What is the current concentration of PM10 in Herndon, Virginia?

The current PM10 concentration at Herndon, Virginia is 32.59 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Herndon, Virginia?

The current sulfur dioxide (SO2) concentration at Herndon, Virginia is 0.758 ppb.

What is the current concentration of ozone (O3) in Herndon, Virginia?

The current ozone (O3) concentration at Herndon, Virginia is 4.672 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Herndon, Virginia?

The current nitrogen dioxide (NO2) concentration at Herndon, Virginia is 12.11 ppb.

Herndon, Virginia live air quality index now

Q: What is the current concentration of PM2.5 in Herndon, Virginia?

The current PM2.5 concentration at Herndon, Virginia is 10.164 μg/m3.

Stay updated with real-time air quality in Herndon, Virginia 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

Herndon, Virginia

Last updated: ... (Local time)

Major air pollutants in Herndon, Virginia

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

10.16 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

32.59 μg/m³

155

255

425

605+

Ozone (O₃)

4.67 ppb

201

201+

Sulfur Dioxide (SO₂)

0.76 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

12.11 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.44 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Herndon, Virginia

Get Live Pollen Counts

Herndon, Virginia

Scroll To Air Quality Map

Track live Herndon, Virginia air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T15:00:00.000Z	26 \| good	4.287 \| good	15.118 \| good	27.9 \| good	0.313 \| good	9.397 \| good	0.227 \| good
2025-12-05T16:00:00.000Z	27 \| good	4.935 \| good	15.957 \| good	28.11 \| good	0.27 \| good	9.196 \| good	0.248 \| good
2025-12-05T17:00:00.000Z	49 \| good	9.159 \| good	34.284 \| good	24.452 \| good	0.26 \| good	8.834 \| good	0.227 \| good
2025-12-05T18:00:00.000Z	52 \| moderate	9.977 \| good	53.338 \| good	23.579 \| good	0.399 \| good	7.775 \| good	0.227 \| good
2025-12-05T19:00:00.000Z	38 \| good	7.082 \| good	19.547 \| good	22.656 \| good	0.247 \| good	9.324 \| good	0.243 \| good
2025-12-05T20:00:00.000Z	38 \| good	6.997 \| good	15.621 \| good	23.09 \| good	0.377 \| good	12.167 \| good	0.26 \| good
2025-12-05T21:00:00.000Z	33 \| good	6.091 \| good	14.963 \| good	21.275 \| good	0.36 \| good	15.16 \| good	0.239 \| good
2025-12-05T22:00:00.000Z	38 \| good	6.546 \| good	17.488 \| good	17.618 \| good	0.233 \| good	15.815 \| good	0.239 \| good
2025-12-05T23:00:00.000Z	33 \| good	5.884 \| good	16.052 \| good	18.411 \| good	0.23 \| good	18.941 \| good	0.284 \| good
2025-12-06T00:00:00.000Z	38 \| good	7.39 \| good	22.716 \| good	16.979 \| good	0.284 \| good	17.365 \| good	0.307 \| good
2025-12-06T01:00:00.000Z	49 \| good	8.785 \| good	30.055 \| good	12.957 \| good	0.243 \| good	19.675 \| good	0.291 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	11.38 \| good	40.975 \| good	13.613 \| good	0.352 \| good	22.696 \| good	0.291 \| good
2025-12-06T03:00:00.000Z	58 \| moderate	13.22 \| fine	32.346 \| good	11.872 \| good	0.287 \| good	17.148 \| good	0.291 \| good
2025-12-06T04:00:00.000Z	56 \| moderate	11.991 \| good	43.288 \| good	16.213 \| good	0.277 \| good	13.678 \| good	0.275 \| good
2025-12-06T05:00:00.000Z	69 \| moderate	18.956 \| fine	42.024 \| good	15.953 \| good	0.345 \| good	9.113 \| good	0.268 \| good
2025-12-06T06:00:00.000Z	62 \| moderate	14.629 \| fine	59.92 \| fine	15.03 \| good	0.329 \| good	8.853 \| good	0.227 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.179 \| fine	62.475 \| fine	13.734 \| good	0.363 \| good	12.504 \| good	0.227 \| good
2025-12-06T08:00:00.000Z	64 \| moderate	15.513 \| fine	70.896 \| fine	15.135 \| good	0.296 \| good	18.931 \| good	0.291 \| good
2025-12-06T09:00:00.000Z	62 \| moderate	14.59 \| fine	50.204 \| good	12.528 \| good	0.288 \| good	23.333 \| good	0.275 \| good
2025-12-06T10:00:00.000Z	66 \| moderate	16.51 \| fine	40.189 \| good	12.261 \| good	0.278 \| good	18.383 \| good	0.275 \| good
2025-12-06T11:00:00.000Z	64 \| moderate	16.151 \| fine	31.914 \| good	12.7 \| good	0.264 \| good	16.765 \| good	0.272 \| good
2025-12-06T12:00:00.000Z	67 \| moderate	18.048 \| fine	87.495 \| fine	7.795 \| good	0.206 \| good	17.334 \| good	0.267 \| good
2025-12-06T13:00:00.000Z	58 \| moderate	13.165 \| fine	37.19 \| good	9.433 \| good	0.205 \| good	13.228 \| good	0.287 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.158 \| fine	53.159 \| good	9.753 \| good	0.226 \| good	17.144 \| good	0.367 \| good
2025-12-06T15:00:00.000Z	66 \| moderate	17.11 \| fine	49.696 \| good	12.315 \| good	0.225 \| good	14.582 \| good	0.363 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.892 \| fine	65.291 \| fine	14.141 \| good	0.28 \| good	10.614 \| good	0.327 \| good
2025-12-06T17:00:00.000Z	56 \| moderate	12.43 \| fine	48.009 \| good	14.927 \| good	0.308 \| good	8.819 \| good	0.327 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.836 \| good	50.227 \| good	16.579 \| good	0.471 \| good	7.654 \| good	0.298 \| good
2025-12-06T19:00:00.000Z	49 \| good	8.538 \| good	42.161 \| good	18.91 \| good	0.262 \| good	5.944 \| good	0.236 \| good
2025-12-06T20:00:00.000Z	38 \| good	7.466 \| good	29.064 \| good	16.269 \| good	0.256 \| good	6.744 \| good	0.212 \| good
2025-12-06T21:00:00.000Z	46 \| good	7.488 \| good	50.413 \| good	18.671 \| good	0.269 \| good	7.118 \| good	0.191 \| good
2025-12-06T22:00:00.000Z	51 \| moderate	8.046 \| good	55.175 \| fine	20.096 \| good	0.306 \| good	7.611 \| good	0.215 \| good
2025-12-06T23:00:00.000Z	52 \| moderate	9.567 \| good	48.695 \| good	20.153 \| good	0.207 \| good	6.61 \| good	0.191 \| good
2025-12-07T00:00:00.000Z	57 \| moderate	12.209 \| fine	67.976 \| fine	18.908 \| good	0.357 \| good	13.409 \| good	0.312 \| good
2025-12-07T01:00:00.000Z	56 \| moderate	12.184 \| fine	64.36 \| fine	12.7 \| good	0.409 \| good	13.548 \| good	0.375 \| good
2025-12-07T02:00:00.000Z	68 \| moderate	17.315 \| fine	89.143 \| fine	11.435 \| good	0.531 \| good	14.191 \| good	0.456 \| good
2025-12-07T03:00:00.000Z	66 \| moderate	16.849 \| fine	69.287 \| fine	10.161 \| good	0.292 \| good	17.818 \| good	0.435 \| good
2025-12-07T04:00:00.000Z	69 \| moderate	19.1 \| fine	78.633 \| fine	10.721 \| good	0.516 \| good	14.298 \| good	0.475 \| good
2025-12-07T05:00:00.000Z	64 \| moderate	15.569 \| fine	67.028 \| fine	3.914 \| good	0.442 \| good	14.535 \| good	0.496 \| good
2025-12-07T06:00:00.000Z	65 \| moderate	12.098 \| good	84.095 \| fine	10.576 \| good	0.523 \| good	13.84 \| good	0.473 \| good
2025-12-07T07:00:00.000Z	54 \| moderate	10.851 \| good	37.448 \| good	4.557 \| good	0.524 \| good	13.394 \| good	0.432 \| good
2025-12-07T08:00:00.000Z	52 \| moderate	10.417 \| good	34.106 \| good	9.845 \| good	0.531 \| good	11.185 \| good	0.517 \| good
2025-12-07T09:00:00.000Z	56 \| moderate	12.374 \| fine	49.751 \| good	12.68 \| good	0.598 \| good	11.705 \| good	0.497 \| good
2025-12-07T10:00:00.000Z	58 \| moderate	13.293 \| fine	36.679 \| good	20.413 \| good	0.507 \| good	12.75 \| good	0.453 \| good
2025-12-07T11:00:00.000Z	56 \| moderate	12.177 \| fine	19.15 \| good	10.838 \| good	0.557 \| good	13.587 \| good	0.463 \| good
2025-12-07T12:00:00.000Z	52 \| moderate	10.172 \| good	34.367 \| good	4.8 \| good	0.743 \| good	12.572 \| good	0.461 \| good
2025-12-07T13:00:00.000Z	52 \| moderate	10.164 \| good	32.59 \| good	4.672 \| good	0.758 \| good	12.11 \| good	0.437 \| good
2025-12-07T14:00:00.000Z	54 \| moderate	11.201 \| good	26.015 \| good	2.811 \| good	0.773 \| good	11.809 \| good	0.436 \| good
2025-12-07T14:00:00.000Z	52 \| moderate	10.164 \| good	32.59 \| good	4.672 \| good	0.758 \| good	12.11 \| good	0.437 \| good
2025-12-07T14:00:00.000Z	60 \| moderate	13.792 \| fine	62.536 \| fine	15.647 \| good	5.333 \| good	13.096 \| good	0.258 \| good
2025-12-07T15:00:00.000Z	60 \| moderate	13.679 \| fine	61.319 \| fine	20.498 \| good	5.625 \| good	10.724 \| good	0.254 \| good
2025-12-07T16:00:00.000Z	58 \| moderate	12.922 \| fine	58.108 \| fine	24.434 \| good	5.536 \| good	9.179 \| good	0.235 \| good
2025-12-07T17:00:00.000Z	52 \| moderate	10.152 \| good	44.99 \| good	27.721 \| good	5.448 \| good	7.634 \| good	0.217 \| good
2025-12-07T18:00:00.000Z	44 \| good	7.869 \| good	34.592 \| good	31.37 \| good	5.359 \| good	6.09 \| good	0.198 \| good
2025-12-07T19:00:00.000Z	38 \| good	6.584 \| good	29.26 \| good	32.624 \| good	5.087 \| good	7.953 \| good	0.209 \| good
2025-12-07T20:00:00.000Z	38 \| good	7.073 \| good	31.361 \| good	31.717 \| good	4.816 \| good	9.816 \| good	0.221 \| good
2025-12-07T21:00:00.000Z	49 \| good	9.115 \| good	40.541 \| good	29.511 \| good	4.544 \| good	11.68 \| good	0.233 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	11.351 \| good	50.163 \| good	20.728 \| good	4.692 \| good	16.733 \| good	0.31 \| good
2025-12-07T23:00:00.000Z	62 \| moderate	15.257 \| fine	68.021 \| fine	11.909 \| good	4.84 \| good	21.787 \| good	0.387 \| good
2025-12-08T00:00:00.000Z	58 \| moderate	13.304 \| fine	59.325 \| fine	8.779 \| good	4.988 \| good	26.841 \| good	0.464 \| good
2025-12-08T01:00:00.000Z	60 \| moderate	13.558 \| fine	61.013 \| fine	6.022 \| good	4.866 \| good	26.727 \| good	0.465 \| good
2025-12-08T02:00:00.000Z	62 \| moderate	14.781 \| fine	65.93 \| fine	9.007 \| good	4.745 \| good	26.614 \| good	0.467 \| good
2025-12-08T03:00:00.000Z	56 \| moderate	11.964 \| good	53.399 \| good	13.034 \| good	4.623 \| good	26.501 \| good	0.469 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	9.784 \| good	43.719 \| good	18.556 \| good	4.099 \| good	23.999 \| good	0.428 \| good
2025-12-08T05:00:00.000Z	49 \| good	8.757 \| good	38.726 \| good	24.973 \| good	3.574 \| good	21.498 \| good	0.387 \| good
2025-12-08T06:00:00.000Z	49 \| good	8.954 \| good	39.627 \| good	25.678 \| good	3.05 \| good	18.996 \| good	0.346 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	10.008 \| good	44.373 \| good	26.483 \| good	3.303 \| good	14.685 \| good	0.298 \| good
2025-12-08T08:00:00.000Z	44 \| good	7.591 \| good	33.22 \| good	28.283 \| good	3.557 \| good	10.374 \| good	0.25 \| good
2025-12-08T09:00:00.000Z	27 \| good	2.531 \| good	10.207 \| good	29.362 \| good	3.81 \| good	6.063 \| good	0.201 \| good
2025-12-08T10:00:00.000Z	28 \| good	0.763 \| good	2.829 \| good	30.204 \| good	2.819 \| good	5.276 \| good	0.187 \| good
2025-12-08T11:00:00.000Z	26 \| good	0.677 \| good	2.193 \| good	28.313 \| good	1.827 \| good	4.488 \| good	0.172 \| good
2025-12-08T12:00:00.000Z	24 \| good	1.128 \| good	4.693 \| good	26.007 \| good	0.836 \| good	3.701 \| good	0.157 \| good
2025-12-08T13:00:00.000Z	23 \| good	2.723 \| good	11.116 \| good	25.213 \| good	0.846 \| good	3.41 \| good	0.156 \| good
2025-12-08T14:00:00.000Z	24 \| good	2.888 \| good	11.853 \| good	26.042 \| good	0.857 \| good	3.118 \| good	0.156 \| good
2025-12-08T15:00:00.000Z	24 \| good	1.86 \| good	7.683 \| good	26.111 \| good	0.867 \| good	2.827 \| good	0.155 \| good
2025-12-08T16:00:00.000Z	26 \| good	1.55 \| good	6.455 \| good	28.054 \| good	0.932 \| good	2.628 \| good	0.154 \| good
2025-12-08T17:00:00.000Z	26 \| good	0.663 \| good	2.32 \| good	28.121 \| good	0.997 \| good	2.429 \| good	0.153 \| good
2025-12-08T18:00:00.000Z	26 \| good	0.663 \| good	2.209 \| good	27.502 \| good	1.062 \| good	2.23 \| good	0.151 \| good
2025-12-08T19:00:00.000Z	26 \| good	0.39 \| good	1.51 \| good	27.974 \| good	1.13 \| good	2.865 \| good	0.153 \| good
2025-12-08T20:00:00.000Z	25 \| good	0.502 \| good	1.82 \| good	27.128 \| good	1.199 \| good	3.499 \| good	0.155 \| good
2025-12-08T21:00:00.000Z	23 \| good	0.901 \| good	3.464 \| good	24.541 \| good	1.268 \| good	4.134 \| good	0.156 \| good
2025-12-08T22:00:00.000Z	17 \| good	1.631 \| good	6.546 \| good	17.953 \| good	1.41 \| good	8.69 \| good	0.186 \| good
2025-12-08T23:00:00.000Z	22 \| good	3.976 \| good	17.399 \| good	13.01 \| good	1.552 \| good	13.246 \| good	0.215 \| good
2025-12-09T00:00:00.000Z	22 \| good	4.266 \| good	18.378 \| good	13.803 \| good	1.694 \| good	17.802 \| good	0.245 \| good
2025-12-09T01:00:00.000Z	27 \| good	4.622 \| good	19.978 \| good	14.661 \| good	1.862 \| good	18.308 \| good	0.245 \| good
2025-12-09T02:00:00.000Z	33 \| good	5.521 \| good	23.746 \| good	12.974 \| good	2.029 \| good	18.813 \| good	0.246 \| good
2025-12-09T03:00:00.000Z	33 \| good	5.622 \| good	24.445 \| good	12.846 \| good	2.196 \| good	19.318 \| good	0.247 \| good
2025-12-09T04:00:00.000Z	38 \| good	6.646 \| good	29.565 \| good	9.367 \| good	2.353 \| good	18.555 \| good	0.243 \| good
2025-12-09T05:00:00.000Z	27 \| good	5.467 \| good	23.845 \| good	9.283 \| good	2.51 \| good	17.791 \| good	0.24 \| good
2025-12-09T06:00:00.000Z	58 \| moderate	12.712 \| fine	13.995 \| good	14.883 \| good	2.667 \| good	17.049 \| good	0.236 \| good
2025-12-09T07:00:00.000Z	33 \| good	5.908 \| good	25.947 \| good	8.54 \| good	2.749 \| good	17.122 \| good	0.235 \| good
2025-12-09T08:00:00.000Z	33 \| good	6.324 \| good	28.247 \| good	7.586 \| good	2.832 \| good	17.217 \| good	0.234 \| good
2025-12-09T09:00:00.000Z	38 \| good	6.907 \| good	30.554 \| good	7.181 \| good	2.914 \| good	17.311 \| good	0.233 \| good
2025-12-09T10:00:00.000Z	33 \| good	6.218 \| good	27.267 \| good	7.655 \| good	3.084 \| good	19.27 \| good	0.253 \| good
2025-12-09T11:00:00.000Z	38 \| good	7.136 \| good	31.913 \| good	6.794 \| good	3.253 \| good	21.23 \| good	0.274 \| good
2025-12-09T12:00:00.000Z	75 \| moderate	21.854 \| fine	23.502 \| good	6.526 \| good	3.401 \| good	23.307 \| good	0.295 \| good
2025-12-09T13:00:00.000Z	81 \| moderate	25.081 \| fine	26.781 \| good	13.557 \| good	3.189 \| good	18.465 \| good	0.264 \| good

Herndon

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Herndon, Virginia air quality map: Track AQI near you

0.43ppm

How accurate is Virginia, USA air quality data?

Air quality data and pollutant measurements for Virginia, 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 Herndon, Virginia updated?

The air quality for Herndon, Virginia is updated every hour.

When was the worst air quality at Herndon, Virginia in the last 24 hrs?

The worst air quality in Herndon, Virginia in the last 24 hours was observed at 04:00:00 on 2025-12-07.

When was the best air quality at Herndon, Virginia in the last 24 hrs?

In the last 24 hrs, the best air quality in Herndon, Virginia was observed at 08:00:00 on 2025-12-06.

What is the current air quality in Herndon, Virginia?

The current air quality in Herndon, Virginia is 52, categorized as Moderate based on real-time data.

What pollutant is the most common in Herndon, Virginia?

The most common pollutant in Herndon, Virginia is PM2.5.

What should I do if the air quality in Herndon, Virginia is poor?

If the air quality in Herndon, Virginia is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Herndon, Virginia?

The current PM_2.5 concentration at Herndon, Virginia is 10.164 μg/m³.

What is the current concentration of PM₁₀ in Herndon, Virginia?

The current PM₁₀ concentration at Herndon, Virginia is 32.59 μg/m³.

What is the current concentration of carbon monoxide (CO) in Herndon, Virginia?

The current carbon monoxide (CO) concentration at Herndon, Virginia is 0.437 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Herndon, Virginia?

The current sulfur dioxide (SO₂) concentration at Herndon, Virginia is 0.758 ppb.

What is the current concentration of ozone (O₃) in Herndon, Virginia?

The current ozone (O₃) concentration at Herndon, Virginia is 4.672 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Herndon, Virginia?

The current nitrogen dioxide (NO₂) concentration at Herndon, Virginia is 12.11 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T15:00:00.000Z	26 \| good	4.287 \| good	15.118 \| good	27.9 \| good	0.313 \| good	9.397 \| good	0.227 \| good
2025-12-05T16:00:00.000Z	27 \| good	4.935 \| good	15.957 \| good	28.11 \| good	0.27 \| good	9.196 \| good	0.248 \| good
2025-12-05T17:00:00.000Z	49 \| good	9.159 \| good	34.284 \| good	24.452 \| good	0.26 \| good	8.834 \| good	0.227 \| good
2025-12-05T18:00:00.000Z	52 \| moderate	9.977 \| good	53.338 \| good	23.579 \| good	0.399 \| good	7.775 \| good	0.227 \| good
2025-12-05T19:00:00.000Z	38 \| good	7.082 \| good	19.547 \| good	22.656 \| good	0.247 \| good	9.324 \| good	0.243 \| good
2025-12-05T20:00:00.000Z	38 \| good	6.997 \| good	15.621 \| good	23.09 \| good	0.377 \| good	12.167 \| good	0.26 \| good
2025-12-05T21:00:00.000Z	33 \| good	6.091 \| good	14.963 \| good	21.275 \| good	0.36 \| good	15.16 \| good	0.239 \| good
2025-12-05T22:00:00.000Z	38 \| good	6.546 \| good	17.488 \| good	17.618 \| good	0.233 \| good	15.815 \| good	0.239 \| good
2025-12-05T23:00:00.000Z	33 \| good	5.884 \| good	16.052 \| good	18.411 \| good	0.23 \| good	18.941 \| good	0.284 \| good
2025-12-06T00:00:00.000Z	38 \| good	7.39 \| good	22.716 \| good	16.979 \| good	0.284 \| good	17.365 \| good	0.307 \| good
2025-12-06T01:00:00.000Z	49 \| good	8.785 \| good	30.055 \| good	12.957 \| good	0.243 \| good	19.675 \| good	0.291 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	11.38 \| good	40.975 \| good	13.613 \| good	0.352 \| good	22.696 \| good	0.291 \| good
2025-12-06T03:00:00.000Z	58 \| moderate	13.22 \| fine	32.346 \| good	11.872 \| good	0.287 \| good	17.148 \| good	0.291 \| good
2025-12-06T04:00:00.000Z	56 \| moderate	11.991 \| good	43.288 \| good	16.213 \| good	0.277 \| good	13.678 \| good	0.275 \| good
2025-12-06T05:00:00.000Z	69 \| moderate	18.956 \| fine	42.024 \| good	15.953 \| good	0.345 \| good	9.113 \| good	0.268 \| good
2025-12-06T06:00:00.000Z	62 \| moderate	14.629 \| fine	59.92 \| fine	15.03 \| good	0.329 \| good	8.853 \| good	0.227 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.179 \| fine	62.475 \| fine	13.734 \| good	0.363 \| good	12.504 \| good	0.227 \| good
2025-12-06T08:00:00.000Z	64 \| moderate	15.513 \| fine	70.896 \| fine	15.135 \| good	0.296 \| good	18.931 \| good	0.291 \| good
2025-12-06T09:00:00.000Z	62 \| moderate	14.59 \| fine	50.204 \| good	12.528 \| good	0.288 \| good	23.333 \| good	0.275 \| good
2025-12-06T10:00:00.000Z	66 \| moderate	16.51 \| fine	40.189 \| good	12.261 \| good	0.278 \| good	18.383 \| good	0.275 \| good
2025-12-06T11:00:00.000Z	64 \| moderate	16.151 \| fine	31.914 \| good	12.7 \| good	0.264 \| good	16.765 \| good	0.272 \| good
2025-12-06T12:00:00.000Z	67 \| moderate	18.048 \| fine	87.495 \| fine	7.795 \| good	0.206 \| good	17.334 \| good	0.267 \| good
2025-12-06T13:00:00.000Z	58 \| moderate	13.165 \| fine	37.19 \| good	9.433 \| good	0.205 \| good	13.228 \| good	0.287 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.158 \| fine	53.159 \| good	9.753 \| good	0.226 \| good	17.144 \| good	0.367 \| good
2025-12-06T15:00:00.000Z	66 \| moderate	17.11 \| fine	49.696 \| good	12.315 \| good	0.225 \| good	14.582 \| good	0.363 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.892 \| fine	65.291 \| fine	14.141 \| good	0.28 \| good	10.614 \| good	0.327 \| good
2025-12-06T17:00:00.000Z	56 \| moderate	12.43 \| fine	48.009 \| good	14.927 \| good	0.308 \| good	8.819 \| good	0.327 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.836 \| good	50.227 \| good	16.579 \| good	0.471 \| good	7.654 \| good	0.298 \| good
2025-12-06T19:00:00.000Z	49 \| good	8.538 \| good	42.161 \| good	18.91 \| good	0.262 \| good	5.944 \| good	0.236 \| good
2025-12-06T20:00:00.000Z	38 \| good	7.466 \| good	29.064 \| good	16.269 \| good	0.256 \| good	6.744 \| good	0.212 \| good
2025-12-06T21:00:00.000Z	46 \| good	7.488 \| good	50.413 \| good	18.671 \| good	0.269 \| good	7.118 \| good	0.191 \| good
2025-12-06T22:00:00.000Z	51 \| moderate	8.046 \| good	55.175 \| fine	20.096 \| good	0.306 \| good	7.611 \| good	0.215 \| good
2025-12-06T23:00:00.000Z	52 \| moderate	9.567 \| good	48.695 \| good	20.153 \| good	0.207 \| good	6.61 \| good	0.191 \| good
2025-12-07T00:00:00.000Z	57 \| moderate	12.209 \| fine	67.976 \| fine	18.908 \| good	0.357 \| good	13.409 \| good	0.312 \| good
2025-12-07T01:00:00.000Z	56 \| moderate	12.184 \| fine	64.36 \| fine	12.7 \| good	0.409 \| good	13.548 \| good	0.375 \| good
2025-12-07T02:00:00.000Z	68 \| moderate	17.315 \| fine	89.143 \| fine	11.435 \| good	0.531 \| good	14.191 \| good	0.456 \| good
2025-12-07T03:00:00.000Z	66 \| moderate	16.849 \| fine	69.287 \| fine	10.161 \| good	0.292 \| good	17.818 \| good	0.435 \| good
2025-12-07T04:00:00.000Z	69 \| moderate	19.1 \| fine	78.633 \| fine	10.721 \| good	0.516 \| good	14.298 \| good	0.475 \| good
2025-12-07T05:00:00.000Z	64 \| moderate	15.569 \| fine	67.028 \| fine	3.914 \| good	0.442 \| good	14.535 \| good	0.496 \| good
2025-12-07T06:00:00.000Z	65 \| moderate	12.098 \| good	84.095 \| fine	10.576 \| good	0.523 \| good	13.84 \| good	0.473 \| good
2025-12-07T07:00:00.000Z	54 \| moderate	10.851 \| good	37.448 \| good	4.557 \| good	0.524 \| good	13.394 \| good	0.432 \| good
2025-12-07T08:00:00.000Z	52 \| moderate	10.417 \| good	34.106 \| good	9.845 \| good	0.531 \| good	11.185 \| good	0.517 \| good
2025-12-07T09:00:00.000Z	56 \| moderate	12.374 \| fine	49.751 \| good	12.68 \| good	0.598 \| good	11.705 \| good	0.497 \| good
2025-12-07T10:00:00.000Z	58 \| moderate	13.293 \| fine	36.679 \| good	20.413 \| good	0.507 \| good	12.75 \| good	0.453 \| good
2025-12-07T11:00:00.000Z	56 \| moderate	12.177 \| fine	19.15 \| good	10.838 \| good	0.557 \| good	13.587 \| good	0.463 \| good
2025-12-07T12:00:00.000Z	52 \| moderate	10.172 \| good	34.367 \| good	4.8 \| good	0.743 \| good	12.572 \| good	0.461 \| good
2025-12-07T13:00:00.000Z	52 \| moderate	10.164 \| good	32.59 \| good	4.672 \| good	0.758 \| good	12.11 \| good	0.437 \| good
2025-12-07T14:00:00.000Z	54 \| moderate	11.201 \| good	26.015 \| good	2.811 \| good	0.773 \| good	11.809 \| good	0.436 \| good
2025-12-07T14:00:00.000Z	52 \| moderate	10.164 \| good	32.59 \| good	4.672 \| good	0.758 \| good	12.11 \| good	0.437 \| good
2025-12-07T14:00:00.000Z	60 \| moderate	13.792 \| fine	62.536 \| fine	15.647 \| good	5.333 \| good	13.096 \| good	0.258 \| good
2025-12-07T15:00:00.000Z	60 \| moderate	13.679 \| fine	61.319 \| fine	20.498 \| good	5.625 \| good	10.724 \| good	0.254 \| good
2025-12-07T16:00:00.000Z	58 \| moderate	12.922 \| fine	58.108 \| fine	24.434 \| good	5.536 \| good	9.179 \| good	0.235 \| good
2025-12-07T17:00:00.000Z	52 \| moderate	10.152 \| good	44.99 \| good	27.721 \| good	5.448 \| good	7.634 \| good	0.217 \| good
2025-12-07T18:00:00.000Z	44 \| good	7.869 \| good	34.592 \| good	31.37 \| good	5.359 \| good	6.09 \| good	0.198 \| good
2025-12-07T19:00:00.000Z	38 \| good	6.584 \| good	29.26 \| good	32.624 \| good	5.087 \| good	7.953 \| good	0.209 \| good
2025-12-07T20:00:00.000Z	38 \| good	7.073 \| good	31.361 \| good	31.717 \| good	4.816 \| good	9.816 \| good	0.221 \| good
2025-12-07T21:00:00.000Z	49 \| good	9.115 \| good	40.541 \| good	29.511 \| good	4.544 \| good	11.68 \| good	0.233 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	11.351 \| good	50.163 \| good	20.728 \| good	4.692 \| good	16.733 \| good	0.31 \| good
2025-12-07T23:00:00.000Z	62 \| moderate	15.257 \| fine	68.021 \| fine	11.909 \| good	4.84 \| good	21.787 \| good	0.387 \| good
2025-12-08T00:00:00.000Z	58 \| moderate	13.304 \| fine	59.325 \| fine	8.779 \| good	4.988 \| good	26.841 \| good	0.464 \| good
2025-12-08T01:00:00.000Z	60 \| moderate	13.558 \| fine	61.013 \| fine	6.022 \| good	4.866 \| good	26.727 \| good	0.465 \| good
2025-12-08T02:00:00.000Z	62 \| moderate	14.781 \| fine	65.93 \| fine	9.007 \| good	4.745 \| good	26.614 \| good	0.467 \| good
2025-12-08T03:00:00.000Z	56 \| moderate	11.964 \| good	53.399 \| good	13.034 \| good	4.623 \| good	26.501 \| good	0.469 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	9.784 \| good	43.719 \| good	18.556 \| good	4.099 \| good	23.999 \| good	0.428 \| good
2025-12-08T05:00:00.000Z	49 \| good	8.757 \| good	38.726 \| good	24.973 \| good	3.574 \| good	21.498 \| good	0.387 \| good
2025-12-08T06:00:00.000Z	49 \| good	8.954 \| good	39.627 \| good	25.678 \| good	3.05 \| good	18.996 \| good	0.346 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	10.008 \| good	44.373 \| good	26.483 \| good	3.303 \| good	14.685 \| good	0.298 \| good
2025-12-08T08:00:00.000Z	44 \| good	7.591 \| good	33.22 \| good	28.283 \| good	3.557 \| good	10.374 \| good	0.25 \| good
2025-12-08T09:00:00.000Z	27 \| good	2.531 \| good	10.207 \| good	29.362 \| good	3.81 \| good	6.063 \| good	0.201 \| good
2025-12-08T10:00:00.000Z	28 \| good	0.763 \| good	2.829 \| good	30.204 \| good	2.819 \| good	5.276 \| good	0.187 \| good
2025-12-08T11:00:00.000Z	26 \| good	0.677 \| good	2.193 \| good	28.313 \| good	1.827 \| good	4.488 \| good	0.172 \| good
2025-12-08T12:00:00.000Z	24 \| good	1.128 \| good	4.693 \| good	26.007 \| good	0.836 \| good	3.701 \| good	0.157 \| good
2025-12-08T13:00:00.000Z	23 \| good	2.723 \| good	11.116 \| good	25.213 \| good	0.846 \| good	3.41 \| good	0.156 \| good
2025-12-08T14:00:00.000Z	24 \| good	2.888 \| good	11.853 \| good	26.042 \| good	0.857 \| good	3.118 \| good	0.156 \| good
2025-12-08T15:00:00.000Z	24 \| good	1.86 \| good	7.683 \| good	26.111 \| good	0.867 \| good	2.827 \| good	0.155 \| good
2025-12-08T16:00:00.000Z	26 \| good	1.55 \| good	6.455 \| good	28.054 \| good	0.932 \| good	2.628 \| good	0.154 \| good
2025-12-08T17:00:00.000Z	26 \| good	0.663 \| good	2.32 \| good	28.121 \| good	0.997 \| good	2.429 \| good	0.153 \| good
2025-12-08T18:00:00.000Z	26 \| good	0.663 \| good	2.209 \| good	27.502 \| good	1.062 \| good	2.23 \| good	0.151 \| good
2025-12-08T19:00:00.000Z	26 \| good	0.39 \| good	1.51 \| good	27.974 \| good	1.13 \| good	2.865 \| good	0.153 \| good
2025-12-08T20:00:00.000Z	25 \| good	0.502 \| good	1.82 \| good	27.128 \| good	1.199 \| good	3.499 \| good	0.155 \| good
2025-12-08T21:00:00.000Z	23 \| good	0.901 \| good	3.464 \| good	24.541 \| good	1.268 \| good	4.134 \| good	0.156 \| good
2025-12-08T22:00:00.000Z	17 \| good	1.631 \| good	6.546 \| good	17.953 \| good	1.41 \| good	8.69 \| good	0.186 \| good
2025-12-08T23:00:00.000Z	22 \| good	3.976 \| good	17.399 \| good	13.01 \| good	1.552 \| good	13.246 \| good	0.215 \| good
2025-12-09T00:00:00.000Z	22 \| good	4.266 \| good	18.378 \| good	13.803 \| good	1.694 \| good	17.802 \| good	0.245 \| good
2025-12-09T01:00:00.000Z	27 \| good	4.622 \| good	19.978 \| good	14.661 \| good	1.862 \| good	18.308 \| good	0.245 \| good
2025-12-09T02:00:00.000Z	33 \| good	5.521 \| good	23.746 \| good	12.974 \| good	2.029 \| good	18.813 \| good	0.246 \| good
2025-12-09T03:00:00.000Z	33 \| good	5.622 \| good	24.445 \| good	12.846 \| good	2.196 \| good	19.318 \| good	0.247 \| good
2025-12-09T04:00:00.000Z	38 \| good	6.646 \| good	29.565 \| good	9.367 \| good	2.353 \| good	18.555 \| good	0.243 \| good
2025-12-09T05:00:00.000Z	27 \| good	5.467 \| good	23.845 \| good	9.283 \| good	2.51 \| good	17.791 \| good	0.24 \| good
2025-12-09T06:00:00.000Z	58 \| moderate	12.712 \| fine	13.995 \| good	14.883 \| good	2.667 \| good	17.049 \| good	0.236 \| good
2025-12-09T07:00:00.000Z	33 \| good	5.908 \| good	25.947 \| good	8.54 \| good	2.749 \| good	17.122 \| good	0.235 \| good
2025-12-09T08:00:00.000Z	33 \| good	6.324 \| good	28.247 \| good	7.586 \| good	2.832 \| good	17.217 \| good	0.234 \| good
2025-12-09T09:00:00.000Z	38 \| good	6.907 \| good	30.554 \| good	7.181 \| good	2.914 \| good	17.311 \| good	0.233 \| good
2025-12-09T10:00:00.000Z	33 \| good	6.218 \| good	27.267 \| good	7.655 \| good	3.084 \| good	19.27 \| good	0.253 \| good
2025-12-09T11:00:00.000Z	38 \| good	7.136 \| good	31.913 \| good	6.794 \| good	3.253 \| good	21.23 \| good	0.274 \| good
2025-12-09T12:00:00.000Z	75 \| moderate	21.854 \| fine	23.502 \| good	6.526 \| good	3.401 \| good	23.307 \| good	0.295 \| good
2025-12-09T13:00:00.000Z	81 \| moderate	25.081 \| fine	26.781 \| good	13.557 \| good	3.189 \| good	18.465 \| good	0.264 \| good

Herndon, Virginia live air quality index now

Major air pollutants in Herndon, Virginia

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Herndon, Virginia air quality map: Track AQI near you

Air quality in nearby cities

Reston, Virginia

McNair, Virginia

Dranesville, Virginia

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Sugarland Run, Virginia

Franklin Farm, Virginia

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Frequently asked questions

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What is the current air quality in Herndon, Virginia?

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What is the current concentration of PM2.5 in Herndon, Virginia?

What is the current concentration of PM10 in Herndon, Virginia?

What is the current concentration of carbon monoxide (CO) in Herndon, Virginia?

What is the current concentration of sulfur dioxide (SO2) in Herndon, Virginia?

What is the current concentration of ozone (O3) in Herndon, Virginia?

What is the current concentration of nitrogen dioxide (NO2) in Herndon, Virginia?

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 Herndon, Virginia?

What is the current concentration of PM₁₀ in Herndon, Virginia?

What is the current concentration of sulfur dioxide (SO₂) in Herndon, Virginia?

What is the current concentration of ozone (O₃) in Herndon, Virginia?

What is the current concentration of nitrogen dioxide (NO₂) in Herndon, Virginia?