What is the PM10 level in Boulder, Colorado at the moment?

The PM10 concentration in Boulder, Colorado is 41.053 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Boulder, Colorado at the moment?

Currently, Boulder, Colorado has a sulfur dioxide (SO2) concentration of 1.445 ppb.

What is the ozone (O3) level in Boulder, Colorado at the moment?

The current ozone (O3) level in Boulder, Colorado at the moment is 30.595 ppm.

What is the nitrogen dioxide (NO2) level in Boulder, Colorado at the moment?

Nitrogen dioxide (NO2) level in Boulder, Colorado at the moment is 19.717 ppb.

Live air quality index in Boulder, Colorado today

Q: What is the PM2.5 level in Boulder, Colorado at the moment?

PM2.5 levels in Boulder, Colorado are currently 5.617 μg/m3.

Stay updated with real-time air quality in Boulder, Colorado 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

Boulder, Colorado

Last updated: ... (Local time)

Major air pollutants in Boulder, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.71 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

28.09 μg/m³

155

255

425

605+

Ozone (O₃)

32.42 ppb

201

201+

Sulfur Dioxide (SO₂)

0.45 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.12 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Boulder, Colorado

Get Live Pollen Counts

Boulder, Colorado

Scroll To Air Quality Map

Track live Boulder, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-22T07:00:00.000Z	40 \| good	3.206 \| good	16.018 \| good	42.785 \| good	0.583 \| good	16.378 \| good	0.234 \| good
2025-10-22T08:00:00.000Z	37 \| good	3.006 \| good	15.015 \| good	40.119 \| good	0.67 \| good	14.554 \| good	0.249 \| good
2025-10-22T09:00:00.000Z	35 \| good	2.904 \| good	14.001 \| good	37.774 \| good	0.471 \| good	9.104 \| good	0.252 \| good
2025-10-22T10:00:00.000Z	34 \| good	2.704 \| good	12.006 \| good	37.321 \| good	0.474 \| good	7.97 \| good	0.219 \| good
2025-10-22T11:00:00.000Z	33 \| good	2.504 \| good	12.007 \| good	35.559 \| good	0.659 \| good	8.892 \| good	0.235 \| good
2025-10-22T12:00:00.000Z	35 \| good	2.306 \| good	11.015 \| good	38.385 \| good	0.849 \| good	10.822 \| good	0.283 \| good
2025-10-22T13:00:00.000Z	36 \| good	2.204 \| good	10.022 \| good	39.466 \| good	0.937 \| good	17.132 \| good	0.403 \| good
2025-10-22T14:00:00.000Z	34 \| good	2.311 \| good	13.058 \| good	36.894 \| good	1.298 \| good	19.448 \| good	0.404 \| good
2025-10-22T15:00:00.000Z	31 \| good	2.818 \| good	19.103 \| good	34.169 \| good	1.425 \| good	21.929 \| good	0.414 \| good
2025-10-22T16:00:00.000Z	30 \| good	3.015 \| good	21.074 \| good	32.133 \| good	0.973 \| good	16.704 \| good	0.366 \| good
2025-10-22T17:00:00.000Z	33 \| good	3.309 \| good	20.065 \| good	35.787 \| good	1.316 \| good	15.517 \| good	0.267 \| good
2025-10-22T18:00:00.000Z	31 \| good	3.32 \| good	22.12 \| good	33.105 \| good	0.539 \| good	16.099 \| good	0.252 \| good
2025-10-22T19:00:00.000Z	32 \| good	3.213 \| good	24.021 \| good	34.905 \| good	0.476 \| good	9.289 \| good	0.222 \| good
2025-10-22T20:00:00.000Z	36 \| good	3.31 \| good	25.003 \| good	39.321 \| good	0.417 \| good	7.919 \| good	0.205 \| good
2025-10-22T21:00:00.000Z	42 \| good	3.303 \| good	25.999 \| good	45.039 \| good	0.451 \| good	5.795 \| good	0.145 \| good
2025-10-22T22:00:00.000Z	42 \| good	3.099 \| good	22.96 \| good	44.54 \| good	0.548 \| good	9.343 \| good	0.174 \| good
2025-10-22T23:00:00.000Z	46 \| good	3 \| good	25.007 \| good	49.528 \| good	0.547 \| good	12.418 \| good	0.174 \| good
2025-10-23T00:00:00.000Z	44 \| good	3.101 \| good	25.977 \| good	48.21 \| good	0.738 \| good	19.616 \| good	0.323 \| good
2025-10-23T01:00:00.000Z	44 \| good	3.406 \| good	25.991 \| good	47.539 \| good	0.999 \| good	29.257 \| good	0.49 \| good
2025-10-23T02:00:00.000Z	44 \| good	3.313 \| good	25.055 \| good	46.913 \| good	2.254 \| good	24 \| good	0.533 \| good
2025-10-23T03:00:00.000Z	44 \| good	3.331 \| good	24.089 \| good	46.538 \| good	0.898 \| good	18.296 \| good	0.531 \| good
2025-10-23T04:00:00.000Z	42 \| good	3.316 \| good	23.074 \| good	44.589 \| good	0.505 \| good	16.301 \| good	0.389 \| good
2025-10-23T05:00:00.000Z	44 \| good	3.213 \| good	21.026 \| good	47.483 \| good	0.542 \| good	22.49 \| good	0.384 \| good
2025-10-23T06:00:00.000Z	41 \| good	3.116 \| good	17.109 \| good	43.932 \| good	0.467 \| good	28.277 \| good	0.293 \| good
2025-10-23T07:00:00.000Z	37 \| good	3.01 \| good	15.035 \| good	39.759 \| good	0.468 \| good	27.3 \| good	0.322 \| good
2025-10-23T08:00:00.000Z	37 \| good	2.906 \| good	14.012 \| good	39.843 \| good	0.531 \| good	29.074 \| good	0.322 \| good
2025-10-23T09:00:00.000Z	39 \| good	2.803 \| good	12.018 \| good	41.859 \| good	0.596 \| good	30.804 \| good	0.322 \| good
2025-10-23T10:00:00.000Z	39 \| good	2.508 \| good	10.014 \| good	41.579 \| good	0.57 \| good	12.089 \| good	0.353 \| good
2025-10-23T11:00:00.000Z	39 \| good	3.105 \| good	17.992 \| good	41.827 \| good	0.509 \| good	12.742 \| good	0.381 \| good
2025-10-23T12:00:00.000Z	36 \| good	3.403 \| good	22.95 \| good	39.162 \| good	0.819 \| good	8.78 \| good	0.442 \| good
2025-10-23T13:00:00.000Z	44 \| good	5.391 \| good	47.828 \| good	39.053 \| good	1.131 \| good	15.714 \| good	0.561 \| good
2025-10-23T14:00:00.000Z	39 \| good	5.205 \| good	41.916 \| good	36.673 \| good	1.643 \| good	20.054 \| good	0.783 \| good
2025-10-23T15:00:00.000Z	50 \| good	6.104 \| good	53.871 \| good	31.102 \| good	1.715 \| good	26.956 \| good	0.784 \| good
2025-10-23T16:00:00.000Z	49 \| good	6.401 \| good	52.88 \| good	32.365 \| good	1.724 \| good	21.643 \| good	0.599 \| good
2025-10-23T17:00:00.000Z	41 \| good	6.213 \| good	43.947 \| good	32.983 \| good	1.679 \| good	17.547 \| good	0.459 \| good
2025-10-23T18:00:00.000Z	33 \| good	5.815 \| good	36.013 \| good	34.231 \| good	1.701 \| good	12.856 \| good	0.476 \| good
2025-10-23T19:00:00.000Z	38 \| good	5.617 \| good	41.053 \| good	30.595 \| good	1.445 \| good	19.717 \| good	0.354 \| good
2025-10-23T20:00:00.000Z	31 \| good	4.401 \| good	28.944 \| good	34.342 \| good	1.222 \| good	18.764 \| good	0.266 \| good
2025-10-23T21:00:00.000Z	40 \| good	4.003 \| good	25.978 \| good	42.586 \| good	0.83 \| good	20.172 \| good	0.265 \| good
2025-10-23T22:00:00.000Z	39 \| good	4.103 \| good	27.969 \| good	42.398 \| good	0.598 \| good	10.769 \| good	0.205 \| good
2025-10-23T23:00:00.000Z	41 \| good	4.61 \| good	32 \| good	43.61 \| good	0.647 \| good	14.752 \| good	0.202 \| good
2025-10-24T00:00:00.000Z	40 \| good	5.698 \| good	42.895 \| good	40.561 \| good	0.53 \| good	21.901 \| good	0.323 \| good
2025-10-24T01:00:00.000Z	42 \| good	5.809 \| good	44.955 \| good	44.512 \| good	0.514 \| good	25.111 \| good	0.381 \| good
2025-10-24T02:00:00.000Z	39 \| good	5.32 \| good	40.019 \| good	42.403 \| good	0.589 \| good	25.236 \| good	0.337 \| good
2025-10-24T03:00:00.000Z	38 \| good	2.781 \| good	12.167 \| good	41.21 \| good	0.756 \| good	11.516 \| good	0.183 \| good
2025-10-24T04:00:00.000Z	34 \| good	5.012 \| good	33.014 \| good	36.954 \| good	0.58 \| good	7.125 \| good	0.277 \| good
2025-10-24T05:00:00.000Z	35 \| good	5.111 \| good	32.027 \| good	38.122 \| good	0.519 \| good	5.017 \| good	0.29 \| good
2025-10-24T06:00:00.000Z	30 \| good	4.714 \| good	28.093 \| good	32.425 \| good	0.447 \| good	5.122 \| good	0.262 \| good
2025-10-24T06:00:00.000Z	30 \| good	4.714 \| good	28.093 \| good	32.425 \| good	0.447 \| good	5.122 \| good	0.262 \| good
2025-10-23T21:00:00.000Z	42 \| good	0.71 \| good	2.643 \| good	44.639 \| good	0.858 \| good	3.7 \| good	0.118 \| good
2025-10-23T22:00:00.000Z	43 \| good	0.431 \| good	1.513 \| good	45.906 \| good	0.839 \| good	5.643 \| good	0.134 \| good
2025-10-23T23:00:00.000Z	44 \| good	0.508 \| good	1.965 \| good	47.138 \| good	0.82 \| good	7.585 \| good	0.15 \| good
2025-10-24T00:00:00.000Z	40 \| good	0.347 \| good	1.19 \| good	43.452 \| good	0.801 \| good	9.528 \| good	0.167 \| good
2025-10-24T01:00:00.000Z	38 \| good	0.762 \| good	2.782 \| good	41.064 \| good	0.807 \| good	10.992 \| good	0.181 \| good
2025-10-24T02:00:00.000Z	42 \| good	0.948 \| good	3.595 \| good	44.605 \| good	0.813 \| good	12.455 \| good	0.195 \| good
2025-10-24T03:00:00.000Z	39 \| good	1.149 \| good	4.575 \| good	41.655 \| good	0.819 \| good	13.919 \| good	0.21 \| good
2025-10-24T04:00:00.000Z	38 \| good	2.125 \| good	8.793 \| good	40.868 \| good	0.753 \| good	11.89 \| good	0.193 \| good
2025-10-24T05:00:00.000Z	35 \| good	1.867 \| good	7.737 \| good	38.185 \| good	0.687 \| good	9.861 \| good	0.177 \| good
2025-10-24T06:00:00.000Z	36 \| good	2.037 \| good	8.362 \| good	38.9 \| good	0.622 \| good	7.832 \| good	0.161 \| good
2025-10-24T07:00:00.000Z	37 \| good	2.11 \| good	8.802 \| good	40.179 \| good	0.57 \| good	6.962 \| good	0.152 \| good
2025-10-24T08:00:00.000Z	34 \| good	1.922 \| good	7.856 \| good	36.728 \| good	0.519 \| good	6.092 \| good	0.144 \| good
2025-10-24T09:00:00.000Z	32 \| good	0.69 \| good	2.642 \| good	34.601 \| good	0.468 \| good	5.222 \| good	0.136 \| good
2025-10-24T10:00:00.000Z	31 \| good	0.575 \| good	2 \| good	33.225 \| good	0.463 \| good	5.083 \| good	0.132 \| good
2025-10-24T11:00:00.000Z	31 \| good	0.736 \| good	2.685 \| good	33.411 \| good	0.459 \| good	4.944 \| good	0.129 \| good
2025-10-24T12:00:00.000Z	29 \| good	0.783 \| good	3.001 \| good	31.143 \| good	0.455 \| good	4.805 \| good	0.125 \| good
2025-10-24T13:00:00.000Z	29 \| good	1.053 \| good	4.458 \| good	31.326 \| good	0.505 \| good	6.686 \| good	0.171 \| good
2025-10-24T14:00:00.000Z	28 \| good	2.386 \| good	9.899 \| good	30.177 \| good	0.555 \| good	8.566 \| good	0.218 \| good
2025-10-24T15:00:00.000Z	32 \| good	2.668 \| good	10.893 \| good	34.884 \| good	0.605 \| good	10.446 \| good	0.264 \| good
2025-10-24T16:00:00.000Z	32 \| good	3.033 \| good	13.112 \| good	35.419 \| good	0.708 \| good	7.583 \| good	0.22 \| good
2025-10-24T17:00:00.000Z	33 \| good	2.471 \| good	9.98 \| good	35.899 \| good	0.811 \| good	4.721 \| good	0.175 \| good
2025-10-24T18:00:00.000Z	36 \| good	2.378 \| good	9.51 \| good	38.68 \| good	0.914 \| good	1.858 \| good	0.131 \| good
2025-10-24T19:00:00.000Z	39 \| good	2.777 \| good	11.51 \| good	42.443 \| good	0.835 \| good	1.668 \| good	0.129 \| good
2025-10-24T20:00:00.000Z	44 \| good	1.449 \| good	5.809 \| good	46.744 \| good	0.756 \| good	1.478 \| good	0.127 \| good
2025-10-24T21:00:00.000Z	45 \| good	1.155 \| good	4.522 \| good	49.37 \| good	0.677 \| good	1.288 \| good	0.125 \| good
2025-10-24T22:00:00.000Z	48 \| good	1.852 \| good	7.508 \| good	51.761 \| good	0.703 \| good	3.117 \| good	0.14 \| good
2025-10-24T23:00:00.000Z	50 \| good	0.667 \| good	2.377 \| good	53.727 \| good	0.73 \| good	4.946 \| good	0.155 \| good
2025-10-25T00:00:00.000Z	45 \| good	3.685 \| good	15.808 \| good	48.516 \| good	0.756 \| good	6.775 \| good	0.17 \| good
2025-10-25T01:00:00.000Z	43 \| good	3.907 \| good	16.877 \| good	45.825 \| good	0.879 \| good	11.022 \| good	0.207 \| good
2025-10-25T02:00:00.000Z	36 \| good	3.518 \| good	15.126 \| good	39.255 \| good	1.001 \| good	15.27 \| good	0.243 \| good
2025-10-25T03:00:00.000Z	34 \| good	3.064 \| good	13.118 \| good	37.015 \| good	1.123 \| good	19.517 \| good	0.28 \| good
2025-10-25T04:00:00.000Z	34 \| good	3.35 \| good	14.408 \| good	37.146 \| good	1.014 \| good	20.527 \| good	0.286 \| good
2025-10-25T05:00:00.000Z	34 \| good	2.116 \| good	8.739 \| good	37.243 \| good	0.905 \| good	21.537 \| good	0.292 \| good
2025-10-25T06:00:00.000Z	33 \| good	1.853 \| good	7.627 \| good	36.407 \| good	0.795 \| good	22.547 \| good	0.299 \| good
2025-10-25T07:00:00.000Z	34 \| good	1.766 \| good	7.57 \| good	37.274 \| good	0.686 \| good	19.678 \| good	0.278 \| good
2025-10-25T08:00:00.000Z	33 \| good	2.061 \| good	8.378 \| good	35.591 \| good	0.577 \| good	16.808 \| good	0.258 \| good
2025-10-25T09:00:00.000Z	31 \| good	1.484 \| good	6.047 \| good	33.187 \| good	0.467 \| good	13.938 \| good	0.237 \| good
2025-10-25T10:00:00.000Z	29 \| good	0.568 \| good	2.035 \| good	30.846 \| good	0.439 \| good	11.854 \| good	0.219 \| good
2025-10-25T11:00:00.000Z	29 \| good	0.406 \| good	1.575 \| good	30.755 \| good	0.41 \| good	9.77 \| good	0.201 \| good
2025-10-25T12:00:00.000Z	26 \| good	0.516 \| good	2 \| good	27.859 \| good	0.381 \| good	7.686 \| good	0.183 \| good
2025-10-25T13:00:00.000Z	27 \| good	0.475 \| good	1.965 \| good	28.55 \| good	0.393 \| good	7.446 \| good	0.193 \| good
2025-10-25T14:00:00.000Z	30 \| good	3.478 \| good	15.409 \| good	32.296 \| good	0.405 \| good	7.206 \| good	0.203 \| good
2025-10-25T15:00:00.000Z	32 \| good	2.649 \| good	10.823 \| good	35.278 \| good	0.418 \| good	6.966 \| good	0.213 \| good
2025-10-25T16:00:00.000Z	36 \| good	2.161 \| good	8.678 \| good	38.599 \| good	0.543 \| good	5.742 \| good	0.186 \| good
2025-10-25T17:00:00.000Z	36 \| good	1.381 \| good	5.459 \| good	38.713 \| good	0.669 \| good	4.518 \| good	0.16 \| good
2025-10-25T18:00:00.000Z	38 \| good	1.244 \| good	4.976 \| good	40.831 \| good	0.794 \| good	3.294 \| good	0.134 \| good
2025-10-25T19:00:00.000Z	40 \| good	1.64 \| good	6.786 \| good	42.942 \| good	0.756 \| good	2.863 \| good	0.127 \| good
2025-10-25T20:00:00.000Z	42 \| good	1.628 \| good	6.786 \| good	45.105 \| good	0.717 \| good	2.432 \| good	0.121 \| good

Boulder

Get reliable air quality data to drive your business

Boulder, Colorado air quality map: Stay updated on AQI near you

0.35ppm

How accurate is Colorado, USA air quality data?

Air quality and pollutant data for Colorado, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

Frequently asked questions

How often is air quality information updated for Boulder, Colorado?

The air quality information for Boulder, Colorado is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Boulder, Colorado at its worst?

In the past 24 hours, the air quality in Boulder, Colorado was at its worst at 03:00:00 on 2025-10-23.

When did Boulder, Colorado experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Boulder, Colorado was observed at 06:00:00 on 2025-10-23.

What is the AQI in Boulder, Colorado right now?

As of now, the AQI in Boulder, Colorado is 38, indicating Good conditions.

What is the most common type of pollution in Boulder, Colorado?

Boulder, Colorado air has the highest levels of PM10.

What should I do in case of poor air quality in Boulder, Colorado?

Poor air quality in Boulder, Colorado means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Boulder, Colorado at the moment?

PM_2.5 levels in Boulder, Colorado are currently 5.617 μg/m³.

What is the PM₁₀ level in Boulder, Colorado at the moment?

The PM₁₀ concentration in Boulder, Colorado is 41.053 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Boulder, Colorado at the moment?

The current carbon monoxide (CO) concentration in Boulder, Colorado is 0.354 ppm.

What is the sulfur dioxide (SO₂) level in Boulder, Colorado at the moment?

Currently, Boulder, Colorado has a sulfur dioxide (SO₂) concentration of 1.445 ppb.

What is the ozone (O₃) level in Boulder, Colorado at the moment?

The current ozone (O₃) level in Boulder, Colorado at the moment is 30.595 ppm.

What is the nitrogen dioxide (NO₂) level in Boulder, Colorado at the moment?

Nitrogen dioxide (NO₂) level in Boulder, Colorado at the moment is 19.717 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-22T07:00:00.000Z	40 \| good	3.206 \| good	16.018 \| good	42.785 \| good	0.583 \| good	16.378 \| good	0.234 \| good
2025-10-22T08:00:00.000Z	37 \| good	3.006 \| good	15.015 \| good	40.119 \| good	0.67 \| good	14.554 \| good	0.249 \| good
2025-10-22T09:00:00.000Z	35 \| good	2.904 \| good	14.001 \| good	37.774 \| good	0.471 \| good	9.104 \| good	0.252 \| good
2025-10-22T10:00:00.000Z	34 \| good	2.704 \| good	12.006 \| good	37.321 \| good	0.474 \| good	7.97 \| good	0.219 \| good
2025-10-22T11:00:00.000Z	33 \| good	2.504 \| good	12.007 \| good	35.559 \| good	0.659 \| good	8.892 \| good	0.235 \| good
2025-10-22T12:00:00.000Z	35 \| good	2.306 \| good	11.015 \| good	38.385 \| good	0.849 \| good	10.822 \| good	0.283 \| good
2025-10-22T13:00:00.000Z	36 \| good	2.204 \| good	10.022 \| good	39.466 \| good	0.937 \| good	17.132 \| good	0.403 \| good
2025-10-22T14:00:00.000Z	34 \| good	2.311 \| good	13.058 \| good	36.894 \| good	1.298 \| good	19.448 \| good	0.404 \| good
2025-10-22T15:00:00.000Z	31 \| good	2.818 \| good	19.103 \| good	34.169 \| good	1.425 \| good	21.929 \| good	0.414 \| good
2025-10-22T16:00:00.000Z	30 \| good	3.015 \| good	21.074 \| good	32.133 \| good	0.973 \| good	16.704 \| good	0.366 \| good
2025-10-22T17:00:00.000Z	33 \| good	3.309 \| good	20.065 \| good	35.787 \| good	1.316 \| good	15.517 \| good	0.267 \| good
2025-10-22T18:00:00.000Z	31 \| good	3.32 \| good	22.12 \| good	33.105 \| good	0.539 \| good	16.099 \| good	0.252 \| good
2025-10-22T19:00:00.000Z	32 \| good	3.213 \| good	24.021 \| good	34.905 \| good	0.476 \| good	9.289 \| good	0.222 \| good
2025-10-22T20:00:00.000Z	36 \| good	3.31 \| good	25.003 \| good	39.321 \| good	0.417 \| good	7.919 \| good	0.205 \| good
2025-10-22T21:00:00.000Z	42 \| good	3.303 \| good	25.999 \| good	45.039 \| good	0.451 \| good	5.795 \| good	0.145 \| good
2025-10-22T22:00:00.000Z	42 \| good	3.099 \| good	22.96 \| good	44.54 \| good	0.548 \| good	9.343 \| good	0.174 \| good
2025-10-22T23:00:00.000Z	46 \| good	3 \| good	25.007 \| good	49.528 \| good	0.547 \| good	12.418 \| good	0.174 \| good
2025-10-23T00:00:00.000Z	44 \| good	3.101 \| good	25.977 \| good	48.21 \| good	0.738 \| good	19.616 \| good	0.323 \| good
2025-10-23T01:00:00.000Z	44 \| good	3.406 \| good	25.991 \| good	47.539 \| good	0.999 \| good	29.257 \| good	0.49 \| good
2025-10-23T02:00:00.000Z	44 \| good	3.313 \| good	25.055 \| good	46.913 \| good	2.254 \| good	24 \| good	0.533 \| good
2025-10-23T03:00:00.000Z	44 \| good	3.331 \| good	24.089 \| good	46.538 \| good	0.898 \| good	18.296 \| good	0.531 \| good
2025-10-23T04:00:00.000Z	42 \| good	3.316 \| good	23.074 \| good	44.589 \| good	0.505 \| good	16.301 \| good	0.389 \| good
2025-10-23T05:00:00.000Z	44 \| good	3.213 \| good	21.026 \| good	47.483 \| good	0.542 \| good	22.49 \| good	0.384 \| good
2025-10-23T06:00:00.000Z	41 \| good	3.116 \| good	17.109 \| good	43.932 \| good	0.467 \| good	28.277 \| good	0.293 \| good
2025-10-23T07:00:00.000Z	37 \| good	3.01 \| good	15.035 \| good	39.759 \| good	0.468 \| good	27.3 \| good	0.322 \| good
2025-10-23T08:00:00.000Z	37 \| good	2.906 \| good	14.012 \| good	39.843 \| good	0.531 \| good	29.074 \| good	0.322 \| good
2025-10-23T09:00:00.000Z	39 \| good	2.803 \| good	12.018 \| good	41.859 \| good	0.596 \| good	30.804 \| good	0.322 \| good
2025-10-23T10:00:00.000Z	39 \| good	2.508 \| good	10.014 \| good	41.579 \| good	0.57 \| good	12.089 \| good	0.353 \| good
2025-10-23T11:00:00.000Z	39 \| good	3.105 \| good	17.992 \| good	41.827 \| good	0.509 \| good	12.742 \| good	0.381 \| good
2025-10-23T12:00:00.000Z	36 \| good	3.403 \| good	22.95 \| good	39.162 \| good	0.819 \| good	8.78 \| good	0.442 \| good
2025-10-23T13:00:00.000Z	44 \| good	5.391 \| good	47.828 \| good	39.053 \| good	1.131 \| good	15.714 \| good	0.561 \| good
2025-10-23T14:00:00.000Z	39 \| good	5.205 \| good	41.916 \| good	36.673 \| good	1.643 \| good	20.054 \| good	0.783 \| good
2025-10-23T15:00:00.000Z	50 \| good	6.104 \| good	53.871 \| good	31.102 \| good	1.715 \| good	26.956 \| good	0.784 \| good
2025-10-23T16:00:00.000Z	49 \| good	6.401 \| good	52.88 \| good	32.365 \| good	1.724 \| good	21.643 \| good	0.599 \| good
2025-10-23T17:00:00.000Z	41 \| good	6.213 \| good	43.947 \| good	32.983 \| good	1.679 \| good	17.547 \| good	0.459 \| good
2025-10-23T18:00:00.000Z	33 \| good	5.815 \| good	36.013 \| good	34.231 \| good	1.701 \| good	12.856 \| good	0.476 \| good
2025-10-23T19:00:00.000Z	38 \| good	5.617 \| good	41.053 \| good	30.595 \| good	1.445 \| good	19.717 \| good	0.354 \| good
2025-10-23T20:00:00.000Z	31 \| good	4.401 \| good	28.944 \| good	34.342 \| good	1.222 \| good	18.764 \| good	0.266 \| good
2025-10-23T21:00:00.000Z	40 \| good	4.003 \| good	25.978 \| good	42.586 \| good	0.83 \| good	20.172 \| good	0.265 \| good
2025-10-23T22:00:00.000Z	39 \| good	4.103 \| good	27.969 \| good	42.398 \| good	0.598 \| good	10.769 \| good	0.205 \| good
2025-10-23T23:00:00.000Z	41 \| good	4.61 \| good	32 \| good	43.61 \| good	0.647 \| good	14.752 \| good	0.202 \| good
2025-10-24T00:00:00.000Z	40 \| good	5.698 \| good	42.895 \| good	40.561 \| good	0.53 \| good	21.901 \| good	0.323 \| good
2025-10-24T01:00:00.000Z	42 \| good	5.809 \| good	44.955 \| good	44.512 \| good	0.514 \| good	25.111 \| good	0.381 \| good
2025-10-24T02:00:00.000Z	39 \| good	5.32 \| good	40.019 \| good	42.403 \| good	0.589 \| good	25.236 \| good	0.337 \| good
2025-10-24T03:00:00.000Z	38 \| good	2.781 \| good	12.167 \| good	41.21 \| good	0.756 \| good	11.516 \| good	0.183 \| good
2025-10-24T04:00:00.000Z	34 \| good	5.012 \| good	33.014 \| good	36.954 \| good	0.58 \| good	7.125 \| good	0.277 \| good
2025-10-24T05:00:00.000Z	35 \| good	5.111 \| good	32.027 \| good	38.122 \| good	0.519 \| good	5.017 \| good	0.29 \| good
2025-10-24T06:00:00.000Z	30 \| good	4.714 \| good	28.093 \| good	32.425 \| good	0.447 \| good	5.122 \| good	0.262 \| good
2025-10-24T06:00:00.000Z	30 \| good	4.714 \| good	28.093 \| good	32.425 \| good	0.447 \| good	5.122 \| good	0.262 \| good
2025-10-23T21:00:00.000Z	42 \| good	0.71 \| good	2.643 \| good	44.639 \| good	0.858 \| good	3.7 \| good	0.118 \| good
2025-10-23T22:00:00.000Z	43 \| good	0.431 \| good	1.513 \| good	45.906 \| good	0.839 \| good	5.643 \| good	0.134 \| good
2025-10-23T23:00:00.000Z	44 \| good	0.508 \| good	1.965 \| good	47.138 \| good	0.82 \| good	7.585 \| good	0.15 \| good
2025-10-24T00:00:00.000Z	40 \| good	0.347 \| good	1.19 \| good	43.452 \| good	0.801 \| good	9.528 \| good	0.167 \| good
2025-10-24T01:00:00.000Z	38 \| good	0.762 \| good	2.782 \| good	41.064 \| good	0.807 \| good	10.992 \| good	0.181 \| good
2025-10-24T02:00:00.000Z	42 \| good	0.948 \| good	3.595 \| good	44.605 \| good	0.813 \| good	12.455 \| good	0.195 \| good
2025-10-24T03:00:00.000Z	39 \| good	1.149 \| good	4.575 \| good	41.655 \| good	0.819 \| good	13.919 \| good	0.21 \| good
2025-10-24T04:00:00.000Z	38 \| good	2.125 \| good	8.793 \| good	40.868 \| good	0.753 \| good	11.89 \| good	0.193 \| good
2025-10-24T05:00:00.000Z	35 \| good	1.867 \| good	7.737 \| good	38.185 \| good	0.687 \| good	9.861 \| good	0.177 \| good
2025-10-24T06:00:00.000Z	36 \| good	2.037 \| good	8.362 \| good	38.9 \| good	0.622 \| good	7.832 \| good	0.161 \| good
2025-10-24T07:00:00.000Z	37 \| good	2.11 \| good	8.802 \| good	40.179 \| good	0.57 \| good	6.962 \| good	0.152 \| good
2025-10-24T08:00:00.000Z	34 \| good	1.922 \| good	7.856 \| good	36.728 \| good	0.519 \| good	6.092 \| good	0.144 \| good
2025-10-24T09:00:00.000Z	32 \| good	0.69 \| good	2.642 \| good	34.601 \| good	0.468 \| good	5.222 \| good	0.136 \| good
2025-10-24T10:00:00.000Z	31 \| good	0.575 \| good	2 \| good	33.225 \| good	0.463 \| good	5.083 \| good	0.132 \| good
2025-10-24T11:00:00.000Z	31 \| good	0.736 \| good	2.685 \| good	33.411 \| good	0.459 \| good	4.944 \| good	0.129 \| good
2025-10-24T12:00:00.000Z	29 \| good	0.783 \| good	3.001 \| good	31.143 \| good	0.455 \| good	4.805 \| good	0.125 \| good
2025-10-24T13:00:00.000Z	29 \| good	1.053 \| good	4.458 \| good	31.326 \| good	0.505 \| good	6.686 \| good	0.171 \| good
2025-10-24T14:00:00.000Z	28 \| good	2.386 \| good	9.899 \| good	30.177 \| good	0.555 \| good	8.566 \| good	0.218 \| good
2025-10-24T15:00:00.000Z	32 \| good	2.668 \| good	10.893 \| good	34.884 \| good	0.605 \| good	10.446 \| good	0.264 \| good
2025-10-24T16:00:00.000Z	32 \| good	3.033 \| good	13.112 \| good	35.419 \| good	0.708 \| good	7.583 \| good	0.22 \| good
2025-10-24T17:00:00.000Z	33 \| good	2.471 \| good	9.98 \| good	35.899 \| good	0.811 \| good	4.721 \| good	0.175 \| good
2025-10-24T18:00:00.000Z	36 \| good	2.378 \| good	9.51 \| good	38.68 \| good	0.914 \| good	1.858 \| good	0.131 \| good
2025-10-24T19:00:00.000Z	39 \| good	2.777 \| good	11.51 \| good	42.443 \| good	0.835 \| good	1.668 \| good	0.129 \| good
2025-10-24T20:00:00.000Z	44 \| good	1.449 \| good	5.809 \| good	46.744 \| good	0.756 \| good	1.478 \| good	0.127 \| good
2025-10-24T21:00:00.000Z	45 \| good	1.155 \| good	4.522 \| good	49.37 \| good	0.677 \| good	1.288 \| good	0.125 \| good
2025-10-24T22:00:00.000Z	48 \| good	1.852 \| good	7.508 \| good	51.761 \| good	0.703 \| good	3.117 \| good	0.14 \| good
2025-10-24T23:00:00.000Z	50 \| good	0.667 \| good	2.377 \| good	53.727 \| good	0.73 \| good	4.946 \| good	0.155 \| good
2025-10-25T00:00:00.000Z	45 \| good	3.685 \| good	15.808 \| good	48.516 \| good	0.756 \| good	6.775 \| good	0.17 \| good
2025-10-25T01:00:00.000Z	43 \| good	3.907 \| good	16.877 \| good	45.825 \| good	0.879 \| good	11.022 \| good	0.207 \| good
2025-10-25T02:00:00.000Z	36 \| good	3.518 \| good	15.126 \| good	39.255 \| good	1.001 \| good	15.27 \| good	0.243 \| good
2025-10-25T03:00:00.000Z	34 \| good	3.064 \| good	13.118 \| good	37.015 \| good	1.123 \| good	19.517 \| good	0.28 \| good
2025-10-25T04:00:00.000Z	34 \| good	3.35 \| good	14.408 \| good	37.146 \| good	1.014 \| good	20.527 \| good	0.286 \| good
2025-10-25T05:00:00.000Z	34 \| good	2.116 \| good	8.739 \| good	37.243 \| good	0.905 \| good	21.537 \| good	0.292 \| good
2025-10-25T06:00:00.000Z	33 \| good	1.853 \| good	7.627 \| good	36.407 \| good	0.795 \| good	22.547 \| good	0.299 \| good
2025-10-25T07:00:00.000Z	34 \| good	1.766 \| good	7.57 \| good	37.274 \| good	0.686 \| good	19.678 \| good	0.278 \| good
2025-10-25T08:00:00.000Z	33 \| good	2.061 \| good	8.378 \| good	35.591 \| good	0.577 \| good	16.808 \| good	0.258 \| good
2025-10-25T09:00:00.000Z	31 \| good	1.484 \| good	6.047 \| good	33.187 \| good	0.467 \| good	13.938 \| good	0.237 \| good
2025-10-25T10:00:00.000Z	29 \| good	0.568 \| good	2.035 \| good	30.846 \| good	0.439 \| good	11.854 \| good	0.219 \| good
2025-10-25T11:00:00.000Z	29 \| good	0.406 \| good	1.575 \| good	30.755 \| good	0.41 \| good	9.77 \| good	0.201 \| good
2025-10-25T12:00:00.000Z	26 \| good	0.516 \| good	2 \| good	27.859 \| good	0.381 \| good	7.686 \| good	0.183 \| good
2025-10-25T13:00:00.000Z	27 \| good	0.475 \| good	1.965 \| good	28.55 \| good	0.393 \| good	7.446 \| good	0.193 \| good
2025-10-25T14:00:00.000Z	30 \| good	3.478 \| good	15.409 \| good	32.296 \| good	0.405 \| good	7.206 \| good	0.203 \| good
2025-10-25T15:00:00.000Z	32 \| good	2.649 \| good	10.823 \| good	35.278 \| good	0.418 \| good	6.966 \| good	0.213 \| good
2025-10-25T16:00:00.000Z	36 \| good	2.161 \| good	8.678 \| good	38.599 \| good	0.543 \| good	5.742 \| good	0.186 \| good
2025-10-25T17:00:00.000Z	36 \| good	1.381 \| good	5.459 \| good	38.713 \| good	0.669 \| good	4.518 \| good	0.16 \| good
2025-10-25T18:00:00.000Z	38 \| good	1.244 \| good	4.976 \| good	40.831 \| good	0.794 \| good	3.294 \| good	0.134 \| good
2025-10-25T19:00:00.000Z	40 \| good	1.64 \| good	6.786 \| good	42.942 \| good	0.756 \| good	2.863 \| good	0.127 \| good
2025-10-25T20:00:00.000Z	42 \| good	1.628 \| good	6.786 \| good	45.105 \| good	0.717 \| good	2.432 \| good	0.121 \| good

Live air quality index in Boulder, Colorado today

Major air pollutants in Boulder, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Boulder, Colorado air quality forecast and history

Get reliable air quality data to drive your business

Boulder, Colorado air quality map: Stay updated on AQI near you

Air quality in nearby cities

Gunbarrel, Colorado

Superior, Colorado

Louisville, Colorado

Lafayette, Colorado

Broomfield, Colorado

Erie, Colorado

How accurate is Colorado, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is air quality information updated for Boulder, Colorado?

What time in the last 24 hours was the air quality in Boulder, Colorado at its worst?

When did Boulder, Colorado experience the best air quality in the last 24 hours?

What is the AQI in Boulder, Colorado right now?

What is the most common type of pollution in Boulder, Colorado?

What should I do in case of poor air quality in Boulder, Colorado?

What is the PM2.5 level in Boulder, Colorado at the moment?

What is the PM10 level in Boulder, Colorado at the moment?

What is the carbon monoxide (CO) level in Boulder, Colorado at the moment?

What is the sulfur dioxide (SO2) level in Boulder, Colorado at the moment?

What is the ozone (O3) level in Boulder, Colorado at the moment?

What is the nitrogen dioxide (NO2) level in Boulder, Colorado at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Boulder, Colorado at the moment?

What is the PM₁₀ level in Boulder, Colorado at the moment?

What is the sulfur dioxide (SO₂) level in Boulder, Colorado at the moment?

What is the ozone (O₃) level in Boulder, Colorado at the moment?

What is the nitrogen dioxide (NO₂) level in Boulder, Colorado at the moment?