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

The current PM10 concentration at Maryland Heights, Missouri is 66.954 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 0.545 ppb.

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

The current ozone (O3) concentration at Maryland Heights, Missouri is 25.147 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 3.001 ppb.

Maryland Heights, Missouri live air quality index now

Name: Live air pollution levels in Maryland Heights, Missouri today
Creator: Ambee

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)

8.98 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

41.67 μg/m³

155

255

425

605+

Ozone (O₃)

31.10 ppb

201

201+

Sulfur Dioxide (SO₂)

0.20 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.06 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.28 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

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
2025-09-03T21:00:00.000Z	43 \| good	4.269 \| good	16.48 \| good	45.604 \| good	0.904 \| good	9.862 \| good	0.196 \| good
2025-09-03T22:00:00.000Z	42 \| good	6.516 \| good	24.464 \| good	45.284 \| good	0.888 \| good	8.207 \| good	0.196 \| good
2025-09-03T23:00:00.000Z	40 \| good	3.48 \| good	12.015 \| good	43.39 \| good	1.037 \| good	10.187 \| good	0.256 \| good
2025-09-04T00:00:00.000Z	40 \| good	5.03 \| good	19.763 \| good	43.312 \| good	0.326 \| good	15.218 \| good	0.196 \| good
2025-09-04T01:00:00.000Z	38 \| good	6.712 \| good	33.767 \| good	39.357 \| good	0.336 \| good	2.687 \| good	0.196 \| good
2025-09-04T02:00:00.000Z	35 \| good	5.16 \| good	24.427 \| good	37.957 \| good	0.596 \| good	2.701 \| good	0.194 \| good
2025-09-04T03:00:00.000Z	32 \| good	4.845 \| good	21.732 \| good	35.159 \| good	0.648 \| good	2.749 \| good	0.235 \| good
2025-09-04T04:00:00.000Z	29 \| good	4.468 \| good	19.966 \| good	31.412 \| good	0.588 \| good	1.981 \| good	0.196 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.326 \| good	24.972 \| good	27.505 \| good	0.544 \| good	1.641 \| good	0.196 \| good
2025-09-04T06:00:00.000Z	57 \| moderate	12.061 \| good	66.596 \| fine	25.126 \| good	0.161 \| good	1.124 \| good	0.196 \| good
2025-09-04T07:00:00.000Z	44 \| good	7.892 \| good	38.325 \| good	26.205 \| good	0.161 \| good	1.123 \| good	0.196 \| good
2025-09-04T08:00:00.000Z	38 \| good	6.53 \| good	21.945 \| good	26.215 \| good	0.161 \| good	1.123 \| good	0.196 \| good
2025-09-04T09:00:00.000Z	62 \| moderate	14.672 \| fine	45.878 \| good	17.105 \| good	0.49 \| good	2.435 \| good	0.232 \| good
2025-09-04T10:00:00.000Z	62 \| moderate	15.082 \| fine	59.121 \| fine	18.158 \| good	0.158 \| good	2.509 \| good	0.23 \| good
2025-09-04T11:00:00.000Z	62 \| moderate	14.681 \| fine	57.998 \| fine	17.224 \| good	0.614 \| good	4.319 \| good	0.232 \| good
2025-09-04T12:00:00.000Z	62 \| moderate	14.892 \| fine	64.102 \| fine	17.271 \| good	0.149 \| good	5.566 \| good	0.288 \| good
2025-09-04T13:00:00.000Z	62 \| moderate	15.015 \| fine	66.954 \| fine	25.147 \| good	0.545 \| good	3.001 \| good	0.21 \| good
2025-09-04T14:00:00.000Z	64 \| moderate	15.555 \| fine	70.462 \| fine	19.812 \| good	0.227 \| good	3.573 \| good	0.299 \| good
2025-09-04T15:00:00.000Z	60 \| moderate	13.682 \| fine	59.091 \| fine	23.925 \| good	0.561 \| good	2.817 \| good	0.295 \| good
2025-09-04T16:00:00.000Z	54 \| moderate	10.723 \| good	53.013 \| good	26.948 \| good	0.437 \| good	4.93 \| good	0.239 \| good
2025-09-04T17:00:00.000Z	60 \| moderate	13.562 \| fine	62.433 \| fine	29.78 \| good	0.439 \| good	4.891 \| good	0.239 \| good
2025-09-04T18:00:00.000Z	60 \| moderate	13.905 \| fine	59.624 \| fine	32.549 \| good	0.473 \| good	7.18 \| good	0.292 \| good
2025-09-04T19:00:00.000Z	52 \| moderate	10.461 \| good	38.297 \| good	34.977 \| good	0.271 \| good	7.97 \| good	0.291 \| good
2025-09-04T20:00:00.000Z	56 \| moderate	11.643 \| good	45.624 \| good	36.983 \| good	0.666 \| good	8.596 \| good	0.295 \| good
2025-09-04T21:00:00.000Z	56 \| moderate	11.727 \| good	42.064 \| good	38.765 \| good	0.383 \| good	10.108 \| good	0.295 \| good
2025-09-04T22:00:00.000Z	56 \| moderate	11.945 \| good	56.16 \| fine	41.734 \| good	3.053 \| good	9.03 \| good	0.295 \| good
2025-09-04T23:00:00.000Z	54 \| moderate	11.132 \| good	49.626 \| good	42.398 \| good	11.004 \| good	10.023 \| good	0.297 \| good
2025-09-05T00:00:00.000Z	52 \| moderate	9.917 \| good	47.589 \| good	41.629 \| good	6.45 \| good	14.1 \| good	0.263 \| good
2025-09-05T01:00:00.000Z	60 \| moderate	13.756 \| fine	65.427 \| fine	34.239 \| good	6.67 \| good	21.881 \| good	0.356 \| good
2025-09-05T02:00:00.000Z	53 \| moderate	9.592 \| good	60.464 \| fine	35.916 \| good	6.095 \| good	25.777 \| good	0.403 \| good
2025-09-05T03:00:00.000Z	52 \| moderate	9.532 \| good	42.519 \| good	29.466 \| good	4.621 \| good	30.411 \| good	0.352 \| good
2025-09-05T04:00:00.000Z	54 \| moderate	11.242 \| good	39.935 \| good	26.87 \| good	3.288 \| good	25.921 \| good	0.349 \| good
2025-09-05T05:00:00.000Z	58 \| moderate	13.257 \| fine	59.588 \| fine	22.068 \| good	1.45 \| good	21.112 \| good	0.349 \| good
2025-09-05T06:00:00.000Z	56 \| moderate	11.607 \| good	47.945 \| good	22.349 \| good	0.679 \| good	17.383 \| good	0.291 \| good
2025-09-05T07:00:00.000Z	56 \| moderate	12.047 \| good	49.83 \| good	19.382 \| good	0.68 \| good	17.054 \| good	0.291 \| good
2025-09-05T08:00:00.000Z	54 \| moderate	11.16 \| good	43.074 \| good	23.763 \| good	0.684 \| good	17.3 \| good	0.291 \| good
2025-09-05T09:00:00.000Z	60 \| moderate	13.582 \| fine	50.129 \| good	20.725 \| good	0.985 \| good	8.975 \| good	0.286 \| good
2025-09-05T10:00:00.000Z	62 \| moderate	15.147 \| fine	65.977 \| fine	17.642 \| good	1.277 \| good	6.683 \| good	0.286 \| good
2025-09-05T11:00:00.000Z	58 \| moderate	13.115 \| fine	42.651 \| good	17.048 \| good	1.171 \| good	13.145 \| good	0.288 \| good
2025-09-05T12:00:00.000Z	58 \| moderate	12.572 \| fine	56.836 \| fine	20.285 \| good	0.41 \| good	5.982 \| good	0.266 \| good
2025-09-05T13:00:00.000Z	58 \| moderate	12.967 \| fine	57.416 \| fine	21.947 \| good	0.322 \| good	5.086 \| good	0.288 \| good
2025-09-05T14:00:00.000Z	62 \| moderate	14.847 \| fine	71.932 \| fine	22.679 \| good	0.248 \| good	4.075 \| good	0.292 \| good
2025-09-05T15:00:00.000Z	49 \| good	8.938 \| good	31.475 \| good	23.654 \| good	0.4 \| good	3.043 \| good	0.334 \| good
2025-09-05T16:00:00.000Z	54 \| moderate	10.675 \| good	48.263 \| good	25.873 \| good	0.136 \| good	2.228 \| good	0.295 \| good
2025-09-05T17:00:00.000Z	44 \| good	8.464 \| good	40.698 \| good	28.073 \| good	0.143 \| good	3.067 \| good	0.292 \| good
2025-09-05T18:00:00.000Z	52 \| moderate	10.08 \| good	49.826 \| good	29.302 \| good	0.146 \| good	4.341 \| good	0.23 \| good
2025-09-05T19:00:00.000Z	49 \| good	9.24 \| good	41.42 \| good	29.888 \| good	0.263 \| good	5.433 \| good	0.229 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.985 \| good	41.667 \| good	31.099 \| good	0.202 \| good	2.056 \| good	0.283 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.985 \| good	41.667 \| good	31.099 \| good	0.202 \| good	2.056 \| good	0.283 \| good
2025-09-04T15:00:00.000Z	56 \| moderate	11.858 \| good	52.389 \| good	38.57 \| good	0.746 \| good	2.256 \| good	0.216 \| good
2025-09-04T16:00:00.000Z	49 \| good	9.205 \| good	41.228 \| good	42.698 \| good	0.685 \| good	1.79 \| good	0.21 \| good
2025-09-04T17:00:00.000Z	44 \| good	7.939 \| good	34.596 \| good	47.628 \| good	0.623 \| good	1.324 \| good	0.203 \| good
2025-09-04T18:00:00.000Z	43 \| good	6.885 \| good	30.189 \| good	45.949 \| good	0.562 \| good	0.859 \| good	0.197 \| good
2025-09-04T19:00:00.000Z	49 \| good	8.973 \| good	40.162 \| good	46.835 \| good	0.576 \| good	0.913 \| good	0.193 \| good
2025-09-04T20:00:00.000Z	45 \| good	7.709 \| good	33.677 \| good	49.21 \| good	0.59 \| good	0.967 \| good	0.19 \| good
2025-09-04T21:00:00.000Z	44 \| good	6.159 \| good	27.47 \| good	47.183 \| good	0.603 \| good	1.021 \| good	0.187 \| good
2025-09-04T22:00:00.000Z	43 \| good	5.302 \| good	22.766 \| good	45.999 \| good	0.706 \| good	2.344 \| good	0.199 \| good
2025-09-04T23:00:00.000Z	40 \| good	5.301 \| good	22.796 \| good	43.351 \| good	0.809 \| good	3.666 \| good	0.211 \| good
2025-09-05T00:00:00.000Z	34 \| good	6.377 \| good	28.26 \| good	36.932 \| good	0.911 \| good	4.989 \| good	0.223 \| good
2025-09-05T01:00:00.000Z	38 \| good	6.772 \| good	30.015 \| good	33.835 \| good	1.108 \| good	7.5 \| good	0.251 \| good
2025-09-05T02:00:00.000Z	52 \| moderate	10.429 \| good	45.924 \| good	32.294 \| good	1.305 \| good	10.011 \| good	0.279 \| good
2025-09-05T03:00:00.000Z	56 \| moderate	12.446 \| fine	56.422 \| fine	29.28 \| good	1.501 \| good	12.522 \| good	0.308 \| good
2025-09-05T04:00:00.000Z	58 \| moderate	13.278 \| fine	59.938 \| fine	27.748 \| good	1.648 \| good	10.801 \| good	0.296 \| good
2025-09-05T05:00:00.000Z	54 \| moderate	11.394 \| good	50.55 \| good	28.92 \| good	1.795 \| good	9.08 \| good	0.285 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	9.535 \| good	42.446 \| good	28.376 \| good	1.942 \| good	7.359 \| good	0.274 \| good
2025-09-05T07:00:00.000Z	27 \| good	4.738 \| good	20.552 \| good	23.716 \| good	1.65 \| good	6.377 \| good	0.261 \| good
2025-09-05T08:00:00.000Z	22 \| good	3.955 \| good	17.629 \| good	19.974 \| good	1.358 \| good	5.394 \| good	0.247 \| good
2025-09-05T09:00:00.000Z	18 \| good	3.021 \| good	12.176 \| good	19.171 \| good	1.066 \| good	4.412 \| good	0.234 \| good
2025-09-05T10:00:00.000Z	22 \| good	3.523 \| good	15.873 \| good	16.661 \| good	0.878 \| good	4.197 \| good	0.228 \| good
2025-09-05T11:00:00.000Z	44 \| good	7.957 \| good	34.922 \| good	18.167 \| good	0.691 \| good	3.983 \| good	0.222 \| good
2025-09-05T12:00:00.000Z	54 \| moderate	11.158 \| good	49.661 \| good	26.406 \| good	0.504 \| good	3.768 \| good	0.216 \| good
2025-09-05T13:00:00.000Z	54 \| moderate	11.167 \| good	49.749 \| good	30.607 \| good	0.522 \| good	3.338 \| good	0.216 \| good
2025-09-05T14:00:00.000Z	54 \| moderate	10.841 \| good	48.004 \| good	32.313 \| good	0.541 \| good	2.907 \| good	0.216 \| good
2025-09-05T15:00:00.000Z	52 \| moderate	10.119 \| good	44.974 \| good	33.643 \| good	0.56 \| good	2.477 \| good	0.216 \| good
2025-09-05T16:00:00.000Z	38 \| good	6.687 \| good	30.016 \| good	29.162 \| good	0.52 \| good	2.063 \| good	0.203 \| good
2025-09-05T17:00:00.000Z	27 \| good	5.019 \| good	22.015 \| good	28.675 \| good	0.48 \| good	1.648 \| good	0.19 \| good
2025-09-05T18:00:00.000Z	22 \| good	3.807 \| good	16.588 \| good	23.556 \| good	0.44 \| good	1.234 \| good	0.177 \| good
2025-09-05T19:00:00.000Z	25 \| good	4.154 \| good	18.14 \| good	27.077 \| good	0.472 \| good	1.879 \| good	0.181 \| good
2025-09-05T20:00:00.000Z	27 \| good	2.64 \| good	10.832 \| good	29.193 \| good	0.503 \| good	2.525 \| good	0.185 \| good
2025-09-05T21:00:00.000Z	25 \| good	3.527 \| good	15.597 \| good	26.812 \| good	0.535 \| good	3.17 \| good	0.189 \| good
2025-09-05T22:00:00.000Z	27 \| good	5.373 \| good	23.025 \| good	27.841 \| good	0.547 \| good	4.064 \| good	0.198 \| good
2025-09-05T23:00:00.000Z	27 \| good	4.129 \| good	18.292 \| good	29.374 \| good	0.558 \| good	4.958 \| good	0.207 \| good
2025-09-06T00:00:00.000Z	30 \| good	1.644 \| good	6.584 \| good	31.935 \| good	0.569 \| good	5.852 \| good	0.216 \| good
2025-09-06T01:00:00.000Z	28 \| good	2.431 \| good	9.895 \| good	29.738 \| good	0.541 \| good	5.658 \| good	0.214 \| good
2025-09-06T02:00:00.000Z	29 \| good	3.94 \| good	17.555 \| good	30.962 \| good	0.513 \| good	5.464 \| good	0.213 \| good
2025-09-06T03:00:00.000Z	29 \| good	3.037 \| good	12.058 \| good	31.305 \| good	0.485 \| good	5.27 \| good	0.212 \| good
2025-09-06T04:00:00.000Z	27 \| good	2.962 \| good	11.88 \| good	29.383 \| good	0.464 \| good	5.174 \| good	0.211 \| good
2025-09-06T05:00:00.000Z	23 \| good	3.508 \| good	15.742 \| good	25.111 \| good	0.442 \| good	5.078 \| good	0.211 \| good
2025-09-06T06:00:00.000Z	22 \| good	2.88 \| good	11.862 \| good	24.084 \| good	0.421 \| good	4.982 \| good	0.211 \| good
2025-09-06T07:00:00.000Z	22 \| good	3.543 \| good	15.979 \| good	19.852 \| good	0.434 \| good	5.291 \| good	0.211 \| good
2025-09-06T08:00:00.000Z	27 \| good	5.144 \| good	22.073 \| good	15.157 \| good	0.447 \| good	5.6 \| good	0.211 \| good
2025-09-06T09:00:00.000Z	38 \| good	6.718 \| good	29.994 \| good	10.619 \| good	0.46 \| good	5.909 \| good	0.211 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	9.989 \| good	44.273 \| good	13.187 \| good	0.514 \| good	6.581 \| good	0.214 \| good
2025-09-06T11:00:00.000Z	49 \| good	9.002 \| good	39.568 \| good	16.399 \| good	0.569 \| good	7.253 \| good	0.218 \| good
2025-09-06T12:00:00.000Z	49 \| good	8.927 \| good	39.085 \| good	17.962 \| good	0.623 \| good	7.924 \| good	0.222 \| good
2025-09-06T13:00:00.000Z	49 \| good	8.908 \| good	38.988 \| good	25.46 \| good	0.849 \| good	6.569 \| good	0.216 \| good
2025-09-06T14:00:00.000Z	38 \| good	6.69 \| good	29.807 \| good	30.079 \| good	1.075 \| good	5.213 \| good	0.209 \| good

Maryland Heights

Get reliable air quality data to drive your business

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

0.21ppm

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 01:00:00 on 2025-09-04.

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 05:00:00 on 2025-09-04.

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

The current air quality in Maryland Heights, Missouri is 62, categorized as Moderate based on real-time data.

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

The most common pollutant in Maryland Heights, Missouri is PM2.5.

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 15.015 μg/m³.

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

The current PM₁₀ concentration at Maryland Heights, Missouri is 66.954 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 0.21 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 0.545 ppb.

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

The current ozone (O₃) concentration at Maryland Heights, Missouri is 25.147 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 3.001 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-03T21:00:00.000Z	43 \| good	4.269 \| good	16.48 \| good	45.604 \| good	0.904 \| good	9.862 \| good	0.196 \| good
2025-09-03T22:00:00.000Z	42 \| good	6.516 \| good	24.464 \| good	45.284 \| good	0.888 \| good	8.207 \| good	0.196 \| good
2025-09-03T23:00:00.000Z	40 \| good	3.48 \| good	12.015 \| good	43.39 \| good	1.037 \| good	10.187 \| good	0.256 \| good
2025-09-04T00:00:00.000Z	40 \| good	5.03 \| good	19.763 \| good	43.312 \| good	0.326 \| good	15.218 \| good	0.196 \| good
2025-09-04T01:00:00.000Z	38 \| good	6.712 \| good	33.767 \| good	39.357 \| good	0.336 \| good	2.687 \| good	0.196 \| good
2025-09-04T02:00:00.000Z	35 \| good	5.16 \| good	24.427 \| good	37.957 \| good	0.596 \| good	2.701 \| good	0.194 \| good
2025-09-04T03:00:00.000Z	32 \| good	4.845 \| good	21.732 \| good	35.159 \| good	0.648 \| good	2.749 \| good	0.235 \| good
2025-09-04T04:00:00.000Z	29 \| good	4.468 \| good	19.966 \| good	31.412 \| good	0.588 \| good	1.981 \| good	0.196 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.326 \| good	24.972 \| good	27.505 \| good	0.544 \| good	1.641 \| good	0.196 \| good
2025-09-04T06:00:00.000Z	57 \| moderate	12.061 \| good	66.596 \| fine	25.126 \| good	0.161 \| good	1.124 \| good	0.196 \| good
2025-09-04T07:00:00.000Z	44 \| good	7.892 \| good	38.325 \| good	26.205 \| good	0.161 \| good	1.123 \| good	0.196 \| good
2025-09-04T08:00:00.000Z	38 \| good	6.53 \| good	21.945 \| good	26.215 \| good	0.161 \| good	1.123 \| good	0.196 \| good
2025-09-04T09:00:00.000Z	62 \| moderate	14.672 \| fine	45.878 \| good	17.105 \| good	0.49 \| good	2.435 \| good	0.232 \| good
2025-09-04T10:00:00.000Z	62 \| moderate	15.082 \| fine	59.121 \| fine	18.158 \| good	0.158 \| good	2.509 \| good	0.23 \| good
2025-09-04T11:00:00.000Z	62 \| moderate	14.681 \| fine	57.998 \| fine	17.224 \| good	0.614 \| good	4.319 \| good	0.232 \| good
2025-09-04T12:00:00.000Z	62 \| moderate	14.892 \| fine	64.102 \| fine	17.271 \| good	0.149 \| good	5.566 \| good	0.288 \| good
2025-09-04T13:00:00.000Z	62 \| moderate	15.015 \| fine	66.954 \| fine	25.147 \| good	0.545 \| good	3.001 \| good	0.21 \| good
2025-09-04T14:00:00.000Z	64 \| moderate	15.555 \| fine	70.462 \| fine	19.812 \| good	0.227 \| good	3.573 \| good	0.299 \| good
2025-09-04T15:00:00.000Z	60 \| moderate	13.682 \| fine	59.091 \| fine	23.925 \| good	0.561 \| good	2.817 \| good	0.295 \| good
2025-09-04T16:00:00.000Z	54 \| moderate	10.723 \| good	53.013 \| good	26.948 \| good	0.437 \| good	4.93 \| good	0.239 \| good
2025-09-04T17:00:00.000Z	60 \| moderate	13.562 \| fine	62.433 \| fine	29.78 \| good	0.439 \| good	4.891 \| good	0.239 \| good
2025-09-04T18:00:00.000Z	60 \| moderate	13.905 \| fine	59.624 \| fine	32.549 \| good	0.473 \| good	7.18 \| good	0.292 \| good
2025-09-04T19:00:00.000Z	52 \| moderate	10.461 \| good	38.297 \| good	34.977 \| good	0.271 \| good	7.97 \| good	0.291 \| good
2025-09-04T20:00:00.000Z	56 \| moderate	11.643 \| good	45.624 \| good	36.983 \| good	0.666 \| good	8.596 \| good	0.295 \| good
2025-09-04T21:00:00.000Z	56 \| moderate	11.727 \| good	42.064 \| good	38.765 \| good	0.383 \| good	10.108 \| good	0.295 \| good
2025-09-04T22:00:00.000Z	56 \| moderate	11.945 \| good	56.16 \| fine	41.734 \| good	3.053 \| good	9.03 \| good	0.295 \| good
2025-09-04T23:00:00.000Z	54 \| moderate	11.132 \| good	49.626 \| good	42.398 \| good	11.004 \| good	10.023 \| good	0.297 \| good
2025-09-05T00:00:00.000Z	52 \| moderate	9.917 \| good	47.589 \| good	41.629 \| good	6.45 \| good	14.1 \| good	0.263 \| good
2025-09-05T01:00:00.000Z	60 \| moderate	13.756 \| fine	65.427 \| fine	34.239 \| good	6.67 \| good	21.881 \| good	0.356 \| good
2025-09-05T02:00:00.000Z	53 \| moderate	9.592 \| good	60.464 \| fine	35.916 \| good	6.095 \| good	25.777 \| good	0.403 \| good
2025-09-05T03:00:00.000Z	52 \| moderate	9.532 \| good	42.519 \| good	29.466 \| good	4.621 \| good	30.411 \| good	0.352 \| good
2025-09-05T04:00:00.000Z	54 \| moderate	11.242 \| good	39.935 \| good	26.87 \| good	3.288 \| good	25.921 \| good	0.349 \| good
2025-09-05T05:00:00.000Z	58 \| moderate	13.257 \| fine	59.588 \| fine	22.068 \| good	1.45 \| good	21.112 \| good	0.349 \| good
2025-09-05T06:00:00.000Z	56 \| moderate	11.607 \| good	47.945 \| good	22.349 \| good	0.679 \| good	17.383 \| good	0.291 \| good
2025-09-05T07:00:00.000Z	56 \| moderate	12.047 \| good	49.83 \| good	19.382 \| good	0.68 \| good	17.054 \| good	0.291 \| good
2025-09-05T08:00:00.000Z	54 \| moderate	11.16 \| good	43.074 \| good	23.763 \| good	0.684 \| good	17.3 \| good	0.291 \| good
2025-09-05T09:00:00.000Z	60 \| moderate	13.582 \| fine	50.129 \| good	20.725 \| good	0.985 \| good	8.975 \| good	0.286 \| good
2025-09-05T10:00:00.000Z	62 \| moderate	15.147 \| fine	65.977 \| fine	17.642 \| good	1.277 \| good	6.683 \| good	0.286 \| good
2025-09-05T11:00:00.000Z	58 \| moderate	13.115 \| fine	42.651 \| good	17.048 \| good	1.171 \| good	13.145 \| good	0.288 \| good
2025-09-05T12:00:00.000Z	58 \| moderate	12.572 \| fine	56.836 \| fine	20.285 \| good	0.41 \| good	5.982 \| good	0.266 \| good
2025-09-05T13:00:00.000Z	58 \| moderate	12.967 \| fine	57.416 \| fine	21.947 \| good	0.322 \| good	5.086 \| good	0.288 \| good
2025-09-05T14:00:00.000Z	62 \| moderate	14.847 \| fine	71.932 \| fine	22.679 \| good	0.248 \| good	4.075 \| good	0.292 \| good
2025-09-05T15:00:00.000Z	49 \| good	8.938 \| good	31.475 \| good	23.654 \| good	0.4 \| good	3.043 \| good	0.334 \| good
2025-09-05T16:00:00.000Z	54 \| moderate	10.675 \| good	48.263 \| good	25.873 \| good	0.136 \| good	2.228 \| good	0.295 \| good
2025-09-05T17:00:00.000Z	44 \| good	8.464 \| good	40.698 \| good	28.073 \| good	0.143 \| good	3.067 \| good	0.292 \| good
2025-09-05T18:00:00.000Z	52 \| moderate	10.08 \| good	49.826 \| good	29.302 \| good	0.146 \| good	4.341 \| good	0.23 \| good
2025-09-05T19:00:00.000Z	49 \| good	9.24 \| good	41.42 \| good	29.888 \| good	0.263 \| good	5.433 \| good	0.229 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.985 \| good	41.667 \| good	31.099 \| good	0.202 \| good	2.056 \| good	0.283 \| good
2025-09-05T20:00:00.000Z	49 \| good	8.985 \| good	41.667 \| good	31.099 \| good	0.202 \| good	2.056 \| good	0.283 \| good
2025-09-04T15:00:00.000Z	56 \| moderate	11.858 \| good	52.389 \| good	38.57 \| good	0.746 \| good	2.256 \| good	0.216 \| good
2025-09-04T16:00:00.000Z	49 \| good	9.205 \| good	41.228 \| good	42.698 \| good	0.685 \| good	1.79 \| good	0.21 \| good
2025-09-04T17:00:00.000Z	44 \| good	7.939 \| good	34.596 \| good	47.628 \| good	0.623 \| good	1.324 \| good	0.203 \| good
2025-09-04T18:00:00.000Z	43 \| good	6.885 \| good	30.189 \| good	45.949 \| good	0.562 \| good	0.859 \| good	0.197 \| good
2025-09-04T19:00:00.000Z	49 \| good	8.973 \| good	40.162 \| good	46.835 \| good	0.576 \| good	0.913 \| good	0.193 \| good
2025-09-04T20:00:00.000Z	45 \| good	7.709 \| good	33.677 \| good	49.21 \| good	0.59 \| good	0.967 \| good	0.19 \| good
2025-09-04T21:00:00.000Z	44 \| good	6.159 \| good	27.47 \| good	47.183 \| good	0.603 \| good	1.021 \| good	0.187 \| good
2025-09-04T22:00:00.000Z	43 \| good	5.302 \| good	22.766 \| good	45.999 \| good	0.706 \| good	2.344 \| good	0.199 \| good
2025-09-04T23:00:00.000Z	40 \| good	5.301 \| good	22.796 \| good	43.351 \| good	0.809 \| good	3.666 \| good	0.211 \| good
2025-09-05T00:00:00.000Z	34 \| good	6.377 \| good	28.26 \| good	36.932 \| good	0.911 \| good	4.989 \| good	0.223 \| good
2025-09-05T01:00:00.000Z	38 \| good	6.772 \| good	30.015 \| good	33.835 \| good	1.108 \| good	7.5 \| good	0.251 \| good
2025-09-05T02:00:00.000Z	52 \| moderate	10.429 \| good	45.924 \| good	32.294 \| good	1.305 \| good	10.011 \| good	0.279 \| good
2025-09-05T03:00:00.000Z	56 \| moderate	12.446 \| fine	56.422 \| fine	29.28 \| good	1.501 \| good	12.522 \| good	0.308 \| good
2025-09-05T04:00:00.000Z	58 \| moderate	13.278 \| fine	59.938 \| fine	27.748 \| good	1.648 \| good	10.801 \| good	0.296 \| good
2025-09-05T05:00:00.000Z	54 \| moderate	11.394 \| good	50.55 \| good	28.92 \| good	1.795 \| good	9.08 \| good	0.285 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	9.535 \| good	42.446 \| good	28.376 \| good	1.942 \| good	7.359 \| good	0.274 \| good
2025-09-05T07:00:00.000Z	27 \| good	4.738 \| good	20.552 \| good	23.716 \| good	1.65 \| good	6.377 \| good	0.261 \| good
2025-09-05T08:00:00.000Z	22 \| good	3.955 \| good	17.629 \| good	19.974 \| good	1.358 \| good	5.394 \| good	0.247 \| good
2025-09-05T09:00:00.000Z	18 \| good	3.021 \| good	12.176 \| good	19.171 \| good	1.066 \| good	4.412 \| good	0.234 \| good
2025-09-05T10:00:00.000Z	22 \| good	3.523 \| good	15.873 \| good	16.661 \| good	0.878 \| good	4.197 \| good	0.228 \| good
2025-09-05T11:00:00.000Z	44 \| good	7.957 \| good	34.922 \| good	18.167 \| good	0.691 \| good	3.983 \| good	0.222 \| good
2025-09-05T12:00:00.000Z	54 \| moderate	11.158 \| good	49.661 \| good	26.406 \| good	0.504 \| good	3.768 \| good	0.216 \| good
2025-09-05T13:00:00.000Z	54 \| moderate	11.167 \| good	49.749 \| good	30.607 \| good	0.522 \| good	3.338 \| good	0.216 \| good
2025-09-05T14:00:00.000Z	54 \| moderate	10.841 \| good	48.004 \| good	32.313 \| good	0.541 \| good	2.907 \| good	0.216 \| good
2025-09-05T15:00:00.000Z	52 \| moderate	10.119 \| good	44.974 \| good	33.643 \| good	0.56 \| good	2.477 \| good	0.216 \| good
2025-09-05T16:00:00.000Z	38 \| good	6.687 \| good	30.016 \| good	29.162 \| good	0.52 \| good	2.063 \| good	0.203 \| good
2025-09-05T17:00:00.000Z	27 \| good	5.019 \| good	22.015 \| good	28.675 \| good	0.48 \| good	1.648 \| good	0.19 \| good
2025-09-05T18:00:00.000Z	22 \| good	3.807 \| good	16.588 \| good	23.556 \| good	0.44 \| good	1.234 \| good	0.177 \| good
2025-09-05T19:00:00.000Z	25 \| good	4.154 \| good	18.14 \| good	27.077 \| good	0.472 \| good	1.879 \| good	0.181 \| good
2025-09-05T20:00:00.000Z	27 \| good	2.64 \| good	10.832 \| good	29.193 \| good	0.503 \| good	2.525 \| good	0.185 \| good
2025-09-05T21:00:00.000Z	25 \| good	3.527 \| good	15.597 \| good	26.812 \| good	0.535 \| good	3.17 \| good	0.189 \| good
2025-09-05T22:00:00.000Z	27 \| good	5.373 \| good	23.025 \| good	27.841 \| good	0.547 \| good	4.064 \| good	0.198 \| good
2025-09-05T23:00:00.000Z	27 \| good	4.129 \| good	18.292 \| good	29.374 \| good	0.558 \| good	4.958 \| good	0.207 \| good
2025-09-06T00:00:00.000Z	30 \| good	1.644 \| good	6.584 \| good	31.935 \| good	0.569 \| good	5.852 \| good	0.216 \| good
2025-09-06T01:00:00.000Z	28 \| good	2.431 \| good	9.895 \| good	29.738 \| good	0.541 \| good	5.658 \| good	0.214 \| good
2025-09-06T02:00:00.000Z	29 \| good	3.94 \| good	17.555 \| good	30.962 \| good	0.513 \| good	5.464 \| good	0.213 \| good
2025-09-06T03:00:00.000Z	29 \| good	3.037 \| good	12.058 \| good	31.305 \| good	0.485 \| good	5.27 \| good	0.212 \| good
2025-09-06T04:00:00.000Z	27 \| good	2.962 \| good	11.88 \| good	29.383 \| good	0.464 \| good	5.174 \| good	0.211 \| good
2025-09-06T05:00:00.000Z	23 \| good	3.508 \| good	15.742 \| good	25.111 \| good	0.442 \| good	5.078 \| good	0.211 \| good
2025-09-06T06:00:00.000Z	22 \| good	2.88 \| good	11.862 \| good	24.084 \| good	0.421 \| good	4.982 \| good	0.211 \| good
2025-09-06T07:00:00.000Z	22 \| good	3.543 \| good	15.979 \| good	19.852 \| good	0.434 \| good	5.291 \| good	0.211 \| good
2025-09-06T08:00:00.000Z	27 \| good	5.144 \| good	22.073 \| good	15.157 \| good	0.447 \| good	5.6 \| good	0.211 \| good
2025-09-06T09:00:00.000Z	38 \| good	6.718 \| good	29.994 \| good	10.619 \| good	0.46 \| good	5.909 \| good	0.211 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	9.989 \| good	44.273 \| good	13.187 \| good	0.514 \| good	6.581 \| good	0.214 \| good
2025-09-06T11:00:00.000Z	49 \| good	9.002 \| good	39.568 \| good	16.399 \| good	0.569 \| good	7.253 \| good	0.218 \| good
2025-09-06T12:00:00.000Z	49 \| good	8.927 \| good	39.085 \| good	17.962 \| good	0.623 \| good	7.924 \| good	0.222 \| good
2025-09-06T13:00:00.000Z	49 \| good	8.908 \| good	38.988 \| good	25.46 \| good	0.849 \| good	6.569 \| good	0.216 \| good
2025-09-06T14:00:00.000Z	38 \| good	6.69 \| good	29.807 \| good	30.079 \| good	1.075 \| good	5.213 \| good	0.209 \| 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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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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