moderate	10.802 \| good	27.812 \| good	15.359 \| good	0.527 \| good	8.676 \| good	0.199 \| good
2025-12-12T09:00:00.000Z	49 \| good	9.379 \| good	26.687 \| good	17.735 \| good	0.636 \| good	7.63 \| good	0.199 \| good
2025-12-12T10:00:00.000Z	49 \| good	8.638 \| good	25.78 \| good	18.41 \| good	0.883 \| good	7.442 \| good	0.2 \| good
2025-12-12T11:00:00.000Z	52 \| moderate	9.918 \| good	25.151 \| good	18.17 \| good	0.443 \| good	7.937 \| good	0.2 \| good
2025-12-12T12:00:00.000Z	49 \| good	9.499 \| good	24.631 \| good	19.042 \| good	0.507 \| good	9.34 \| good	0.2 \| good
2025-12-12T13:00:00.000Z	52 \| moderate	10.076 \| good	24.898 \| good	18.795 \| good	0.411 \| good	10.346 \| good	0.288 \| good
2025-12-12T14:00:00.000Z	49 \| good	8.91 \| good	23.585 \| good	17.864 \| good	0.603 \| good	11.123 \| good	0.2 \| good
2025-12-12T15:00:00.000Z	52 \| moderate	10.125 \| good	24.751 \| good	15.831 \| good	0.691 \| good	11.28 \| good	0.289 \| good
2025-12-12T16:00:00.000Z	54 \| moderate	10.926 \| good	27.701 \| good	17.223 \| good	0.796 \| good	9.462 \| good	0.201 \| good
2025-12-12T17:00:00.000Z	58 \| moderate	13.193 \| fine	31.946 \| good	16.188 \| good	0.913 \| good	8.368 \| good	0.2 \| good
2025-12-12T18:00:00.000Z	58 \| moderate	12.935 \| fine	37.124 \| good	17.24 \| good	0.844 \| good	8.343 \| good	0.2 \| good
2025-12-12T19:00:00.000Z	58 \| moderate	12.701 \| fine	36.505 \| good	19.095 \| good	0.585 \| good	7.344 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	54 \| moderate	11.266 \| good	38.26 \| good	19.402 \| good	0.687 \| good	8.492 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	54 \| moderate	10.764 \| good	36.241 \| good	21.24 \| good	0.441 \| good	6.255 \| good	0.2 \| good
2025-12-12T22:00:00.000Z	54 \| moderate	10.828 \| good	36.012 \| good	21.534 \| good	0.393 \| good	6.275 \| good	0.288 \| good
2025-12-12T23:00:00.000Z	58 \| moderate	12.615 \| fine	35.099 \| good	18.965 \| good	0.564 \| good	10.086 \| good	0.2 \| good
2025-12-13T00:00:00.000Z	60 \| moderate	13.687 \| fine	35.084 \| good	19.019 \| good	0.454 \| good	7.819 \| good	0.2 \| good
2025-12-13T01:00:00.000Z	58 \| moderate	13.191 \| fine	34.631 \| good	19.206 \| good	0.467 \| good	7.852 \| good	0.211 \| good
2025-12-13T02:00:00.000Z	58 \| moderate	13.366 \| fine	33.923 \| good	20.126 \| good	0.364 \| good	6.596 \| good	0.211 \| good
2025-12-13T03:00:00.000Z	66 \| moderate	17.46 \| fine	77.812 \| fine	6.425 \| good	1.719 \| good	17.269 \| good	0.283 \| good
2025-12-13T04:00:00.000Z	58 \| moderate	13.421 \| fine	34.345 \| good	20.891 \| good	0.364 \| good	6.343 \| good	0.2 \| good
2025-12-13T05:00:00.000Z	56 \| moderate	12.003 \| good	32.862 \| good	22.123 \| good	0.376 \| good	5.163 \| good	0.199 \| good
2025-12-13T06:00:00.000Z	56 \| moderate	11.637 \| good	30.29 \| good	23.032 \| good	0.429 \| good	4.124 \| good	0.199 \| good
2025-12-13T07:00:00.000Z	56 \| moderate	11.637 \| good	30.29 \| good	22.708 \| good	0.426 \| good	4.05 \| good	0.199 \| good
2025-12-13T08:00:00.000Z	54 \| moderate	11.325 \| good	29.042 \| good	23.032 \| good	0.426 \| good	3.946 \| good	0.199 \| good
2025-12-13T09:00:00.000Z	56 \| moderate	12.156 \| fine	29.547 \| good	21.971 \| good	0.424 \| good	4.388 \| good	0.189 \| good
2025-12-13T10:00:00.000Z	56 \| moderate	12.335 \| fine	29.45 \| good	22.035 \| good	0.365 \| good	4.731 \| good	0.199 \| good
2025-12-13T11:00:00.000Z	56 \| moderate	12.429 \| fine	29.085 \| good	22.089 \| good	0.416 \| good	4.366 \| good	0.189 \| good
2025-12-13T12:00:00.000Z	60 \| moderate	14.018 \| fine	36.55 \| good	20.631 \| good	0.378 \| good	5.154 \| good	0.199 \| good
2025-12-13T13:00:00.000Z	62 \| moderate	14.588 \| fine	41.742 \| good	19.47 \| good	0.375 \| good	5.628 \| good	0.199 \| good
2025-12-13T14:00:00.000Z	62 \| moderate	15.114 \| fine	44.515 \| good	18.241 \| good	0.37 \| good	5.642 \| good	0.199 \| good
2025-12-13T15:00:00.000Z	62 \| moderate	15.424 \| fine	44.479 \| good	17.339 \| good	0.254 \| good	4.855 \| good	0.2 \| good
2025-12-13T16:00:00.000Z	60 \| moderate	13.502 \| fine	40.65 \| good	19.386 \| good	0.325 \| good	5.204 \| good	0.2 \| good
2025-12-13T16:00:00.000Z	62 \| moderate	15.424 \| fine	44.479 \| good	17.339 \| good	0.254 \| good	4.855 \| good	0.2 \| good
2025-12-13T17:00:00.000Z	16 \| good	1.836 \| good	7.745 \| good	16.879 \| good	0.731 \| good	3.207 \| good	0.173 \| good
2025-12-13T18:00:00.000Z	16 \| good	2.165 \| good	8.617 \| good	17.15 \| good	0.783 \| good	2.962 \| good	0.166 \| good
2025-12-13T19:00:00.000Z	16 \| good	3.23 \| good	14.151 \| good	16.814 \| good	0.775 \| good	3.054 \| good	0.164 \| good
2025-12-13T20:00:00.000Z	27 \| good	4.515 \| good	19.784 \| good	18.007 \| good	0.766 \| good	3.146 \| good	0.162 \| good
2025-12-13T21:00:00.000Z	27 \| good	5.083 \| good	21.829 \| good	18.292 \| good	0.758 \| good	3.238 \| good	0.16 \| good
2025-12-13T22:00:00.000Z	16 \| good	2.918 \| good	11.916 \| good	16.632 \| good	0.702 \| good	3.283 \| good	0.161 \| good
2025-12-13T23:00:00.000Z	19 \| good	1.838 \| good	7.896 \| good	19.525 \| good	0.647 \| good	3.328 \| good	0.162 \| good
2025-12-14T00:00:00.000Z	18 \| good	1.661 \| good	6.955 \| good	19.331 \| good	0.592 \| good	3.373 \| good	0.163 \| good
2025-12-14T01:00:00.000Z	18 \| good	2.327 \| good	9.896 \| good	18.576 \| good	0.562 \| good	3.254 \| good	0.162 \| good
2025-12-14T02:00:00.000Z	16 \| good	3.277 \| good	14.403 \| good	16.99 \| good	0.532 \| good	3.135 \| good	0.161 \| good
2025-12-14T03:00:00.000Z	17 \| good	3.002 \| good	12.22 \| good	17.791 \| good	0.502 \| good	3.017 \| good	0.16 \| good
2025-12-14T04:00:00.000Z	22 \| good	3.902 \| good	16.955 \| good	19.486 \| good	0.461 \| good	2.806 \| good	0.161 \| good
2025-12-14T05:00:00.000Z	20 \| good	2.735 \| good	11.124 \| good	21.698 \| good	0.42 \| good	2.594 \| good	0.161 \| good
2025-12-14T06:00:00.000Z	21 \| good	2.679 \| good	10.887 \| good	22.515 \| good	0.379 \| good	2.383 \| good	0.162 \| good
2025-12-14T07:00:00.000Z	21 \| good	1.947 \| good	7.922 \| good	23.424 \| good	0.366 \| good	2.226 \| good	0.161 \| good
2025-12-14T08:00:00.000Z	24 \| good	2.214 \| good	9.094 \| good	25.671 \| good	0.352 \| good	2.07 \| good	0.16 \| good
2025-12-14T09:00:00.000Z	23 \| good	1.742 \| good	7.255 \| good	24.573 \| good	0.339 \| good	1.913 \| good	0.16 \| good
2025-12-14T10:00:00.000Z	22 \| good	2.375 \| good	9.78 \| good	24.383 \| good	0.349 \| good	1.922 \| good	0.16 \| good
2025-12-14T11:00:00.000Z	21 \| good	1.536 \| good	6.097 \| good	23.141 \| good	0.359 \| good	1.931 \| good	0.16 \| good
2025-12-14T12:00:00.000Z	21 \| good	2.352 \| good	9.69 \| good	22.736 \| good	0.369 \| good	1.94 \| good	0.16 \| good
2025-12-14T13:00:00.000Z	20 \| good	1.885 \| good	7.811 \| good	22.278 \| good	0.42 \| good	2.146 \| good	0.163 \| good
2025-12-14T14:00:00.000Z	19 \| good	1.872 \| good	7.718 \| good	20.745 \| good	0.472 \| good	2.353 \| good	0.167 \| good
2025-12-14T15:00:00.000Z	19 \| good	1.917 \| good	7.89 \| good	21.436 \| good	0.523 \| good	2.559 \| good	0.17 \| good
2025-12-14T16:00:00.000Z	19 \| good	1.887 \| good	7.779 \| good	19.575 \| good	0.585 \| good	2.448 \| good	0.168 \| good
2025-12-14T17:00:00.000Z	22 \| good	3.564 \| good	15.834 \| good	19.017 \| good	0.647 \| good	2.338 \| good	0.166 \| good
2025-12-14T18:00:00.000Z	27 \| good	4.915 \| good	21.1 \| good	20.235 \| good	0.709 \| good	2.228 \| good	0.165 \| good
2025-12-14T19:00:00.000Z	38 \| good	6.536 \| good	29.101 \| good	23.225 \| good	0.784 \| good	2.52 \| good	0.165 \| good
2025-12-14T20:00:00.000Z	38 \| good	6.624 \| good	29.615 \| good	23.184 \| good	0.859 \| good	2.811 \| good	0.164 \| good
2025-12-14T21:00:00.000Z	44 \| good	8.139 \| good	35.68 \| good	18.89 \| good	0.933 \| good	3.103 \| good	0.164 \| good
2025-12-14T22:00:00.000Z	38 \| good	6.525 \| good	29.134 \| good	17.606 \| good	0.993 \| good	4.443 \| good	0.173 \| good
2025-12-14T23:00:00.000Z	33 \| good	5.864 \| good	25.609 \| good	15.651 \| good	1.053 \| good	5.782 \| good	0.182 \| good
2025-12-15T00:00:00.000Z	33 \| good	6.383 \| good	28.27 \| good	14.774 \| good	1.114 \| good	7.122 \| good	0.191 \| good
2025-12-15T01:00:00.000Z	49 \| good	9.195 \| good	41.05 \| good	14.974 \| good	1.148 \| good	7.66 \| good	0.196 \| good
2025-12-15T02:00:00.000Z	44 \| good	8.252 \| good	36.041 \| good	11.93 \| good	1.182 \| good	8.198 \| good	0.201 \| good
2025-12-15T03:00:00.000Z	49 \| good	8.671 \| good	38.226 \| good	10.364 \| good	1.217 \| good	8.737 \| good	0.207 \| good
2025-12-15T04:00:00.000Z	44 \| good	7.632 \| good	33.32 \| good	11.297 \| good	1.195 \| good	8.723 \| good	0.208 \| good
2025-12-15T05:00:00.000Z	38 \| good	7.375 \| good	32.723 \| good	9.819 \| good	1.174 \| good	8.709 \| good	0.21 \| good
2025-12-15T06:00:00.000Z	38 \| good	7.244 \| good	31.967 \| good	9.349 \| good	1.152 \| good	8.695 \| good	0.211 \| good
2025-12-15T07:00:00.000Z	33 \| good	6.308 \| good	28.184 \| good	9.09 \| good	1.127 \| good	7.673 \| good	0.203 \| good
2025-12-15T08:00:00.000Z	33 \| good	5.745 \| good	24.799 \| good	9.874 \| good	1.102 \| good	6.651 \| good	0.195 \| good
2025-12-15T09:00:00.000Z	27 \| good	4.796 \| good	20.759 \| good	8.793 \| good	1.077 \| good	5.629 \| good	0.187 \| good
2025-12-15T10:00:00.000Z	27 \| good	5.105 \| good	21.742 \| good	8.768 \| good	1.089 \| good	4.899 \| good	0.181 \| good
2025-12-15T11:00:00.000Z	27 \| good	5.059 \| good	22.085 \| good	10.424 \| good	1.102 \| good	4.169 \| good	0.174 \| good
2025-12-15T12:00:00.000Z	27 \| good	4.925 \| good	21.191 \| good	10.881 \| good	1.114 \| good	3.439 \| good	0.167 \| good
2025-12-15T13:00:00.000Z	33 \| good	6.263 \| good	27.577 \| good	10.144 \| good	1.119 \| good	3.767 \| good	0.172 \| good
2025-12-15T14:00:00.000Z	33 \| good	6.35 \| good	28.301 \| good	13.083 \| good	1.124 \| good	4.094 \| good	0.178 \| good
2025-12-15T15:00:00.000Z	38 \| good	6.503 \| good	29.1 \| good	16.636 \| good	1.129 \| good	4.421 \| good	0.183 \| good
2025-12-15T16:00:00.000Z	33 \| good	5.989 \| good	26.406 \| good	20.9 \| good	1.125 \| good	3.912 \| good	0.178 \| good

Current air quality index in St. Louis, Missouri today

Common air pollutants in St. Louis, Missouri

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live St. Louis, Missouri air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near St. Louis, Missouri

Air quality in nearby cities

East St. Louis, Illinois

Cahokia Heights, Illinois

Granite City, Illinois

Clayton, Missouri

Jennings, Missouri

University City, Missouri

How accurate is Missouri, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently does the air quality data for St. Louis, Missouri get updated?

What time in the past 24 hours saw the poorest air quality in St. Louis, Missouri?

When was air quality in St. Louis, Missouri the best over the past 24 hours?

What is the air quality in St. Louis, Missouri right now?

What pollutant is most frequently found in St. Louis, Missouri?

What can I do if the air quality in St. Louis, Missouri is poor?

What is the PM2.5 concentration in St. Louis, Missouri right now?

What is the current level of PM10 in St. Louis, Missouri?

What is the current level of carbon monoxide (CO) in St. Louis, Missouri?

What is the current level of sulfur dioxide (SO2) in St. Louis, Missouri?

What is the current level of ozone (O3) in St. Louis, Missouri?

What is the current level of nitrogen dioxide (NO2) in St. Louis, Missouri?

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 St. Louis, Missouri right now?

What is the current level of PM₁₀ in St. Louis, Missouri?

What is the current level of sulfur dioxide (SO₂) in St. Louis, Missouri?

What is the current level of ozone (O₃) in St. Louis, Missouri?

What is the current level of nitrogen dioxide (NO₂) in St. Louis, Missouri?