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

St. Louis, Missouri currently has a PM10 concentration of 178.517 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 1.334 ppb.

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

St. Louis, Missouri currently has an ozone (O3) concentration of 6.052 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 32.113 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 18.885 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)

5.32 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

57.91 μg/m³

155

255

425

605+

Ozone (O₃)

29.45 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.94 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.12 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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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
2026-02-10T20:00:00.000Z	60 \| moderate	14.221 \| fine	58.417 \| fine	44.012 \| good	0.498 \| good	4.395 \| good	0.299 \| good
2026-02-10T21:00:00.000Z	60 \| moderate	13.752 \| fine	69.253 \| fine	40.318 \| good	0.351 \| good	6.574 \| good	0.2 \| good
2026-02-10T22:00:00.000Z	56 \| moderate	11.701 \| good	65.442 \| fine	41.563 \| good	0.245 \| good	6.371 \| good	0.2 \| good
2026-02-10T23:00:00.000Z	52 \| moderate	10.06 \| good	52.021 \| good	36.937 \| good	0.138 \| good	6.184 \| good	0.2 \| good
2026-02-11T00:00:00.000Z	44 \| good	8.152 \| good	41.583 \| good	31.386 \| good	0.232 \| good	9.442 \| good	0.2 \| good
2026-02-11T01:00:00.000Z	38 \| good	7.151 \| good	33.979 \| good	30.646 \| good	0.229 \| good	9.79 \| good	0.201 \| good
2026-02-11T02:00:00.000Z	38 \| good	6.664 \| good	29.941 \| good	27.5 \| good	0.506 \| good	12.073 \| good	0.2 \| good
2026-02-11T03:00:00.000Z	33 \| good	6.225 \| good	29.281 \| good	26.597 \| good	0.22 \| good	8.678 \| good	0.111 \| good
2026-02-11T04:00:00.000Z	33 \| good	6.294 \| good	28.406 \| good	21.283 \| good	0.779 \| good	13.783 \| good	0.111 \| good
2026-02-11T05:00:00.000Z	33 \| good	6.217 \| good	28.133 \| good	21.06 \| good	0.776 \| good	13.67 \| good	0.111 \| good
2026-02-11T06:00:00.000Z	27 \| good	5.448 \| good	24.51 \| good	21.046 \| good	0.119 \| good	7.616 \| good	0.112 \| good
2026-02-11T07:00:00.000Z	27 \| good	5.448 \| good	24.51 \| good	20.966 \| good	0.12 \| good	7.631 \| good	0.111 \| good
2026-02-11T08:00:00.000Z	27 \| good	5.37 \| good	24.237 \| good	20.916 \| good	0.118 \| good	7.653 \| good	0.111 \| good
2026-02-11T09:00:00.000Z	22 \| good	4.021 \| good	19.594 \| good	19.933 \| good	0.381 \| good	5.542 \| good	0.111 \| good
2026-02-11T10:00:00.000Z	22 \| good	4.417 \| good	18.271 \| good	19.8 \| good	0.111 \| good	7.072 \| good	0.111 \| good
2026-02-11T11:00:00.000Z	27 \| good	4.644 \| good	18.354 \| good	18.001 \| good	0.116 \| good	7.9 \| good	0.111 \| good
2026-02-11T12:00:00.000Z	27 \| good	5.352 \| good	17.94 \| good	17.822 \| good	0.214 \| good	9.751 \| good	0.199 \| good
2026-02-11T13:00:00.000Z	27 \| good	5.206 \| good	20.16 \| good	13.919 \| good	0.601 \| good	13.573 \| good	0.2 \| good
2026-02-11T14:00:00.000Z	33 \| good	5.744 \| good	23.305 \| good	14.563 \| good	2.048 \| good	13.304 \| good	0.233 \| good
2026-02-11T15:00:00.000Z	38 \| good	7.051 \| good	28.97 \| good	16.863 \| good	2.648 \| good	12.55 \| good	0.288 \| good
2026-02-11T16:00:00.000Z	38 \| good	6.801 \| good	31.216 \| good	16.425 \| good	2.282 \| good	12.265 \| good	0.2 \| good
2026-02-11T17:00:00.000Z	33 \| good	6.048 \| good	35.132 \| good	15.75 \| good	2.742 \| good	5.682 \| good	0.199 \| good
2026-02-11T18:00:00.000Z	33 \| good	6.114 \| good	36.013 \| good	20.483 \| good	3.278 \| good	5.991 \| good	0.199 \| good
2026-02-11T19:00:00.000Z	33 \| good	5.533 \| good	30.682 \| good	26.18 \| good	0.58 \| good	4.785 \| good	0.111 \| good
2026-02-11T20:00:00.000Z	28 \| good	4.807 \| good	29.569 \| good	27.801 \| good	0.205 \| good	4.691 \| good	0.111 \| good
2026-02-11T21:00:00.000Z	31 \| good	4.707 \| good	32.62 \| good	27.828 \| good	0.125 \| good	5.688 \| good	0.111 \| good
2026-02-11T22:00:00.000Z	26 \| good	3.977 \| good	25.215 \| good	27.811 \| good	0.122 \| good	3.337 \| good	0.111 \| good
2026-02-11T23:00:00.000Z	28 \| good	3.385 \| good	20.636 \| good	30.12 \| good	0.228 \| good	4.39 \| good	0.199 \| good
2026-02-12T00:00:00.000Z	22 \| good	3.344 \| good	22.282 \| good	24.389 \| good	0.24 \| good	5.112 \| good	0.2 \| good
2026-02-12T01:00:00.000Z	33 \| good	6.04 \| good	28.091 \| good	21.338 \| good	0.239 \| good	6.458 \| good	0.289 \| good
2026-02-12T02:00:00.000Z	49 \| good	8.631 \| good	39.446 \| good	16.693 \| good	0.347 \| good	15.477 \| good	0.654 \| good
2026-02-12T03:00:00.000Z	54 \| moderate	11.489 \| good	49.537 \| good	11.952 \| good	0.432 \| good	23.453 \| good	0.774 \| good
2026-02-12T04:00:00.000Z	57 \| moderate	10.846 \| good	67.67 \| fine	8.671 \| good	0.421 \| good	29.748 \| good	0.883 \| good
2026-02-12T05:00:00.000Z	70 \| moderate	11.646 \| good	94.076 \| fine	2.846 \| good	0.41 \| good	28.746 \| good	0.915 \| good
2026-02-12T06:00:00.000Z	68 \| moderate	13.742 \| fine	89.183 \| fine	3.255 \| good	0.4 \| good	26.406 \| good	0.837 \| good
2026-02-12T07:00:00.000Z	68 \| moderate	13.742 \| fine	89.183 \| fine	3.366 \| good	0.4 \| good	25.69 \| good	0.837 \| good
2026-02-12T08:00:00.000Z	67 \| moderate	13.57 \| fine	88.403 \| fine	4.156 \| good	0.401 \| good	26.542 \| good	0.838 \| good
2026-02-12T09:00:00.000Z	91 \| moderate	20.409 \| fine	135.076 \| fine	5.736 \| good	0.892 \| good	29.128 \| good	1.072 \| good
2026-02-12T10:00:00.000Z	107 \| sensitive	20.247 \| fine	167.039 \| moderate	5.512 \| good	1.231 \| good	32.555 \| good	0.796 \| good
2026-02-12T11:00:00.000Z	117 \| sensitive	21.032 \| fine	187.134 \| moderate	3.8 \| good	1.16 \| good	31.535 \| good	0.531 \| good
2026-02-12T12:00:00.000Z	132 \| sensitive	19.584 \| fine	217.892 \| moderate	4.785 \| good	1.23 \| good	30.915 \| good	0.52 \| good
2026-02-12T13:00:00.000Z	113 \| sensitive	18.885 \| fine	178.517 \| moderate	6.052 \| good	1.334 \| good	32.113 \| good	0.609 \| good
2026-02-12T14:00:00.000Z	105 \| sensitive	19.3 \| fine	162.671 \| moderate	6.329 \| good	2.327 \| good	35.574 \| good	0.61 \| good
2026-02-12T15:00:00.000Z	107 \| sensitive	15.717 \| fine	168.214 \| moderate	4.614 \| good	2.421 \| good	32.825 \| good	0.599 \| good
2026-02-12T16:00:00.000Z	81 \| moderate	14.196 \| fine	115.501 \| fine	16.135 \| good	0.812 \| good	16.183 \| good	0.223 \| good
2026-02-12T17:00:00.000Z	63 \| moderate	8.373 \| good	79.446 \| fine	22.742 \| good	0.659 \| good	10 \| good	0.213 \| good
2026-02-12T18:00:00.000Z	52 \| moderate	5.322 \| good	57.909 \| fine	29.445 \| good	0.363 \| good	3.938 \| good	0.124 \| good
2026-02-12T19:00:00.000Z	52 \| moderate	5.322 \| good	57.909 \| fine	29.445 \| good	0.363 \| good	3.938 \| good	0.124 \| good
2026-02-12T14:00:00.000Z	49 \| good	8.649 \| good	37.627 \| good	8.467 \| good	1.92 \| good	16.766 \| good	0.38 \| good
2026-02-12T15:00:00.000Z	44 \| good	7.852 \| good	34.284 \| good	16.277 \| good	1.783 \| good	12.832 \| good	0.356 \| good
2026-02-12T16:00:00.000Z	38 \| good	6.529 \| good	29.138 \| good	20.925 \| good	2.323 \| good	9.724 \| good	0.307 \| good
2026-02-12T17:00:00.000Z	27 \| good	5.026 \| good	21.805 \| good	24.145 \| good	2.863 \| good	6.616 \| good	0.258 \| good
2026-02-12T18:00:00.000Z	44 \| good	8.13 \| good	35.784 \| good	26.167 \| good	3.403 \| good	3.508 \| good	0.209 \| good
2026-02-12T19:00:00.000Z	44 \| good	7.87 \| good	34.23 \| good	29.774 \| good	3.403 \| good	3.198 \| good	0.201 \| good
2026-02-12T20:00:00.000Z	49 \| good	8.527 \| good	37.201 \| good	31.022 \| good	3.404 \| good	2.887 \| good	0.194 \| good
2026-02-12T21:00:00.000Z	52 \| moderate	9.509 \| good	42.815 \| good	32.33 \| good	3.405 \| good	2.576 \| good	0.187 \| good
2026-02-12T22:00:00.000Z	49 \| good	9.364 \| good	41.748 \| good	29.808 \| good	3.21 \| good	4.61 \| good	0.203 \| good
2026-02-12T23:00:00.000Z	44 \| good	8.026 \| good	35.147 \| good	23.768 \| good	3.015 \| good	6.643 \| good	0.219 \| good
2026-02-13T00:00:00.000Z	49 \| good	8.655 \| good	38.068 \| good	14.613 \| good	2.821 \| good	8.677 \| good	0.235 \| good
2026-02-13T01:00:00.000Z	44 \| good	8.206 \| good	36.165 \| good	12.444 \| good	2.638 \| good	8.468 \| good	0.235 \| good
2026-02-13T02:00:00.000Z	54 \| moderate	11.277 \| good	49.944 \| good	11.807 \| good	2.455 \| good	8.26 \| good	0.235 \| good
2026-02-13T03:00:00.000Z	54 \| moderate	10.634 \| good	46.952 \| good	10.624 \| good	2.272 \| good	8.051 \| good	0.235 \| good
2026-02-13T04:00:00.000Z	52 \| moderate	10.039 \| good	44.567 \| good	9.778 \| good	2.176 \| good	7.658 \| good	0.233 \| good
2026-02-13T05:00:00.000Z	52 \| moderate	9.698 \| good	43.219 \| good	11.89 \| good	2.08 \| good	7.264 \| good	0.232 \| good
2026-02-13T06:00:00.000Z	44 \| good	8.086 \| good	35.334 \| good	9.958 \| good	1.984 \| good	6.87 \| good	0.231 \| good
2026-02-13T07:00:00.000Z	49 \| good	8.883 \| good	39.207 \| good	4.694 \| good	1.879 \| good	6.328 \| good	0.227 \| good
2026-02-13T08:00:00.000Z	49 \| good	8.533 \| good	37.176 \| good	5.04 \| good	1.774 \| good	5.785 \| good	0.223 \| good
2026-02-13T09:00:00.000Z	44 \| good	8.178 \| good	36.091 \| good	4.21 \| good	1.669 \| good	5.242 \| good	0.22 \| good
2026-02-13T10:00:00.000Z	54 \| moderate	11.433 \| good	51.078 \| good	4.907 \| good	1.574 \| good	5.2 \| good	0.219 \| good
2026-02-13T11:00:00.000Z	58 \| moderate	12.789 \| fine	57.442 \| fine	4.079 \| good	1.478 \| good	5.159 \| good	0.218 \| good
2026-02-13T12:00:00.000Z	58 \| moderate	12.763 \| fine	57.367 \| fine	3.71 \| good	1.383 \| good	5.117 \| good	0.217 \| good
2026-02-13T13:00:00.000Z	58 \| moderate	12.501 \| fine	56.911 \| fine	4.17 \| good	1.395 \| good	5.322 \| good	0.227 \| good
2026-02-13T14:00:00.000Z	56 \| moderate	12.175 \| fine	54.556 \| good	8.254 \| good	1.408 \| good	5.527 \| good	0.237 \| good
2026-02-13T15:00:00.000Z	54 \| moderate	11.26 \| good	49.728 \| good	14.124 \| good	1.42 \| good	5.732 \| good	0.246 \| good
2026-02-13T16:00:00.000Z	52 \| moderate	10.297 \| good	45.448 \| good	21.086 \| good	1.534 \| good	4.955 \| good	0.236 \| good
2026-02-13T17:00:00.000Z	52 \| moderate	10.021 \| good	44.742 \| good	24.159 \| good	1.647 \| good	4.179 \| good	0.226 \| good
2026-02-13T18:00:00.000Z	56 \| moderate	12.279 \| fine	55.219 \| fine	28.934 \| good	1.76 \| good	3.402 \| good	0.216 \| good
2026-02-13T19:00:00.000Z	58 \| moderate	13.253 \| fine	59.266 \| fine	31.286 \| good	1.762 \| good	3.13 \| good	0.208 \| good
2026-02-13T20:00:00.000Z	62 \| moderate	14.564 \| fine	65.307 \| fine	31.574 \| good	1.764 \| good	2.858 \| good	0.2 \| good
2026-02-13T21:00:00.000Z	62 \| moderate	14.858 \| fine	66.664 \| fine	31.09 \| good	1.765 \| good	2.586 \| good	0.192 \| good
2026-02-13T22:00:00.000Z	62 \| moderate	15.412 \| fine	68.927 \| fine	27.248 \| good	1.751 \| good	6.917 \| good	0.227 \| good
2026-02-13T23:00:00.000Z	62 \| moderate	14.539 \| fine	65.569 \| fine	17.273 \| good	1.738 \| good	11.247 \| good	0.261 \| good
2026-02-14T00:00:00.000Z	62 \| moderate	14.886 \| fine	66.283 \| fine	14.031 \| good	1.724 \| good	15.578 \| good	0.296 \| good
2026-02-14T01:00:00.000Z	58 \| moderate	13.018 \| fine	58.127 \| fine	13.794 \| good	1.651 \| good	14.682 \| good	0.293 \| good
2026-02-14T02:00:00.000Z	56 \| moderate	11.672 \| good	51.877 \| good	13.215 \| good	1.578 \| good	13.785 \| good	0.29 \| good
2026-02-14T03:00:00.000Z	56 \| moderate	11.606 \| good	51.612 \| good	10.243 \| good	1.505 \| good	12.888 \| good	0.287 \| good
2026-02-14T04:00:00.000Z	54 \| moderate	10.831 \| good	48.049 \| good	8.388 \| good	1.424 \| good	12.063 \| good	0.279 \| good
2026-02-14T05:00:00.000Z	52 \| moderate	9.875 \| good	43.715 \| good	9.69 \| good	1.342 \| good	11.237 \| good	0.27 \| good
2026-02-14T06:00:00.000Z	56 \| moderate	11.789 \| good	11.86 \| good	20.239 \| good	1.275 \| good	10.622 \| good	0.265 \| good
2026-02-14T07:00:00.000Z	54 \| moderate	11.355 \| good	50.486 \| good	6.404 \| good	1.224 \| good	9.929 \| good	0.257 \| good
2026-02-14T08:00:00.000Z	49 \| good	8.822 \| good	38.688 \| good	7.492 \| good	1.188 \| good	9.447 \| good	0.252 \| good
2026-02-14T09:00:00.000Z	44 \| good	7.729 \| good	34.365 \| good	6.103 \| good	1.151 \| good	8.964 \| good	0.248 \| good
2026-02-14T10:00:00.000Z	56 \| moderate	11.524 \| good	51.306 \| good	8.56 \| good	1.139 \| good	9.009 \| good	0.245 \| good
2026-02-14T11:00:00.000Z	56 \| moderate	11.943 \| good	52.892 \| good	6.244 \| good	1.128 \| good	9.053 \| good	0.243 \| good
2026-02-14T12:00:00.000Z	58 \| moderate	12.792 \| fine	12.879 \| good	16.342 \| good	1.122 \| good	9.158 \| good	0.242 \| good
2026-02-14T13:00:00.000Z	60 \| moderate	13.536 \| fine	13.625 \| good	14.67 \| good	1.218 \| good	10.593 \| good	0.262 \| good

St. Louis

Empower business decisions with accurate air quality data

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

0.64ppm

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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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 12:00:00, 2026-02-12.

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 12:00:00 on 2026-02-12.

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

The air quality in St. Louis, Missouri right now is Unhealthy for Sensitive Groups, with an AQI of 113.

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

In St. Louis, Missouri, PM10 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 18.885 μg/m³.

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

St. Louis, Missouri currently has a PM₁₀ concentration of 178.517 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 0.609 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 1.334 ppb.

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

St. Louis, Missouri currently has an ozone (O₃) concentration of 6.052 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 32.113 ppb.

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