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

The PM10 concentration in Boulder, Colorado is 27.074 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 0.815 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 62.232 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 11.599 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 7.114 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)

Moderate

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)

7.11 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

27.07 μg/m³

155

255

425

605+

Ozone (O₃)

62.23 ppb

201

201+

Sulfur Dioxide (SO₂)

0.81 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.60 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2026-07-21T22:00:00.000Z	140 \| sensitive	13.801 \| fine	50.029 \| good	81.636 \| moderate	0.636 \| good	4.511 \| good	0.177 \| good
2026-07-21T23:00:00.000Z	119 \| sensitive	13.285 \| fine	49.991 \| good	76.418 \| moderate	0.573 \| good	4.026 \| good	0.177 \| good
2026-07-22T00:00:00.000Z	100 \| moderate	11.991 \| good	50.935 \| good	70.052 \| fine	0.572 \| good	4.958 \| good	0.192 \| good
2026-07-22T01:00:00.000Z	84 \| moderate	10.293 \| good	47.975 \| good	65.107 \| fine	0.78 \| good	5.654 \| good	0.175 \| good
2026-07-22T02:00:00.000Z	80 \| moderate	9.097 \| good	43.941 \| good	63.798 \| fine	0.46 \| good	9.591 \| good	0.232 \| good
2026-07-22T03:00:00.000Z	67 \| moderate	7.702 \| good	32 \| good	59.872 \| fine	0.463 \| good	13.159 \| good	0.232 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	6.705 \| good	25.007 \| good	56.572 \| fine	0.489 \| good	16.862 \| good	0.265 \| good
2026-07-22T05:00:00.000Z	54 \| moderate	6.604 \| good	22.058 \| good	56.458 \| fine	0.683 \| good	11.812 \| good	0.232 \| good
2026-07-22T06:00:00.000Z	49 \| good	6.702 \| good	20.043 \| good	52.532 \| good	0.485 \| good	7.116 \| good	0.175 \| good
2026-07-22T07:00:00.000Z	49 \| good	6.695 \| good	18.016 \| good	53.132 \| good	0.56 \| good	4.911 \| good	0.16 \| good
2026-07-22T08:00:00.000Z	48 \| good	6.893 \| good	19.005 \| good	51.513 \| good	0.6 \| good	5.646 \| good	0.16 \| good
2026-07-22T09:00:00.000Z	46 \| good	6.895 \| good	19.021 \| good	49.845 \| good	0.398 \| good	6.227 \| good	0.16 \| good
2026-07-22T10:00:00.000Z	42 \| good	6.898 \| good	18.022 \| good	45.49 \| good	0.427 \| good	7.495 \| good	0.16 \| good
2026-07-22T11:00:00.000Z	44 \| good	6.9 \| good	17.015 \| good	47.886 \| good	0.574 \| good	9.603 \| good	0.188 \| good
2026-07-22T12:00:00.000Z	38 \| good	6.991 \| good	18.018 \| good	39.893 \| good	0.514 \| good	10.341 \| good	0.277 \| good
2026-07-22T13:00:00.000Z	38 \| good	6.892 \| good	19.029 \| good	40.305 \| good	0.515 \| good	11.491 \| good	0.277 \| good
2026-07-22T14:00:00.000Z	41 \| good	6.992 \| good	21.017 \| good	43.979 \| good	0.699 \| good	17.453 \| good	0.337 \| good
2026-07-22T15:00:00.000Z	43 \| good	7.296 \| good	26.111 \| good	46.368 \| good	1.095 \| good	21.526 \| good	0.337 \| good
2026-07-22T16:00:00.000Z	39 \| good	7.215 \| good	26.075 \| good	42.072 \| good	0.633 \| good	17.56 \| good	0.277 \| good
2026-07-22T17:00:00.000Z	54 \| moderate	7.593 \| good	25.231 \| good	56.1 \| fine	0.845 \| good	11.702 \| good	0.22 \| good
2026-07-22T18:00:00.000Z	77 \| moderate	7.775 \| good	25.062 \| good	63.23 \| fine	0.845 \| good	7.97 \| good	0.23 \| good
2026-07-22T19:00:00.000Z	100 \| moderate	7.906 \| good	25.025 \| good	70.083 \| fine	0.702 \| good	9.571 \| good	0.23 \| good
2026-07-22T20:00:00.000Z	93 \| moderate	8.304 \| good	27.069 \| good	68.019 \| fine	0.605 \| good	6.754 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	105 \| sensitive	8.796 \| good	34.967 \| good	72.291 \| moderate	0.644 \| good	12.484 \| good	0.292 \| good
2026-07-22T22:00:00.000Z	112 \| sensitive	8.905 \| good	37.015 \| good	74.133 \| moderate	0.663 \| good	19.874 \| good	0.319 \| good
2026-07-22T23:00:00.000Z	97 \| moderate	8.606 \| good	34.993 \| good	68.701 \| fine	0.576 \| good	11.287 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	87 \| moderate	8.707 \| good	35.931 \| good	66.458 \| fine	0.514 \| good	10.362 \| good	0.23 \| good
2026-07-23T01:00:00.000Z	64 \| moderate	8.804 \| good	31.004 \| good	59.055 \| fine	0.488 \| good	16.585 \| good	0.302 \| good
2026-07-23T02:00:00.000Z	49 \| good	7.708 \| good	23.028 \| good	52.756 \| good	0.519 \| good	19.805 \| good	0.302 \| good
2026-07-23T03:00:00.000Z	45 \| good	3.312 \| good	14.412 \| good	49.355 \| good	0.198 \| good	6.827 \| good	0.176 \| good
2026-07-23T04:00:00.000Z	42 \| good	4.612 \| good	13.066 \| good	45.416 \| good	0.573 \| good	20.741 \| good	0.272 \| good
2026-07-23T05:00:00.000Z	39 \| good	3.903 \| good	10.02 \| good	42.165 \| good	0.514 \| good	19.07 \| good	0.214 \| good
2026-07-23T06:00:00.000Z	38 \| good	3.807 \| good	10.06 \| good	40.838 \| good	0.455 \| good	12.315 \| good	0.184 \| good
2026-07-23T07:00:00.000Z	35 \| good	4.207 \| good	11.049 \| good	38.067 \| good	0.396 \| good	8.722 \| good	0.154 \| good
2026-07-23T08:00:00.000Z	32 \| good	4.4 \| good	11.031 \| good	34.747 \| good	0.454 \| good	9.445 \| good	0.184 \| good
2026-07-23T09:00:00.000Z	32 \| good	4.302 \| good	10.03 \| good	35.31 \| good	0.607 \| good	11.413 \| good	0.184 \| good
2026-07-23T10:00:00.000Z	31 \| good	4.302 \| good	11.071 \| good	32.883 \| good	0.704 \| good	12.686 \| good	0.184 \| good
2026-07-23T11:00:00.000Z	33 \| good	4.401 \| good	10.06 \| good	35.934 \| good	0.717 \| good	14.969 \| good	0.196 \| good
2026-07-23T12:00:00.000Z	30 \| good	4.508 \| good	11.083 \| good	31.605 \| good	0.548 \| good	12.116 \| good	0.215 \| good
2026-07-23T13:00:00.000Z	33 \| good	4.502 \| good	12.078 \| good	35.798 \| good	0.607 \| good	22.481 \| good	0.367 \| good
2026-07-23T14:00:00.000Z	27 \| good	4.609 \| good	15.008 \| good	29.056 \| good	0.608 \| good	15.207 \| good	0.367 \| good
2026-07-23T15:00:00.000Z	36 \| good	5.805 \| good	18.034 \| good	39.338 \| good	0.613 \| good	13.476 \| good	0.322 \| good
2026-07-23T16:00:00.000Z	38 \| good	6.804 \| good	22.043 \| good	37.241 \| good	0.797 \| good	13.535 \| good	0.275 \| good
2026-07-23T17:00:00.000Z	40 \| good	7.208 \| good	24.059 \| good	42.512 \| good	0.833 \| good	15.541 \| good	0.242 \| good
2026-07-23T18:00:00.000Z	44 \| good	7.308 \| good	22.087 \| good	47.346 \| good	0.794 \| good	11.546 \| good	0.272 \| good
2026-07-23T19:00:00.000Z	67 \| moderate	7.117 \| good	23.129 \| good	60.311 \| fine	0.816 \| good	10.844 \| good	0.191 \| good
2026-07-23T20:00:00.000Z	74 \| moderate	7.114 \| good	27.074 \| good	62.232 \| fine	0.815 \| good	11.599 \| good	0.191 \| good
2026-07-23T21:00:00.000Z	84 \| moderate	6.9 \| good	29.008 \| good	64.602 \| fine	0.73 \| good	12.669 \| good	0.226 \| good
2026-07-23T21:00:00.000Z	74 \| moderate	7.114 \| good	27.074 \| good	62.232 \| fine	0.815 \| good	11.599 \| good	0.191 \| good
2026-07-23T22:00:00.000Z	64 \| moderate	6.091 \| good	26.915 \| good	58.653 \| fine	0.174 \| good	1.209 \| good	0.112 \| good
2026-07-23T23:00:00.000Z	54 \| moderate	5.234 \| good	22.479 \| good	56.382 \| fine	0.163 \| good	1.449 \| good	0.115 \| good
2026-07-24T00:00:00.000Z	61 \| moderate	4.748 \| good	20.629 \| good	58.065 \| fine	0.151 \| good	1.513 \| good	0.115 \| good
2026-07-24T01:00:00.000Z	61 \| moderate	3.57 \| good	15.794 \| good	58.08 \| fine	0.141 \| good	1.716 \| good	0.117 \| good
2026-07-24T02:00:00.000Z	49 \| good	1.662 \| good	6.97 \| good	53.072 \| good	0.143 \| good	3.977 \| good	0.136 \| good
2026-07-24T03:00:00.000Z	46 \| good	2.864 \| good	11.572 \| good	50.132 \| good	0.159 \| good	7.543 \| good	0.164 \| good
2026-07-24T04:00:00.000Z	46 \| good	2.457 \| good	10.076 \| good	50.079 \| good	0.175 \| good	9.897 \| good	0.184 \| good
2026-07-24T05:00:00.000Z	50 \| good	1.586 \| good	6.614 \| good	54.014 \| good	0.177 \| good	11.336 \| good	0.196 \| good
2026-07-24T06:00:00.000Z	47 \| good	0.841 \| good	3.232 \| good	50.994 \| good	0.164 \| good	10.517 \| good	0.19 \| good
2026-07-24T07:00:00.000Z	45 \| good	2.538 \| good	10.099 \| good	49.089 \| good	0.145 \| good	8.86 \| good	0.176 \| good
2026-07-24T08:00:00.000Z	44 \| good	2.797 \| good	11.479 \| good	48.045 \| good	0.137 \| good	7.94 \| good	0.168 \| good
2026-07-24T09:00:00.000Z	44 \| good	2.776 \| good	11.199 \| good	47.91 \| good	0.121 \| good	7.079 \| good	0.16 \| good
2026-07-24T10:00:00.000Z	42 \| good	3.695 \| good	16.364 \| good	44.934 \| good	0.107 \| good	6.283 \| good	0.152 \| good
2026-07-24T11:00:00.000Z	37 \| good	5.419 \| good	23.026 \| good	40.32 \| good	0.093 \| good	5.677 \| good	0.146 \| good
2026-07-24T12:00:00.000Z	35 \| good	5.068 \| good	21.668 \| good	37.89 \| good	0.079 \| good	4.982 \| good	0.142 \| good
2026-07-24T13:00:00.000Z	34 \| good	5.773 \| good	25.328 \| good	36.99 \| good	0.072 \| good	3.776 \| good	0.14 \| good
2026-07-24T14:00:00.000Z	41 \| good	7.309 \| good	32.147 \| good	43.905 \| good	0.088 \| good	3.04 \| good	0.138 \| good
2026-07-24T15:00:00.000Z	49 \| good	6.652 \| good	29.572 \| good	53.446 \| good	0.119 \| good	2.113 \| good	0.13 \| good
2026-07-24T16:00:00.000Z	54 \| moderate	7.347 \| good	32.267 \| good	56.315 \| fine	0.183 \| good	1.214 \| good	0.122 \| good
2026-07-24T17:00:00.000Z	64 \| moderate	6.201 \| good	27.713 \| good	58.586 \| fine	0.187 \| good	0.689 \| good	0.117 \| good
2026-07-24T18:00:00.000Z	67 \| moderate	5.517 \| good	23.931 \| good	60.407 \| fine	0.186 \| good	0.491 \| good	0.117 \| good
2026-07-24T19:00:00.000Z	71 \| moderate	7.729 \| good	33.879 \| good	60.927 \| fine	0.185 \| good	0.429 \| good	0.118 \| good
2026-07-24T20:00:00.000Z	80 \| moderate	11.868 \| good	52.572 \| good	63.631 \| fine	0.187 \| good	0.415 \| good	0.118 \| good
2026-07-24T21:00:00.000Z	87 \| moderate	10.939 \| good	48.293 \| good	65.699 \| fine	0.187 \| good	0.455 \| good	0.118 \| good
2026-07-24T22:00:00.000Z	77 \| moderate	9.07 \| good	40.481 \| good	63.313 \| fine	0.193 \| good	0.605 \| good	0.118 \| good
2026-07-24T23:00:00.000Z	67 \| moderate	6.998 \| good	31.069 \| good	59.991 \| fine	0.203 \| good	0.91 \| good	0.12 \| good
2026-07-25T00:00:00.000Z	54 \| moderate	4.364 \| good	18.886 \| good	56.096 \| fine	0.2 \| good	1.594 \| good	0.129 \| good
2026-07-25T01:00:00.000Z	58 \| moderate	7.039 \| good	31.11 \| good	57.19 \| fine	0.209 \| good	1.938 \| good	0.131 \| good
2026-07-25T02:00:00.000Z	58 \| moderate	6.896 \| good	30.679 \| good	57.339 \| fine	0.179 \| good	3.237 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	54 \| moderate	4.83 \| good	20.789 \| good	56.201 \| fine	0.168 \| good	4.714 \| good	0.151 \| good
2026-07-25T04:00:00.000Z	51 \| moderate	3.467 \| good	15.411 \| good	54.876 \| good	0.16 \| good	5.459 \| good	0.157 \| good
2026-07-25T05:00:00.000Z	51 \| moderate	4.155 \| good	18.413 \| good	54.885 \| good	0.151 \| good	5.967 \| good	0.162 \| good
2026-07-25T06:00:00.000Z	51 \| moderate	4.295 \| good	18.404 \| good	55.282 \| fine	0.144 \| good	6.342 \| good	0.166 \| good
2026-07-25T07:00:00.000Z	54 \| moderate	4.74 \| good	20.243 \| good	55.759 \| fine	0.135 \| good	6.475 \| good	0.167 \| good
2026-07-25T08:00:00.000Z	49 \| good	4.984 \| good	21.327 \| good	53.28 \| good	0.123 \| good	6.576 \| good	0.168 \| good
2026-07-25T09:00:00.000Z	45 \| good	4.739 \| good	20.569 \| good	48.728 \| good	0.109 \| good	6.644 \| good	0.167 \| good
2026-07-25T10:00:00.000Z	43 \| good	5.357 \| good	22.884 \| good	45.946 \| good	0.104 \| good	6.637 \| good	0.166 \| good
2026-07-25T11:00:00.000Z	49 \| good	8.531 \| good	37.54 \| good	40.437 \| good	0.102 \| good	6.523 \| good	0.164 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.766 \| good	34.125 \| good	38.527 \| good	0.101 \| good	6.093 \| good	0.162 \| good
2026-07-25T13:00:00.000Z	49 \| good	8.895 \| good	39.058 \| good	39.068 \| good	0.097 \| good	4.681 \| good	0.158 \| good
2026-07-25T14:00:00.000Z	49 \| good	8.709 \| good	38.491 \| good	47.66 \| good	0.115 \| good	3.716 \| good	0.158 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	6.902 \| good	30.449 \| good	55.888 \| fine	0.143 \| good	1.859 \| good	0.137 \| good
2026-07-25T16:00:00.000Z	71 \| moderate	7.262 \| good	32.056 \| good	61.114 \| fine	0.197 \| good	1.238 \| good	0.128 \| good
2026-07-25T17:00:00.000Z	84 \| moderate	6.339 \| good	28.047 \| good	65.206 \| fine	0.258 \| good	0.925 \| good	0.125 \| good
2026-07-25T18:00:00.000Z	97 \| moderate	5.612 \| good	24.236 \| good	69.165 \| fine	0.256 \| good	0.683 \| good	0.124 \| good
2026-07-25T19:00:00.000Z	105 \| sensitive	6.061 \| good	26.739 \| good	71.604 \| moderate	0.229 \| good	0.55 \| good	0.122 \| good
2026-07-25T20:00:00.000Z	108 \| sensitive	7.192 \| good	31.771 \| good	73.154 \| moderate	0.199 \| good	0.534 \| good	0.119 \| good
2026-07-25T21:00:00.000Z	90 \| moderate	8.368 \| good	36.723 \| good	67.452 \| fine	0.176 \| good	0.699 \| good	0.117 \| good

Boulder

Get reliable air quality data to drive your business

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

0.19ppm

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 10:00:00 on 2026-07-22.

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 02:00:00 on 2026-07-23.

What is the AQI in Boulder, Colorado right now?

As of now, the AQI in Boulder, Colorado is 74, indicating Moderate conditions.

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

Boulder, Colorado air has the highest levels of O3.

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 7.114 μg/m³.

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

The PM₁₀ concentration in Boulder, Colorado is 27.074 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 0.191 ppm.

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

Currently, Boulder, Colorado has a sulfur dioxide (SO₂) concentration of 0.815 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 62.232 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 11.599 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T22:00:00.000Z	140 \| sensitive	13.801 \| fine	50.029 \| good	81.636 \| moderate	0.636 \| good	4.511 \| good	0.177 \| good
2026-07-21T23:00:00.000Z	119 \| sensitive	13.285 \| fine	49.991 \| good	76.418 \| moderate	0.573 \| good	4.026 \| good	0.177 \| good
2026-07-22T00:00:00.000Z	100 \| moderate	11.991 \| good	50.935 \| good	70.052 \| fine	0.572 \| good	4.958 \| good	0.192 \| good
2026-07-22T01:00:00.000Z	84 \| moderate	10.293 \| good	47.975 \| good	65.107 \| fine	0.78 \| good	5.654 \| good	0.175 \| good
2026-07-22T02:00:00.000Z	80 \| moderate	9.097 \| good	43.941 \| good	63.798 \| fine	0.46 \| good	9.591 \| good	0.232 \| good
2026-07-22T03:00:00.000Z	67 \| moderate	7.702 \| good	32 \| good	59.872 \| fine	0.463 \| good	13.159 \| good	0.232 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	6.705 \| good	25.007 \| good	56.572 \| fine	0.489 \| good	16.862 \| good	0.265 \| good
2026-07-22T05:00:00.000Z	54 \| moderate	6.604 \| good	22.058 \| good	56.458 \| fine	0.683 \| good	11.812 \| good	0.232 \| good
2026-07-22T06:00:00.000Z	49 \| good	6.702 \| good	20.043 \| good	52.532 \| good	0.485 \| good	7.116 \| good	0.175 \| good
2026-07-22T07:00:00.000Z	49 \| good	6.695 \| good	18.016 \| good	53.132 \| good	0.56 \| good	4.911 \| good	0.16 \| good
2026-07-22T08:00:00.000Z	48 \| good	6.893 \| good	19.005 \| good	51.513 \| good	0.6 \| good	5.646 \| good	0.16 \| good
2026-07-22T09:00:00.000Z	46 \| good	6.895 \| good	19.021 \| good	49.845 \| good	0.398 \| good	6.227 \| good	0.16 \| good
2026-07-22T10:00:00.000Z	42 \| good	6.898 \| good	18.022 \| good	45.49 \| good	0.427 \| good	7.495 \| good	0.16 \| good
2026-07-22T11:00:00.000Z	44 \| good	6.9 \| good	17.015 \| good	47.886 \| good	0.574 \| good	9.603 \| good	0.188 \| good
2026-07-22T12:00:00.000Z	38 \| good	6.991 \| good	18.018 \| good	39.893 \| good	0.514 \| good	10.341 \| good	0.277 \| good
2026-07-22T13:00:00.000Z	38 \| good	6.892 \| good	19.029 \| good	40.305 \| good	0.515 \| good	11.491 \| good	0.277 \| good
2026-07-22T14:00:00.000Z	41 \| good	6.992 \| good	21.017 \| good	43.979 \| good	0.699 \| good	17.453 \| good	0.337 \| good
2026-07-22T15:00:00.000Z	43 \| good	7.296 \| good	26.111 \| good	46.368 \| good	1.095 \| good	21.526 \| good	0.337 \| good
2026-07-22T16:00:00.000Z	39 \| good	7.215 \| good	26.075 \| good	42.072 \| good	0.633 \| good	17.56 \| good	0.277 \| good
2026-07-22T17:00:00.000Z	54 \| moderate	7.593 \| good	25.231 \| good	56.1 \| fine	0.845 \| good	11.702 \| good	0.22 \| good
2026-07-22T18:00:00.000Z	77 \| moderate	7.775 \| good	25.062 \| good	63.23 \| fine	0.845 \| good	7.97 \| good	0.23 \| good
2026-07-22T19:00:00.000Z	100 \| moderate	7.906 \| good	25.025 \| good	70.083 \| fine	0.702 \| good	9.571 \| good	0.23 \| good
2026-07-22T20:00:00.000Z	93 \| moderate	8.304 \| good	27.069 \| good	68.019 \| fine	0.605 \| good	6.754 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	105 \| sensitive	8.796 \| good	34.967 \| good	72.291 \| moderate	0.644 \| good	12.484 \| good	0.292 \| good
2026-07-22T22:00:00.000Z	112 \| sensitive	8.905 \| good	37.015 \| good	74.133 \| moderate	0.663 \| good	19.874 \| good	0.319 \| good
2026-07-22T23:00:00.000Z	97 \| moderate	8.606 \| good	34.993 \| good	68.701 \| fine	0.576 \| good	11.287 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	87 \| moderate	8.707 \| good	35.931 \| good	66.458 \| fine	0.514 \| good	10.362 \| good	0.23 \| good
2026-07-23T01:00:00.000Z	64 \| moderate	8.804 \| good	31.004 \| good	59.055 \| fine	0.488 \| good	16.585 \| good	0.302 \| good
2026-07-23T02:00:00.000Z	49 \| good	7.708 \| good	23.028 \| good	52.756 \| good	0.519 \| good	19.805 \| good	0.302 \| good
2026-07-23T03:00:00.000Z	45 \| good	3.312 \| good	14.412 \| good	49.355 \| good	0.198 \| good	6.827 \| good	0.176 \| good
2026-07-23T04:00:00.000Z	42 \| good	4.612 \| good	13.066 \| good	45.416 \| good	0.573 \| good	20.741 \| good	0.272 \| good
2026-07-23T05:00:00.000Z	39 \| good	3.903 \| good	10.02 \| good	42.165 \| good	0.514 \| good	19.07 \| good	0.214 \| good
2026-07-23T06:00:00.000Z	38 \| good	3.807 \| good	10.06 \| good	40.838 \| good	0.455 \| good	12.315 \| good	0.184 \| good
2026-07-23T07:00:00.000Z	35 \| good	4.207 \| good	11.049 \| good	38.067 \| good	0.396 \| good	8.722 \| good	0.154 \| good
2026-07-23T08:00:00.000Z	32 \| good	4.4 \| good	11.031 \| good	34.747 \| good	0.454 \| good	9.445 \| good	0.184 \| good
2026-07-23T09:00:00.000Z	32 \| good	4.302 \| good	10.03 \| good	35.31 \| good	0.607 \| good	11.413 \| good	0.184 \| good
2026-07-23T10:00:00.000Z	31 \| good	4.302 \| good	11.071 \| good	32.883 \| good	0.704 \| good	12.686 \| good	0.184 \| good
2026-07-23T11:00:00.000Z	33 \| good	4.401 \| good	10.06 \| good	35.934 \| good	0.717 \| good	14.969 \| good	0.196 \| good
2026-07-23T12:00:00.000Z	30 \| good	4.508 \| good	11.083 \| good	31.605 \| good	0.548 \| good	12.116 \| good	0.215 \| good
2026-07-23T13:00:00.000Z	33 \| good	4.502 \| good	12.078 \| good	35.798 \| good	0.607 \| good	22.481 \| good	0.367 \| good
2026-07-23T14:00:00.000Z	27 \| good	4.609 \| good	15.008 \| good	29.056 \| good	0.608 \| good	15.207 \| good	0.367 \| good
2026-07-23T15:00:00.000Z	36 \| good	5.805 \| good	18.034 \| good	39.338 \| good	0.613 \| good	13.476 \| good	0.322 \| good
2026-07-23T16:00:00.000Z	38 \| good	6.804 \| good	22.043 \| good	37.241 \| good	0.797 \| good	13.535 \| good	0.275 \| good
2026-07-23T17:00:00.000Z	40 \| good	7.208 \| good	24.059 \| good	42.512 \| good	0.833 \| good	15.541 \| good	0.242 \| good
2026-07-23T18:00:00.000Z	44 \| good	7.308 \| good	22.087 \| good	47.346 \| good	0.794 \| good	11.546 \| good	0.272 \| good
2026-07-23T19:00:00.000Z	67 \| moderate	7.117 \| good	23.129 \| good	60.311 \| fine	0.816 \| good	10.844 \| good	0.191 \| good
2026-07-23T20:00:00.000Z	74 \| moderate	7.114 \| good	27.074 \| good	62.232 \| fine	0.815 \| good	11.599 \| good	0.191 \| good
2026-07-23T21:00:00.000Z	84 \| moderate	6.9 \| good	29.008 \| good	64.602 \| fine	0.73 \| good	12.669 \| good	0.226 \| good
2026-07-23T21:00:00.000Z	74 \| moderate	7.114 \| good	27.074 \| good	62.232 \| fine	0.815 \| good	11.599 \| good	0.191 \| good
2026-07-23T22:00:00.000Z	64 \| moderate	6.091 \| good	26.915 \| good	58.653 \| fine	0.174 \| good	1.209 \| good	0.112 \| good
2026-07-23T23:00:00.000Z	54 \| moderate	5.234 \| good	22.479 \| good	56.382 \| fine	0.163 \| good	1.449 \| good	0.115 \| good
2026-07-24T00:00:00.000Z	61 \| moderate	4.748 \| good	20.629 \| good	58.065 \| fine	0.151 \| good	1.513 \| good	0.115 \| good
2026-07-24T01:00:00.000Z	61 \| moderate	3.57 \| good	15.794 \| good	58.08 \| fine	0.141 \| good	1.716 \| good	0.117 \| good
2026-07-24T02:00:00.000Z	49 \| good	1.662 \| good	6.97 \| good	53.072 \| good	0.143 \| good	3.977 \| good	0.136 \| good
2026-07-24T03:00:00.000Z	46 \| good	2.864 \| good	11.572 \| good	50.132 \| good	0.159 \| good	7.543 \| good	0.164 \| good
2026-07-24T04:00:00.000Z	46 \| good	2.457 \| good	10.076 \| good	50.079 \| good	0.175 \| good	9.897 \| good	0.184 \| good
2026-07-24T05:00:00.000Z	50 \| good	1.586 \| good	6.614 \| good	54.014 \| good	0.177 \| good	11.336 \| good	0.196 \| good
2026-07-24T06:00:00.000Z	47 \| good	0.841 \| good	3.232 \| good	50.994 \| good	0.164 \| good	10.517 \| good	0.19 \| good
2026-07-24T07:00:00.000Z	45 \| good	2.538 \| good	10.099 \| good	49.089 \| good	0.145 \| good	8.86 \| good	0.176 \| good
2026-07-24T08:00:00.000Z	44 \| good	2.797 \| good	11.479 \| good	48.045 \| good	0.137 \| good	7.94 \| good	0.168 \| good
2026-07-24T09:00:00.000Z	44 \| good	2.776 \| good	11.199 \| good	47.91 \| good	0.121 \| good	7.079 \| good	0.16 \| good
2026-07-24T10:00:00.000Z	42 \| good	3.695 \| good	16.364 \| good	44.934 \| good	0.107 \| good	6.283 \| good	0.152 \| good
2026-07-24T11:00:00.000Z	37 \| good	5.419 \| good	23.026 \| good	40.32 \| good	0.093 \| good	5.677 \| good	0.146 \| good
2026-07-24T12:00:00.000Z	35 \| good	5.068 \| good	21.668 \| good	37.89 \| good	0.079 \| good	4.982 \| good	0.142 \| good
2026-07-24T13:00:00.000Z	34 \| good	5.773 \| good	25.328 \| good	36.99 \| good	0.072 \| good	3.776 \| good	0.14 \| good
2026-07-24T14:00:00.000Z	41 \| good	7.309 \| good	32.147 \| good	43.905 \| good	0.088 \| good	3.04 \| good	0.138 \| good
2026-07-24T15:00:00.000Z	49 \| good	6.652 \| good	29.572 \| good	53.446 \| good	0.119 \| good	2.113 \| good	0.13 \| good
2026-07-24T16:00:00.000Z	54 \| moderate	7.347 \| good	32.267 \| good	56.315 \| fine	0.183 \| good	1.214 \| good	0.122 \| good
2026-07-24T17:00:00.000Z	64 \| moderate	6.201 \| good	27.713 \| good	58.586 \| fine	0.187 \| good	0.689 \| good	0.117 \| good
2026-07-24T18:00:00.000Z	67 \| moderate	5.517 \| good	23.931 \| good	60.407 \| fine	0.186 \| good	0.491 \| good	0.117 \| good
2026-07-24T19:00:00.000Z	71 \| moderate	7.729 \| good	33.879 \| good	60.927 \| fine	0.185 \| good	0.429 \| good	0.118 \| good
2026-07-24T20:00:00.000Z	80 \| moderate	11.868 \| good	52.572 \| good	63.631 \| fine	0.187 \| good	0.415 \| good	0.118 \| good
2026-07-24T21:00:00.000Z	87 \| moderate	10.939 \| good	48.293 \| good	65.699 \| fine	0.187 \| good	0.455 \| good	0.118 \| good
2026-07-24T22:00:00.000Z	77 \| moderate	9.07 \| good	40.481 \| good	63.313 \| fine	0.193 \| good	0.605 \| good	0.118 \| good
2026-07-24T23:00:00.000Z	67 \| moderate	6.998 \| good	31.069 \| good	59.991 \| fine	0.203 \| good	0.91 \| good	0.12 \| good
2026-07-25T00:00:00.000Z	54 \| moderate	4.364 \| good	18.886 \| good	56.096 \| fine	0.2 \| good	1.594 \| good	0.129 \| good
2026-07-25T01:00:00.000Z	58 \| moderate	7.039 \| good	31.11 \| good	57.19 \| fine	0.209 \| good	1.938 \| good	0.131 \| good
2026-07-25T02:00:00.000Z	58 \| moderate	6.896 \| good	30.679 \| good	57.339 \| fine	0.179 \| good	3.237 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	54 \| moderate	4.83 \| good	20.789 \| good	56.201 \| fine	0.168 \| good	4.714 \| good	0.151 \| good
2026-07-25T04:00:00.000Z	51 \| moderate	3.467 \| good	15.411 \| good	54.876 \| good	0.16 \| good	5.459 \| good	0.157 \| good
2026-07-25T05:00:00.000Z	51 \| moderate	4.155 \| good	18.413 \| good	54.885 \| good	0.151 \| good	5.967 \| good	0.162 \| good
2026-07-25T06:00:00.000Z	51 \| moderate	4.295 \| good	18.404 \| good	55.282 \| fine	0.144 \| good	6.342 \| good	0.166 \| good
2026-07-25T07:00:00.000Z	54 \| moderate	4.74 \| good	20.243 \| good	55.759 \| fine	0.135 \| good	6.475 \| good	0.167 \| good
2026-07-25T08:00:00.000Z	49 \| good	4.984 \| good	21.327 \| good	53.28 \| good	0.123 \| good	6.576 \| good	0.168 \| good
2026-07-25T09:00:00.000Z	45 \| good	4.739 \| good	20.569 \| good	48.728 \| good	0.109 \| good	6.644 \| good	0.167 \| good
2026-07-25T10:00:00.000Z	43 \| good	5.357 \| good	22.884 \| good	45.946 \| good	0.104 \| good	6.637 \| good	0.166 \| good
2026-07-25T11:00:00.000Z	49 \| good	8.531 \| good	37.54 \| good	40.437 \| good	0.102 \| good	6.523 \| good	0.164 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.766 \| good	34.125 \| good	38.527 \| good	0.101 \| good	6.093 \| good	0.162 \| good
2026-07-25T13:00:00.000Z	49 \| good	8.895 \| good	39.058 \| good	39.068 \| good	0.097 \| good	4.681 \| good	0.158 \| good
2026-07-25T14:00:00.000Z	49 \| good	8.709 \| good	38.491 \| good	47.66 \| good	0.115 \| good	3.716 \| good	0.158 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	6.902 \| good	30.449 \| good	55.888 \| fine	0.143 \| good	1.859 \| good	0.137 \| good
2026-07-25T16:00:00.000Z	71 \| moderate	7.262 \| good	32.056 \| good	61.114 \| fine	0.197 \| good	1.238 \| good	0.128 \| good
2026-07-25T17:00:00.000Z	84 \| moderate	6.339 \| good	28.047 \| good	65.206 \| fine	0.258 \| good	0.925 \| good	0.125 \| good
2026-07-25T18:00:00.000Z	97 \| moderate	5.612 \| good	24.236 \| good	69.165 \| fine	0.256 \| good	0.683 \| good	0.124 \| good
2026-07-25T19:00:00.000Z	105 \| sensitive	6.061 \| good	26.739 \| good	71.604 \| moderate	0.229 \| good	0.55 \| good	0.122 \| good
2026-07-25T20:00:00.000Z	108 \| sensitive	7.192 \| good	31.771 \| good	73.154 \| moderate	0.199 \| good	0.534 \| good	0.119 \| good
2026-07-25T21:00:00.000Z	90 \| moderate	8.368 \| good	36.723 \| good	67.452 \| fine	0.176 \| good	0.699 \| good	0.117 \| 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?