What is the current concentration of PM10 in Maryland Heights, Missouri?

The current PM10 concentration at Maryland Heights, Missouri is 15.825 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Maryland Heights, Missouri?

The current sulfur dioxide (SO2) concentration at Maryland Heights, Missouri is 0.387 ppb.

What is the current concentration of ozone (O3) in Maryland Heights, Missouri?

The current ozone (O3) concentration at Maryland Heights, Missouri is 22.367 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Maryland Heights, Missouri?

The current nitrogen dioxide (NO2) concentration at Maryland Heights, Missouri is 11.548 ppb.

Maryland Heights, Missouri live air quality index now

Q: What is the current concentration of PM2.5 in Maryland Heights, Missouri?

The current PM2.5 concentration at Maryland Heights, Missouri is 3.024 μg/m3.

Stay updated with real-time air quality in Maryland Heights, 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)

Good

Maryland Heights, Missouri

Last updated: ... (Local time)

Major air pollutants in Maryland Heights, Missouri

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.13 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

9.56 μg/m³

155

255

425

605+

Ozone (O₃)

29.42 ppb

201

201+

Sulfur Dioxide (SO₂)

0.50 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.94 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Maryland Heights, Missouri

Get Live Pollen Counts

Maryland Heights, Missouri

Scroll To Air Quality Map

Track live Maryland Heights, Missouri air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T20:00:00.000Z	32 \| good	1.787 \| good	7.825 \| good	35.038 \| good	0.674 \| good	4.947 \| good	0.263 \| good
2025-10-20T21:00:00.000Z	34 \| good	2.067 \| good	8.604 \| good	36.614 \| good	0.86 \| good	5.604 \| good	0.199 \| good
2025-10-20T22:00:00.000Z	34 \| good	2.432 \| good	10.332 \| good	36.839 \| good	0.947 \| good	5.684 \| good	0.195 \| good
2025-10-20T23:00:00.000Z	34 \| good	2.734 \| good	13.162 \| good	37.061 \| good	1.011 \| good	6.195 \| good	0.26 \| good
2025-10-21T00:00:00.000Z	33 \| good	2.326 \| good	10.638 \| good	36.193 \| good	0.966 \| good	6.644 \| good	0.26 \| good
2025-10-21T01:00:00.000Z	34 \| good	2.42 \| good	10.435 \| good	36.547 \| good	0.815 \| good	6.698 \| good	0.26 \| good
2025-10-21T02:00:00.000Z	33 \| good	3.493 \| good	14.719 \| good	35.97 \| good	0.84 \| good	6.595 \| good	0.195 \| good
2025-10-21T03:00:00.000Z	32 \| good	3.155 \| good	13.296 \| good	34.806 \| good	0.821 \| good	2.666 \| good	0.143 \| good
2025-10-21T04:00:00.000Z	31 \| good	2.81 \| good	11.285 \| good	34.462 \| good	0.878 \| good	5.09 \| good	0.225 \| good
2025-10-21T05:00:00.000Z	31 \| good	2.327 \| good	11.512 \| good	34.458 \| good	0.829 \| good	2.874 \| good	0.135 \| good
2025-10-21T06:00:00.000Z	31 \| good	2.643 \| good	15.003 \| good	33.185 \| good	1.037 \| good	2.754 \| good	0.136 \| good
2025-10-21T07:00:00.000Z	31 \| good	1.976 \| good	10.294 \| good	33.938 \| good	1.031 \| good	2.758 \| good	0.133 \| good
2025-10-21T08:00:00.000Z	31 \| good	1.827 \| good	11.705 \| good	32.876 \| good	1.028 \| good	2.77 \| good	0.138 \| good
2025-10-21T09:00:00.000Z	30 \| good	2.163 \| good	10.676 \| good	32.385 \| good	0.179 \| good	3.808 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	25 \| good	1.809 \| good	7.439 \| good	27.107 \| good	0.432 \| good	6.186 \| good	0.164 \| good
2025-10-21T11:00:00.000Z	21 \| good	2.209 \| good	9.601 \| good	23.125 \| good	0.454 \| good	9.024 \| good	0.196 \| good
2025-10-21T12:00:00.000Z	21 \| good	2.464 \| good	12.031 \| good	23.469 \| good	0.438 \| good	10.773 \| good	0.261 \| good
2025-10-21T13:00:00.000Z	23 \| good	2.496 \| good	12.025 \| good	24.832 \| good	0.439 \| good	10.86 \| good	0.271 \| good
2025-10-21T14:00:00.000Z	22 \| good	3.208 \| good	13.238 \| good	24.104 \| good	0.698 \| good	9.394 \| good	0.301 \| good
2025-10-21T15:00:00.000Z	24 \| good	2.734 \| good	10.294 \| good	25.927 \| good	2.46 \| good	7.619 \| good	0.261 \| good
2025-10-21T16:00:00.000Z	25 \| good	2.812 \| good	11.841 \| good	26.765 \| good	0.957 \| good	5.891 \| good	0.195 \| good
2025-10-21T17:00:00.000Z	27 \| good	2.987 \| good	10.913 \| good	29.233 \| good	0.541 \| good	4.249 \| good	0.195 \| good
2025-10-21T18:00:00.000Z	30 \| good	4.039 \| good	18.506 \| good	31.942 \| good	0.478 \| good	4.159 \| good	0.167 \| good
2025-10-21T19:00:00.000Z	30 \| good	3.189 \| good	12.592 \| good	32.493 \| good	0.465 \| good	4.768 \| good	0.196 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.979 \| good	12.589 \| good	33.45 \| good	0.458 \| good	4.332 \| good	0.196 \| good
2025-10-21T21:00:00.000Z	30 \| good	2.389 \| good	17.361 \| good	32.322 \| good	0.355 \| good	4.365 \| good	0.13 \| good
2025-10-21T22:00:00.000Z	31 \| good	1.342 \| good	9.359 \| good	32.792 \| good	0.416 \| good	4.207 \| good	0.102 \| good
2025-10-21T23:00:00.000Z	30 \| good	1.693 \| good	8.515 \| good	32.177 \| good	0.411 \| good	3.969 \| good	0.102 \| good
2025-10-22T00:00:00.000Z	31 \| good	2.082 \| good	10.311 \| good	32.982 \| good	0.462 \| good	5.848 \| good	0.102 \| good
2025-10-22T01:00:00.000Z	30 \| good	1.761 \| good	12.133 \| good	31.521 \| good	0.527 \| good	6.213 \| good	0.13 \| good
2025-10-22T02:00:00.000Z	29 \| good	1.842 \| good	10.287 \| good	30.622 \| good	0.513 \| good	8.033 \| good	0.195 \| good
2025-10-22T03:00:00.000Z	23 \| good	1.429 \| good	5.677 \| good	24.97 \| good	0.459 \| good	2.825 \| good	0.135 \| good
2025-10-22T04:00:00.000Z	26 \| good	2.33 \| good	16.408 \| good	28.165 \| good	0.418 \| good	7.906 \| good	0.195 \| good
2025-10-22T05:00:00.000Z	24 \| good	2.148 \| good	10.776 \| good	26.188 \| good	0.509 \| good	6.588 \| good	0.197 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.209 \| good	13.561 \| good	25.103 \| good	0.449 \| good	6.002 \| good	0.195 \| good
2025-10-22T07:00:00.000Z	23 \| good	2.166 \| good	14.283 \| good	25.326 \| good	0.448 \| good	6.074 \| good	0.195 \| good
2025-10-22T08:00:00.000Z	23 \| good	1.834 \| good	10.205 \| good	24.936 \| good	0.449 \| good	6.148 \| good	0.195 \| good
2025-10-22T09:00:00.000Z	23 \| good	1.74 \| good	12.527 \| good	24.616 \| good	0.58 \| good	1.993 \| good	0.166 \| good
2025-10-22T10:00:00.000Z	21 \| good	1.388 \| good	9.274 \| good	23.015 \| good	0.43 \| good	4.98 \| good	0.13 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.096 \| good	10.845 \| good	22.96 \| good	0.421 \| good	6.228 \| good	0.195 \| good
2025-10-22T12:00:00.000Z	20 \| good	2.424 \| good	12.88 \| good	22.448 \| good	0.357 \| good	9.579 \| good	0.259 \| good
2025-10-22T13:00:00.000Z	21 \| good	2.513 \| good	11.668 \| good	22.975 \| good	0.338 \| good	11.487 \| good	0.323 \| good
2025-10-22T14:00:00.000Z	20 \| good	2.006 \| good	11.467 \| good	22.339 \| good	0.611 \| good	10.034 \| good	0.299 \| good
2025-10-22T15:00:00.000Z	22 \| good	2.108 \| good	9.163 \| good	24.329 \| good	0.507 \| good	7.164 \| good	0.259 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.237 \| good	8.601 \| good	25.82 \| good	0.472 \| good	5.929 \| good	0.195 \| good
2025-10-22T17:00:00.000Z	26 \| good	2.108 \| good	12.046 \| good	27.855 \| good	0.553 \| good	4.867 \| good	0.195 \| good
2025-10-22T18:00:00.000Z	28 \| good	2.007 \| good	9.531 \| good	29.918 \| good	0.474 \| good	4.775 \| good	0.195 \| good
2025-10-22T19:00:00.000Z	31 \| good	1.97 \| good	10.319 \| good	32.763 \| good	0.442 \| good	3.865 \| good	0.195 \| good
2025-10-22T19:00:00.000Z	27 \| good	2.132 \| good	9.556 \| good	29.416 \| good	0.503 \| good	5.941 \| good	0.193 \| good
2025-10-22T13:00:00.000Z	19 \| good	3.313 \| good	14.189 \| good	21.099 \| good	0.557 \| good	2.662 \| good	0.127 \| good
2025-10-22T14:00:00.000Z	23 \| good	2.151 \| good	9.095 \| good	25.19 \| good	0.6 \| good	2.57 \| good	0.131 \| good
2025-10-22T15:00:00.000Z	23 \| good	1.362 \| good	5.153 \| good	24.883 \| good	0.643 \| good	2.477 \| good	0.135 \| good
2025-10-22T16:00:00.000Z	24 \| good	0.841 \| good	3.115 \| good	26.368 \| good	0.634 \| good	2.053 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	27 \| good	0.186 \| good	0.129 \| good	29.485 \| good	0.626 \| good	1.629 \| good	0.127 \| good
2025-10-22T18:00:00.000Z	29 \| good	1.065 \| good	3.956 \| good	30.597 \| good	0.617 \| good	1.204 \| good	0.123 \| good
2025-10-22T19:00:00.000Z	29 \| good	0.965 \| good	4.008 \| good	31.13 \| good	0.595 \| good	1.185 \| good	0.124 \| good
2025-10-22T20:00:00.000Z	28 \| good	1.259 \| good	5.094 \| good	30.336 \| good	0.574 \| good	1.165 \| good	0.124 \| good
2025-10-22T21:00:00.000Z	27 \| good	0.508 \| good	2.035 \| good	28.582 \| good	0.552 \| good	1.146 \| good	0.124 \| good
2025-10-22T22:00:00.000Z	25 \| good	0.382 \| good	1.093 \| good	27.399 \| good	0.594 \| good	3.345 \| good	0.143 \| good
2025-10-22T23:00:00.000Z	19 \| good	0.727 \| good	2.984 \| good	19.712 \| good	0.636 \| good	5.544 \| good	0.162 \| good
2025-10-23T00:00:00.000Z	17 \| good	0.377 \| good	1.15 \| good	17.712 \| good	0.678 \| good	7.743 \| good	0.18 \| good
2025-10-23T01:00:00.000Z	19 \| good	1.271 \| good	4.888 \| good	19.578 \| good	0.747 \| good	9.921 \| good	0.197 \| good
2025-10-23T02:00:00.000Z	19 \| good	1.57 \| good	6.847 \| good	20.617 \| good	0.816 \| good	12.1 \| good	0.215 \| good
2025-10-23T03:00:00.000Z	18 \| good	1.442 \| good	5.965 \| good	18.531 \| good	0.885 \| good	14.278 \| good	0.232 \| good
2025-10-23T04:00:00.000Z	18 \| good	0.197 \| good	0.206 \| good	18.646 \| good	0.819 \| good	12.2 \| good	0.216 \| good
2025-10-23T05:00:00.000Z	17 \| good	1.039 \| good	3.933 \| good	17.704 \| good	0.754 \| good	10.121 \| good	0.199 \| good
2025-10-23T06:00:00.000Z	14 \| good	0.872 \| good	3.112 \| good	14.577 \| good	0.688 \| good	8.043 \| good	0.183 \| good
2025-10-23T07:00:00.000Z	12 \| good	0.308 \| good	1.095 \| good	12.507 \| good	0.668 \| good	7.002 \| good	0.172 \| good
2025-10-23T08:00:00.000Z	11 \| good	1.587 \| good	6.097 \| good	10.281 \| good	0.648 \| good	5.962 \| good	0.16 \| good
2025-10-23T09:00:00.000Z	7 \| good	0.739 \| good	2.968 \| good	8.041 \| good	0.628 \| good	4.922 \| good	0.149 \| good
2025-10-23T10:00:00.000Z	11 \| good	2.42 \| good	9.87 \| good	2.747 \| good	0.66 \| good	5.856 \| good	0.155 \| good
2025-10-23T11:00:00.000Z	27 \| good	5.406 \| good	22.819 \| good	1.473 \| good	0.693 \| good	6.791 \| good	0.16 \| good
2025-10-23T12:00:00.000Z	49 \| good	8.65 \| good	37.696 \| good	0.711 \| good	0.725 \| good	7.726 \| good	0.166 \| good
2025-10-23T13:00:00.000Z	49 \| good	9.182 \| good	40.595 \| good	2.803 \| good	0.812 \| good	6.858 \| good	0.169 \| good
2025-10-23T14:00:00.000Z	44 \| good	7.666 \| good	33.816 \| good	10.028 \| good	0.899 \| good	5.99 \| good	0.173 \| good
2025-10-23T15:00:00.000Z	27 \| good	4.707 \| good	20.857 \| good	16.593 \| good	0.985 \| good	5.122 \| good	0.176 \| good
2025-10-23T16:00:00.000Z	27 \| good	4.647 \| good	19.919 \| good	22.259 \| good	0.898 \| good	3.85 \| good	0.162 \| good
2025-10-23T17:00:00.000Z	24 \| good	2.551 \| good	10.062 \| good	25.641 \| good	0.811 \| good	2.578 \| good	0.147 \| good
2025-10-23T18:00:00.000Z	27 \| good	3.354 \| good	14.926 \| good	28.815 \| good	0.724 \| good	1.306 \| good	0.132 \| good
2025-10-23T19:00:00.000Z	29 \| good	3.473 \| good	15.13 \| good	30.737 \| good	0.691 \| good	1.287 \| good	0.131 \| good
2025-10-23T20:00:00.000Z	30 \| good	3.398 \| good	15.1 \| good	32.315 \| good	0.658 \| good	1.269 \| good	0.13 \| good
2025-10-23T21:00:00.000Z	29 \| good	2.324 \| good	9.937 \| good	30.912 \| good	0.625 \| good	1.251 \| good	0.129 \| good
2025-10-23T22:00:00.000Z	38 \| good	7.201 \| good	31.837 \| good	27.016 \| good	0.671 \| good	5.204 \| good	0.162 \| good
2025-10-23T23:00:00.000Z	44 \| good	7.988 \| good	35.087 \| good	16.787 \| good	0.718 \| good	9.157 \| good	0.195 \| good
2025-10-24T00:00:00.000Z	56 \| moderate	12.229 \| fine	54.65 \| good	8.786 \| good	0.764 \| good	13.11 \| good	0.229 \| good
2025-10-24T01:00:00.000Z	58 \| moderate	13.305 \| fine	60.485 \| fine	5.82 \| good	0.905 \| good	17.144 \| good	0.261 \| good
2025-10-24T02:00:00.000Z	64 \| moderate	16.06 \| fine	70.614 \| fine	5.935 \| good	1.046 \| good	21.178 \| good	0.293 \| good
2025-10-24T03:00:00.000Z	66 \| moderate	16.599 \| fine	72.797 \| fine	6.603 \| good	1.186 \| good	25.212 \| good	0.325 \| good
2025-10-24T04:00:00.000Z	58 \| moderate	13.352 \| fine	61.01 \| fine	8.98 \| good	1.173 \| good	24.943 \| good	0.326 \| good
2025-10-24T05:00:00.000Z	54 \| moderate	10.812 \| good	48.278 \| good	11.123 \| good	1.16 \| good	24.674 \| good	0.328 \| good
2025-10-24T06:00:00.000Z	64 \| moderate	15.914 \| fine	16.053 \| good	5.371 \| good	1.139 \| good	24.443 \| good	0.328 \| good
2025-10-24T07:00:00.000Z	44 \| good	7.86 \| good	34.14 \| good	13.441 \| good	1.039 \| good	21.162 \| good	0.3 \| good
2025-10-24T08:00:00.000Z	44 \| good	7.952 \| good	35.078 \| good	14.57 \| good	0.932 \| good	17.919 \| good	0.27 \| good
2025-10-24T09:00:00.000Z	44 \| good	7.535 \| good	33.145 \| good	14.597 \| good	0.824 \| good	14.676 \| good	0.241 \| good
2025-10-24T10:00:00.000Z	44 \| good	8.291 \| good	36.107 \| good	11.405 \| good	0.803 \| good	13.72 \| good	0.231 \| good
2025-10-24T11:00:00.000Z	49 \| good	9.385 \| good	42.088 \| good	7.509 \| good	0.783 \| good	12.763 \| good	0.222 \| good
2025-10-24T12:00:00.000Z	54 \| moderate	10.502 \| good	10.685 \| good	13.225 \| good	0.751 \| good	11.698 \| good	0.211 \| good

Maryland Heights

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Maryland Heights, Missouri air quality map: Track AQI near you

0.20ppm

How accurate is Missouri, USA air quality data?

Air quality data and pollutant measurements for Missouri, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for Maryland Heights, Missouri updated?

The air quality for Maryland Heights, Missouri is updated every hour.

When was the worst air quality at Maryland Heights, Missouri in the last 24 hrs?

The worst air quality in Maryland Heights, Missouri in the last 24 hours was observed at 12:00:00 on 2025-10-22.

When was the best air quality at Maryland Heights, Missouri in the last 24 hrs?

In the last 24 hrs, the best air quality in Maryland Heights, Missouri was observed at 12:00:00 on 2025-10-21.

What is the current air quality in Maryland Heights, Missouri?

The current air quality in Maryland Heights, Missouri is 20, categorized as Good based on real-time data.

What pollutant is the most common in Maryland Heights, Missouri?

The most common pollutant in Maryland Heights, Missouri is O3.

What should I do if the air quality in Maryland Heights, Missouri is poor?

If the air quality in Maryland Heights, Missouri is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Maryland Heights, Missouri?

The current PM_2.5 concentration at Maryland Heights, Missouri is 3.024 μg/m³.

What is the current concentration of PM₁₀ in Maryland Heights, Missouri?

The current PM₁₀ concentration at Maryland Heights, Missouri is 15.825 μg/m³.

What is the current concentration of carbon monoxide (CO) in Maryland Heights, Missouri?

The current carbon monoxide (CO) concentration at Maryland Heights, Missouri is 0.248 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Maryland Heights, Missouri?

The current sulfur dioxide (SO₂) concentration at Maryland Heights, Missouri is 0.387 ppb.

What is the current concentration of ozone (O₃) in Maryland Heights, Missouri?

The current ozone (O₃) concentration at Maryland Heights, Missouri is 22.367 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Maryland Heights, Missouri?

The current nitrogen dioxide (NO₂) concentration at Maryland Heights, Missouri is 11.548 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-20T20:00:00.000Z	32 \| good	1.787 \| good	7.825 \| good	35.038 \| good	0.674 \| good	4.947 \| good	0.263 \| good
2025-10-20T21:00:00.000Z	34 \| good	2.067 \| good	8.604 \| good	36.614 \| good	0.86 \| good	5.604 \| good	0.199 \| good
2025-10-20T22:00:00.000Z	34 \| good	2.432 \| good	10.332 \| good	36.839 \| good	0.947 \| good	5.684 \| good	0.195 \| good
2025-10-20T23:00:00.000Z	34 \| good	2.734 \| good	13.162 \| good	37.061 \| good	1.011 \| good	6.195 \| good	0.26 \| good
2025-10-21T00:00:00.000Z	33 \| good	2.326 \| good	10.638 \| good	36.193 \| good	0.966 \| good	6.644 \| good	0.26 \| good
2025-10-21T01:00:00.000Z	34 \| good	2.42 \| good	10.435 \| good	36.547 \| good	0.815 \| good	6.698 \| good	0.26 \| good
2025-10-21T02:00:00.000Z	33 \| good	3.493 \| good	14.719 \| good	35.97 \| good	0.84 \| good	6.595 \| good	0.195 \| good
2025-10-21T03:00:00.000Z	32 \| good	3.155 \| good	13.296 \| good	34.806 \| good	0.821 \| good	2.666 \| good	0.143 \| good
2025-10-21T04:00:00.000Z	31 \| good	2.81 \| good	11.285 \| good	34.462 \| good	0.878 \| good	5.09 \| good	0.225 \| good
2025-10-21T05:00:00.000Z	31 \| good	2.327 \| good	11.512 \| good	34.458 \| good	0.829 \| good	2.874 \| good	0.135 \| good
2025-10-21T06:00:00.000Z	31 \| good	2.643 \| good	15.003 \| good	33.185 \| good	1.037 \| good	2.754 \| good	0.136 \| good
2025-10-21T07:00:00.000Z	31 \| good	1.976 \| good	10.294 \| good	33.938 \| good	1.031 \| good	2.758 \| good	0.133 \| good
2025-10-21T08:00:00.000Z	31 \| good	1.827 \| good	11.705 \| good	32.876 \| good	1.028 \| good	2.77 \| good	0.138 \| good
2025-10-21T09:00:00.000Z	30 \| good	2.163 \| good	10.676 \| good	32.385 \| good	0.179 \| good	3.808 \| good	0.221 \| good
2025-10-21T10:00:00.000Z	25 \| good	1.809 \| good	7.439 \| good	27.107 \| good	0.432 \| good	6.186 \| good	0.164 \| good
2025-10-21T11:00:00.000Z	21 \| good	2.209 \| good	9.601 \| good	23.125 \| good	0.454 \| good	9.024 \| good	0.196 \| good
2025-10-21T12:00:00.000Z	21 \| good	2.464 \| good	12.031 \| good	23.469 \| good	0.438 \| good	10.773 \| good	0.261 \| good
2025-10-21T13:00:00.000Z	23 \| good	2.496 \| good	12.025 \| good	24.832 \| good	0.439 \| good	10.86 \| good	0.271 \| good
2025-10-21T14:00:00.000Z	22 \| good	3.208 \| good	13.238 \| good	24.104 \| good	0.698 \| good	9.394 \| good	0.301 \| good
2025-10-21T15:00:00.000Z	24 \| good	2.734 \| good	10.294 \| good	25.927 \| good	2.46 \| good	7.619 \| good	0.261 \| good
2025-10-21T16:00:00.000Z	25 \| good	2.812 \| good	11.841 \| good	26.765 \| good	0.957 \| good	5.891 \| good	0.195 \| good
2025-10-21T17:00:00.000Z	27 \| good	2.987 \| good	10.913 \| good	29.233 \| good	0.541 \| good	4.249 \| good	0.195 \| good
2025-10-21T18:00:00.000Z	30 \| good	4.039 \| good	18.506 \| good	31.942 \| good	0.478 \| good	4.159 \| good	0.167 \| good
2025-10-21T19:00:00.000Z	30 \| good	3.189 \| good	12.592 \| good	32.493 \| good	0.465 \| good	4.768 \| good	0.196 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.979 \| good	12.589 \| good	33.45 \| good	0.458 \| good	4.332 \| good	0.196 \| good
2025-10-21T21:00:00.000Z	30 \| good	2.389 \| good	17.361 \| good	32.322 \| good	0.355 \| good	4.365 \| good	0.13 \| good
2025-10-21T22:00:00.000Z	31 \| good	1.342 \| good	9.359 \| good	32.792 \| good	0.416 \| good	4.207 \| good	0.102 \| good
2025-10-21T23:00:00.000Z	30 \| good	1.693 \| good	8.515 \| good	32.177 \| good	0.411 \| good	3.969 \| good	0.102 \| good
2025-10-22T00:00:00.000Z	31 \| good	2.082 \| good	10.311 \| good	32.982 \| good	0.462 \| good	5.848 \| good	0.102 \| good
2025-10-22T01:00:00.000Z	30 \| good	1.761 \| good	12.133 \| good	31.521 \| good	0.527 \| good	6.213 \| good	0.13 \| good
2025-10-22T02:00:00.000Z	29 \| good	1.842 \| good	10.287 \| good	30.622 \| good	0.513 \| good	8.033 \| good	0.195 \| good
2025-10-22T03:00:00.000Z	23 \| good	1.429 \| good	5.677 \| good	24.97 \| good	0.459 \| good	2.825 \| good	0.135 \| good
2025-10-22T04:00:00.000Z	26 \| good	2.33 \| good	16.408 \| good	28.165 \| good	0.418 \| good	7.906 \| good	0.195 \| good
2025-10-22T05:00:00.000Z	24 \| good	2.148 \| good	10.776 \| good	26.188 \| good	0.509 \| good	6.588 \| good	0.197 \| good
2025-10-22T06:00:00.000Z	23 \| good	2.209 \| good	13.561 \| good	25.103 \| good	0.449 \| good	6.002 \| good	0.195 \| good
2025-10-22T07:00:00.000Z	23 \| good	2.166 \| good	14.283 \| good	25.326 \| good	0.448 \| good	6.074 \| good	0.195 \| good
2025-10-22T08:00:00.000Z	23 \| good	1.834 \| good	10.205 \| good	24.936 \| good	0.449 \| good	6.148 \| good	0.195 \| good
2025-10-22T09:00:00.000Z	23 \| good	1.74 \| good	12.527 \| good	24.616 \| good	0.58 \| good	1.993 \| good	0.166 \| good
2025-10-22T10:00:00.000Z	21 \| good	1.388 \| good	9.274 \| good	23.015 \| good	0.43 \| good	4.98 \| good	0.13 \| good
2025-10-22T11:00:00.000Z	21 \| good	2.096 \| good	10.845 \| good	22.96 \| good	0.421 \| good	6.228 \| good	0.195 \| good
2025-10-22T12:00:00.000Z	20 \| good	2.424 \| good	12.88 \| good	22.448 \| good	0.357 \| good	9.579 \| good	0.259 \| good
2025-10-22T13:00:00.000Z	21 \| good	2.513 \| good	11.668 \| good	22.975 \| good	0.338 \| good	11.487 \| good	0.323 \| good
2025-10-22T14:00:00.000Z	20 \| good	2.006 \| good	11.467 \| good	22.339 \| good	0.611 \| good	10.034 \| good	0.299 \| good
2025-10-22T15:00:00.000Z	22 \| good	2.108 \| good	9.163 \| good	24.329 \| good	0.507 \| good	7.164 \| good	0.259 \| good
2025-10-22T16:00:00.000Z	24 \| good	1.237 \| good	8.601 \| good	25.82 \| good	0.472 \| good	5.929 \| good	0.195 \| good
2025-10-22T17:00:00.000Z	26 \| good	2.108 \| good	12.046 \| good	27.855 \| good	0.553 \| good	4.867 \| good	0.195 \| good
2025-10-22T18:00:00.000Z	28 \| good	2.007 \| good	9.531 \| good	29.918 \| good	0.474 \| good	4.775 \| good	0.195 \| good
2025-10-22T19:00:00.000Z	31 \| good	1.97 \| good	10.319 \| good	32.763 \| good	0.442 \| good	3.865 \| good	0.195 \| good
2025-10-22T19:00:00.000Z	27 \| good	2.132 \| good	9.556 \| good	29.416 \| good	0.503 \| good	5.941 \| good	0.193 \| good
2025-10-22T13:00:00.000Z	19 \| good	3.313 \| good	14.189 \| good	21.099 \| good	0.557 \| good	2.662 \| good	0.127 \| good
2025-10-22T14:00:00.000Z	23 \| good	2.151 \| good	9.095 \| good	25.19 \| good	0.6 \| good	2.57 \| good	0.131 \| good
2025-10-22T15:00:00.000Z	23 \| good	1.362 \| good	5.153 \| good	24.883 \| good	0.643 \| good	2.477 \| good	0.135 \| good
2025-10-22T16:00:00.000Z	24 \| good	0.841 \| good	3.115 \| good	26.368 \| good	0.634 \| good	2.053 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	27 \| good	0.186 \| good	0.129 \| good	29.485 \| good	0.626 \| good	1.629 \| good	0.127 \| good
2025-10-22T18:00:00.000Z	29 \| good	1.065 \| good	3.956 \| good	30.597 \| good	0.617 \| good	1.204 \| good	0.123 \| good
2025-10-22T19:00:00.000Z	29 \| good	0.965 \| good	4.008 \| good	31.13 \| good	0.595 \| good	1.185 \| good	0.124 \| good
2025-10-22T20:00:00.000Z	28 \| good	1.259 \| good	5.094 \| good	30.336 \| good	0.574 \| good	1.165 \| good	0.124 \| good
2025-10-22T21:00:00.000Z	27 \| good	0.508 \| good	2.035 \| good	28.582 \| good	0.552 \| good	1.146 \| good	0.124 \| good
2025-10-22T22:00:00.000Z	25 \| good	0.382 \| good	1.093 \| good	27.399 \| good	0.594 \| good	3.345 \| good	0.143 \| good
2025-10-22T23:00:00.000Z	19 \| good	0.727 \| good	2.984 \| good	19.712 \| good	0.636 \| good	5.544 \| good	0.162 \| good
2025-10-23T00:00:00.000Z	17 \| good	0.377 \| good	1.15 \| good	17.712 \| good	0.678 \| good	7.743 \| good	0.18 \| good
2025-10-23T01:00:00.000Z	19 \| good	1.271 \| good	4.888 \| good	19.578 \| good	0.747 \| good	9.921 \| good	0.197 \| good
2025-10-23T02:00:00.000Z	19 \| good	1.57 \| good	6.847 \| good	20.617 \| good	0.816 \| good	12.1 \| good	0.215 \| good
2025-10-23T03:00:00.000Z	18 \| good	1.442 \| good	5.965 \| good	18.531 \| good	0.885 \| good	14.278 \| good	0.232 \| good
2025-10-23T04:00:00.000Z	18 \| good	0.197 \| good	0.206 \| good	18.646 \| good	0.819 \| good	12.2 \| good	0.216 \| good
2025-10-23T05:00:00.000Z	17 \| good	1.039 \| good	3.933 \| good	17.704 \| good	0.754 \| good	10.121 \| good	0.199 \| good
2025-10-23T06:00:00.000Z	14 \| good	0.872 \| good	3.112 \| good	14.577 \| good	0.688 \| good	8.043 \| good	0.183 \| good
2025-10-23T07:00:00.000Z	12 \| good	0.308 \| good	1.095 \| good	12.507 \| good	0.668 \| good	7.002 \| good	0.172 \| good
2025-10-23T08:00:00.000Z	11 \| good	1.587 \| good	6.097 \| good	10.281 \| good	0.648 \| good	5.962 \| good	0.16 \| good
2025-10-23T09:00:00.000Z	7 \| good	0.739 \| good	2.968 \| good	8.041 \| good	0.628 \| good	4.922 \| good	0.149 \| good
2025-10-23T10:00:00.000Z	11 \| good	2.42 \| good	9.87 \| good	2.747 \| good	0.66 \| good	5.856 \| good	0.155 \| good
2025-10-23T11:00:00.000Z	27 \| good	5.406 \| good	22.819 \| good	1.473 \| good	0.693 \| good	6.791 \| good	0.16 \| good
2025-10-23T12:00:00.000Z	49 \| good	8.65 \| good	37.696 \| good	0.711 \| good	0.725 \| good	7.726 \| good	0.166 \| good
2025-10-23T13:00:00.000Z	49 \| good	9.182 \| good	40.595 \| good	2.803 \| good	0.812 \| good	6.858 \| good	0.169 \| good
2025-10-23T14:00:00.000Z	44 \| good	7.666 \| good	33.816 \| good	10.028 \| good	0.899 \| good	5.99 \| good	0.173 \| good
2025-10-23T15:00:00.000Z	27 \| good	4.707 \| good	20.857 \| good	16.593 \| good	0.985 \| good	5.122 \| good	0.176 \| good
2025-10-23T16:00:00.000Z	27 \| good	4.647 \| good	19.919 \| good	22.259 \| good	0.898 \| good	3.85 \| good	0.162 \| good
2025-10-23T17:00:00.000Z	24 \| good	2.551 \| good	10.062 \| good	25.641 \| good	0.811 \| good	2.578 \| good	0.147 \| good
2025-10-23T18:00:00.000Z	27 \| good	3.354 \| good	14.926 \| good	28.815 \| good	0.724 \| good	1.306 \| good	0.132 \| good
2025-10-23T19:00:00.000Z	29 \| good	3.473 \| good	15.13 \| good	30.737 \| good	0.691 \| good	1.287 \| good	0.131 \| good
2025-10-23T20:00:00.000Z	30 \| good	3.398 \| good	15.1 \| good	32.315 \| good	0.658 \| good	1.269 \| good	0.13 \| good
2025-10-23T21:00:00.000Z	29 \| good	2.324 \| good	9.937 \| good	30.912 \| good	0.625 \| good	1.251 \| good	0.129 \| good
2025-10-23T22:00:00.000Z	38 \| good	7.201 \| good	31.837 \| good	27.016 \| good	0.671 \| good	5.204 \| good	0.162 \| good
2025-10-23T23:00:00.000Z	44 \| good	7.988 \| good	35.087 \| good	16.787 \| good	0.718 \| good	9.157 \| good	0.195 \| good
2025-10-24T00:00:00.000Z	56 \| moderate	12.229 \| fine	54.65 \| good	8.786 \| good	0.764 \| good	13.11 \| good	0.229 \| good
2025-10-24T01:00:00.000Z	58 \| moderate	13.305 \| fine	60.485 \| fine	5.82 \| good	0.905 \| good	17.144 \| good	0.261 \| good
2025-10-24T02:00:00.000Z	64 \| moderate	16.06 \| fine	70.614 \| fine	5.935 \| good	1.046 \| good	21.178 \| good	0.293 \| good
2025-10-24T03:00:00.000Z	66 \| moderate	16.599 \| fine	72.797 \| fine	6.603 \| good	1.186 \| good	25.212 \| good	0.325 \| good
2025-10-24T04:00:00.000Z	58 \| moderate	13.352 \| fine	61.01 \| fine	8.98 \| good	1.173 \| good	24.943 \| good	0.326 \| good
2025-10-24T05:00:00.000Z	54 \| moderate	10.812 \| good	48.278 \| good	11.123 \| good	1.16 \| good	24.674 \| good	0.328 \| good
2025-10-24T06:00:00.000Z	64 \| moderate	15.914 \| fine	16.053 \| good	5.371 \| good	1.139 \| good	24.443 \| good	0.328 \| good
2025-10-24T07:00:00.000Z	44 \| good	7.86 \| good	34.14 \| good	13.441 \| good	1.039 \| good	21.162 \| good	0.3 \| good
2025-10-24T08:00:00.000Z	44 \| good	7.952 \| good	35.078 \| good	14.57 \| good	0.932 \| good	17.919 \| good	0.27 \| good
2025-10-24T09:00:00.000Z	44 \| good	7.535 \| good	33.145 \| good	14.597 \| good	0.824 \| good	14.676 \| good	0.241 \| good
2025-10-24T10:00:00.000Z	44 \| good	8.291 \| good	36.107 \| good	11.405 \| good	0.803 \| good	13.72 \| good	0.231 \| good
2025-10-24T11:00:00.000Z	49 \| good	9.385 \| good	42.088 \| good	7.509 \| good	0.783 \| good	12.763 \| good	0.222 \| good
2025-10-24T12:00:00.000Z	54 \| moderate	10.502 \| good	10.685 \| good	13.225 \| good	0.751 \| good	11.698 \| good	0.211 \| good

Maryland Heights, Missouri live air quality index now

Major air pollutants in Maryland Heights, Missouri

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Air quality in nearby cities

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What is the current concentration of PM10 in Maryland Heights, Missouri?

What is the current concentration of carbon monoxide (CO) in Maryland Heights, Missouri?

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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 current concentration of PM_2.5 in Maryland Heights, Missouri?

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What is the current concentration of nitrogen dioxide (NO₂) in Maryland Heights, Missouri?