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

The current PM10 concentration at Herndon, Virginia is 36.598 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Herndon, Virginia is 0.585 ppb.

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

The current ozone (O3) concentration at Herndon, Virginia is 3.758 ppm.

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

The current nitrogen dioxide (NO2) concentration at Herndon, Virginia is 27.226 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 9.348 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)

Good

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)

9.35 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

36.60 μg/m³

155

255

425

605+

Ozone (O₃)

3.76 ppb

201

201+

Sulfur Dioxide (SO₂)

0.58 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

27.23 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.53 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
2025-12-11T15:00:00.000Z	27 \| good	2.284 \| good	7.116 \| good	28.917 \| good	0.328 \| good	3.302 \| good	0.123 \| good
2025-12-11T16:00:00.000Z	29 \| good	2.41 \| good	7.046 \| good	30.946 \| good	0.348 \| good	2.798 \| good	0.123 \| good
2025-12-11T17:00:00.000Z	30 \| good	2.547 \| good	8.222 \| good	32.29 \| good	0.274 \| good	2.126 \| good	0.123 \| good
2025-12-11T18:00:00.000Z	30 \| good	2.553 \| good	7.771 \| good	32.064 \| good	0.298 \| good	1.496 \| good	0.123 \| good
2025-12-11T19:00:00.000Z	31 \| good	2.556 \| good	7.967 \| good	32.727 \| good	0.336 \| good	1.745 \| good	0.123 \| good
2025-12-11T20:00:00.000Z	31 \| good	2.646 \| good	7.978 \| good	33.269 \| good	0.327 \| good	1.92 \| good	0.123 \| good
2025-12-11T21:00:00.000Z	32 \| good	2.496 \| good	8.547 \| good	34.794 \| good	0.414 \| good	2.105 \| good	0.123 \| good
2025-12-11T22:00:00.000Z	32 \| good	2.457 \| good	7.99 \| good	34.992 \| good	0.483 \| good	2.026 \| good	0.123 \| good
2025-12-11T23:00:00.000Z	31 \| good	2.312 \| good	6.999 \| good	34.268 \| good	0.269 \| good	2.871 \| good	0.123 \| good
2025-12-12T00:00:00.000Z	31 \| good	2.526 \| good	6.691 \| good	33.762 \| good	0.31 \| good	3.003 \| good	0.143 \| good
2025-12-12T01:00:00.000Z	30 \| good	2.541 \| good	6.736 \| good	32.159 \| good	0.748 \| good	2.828 \| good	0.143 \| good
2025-12-12T02:00:00.000Z	31 \| good	2.711 \| good	6.718 \| good	32.522 \| good	0.803 \| good	2.716 \| good	0.143 \| good
2025-12-12T03:00:00.000Z	52 \| moderate	9.961 \| good	44.631 \| good	12.703 \| good	2.616 \| good	9.835 \| good	0.169 \| good
2025-12-12T04:00:00.000Z	28 \| good	3.152 \| good	7.077 \| good	29.605 \| good	0.907 \| good	3.403 \| good	0.143 \| good
2025-12-12T05:00:00.000Z	26 \| good	3.483 \| good	7.458 \| good	28.402 \| good	0.838 \| good	2.361 \| good	0.143 \| good
2025-12-12T06:00:00.000Z	27 \| good	3.596 \| good	7.974 \| good	29.462 \| good	0.484 \| good	2.305 \| good	0.143 \| good
2025-12-12T07:00:00.000Z	26 \| good	3.772 \| good	7.841 \| good	28.408 \| good	0.36 \| good	2.099 \| good	0.166 \| good
2025-12-12T08:00:00.000Z	27 \| good	3.9 \| good	8.045 \| good	28.537 \| good	0.341 \| good	2.392 \| good	0.166 \| good
2025-12-12T09:00:00.000Z	27 \| good	4.054 \| good	8.032 \| good	29.361 \| good	0.353 \| good	3.476 \| good	0.166 \| good
2025-12-12T10:00:00.000Z	25 \| good	4.231 \| good	8.252 \| good	26.977 \| good	0.441 \| good	5.012 \| good	0.166 \| good
2025-12-12T11:00:00.000Z	25 \| good	4.098 \| good	8.868 \| good	27.018 \| good	0.283 \| good	5.061 \| good	0.182 \| good
2025-12-12T12:00:00.000Z	25 \| good	4.391 \| good	9.328 \| good	26.92 \| good	0.322 \| good	4.544 \| good	0.182 \| good
2025-12-12T13:00:00.000Z	23 \| good	4.464 \| good	9.44 \| good	25.091 \| good	0.331 \| good	6.872 \| good	0.183 \| good
2025-12-12T14:00:00.000Z	27 \| good	4.697 \| good	10.073 \| good	24.969 \| good	0.38 \| good	8.469 \| good	0.19 \| good
2025-12-12T15:00:00.000Z	27 \| good	4.706 \| good	11.451 \| good	24.851 \| good	0.378 \| good	8.176 \| good	0.19 \| good
2025-12-12T16:00:00.000Z	27 \| good	4.586 \| good	12.42 \| good	27.013 \| good	0.615 \| good	5.631 \| good	0.167 \| good
2025-12-12T17:00:00.000Z	27 \| good	4.692 \| good	12.799 \| good	28.404 \| good	0.421 \| good	3.654 \| good	0.143 \| good
2025-12-12T18:00:00.000Z	27 \| good	4.714 \| good	11.664 \| good	28.505 \| good	0.392 \| good	2.551 \| good	0.143 \| good
2025-12-12T19:00:00.000Z	27 \| good	5.103 \| good	10.889 \| good	28.1 \| good	0.445 \| good	2.612 \| good	0.143 \| good
2025-12-12T20:00:00.000Z	27 \| good	5.161 \| good	11.142 \| good	27.737 \| good	0.554 \| good	3.177 \| good	0.143 \| good
2025-12-12T21:00:00.000Z	27 \| good	5.096 \| good	11.224 \| good	28.318 \| good	0.467 \| good	3.128 \| good	0.166 \| good
2025-12-12T22:00:00.000Z	27 \| good	5.229 \| good	12.035 \| good	27.81 \| good	0.48 \| good	3.295 \| good	0.166 \| good
2025-12-12T23:00:00.000Z	33 \| good	5.666 \| good	13.155 \| good	25.299 \| good	0.658 \| good	5.747 \| good	0.206 \| good
2025-12-13T00:00:00.000Z	33 \| good	5.742 \| good	14.538 \| good	20.634 \| good	0.593 \| good	12.854 \| good	0.266 \| good
2025-12-13T01:00:00.000Z	33 \| good	6.173 \| good	16.072 \| good	16.725 \| good	0.707 \| good	18.462 \| good	0.337 \| good
2025-12-13T02:00:00.000Z	44 \| good	7.508 \| good	21.233 \| good	9.17 \| good	0.778 \| good	26.008 \| good	0.586 \| good
2025-12-13T03:00:00.000Z	62 \| moderate	14.827 \| fine	66.739 \| fine	3.709 \| good	4.019 \| good	27.641 \| good	0.458 \| good
2025-12-13T04:00:00.000Z	56 \| moderate	11.716 \| good	28.395 \| good	4.454 \| good	0.674 \| good	29.003 \| good	0.621 \| good
2025-12-13T05:00:00.000Z	56 \| moderate	12.427 \| fine	29.845 \| good	2.458 \| good	0.639 \| good	27.431 \| good	0.752 \| good
2025-12-13T06:00:00.000Z	60 \| moderate	14.467 \| fine	32.122 \| good	2.804 \| good	0.826 \| good	26.245 \| good	0.688 \| good
2025-12-13T07:00:00.000Z	64 \| moderate	16.086 \| fine	35.434 \| good	2.667 \| good	0.79 \| good	25.924 \| good	0.71 \| good
2025-12-13T08:00:00.000Z	62 \| moderate	14.991 \| fine	31.808 \| good	2.629 \| good	0.744 \| good	25.5 \| good	0.752 \| good
2025-12-13T09:00:00.000Z	58 \| moderate	12.807 \| fine	26.727 \| good	2.63 \| good	0.624 \| good	24.816 \| good	0.661 \| good
2025-12-13T10:00:00.000Z	54 \| moderate	11.443 \| good	23.6 \| good	8.388 \| good	0.596 \| good	24.078 \| good	0.6 \| good
2025-12-13T11:00:00.000Z	54 \| moderate	11.006 \| good	20.947 \| good	3.728 \| good	0.553 \| good	24.186 \| good	0.559 \| good
2025-12-13T12:00:00.000Z	52 \| moderate	10.176 \| good	21.995 \| good	4.91 \| good	0.542 \| good	20.706 \| good	0.53 \| good
2025-12-13T13:00:00.000Z	52 \| moderate	10.257 \| good	19.416 \| good	4.97 \| good	0.595 \| good	20.786 \| good	0.487 \| good
2025-12-13T14:00:00.000Z	52 \| moderate	9.617 \| good	20.557 \| good	4.385 \| good	0.566 \| good	22.748 \| good	0.534 \| good
2025-12-13T14:00:00.000Z	49 \| good	9.348 \| good	36.598 \| good	3.758 \| good	0.585 \| good	27.226 \| good	0.533 \| good
2025-12-13T15:00:00.000Z	54 \| moderate	11.49 \| good	50.79 \| good	16.513 \| good	3.194 \| good	8.407 \| good	0.211 \| good
2025-12-13T16:00:00.000Z	56 \| moderate	11.591 \| good	51.296 \| good	16.639 \| good	3.154 \| good	7.199 \| good	0.205 \| good
2025-12-13T17:00:00.000Z	56 \| moderate	12.391 \| fine	55.517 \| fine	16.824 \| good	3.114 \| good	5.992 \| good	0.199 \| good
2025-12-13T18:00:00.000Z	56 \| moderate	11.7 \| good	51.56 \| good	19.778 \| good	3.074 \| good	4.784 \| good	0.193 \| good
2025-12-13T19:00:00.000Z	54 \| moderate	11.185 \| good	49.596 \| good	20.596 \| good	2.942 \| good	6.909 \| good	0.204 \| good
2025-12-13T20:00:00.000Z	56 \| moderate	12.226 \| fine	55.019 \| fine	17.554 \| good	2.811 \| good	9.033 \| good	0.216 \| good
2025-12-13T21:00:00.000Z	56 \| moderate	11.89 \| good	53.287 \| good	16.849 \| good	2.679 \| good	11.158 \| good	0.228 \| good
2025-12-13T22:00:00.000Z	52 \| moderate	10.158 \| good	44.914 \| good	13.787 \| good	3.038 \| good	13.905 \| good	0.299 \| good
2025-12-13T23:00:00.000Z	54 \| moderate	10.889 \| good	48.033 \| good	10.449 \| good	3.397 \| good	16.651 \| good	0.37 \| good
2025-12-14T00:00:00.000Z	62 \| moderate	14.701 \| fine	65.65 \| fine	6.15 \| good	3.756 \| good	19.398 \| good	0.441 \| good
2025-12-14T01:00:00.000Z	66 \| moderate	17.232 \| fine	76.054 \| fine	4.152 \| good	3.791 \| good	19.692 \| good	0.415 \| good
2025-12-14T02:00:00.000Z	67 \| moderate	17.863 \| fine	78.789 \| fine	5.78 \| good	3.827 \| good	19.985 \| good	0.389 \| good
2025-12-14T03:00:00.000Z	71 \| moderate	20.248 \| fine	89.144 \| fine	11.072 \| good	3.862 \| good	20.278 \| good	0.362 \| good
2025-12-14T04:00:00.000Z	62 \| moderate	15.413 \| fine	68.903 \| fine	14.161 \| good	3.737 \| good	20.103 \| good	0.331 \| good
2025-12-14T05:00:00.000Z	54 \| moderate	10.557 \| good	46.69 \| good	21.841 \| good	3.612 \| good	19.927 \| good	0.299 \| good
2025-12-14T06:00:00.000Z	54 \| moderate	10.572 \| good	46.716 \| good	20.99 \| good	3.487 \| good	19.752 \| good	0.267 \| good
2025-12-14T07:00:00.000Z	56 \| moderate	12.142 \| fine	54.618 \| good	23.575 \| good	3.456 \| good	15.865 \| good	0.241 \| good
2025-12-14T08:00:00.000Z	62 \| moderate	14.913 \| fine	66.794 \| fine	19.937 \| good	3.426 \| good	11.979 \| good	0.215 \| good
2025-12-14T09:00:00.000Z	52 \| moderate	10.149 \| good	45.197 \| good	21.74 \| good	3.395 \| good	8.092 \| good	0.189 \| good
2025-12-14T10:00:00.000Z	33 \| good	5.796 \| good	25.509 \| good	26.06 \| good	3.157 \| good	7.391 \| good	0.193 \| good
2025-12-14T11:00:00.000Z	25 \| good	4.038 \| good	17.717 \| good	27.419 \| good	2.919 \| good	6.689 \| good	0.198 \| good
2025-12-14T12:00:00.000Z	26 \| good	2.861 \| good	11.681 \| good	27.889 \| good	2.681 \| good	5.987 \| good	0.203 \| good
2025-12-14T13:00:00.000Z	28 \| good	1.775 \| good	7.29 \| good	29.849 \| good	2.443 \| good	4.96 \| good	0.191 \| good
2025-12-14T14:00:00.000Z	30 \| good	1.599 \| good	6.379 \| good	31.536 \| good	2.206 \| good	3.932 \| good	0.179 \| good
2025-12-14T15:00:00.000Z	29 \| good	2.491 \| good	10.128 \| good	30.759 \| good	1.968 \| good	2.905 \| good	0.168 \| good
2025-12-14T16:00:00.000Z	29 \| good	2.735 \| good	10.993 \| good	31.468 \| good	1.88 \| good	2.672 \| good	0.163 \| good
2025-12-14T17:00:00.000Z	30 \| good	2.819 \| good	11.575 \| good	31.847 \| good	1.792 \| good	2.44 \| good	0.158 \| good
2025-12-14T18:00:00.000Z	28 \| good	3.23 \| good	14.005 \| good	29.63 \| good	1.704 \| good	2.207 \| good	0.153 \| good
2025-12-14T19:00:00.000Z	26 \| good	3.33 \| good	14.519 \| good	28.092 \| good	1.669 \| good	2.639 \| good	0.155 \| good
2025-12-14T20:00:00.000Z	24 \| good	2.92 \| good	12.28 \| good	25.974 \| good	1.635 \| good	3.071 \| good	0.157 \| good
2025-12-14T21:00:00.000Z	22 \| good	2.795 \| good	11.249 \| good	24.227 \| good	1.6 \| good	3.502 \| good	0.159 \| good
2025-12-14T22:00:00.000Z	21 \| good	1.763 \| good	7.208 \| good	22.847 \| good	1.532 \| good	3.807 \| good	0.158 \| good
2025-12-14T23:00:00.000Z	20 \| good	1.139 \| good	4.575 \| good	21.844 \| good	1.464 \| good	4.111 \| good	0.158 \| good
2025-12-15T00:00:00.000Z	23 \| good	1.405 \| good	5.418 \| good	24.67 \| good	1.396 \| good	4.415 \| good	0.157 \| good
2025-12-15T01:00:00.000Z	24 \| good	1.573 \| good	6.345 \| good	26.205 \| good	1.451 \| good	4.341 \| good	0.157 \| good
2025-12-15T02:00:00.000Z	25 \| good	1.534 \| good	6.062 \| good	26.9 \| good	1.506 \| good	4.267 \| good	0.156 \| good
2025-12-15T03:00:00.000Z	26 \| good	1.515 \| good	6.293 \| good	27.866 \| good	1.561 \| good	4.193 \| good	0.156 \| good
2025-12-15T04:00:00.000Z	25 \| good	1.472 \| good	5.832 \| good	26.987 \| good	1.506 \| good	3.875 \| good	0.156 \| good
2025-12-15T05:00:00.000Z	24 \| good	1.585 \| good	6.388 \| good	25.95 \| good	1.452 \| good	3.557 \| good	0.155 \| good
2025-12-15T06:00:00.000Z	24 \| good	1.663 \| good	7.036 \| good	25.888 \| good	1.398 \| good	3.239 \| good	0.155 \| good
2025-12-15T07:00:00.000Z	23 \| good	2.736 \| good	11.097 \| good	25.051 \| good	1.383 \| good	3.052 \| good	0.153 \| good
2025-12-15T08:00:00.000Z	24 \| good	3.744 \| good	16.385 \| good	25.774 \| good	1.369 \| good	2.865 \| good	0.15 \| good
2025-12-15T09:00:00.000Z	26 \| good	4.484 \| good	19.594 \| good	27.757 \| good	1.354 \| good	2.678 \| good	0.148 \| good
2025-12-15T10:00:00.000Z	25 \| good	3.559 \| good	15.626 \| good	27.441 \| good	1.405 \| good	3.218 \| good	0.151 \| good
2025-12-15T11:00:00.000Z	24 \| good	2.114 \| good	8.617 \| good	26.257 \| good	1.455 \| good	3.759 \| good	0.154 \| good
2025-12-15T12:00:00.000Z	23 \| good	2.011 \| good	8.094 \| good	25.027 \| good	1.506 \| good	4.3 \| good	0.156 \| good
2025-12-15T13:00:00.000Z	22 \| good	3.404 \| good	15.094 \| good	23.715 \| good	1.673 \| good	3.866 \| good	0.158 \| good
2025-12-15T14:00:00.000Z	23 \| good	4.303 \| good	18.926 \| good	25.436 \| good	1.84 \| good	3.433 \| good	0.16 \| good

Herndon

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Herndon, Virginia air quality map: Track AQI near you

0.49ppm

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 07:00:00 on 2025-12-13.

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 10:00:00 on 2025-12-12.

What is the current air quality in Herndon, Virginia?

The current air quality in Herndon, Virginia is 49, categorized as Good 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 9.348 μg/m³.

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

The current PM₁₀ concentration at Herndon, Virginia is 36.598 μg/m³.

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

The current carbon monoxide (CO) concentration at Herndon, Virginia is 0.533 ppm.

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

The current sulfur dioxide (SO₂) concentration at Herndon, Virginia is 0.585 ppb.

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

The current ozone (O₃) concentration at Herndon, Virginia is 3.758 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Herndon, Virginia is 27.226 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-11T15:00:00.000Z	27 \| good	2.284 \| good	7.116 \| good	28.917 \| good	0.328 \| good	3.302 \| good	0.123 \| good
2025-12-11T16:00:00.000Z	29 \| good	2.41 \| good	7.046 \| good	30.946 \| good	0.348 \| good	2.798 \| good	0.123 \| good
2025-12-11T17:00:00.000Z	30 \| good	2.547 \| good	8.222 \| good	32.29 \| good	0.274 \| good	2.126 \| good	0.123 \| good
2025-12-11T18:00:00.000Z	30 \| good	2.553 \| good	7.771 \| good	32.064 \| good	0.298 \| good	1.496 \| good	0.123 \| good
2025-12-11T19:00:00.000Z	31 \| good	2.556 \| good	7.967 \| good	32.727 \| good	0.336 \| good	1.745 \| good	0.123 \| good
2025-12-11T20:00:00.000Z	31 \| good	2.646 \| good	7.978 \| good	33.269 \| good	0.327 \| good	1.92 \| good	0.123 \| good
2025-12-11T21:00:00.000Z	32 \| good	2.496 \| good	8.547 \| good	34.794 \| good	0.414 \| good	2.105 \| good	0.123 \| good
2025-12-11T22:00:00.000Z	32 \| good	2.457 \| good	7.99 \| good	34.992 \| good	0.483 \| good	2.026 \| good	0.123 \| good
2025-12-11T23:00:00.000Z	31 \| good	2.312 \| good	6.999 \| good	34.268 \| good	0.269 \| good	2.871 \| good	0.123 \| good
2025-12-12T00:00:00.000Z	31 \| good	2.526 \| good	6.691 \| good	33.762 \| good	0.31 \| good	3.003 \| good	0.143 \| good
2025-12-12T01:00:00.000Z	30 \| good	2.541 \| good	6.736 \| good	32.159 \| good	0.748 \| good	2.828 \| good	0.143 \| good
2025-12-12T02:00:00.000Z	31 \| good	2.711 \| good	6.718 \| good	32.522 \| good	0.803 \| good	2.716 \| good	0.143 \| good
2025-12-12T03:00:00.000Z	52 \| moderate	9.961 \| good	44.631 \| good	12.703 \| good	2.616 \| good	9.835 \| good	0.169 \| good
2025-12-12T04:00:00.000Z	28 \| good	3.152 \| good	7.077 \| good	29.605 \| good	0.907 \| good	3.403 \| good	0.143 \| good
2025-12-12T05:00:00.000Z	26 \| good	3.483 \| good	7.458 \| good	28.402 \| good	0.838 \| good	2.361 \| good	0.143 \| good
2025-12-12T06:00:00.000Z	27 \| good	3.596 \| good	7.974 \| good	29.462 \| good	0.484 \| good	2.305 \| good	0.143 \| good
2025-12-12T07:00:00.000Z	26 \| good	3.772 \| good	7.841 \| good	28.408 \| good	0.36 \| good	2.099 \| good	0.166 \| good
2025-12-12T08:00:00.000Z	27 \| good	3.9 \| good	8.045 \| good	28.537 \| good	0.341 \| good	2.392 \| good	0.166 \| good
2025-12-12T09:00:00.000Z	27 \| good	4.054 \| good	8.032 \| good	29.361 \| good	0.353 \| good	3.476 \| good	0.166 \| good
2025-12-12T10:00:00.000Z	25 \| good	4.231 \| good	8.252 \| good	26.977 \| good	0.441 \| good	5.012 \| good	0.166 \| good
2025-12-12T11:00:00.000Z	25 \| good	4.098 \| good	8.868 \| good	27.018 \| good	0.283 \| good	5.061 \| good	0.182 \| good
2025-12-12T12:00:00.000Z	25 \| good	4.391 \| good	9.328 \| good	26.92 \| good	0.322 \| good	4.544 \| good	0.182 \| good
2025-12-12T13:00:00.000Z	23 \| good	4.464 \| good	9.44 \| good	25.091 \| good	0.331 \| good	6.872 \| good	0.183 \| good
2025-12-12T14:00:00.000Z	27 \| good	4.697 \| good	10.073 \| good	24.969 \| good	0.38 \| good	8.469 \| good	0.19 \| good
2025-12-12T15:00:00.000Z	27 \| good	4.706 \| good	11.451 \| good	24.851 \| good	0.378 \| good	8.176 \| good	0.19 \| good
2025-12-12T16:00:00.000Z	27 \| good	4.586 \| good	12.42 \| good	27.013 \| good	0.615 \| good	5.631 \| good	0.167 \| good
2025-12-12T17:00:00.000Z	27 \| good	4.692 \| good	12.799 \| good	28.404 \| good	0.421 \| good	3.654 \| good	0.143 \| good
2025-12-12T18:00:00.000Z	27 \| good	4.714 \| good	11.664 \| good	28.505 \| good	0.392 \| good	2.551 \| good	0.143 \| good
2025-12-12T19:00:00.000Z	27 \| good	5.103 \| good	10.889 \| good	28.1 \| good	0.445 \| good	2.612 \| good	0.143 \| good
2025-12-12T20:00:00.000Z	27 \| good	5.161 \| good	11.142 \| good	27.737 \| good	0.554 \| good	3.177 \| good	0.143 \| good
2025-12-12T21:00:00.000Z	27 \| good	5.096 \| good	11.224 \| good	28.318 \| good	0.467 \| good	3.128 \| good	0.166 \| good
2025-12-12T22:00:00.000Z	27 \| good	5.229 \| good	12.035 \| good	27.81 \| good	0.48 \| good	3.295 \| good	0.166 \| good
2025-12-12T23:00:00.000Z	33 \| good	5.666 \| good	13.155 \| good	25.299 \| good	0.658 \| good	5.747 \| good	0.206 \| good
2025-12-13T00:00:00.000Z	33 \| good	5.742 \| good	14.538 \| good	20.634 \| good	0.593 \| good	12.854 \| good	0.266 \| good
2025-12-13T01:00:00.000Z	33 \| good	6.173 \| good	16.072 \| good	16.725 \| good	0.707 \| good	18.462 \| good	0.337 \| good
2025-12-13T02:00:00.000Z	44 \| good	7.508 \| good	21.233 \| good	9.17 \| good	0.778 \| good	26.008 \| good	0.586 \| good
2025-12-13T03:00:00.000Z	62 \| moderate	14.827 \| fine	66.739 \| fine	3.709 \| good	4.019 \| good	27.641 \| good	0.458 \| good
2025-12-13T04:00:00.000Z	56 \| moderate	11.716 \| good	28.395 \| good	4.454 \| good	0.674 \| good	29.003 \| good	0.621 \| good
2025-12-13T05:00:00.000Z	56 \| moderate	12.427 \| fine	29.845 \| good	2.458 \| good	0.639 \| good	27.431 \| good	0.752 \| good
2025-12-13T06:00:00.000Z	60 \| moderate	14.467 \| fine	32.122 \| good	2.804 \| good	0.826 \| good	26.245 \| good	0.688 \| good
2025-12-13T07:00:00.000Z	64 \| moderate	16.086 \| fine	35.434 \| good	2.667 \| good	0.79 \| good	25.924 \| good	0.71 \| good
2025-12-13T08:00:00.000Z	62 \| moderate	14.991 \| fine	31.808 \| good	2.629 \| good	0.744 \| good	25.5 \| good	0.752 \| good
2025-12-13T09:00:00.000Z	58 \| moderate	12.807 \| fine	26.727 \| good	2.63 \| good	0.624 \| good	24.816 \| good	0.661 \| good
2025-12-13T10:00:00.000Z	54 \| moderate	11.443 \| good	23.6 \| good	8.388 \| good	0.596 \| good	24.078 \| good	0.6 \| good
2025-12-13T11:00:00.000Z	54 \| moderate	11.006 \| good	20.947 \| good	3.728 \| good	0.553 \| good	24.186 \| good	0.559 \| good
2025-12-13T12:00:00.000Z	52 \| moderate	10.176 \| good	21.995 \| good	4.91 \| good	0.542 \| good	20.706 \| good	0.53 \| good
2025-12-13T13:00:00.000Z	52 \| moderate	10.257 \| good	19.416 \| good	4.97 \| good	0.595 \| good	20.786 \| good	0.487 \| good
2025-12-13T14:00:00.000Z	52 \| moderate	9.617 \| good	20.557 \| good	4.385 \| good	0.566 \| good	22.748 \| good	0.534 \| good
2025-12-13T14:00:00.000Z	49 \| good	9.348 \| good	36.598 \| good	3.758 \| good	0.585 \| good	27.226 \| good	0.533 \| good
2025-12-13T15:00:00.000Z	54 \| moderate	11.49 \| good	50.79 \| good	16.513 \| good	3.194 \| good	8.407 \| good	0.211 \| good
2025-12-13T16:00:00.000Z	56 \| moderate	11.591 \| good	51.296 \| good	16.639 \| good	3.154 \| good	7.199 \| good	0.205 \| good
2025-12-13T17:00:00.000Z	56 \| moderate	12.391 \| fine	55.517 \| fine	16.824 \| good	3.114 \| good	5.992 \| good	0.199 \| good
2025-12-13T18:00:00.000Z	56 \| moderate	11.7 \| good	51.56 \| good	19.778 \| good	3.074 \| good	4.784 \| good	0.193 \| good
2025-12-13T19:00:00.000Z	54 \| moderate	11.185 \| good	49.596 \| good	20.596 \| good	2.942 \| good	6.909 \| good	0.204 \| good
2025-12-13T20:00:00.000Z	56 \| moderate	12.226 \| fine	55.019 \| fine	17.554 \| good	2.811 \| good	9.033 \| good	0.216 \| good
2025-12-13T21:00:00.000Z	56 \| moderate	11.89 \| good	53.287 \| good	16.849 \| good	2.679 \| good	11.158 \| good	0.228 \| good
2025-12-13T22:00:00.000Z	52 \| moderate	10.158 \| good	44.914 \| good	13.787 \| good	3.038 \| good	13.905 \| good	0.299 \| good
2025-12-13T23:00:00.000Z	54 \| moderate	10.889 \| good	48.033 \| good	10.449 \| good	3.397 \| good	16.651 \| good	0.37 \| good
2025-12-14T00:00:00.000Z	62 \| moderate	14.701 \| fine	65.65 \| fine	6.15 \| good	3.756 \| good	19.398 \| good	0.441 \| good
2025-12-14T01:00:00.000Z	66 \| moderate	17.232 \| fine	76.054 \| fine	4.152 \| good	3.791 \| good	19.692 \| good	0.415 \| good
2025-12-14T02:00:00.000Z	67 \| moderate	17.863 \| fine	78.789 \| fine	5.78 \| good	3.827 \| good	19.985 \| good	0.389 \| good
2025-12-14T03:00:00.000Z	71 \| moderate	20.248 \| fine	89.144 \| fine	11.072 \| good	3.862 \| good	20.278 \| good	0.362 \| good
2025-12-14T04:00:00.000Z	62 \| moderate	15.413 \| fine	68.903 \| fine	14.161 \| good	3.737 \| good	20.103 \| good	0.331 \| good
2025-12-14T05:00:00.000Z	54 \| moderate	10.557 \| good	46.69 \| good	21.841 \| good	3.612 \| good	19.927 \| good	0.299 \| good
2025-12-14T06:00:00.000Z	54 \| moderate	10.572 \| good	46.716 \| good	20.99 \| good	3.487 \| good	19.752 \| good	0.267 \| good
2025-12-14T07:00:00.000Z	56 \| moderate	12.142 \| fine	54.618 \| good	23.575 \| good	3.456 \| good	15.865 \| good	0.241 \| good
2025-12-14T08:00:00.000Z	62 \| moderate	14.913 \| fine	66.794 \| fine	19.937 \| good	3.426 \| good	11.979 \| good	0.215 \| good
2025-12-14T09:00:00.000Z	52 \| moderate	10.149 \| good	45.197 \| good	21.74 \| good	3.395 \| good	8.092 \| good	0.189 \| good
2025-12-14T10:00:00.000Z	33 \| good	5.796 \| good	25.509 \| good	26.06 \| good	3.157 \| good	7.391 \| good	0.193 \| good
2025-12-14T11:00:00.000Z	25 \| good	4.038 \| good	17.717 \| good	27.419 \| good	2.919 \| good	6.689 \| good	0.198 \| good
2025-12-14T12:00:00.000Z	26 \| good	2.861 \| good	11.681 \| good	27.889 \| good	2.681 \| good	5.987 \| good	0.203 \| good
2025-12-14T13:00:00.000Z	28 \| good	1.775 \| good	7.29 \| good	29.849 \| good	2.443 \| good	4.96 \| good	0.191 \| good
2025-12-14T14:00:00.000Z	30 \| good	1.599 \| good	6.379 \| good	31.536 \| good	2.206 \| good	3.932 \| good	0.179 \| good
2025-12-14T15:00:00.000Z	29 \| good	2.491 \| good	10.128 \| good	30.759 \| good	1.968 \| good	2.905 \| good	0.168 \| good
2025-12-14T16:00:00.000Z	29 \| good	2.735 \| good	10.993 \| good	31.468 \| good	1.88 \| good	2.672 \| good	0.163 \| good
2025-12-14T17:00:00.000Z	30 \| good	2.819 \| good	11.575 \| good	31.847 \| good	1.792 \| good	2.44 \| good	0.158 \| good
2025-12-14T18:00:00.000Z	28 \| good	3.23 \| good	14.005 \| good	29.63 \| good	1.704 \| good	2.207 \| good	0.153 \| good
2025-12-14T19:00:00.000Z	26 \| good	3.33 \| good	14.519 \| good	28.092 \| good	1.669 \| good	2.639 \| good	0.155 \| good
2025-12-14T20:00:00.000Z	24 \| good	2.92 \| good	12.28 \| good	25.974 \| good	1.635 \| good	3.071 \| good	0.157 \| good
2025-12-14T21:00:00.000Z	22 \| good	2.795 \| good	11.249 \| good	24.227 \| good	1.6 \| good	3.502 \| good	0.159 \| good
2025-12-14T22:00:00.000Z	21 \| good	1.763 \| good	7.208 \| good	22.847 \| good	1.532 \| good	3.807 \| good	0.158 \| good
2025-12-14T23:00:00.000Z	20 \| good	1.139 \| good	4.575 \| good	21.844 \| good	1.464 \| good	4.111 \| good	0.158 \| good
2025-12-15T00:00:00.000Z	23 \| good	1.405 \| good	5.418 \| good	24.67 \| good	1.396 \| good	4.415 \| good	0.157 \| good
2025-12-15T01:00:00.000Z	24 \| good	1.573 \| good	6.345 \| good	26.205 \| good	1.451 \| good	4.341 \| good	0.157 \| good
2025-12-15T02:00:00.000Z	25 \| good	1.534 \| good	6.062 \| good	26.9 \| good	1.506 \| good	4.267 \| good	0.156 \| good
2025-12-15T03:00:00.000Z	26 \| good	1.515 \| good	6.293 \| good	27.866 \| good	1.561 \| good	4.193 \| good	0.156 \| good
2025-12-15T04:00:00.000Z	25 \| good	1.472 \| good	5.832 \| good	26.987 \| good	1.506 \| good	3.875 \| good	0.156 \| good
2025-12-15T05:00:00.000Z	24 \| good	1.585 \| good	6.388 \| good	25.95 \| good	1.452 \| good	3.557 \| good	0.155 \| good
2025-12-15T06:00:00.000Z	24 \| good	1.663 \| good	7.036 \| good	25.888 \| good	1.398 \| good	3.239 \| good	0.155 \| good
2025-12-15T07:00:00.000Z	23 \| good	2.736 \| good	11.097 \| good	25.051 \| good	1.383 \| good	3.052 \| good	0.153 \| good
2025-12-15T08:00:00.000Z	24 \| good	3.744 \| good	16.385 \| good	25.774 \| good	1.369 \| good	2.865 \| good	0.15 \| good
2025-12-15T09:00:00.000Z	26 \| good	4.484 \| good	19.594 \| good	27.757 \| good	1.354 \| good	2.678 \| good	0.148 \| good
2025-12-15T10:00:00.000Z	25 \| good	3.559 \| good	15.626 \| good	27.441 \| good	1.405 \| good	3.218 \| good	0.151 \| good
2025-12-15T11:00:00.000Z	24 \| good	2.114 \| good	8.617 \| good	26.257 \| good	1.455 \| good	3.759 \| good	0.154 \| good
2025-12-15T12:00:00.000Z	23 \| good	2.011 \| good	8.094 \| good	25.027 \| good	1.506 \| good	4.3 \| good	0.156 \| good
2025-12-15T13:00:00.000Z	22 \| good	3.404 \| good	15.094 \| good	23.715 \| good	1.673 \| good	3.866 \| good	0.158 \| good
2025-12-15T14:00:00.000Z	23 \| good	4.303 \| good	18.926 \| good	25.436 \| good	1.84 \| good	3.433 \| good	0.16 \| 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?