What are the current PM10 levels at Longmont, Colorado?

The current PM10 levels in Longmont, Colorado are 31.993 μg/m3.

What are the current sulfur dioxide (SO2) levels at Longmont, Colorado?

The current sulfur dioxide (SO2) levels in Longmont, Colorado are 0.67 ppb.

What are the current ozone (O3) levels at Longmont, Colorado?

The current ozone (O3) levels at Longmont, Colorado is 30.173 ppm.

What are the current nitrogen dioxide (NO2) levels at Longmont, Colorado?

The current nitrogen dioxide (NO2) levels at Longmont, Colorado is 31.03 ppb.

Real-time air quality index in Longmont, Colorado today

Q: What are the current PM2.5 levels in Longmont, Colorado?

The measured PM2.5 levels in Longmont, Colorado at present are 7.099 μg/m3.

Stay updated with real-time air quality in Longmont, 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

Longmont, Colorado

Last updated: ... (Local time)

Common air pollutants in Longmont, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.10 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

31.99 μg/m³

155

255

425

605+

Ozone (O₃)

30.17 ppb

201

201+

Sulfur Dioxide (SO₂)

0.67 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

31.03 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Longmont, Colorado

Get Live Pollen Counts

Longmont, Colorado

Scroll To Air Quality Map

Track live Longmont, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T06:00:00.000Z	27 \| good	4.299 \| good	18.996 \| good	29.481 \| good	0.432 \| good	10.58 \| good	0.167 \| good
2026-01-21T07:00:00.000Z	28 \| good	4.1 \| good	17.999 \| good	29.877 \| good	0.273 \| good	14.335 \| good	0.19 \| good
2026-01-21T08:00:00.000Z	33 \| good	4.2 \| good	18.998 \| good	35.67 \| good	0.282 \| good	18.103 \| good	0.19 \| good
2026-01-21T09:00:00.000Z	33 \| good	5.699 \| good	24.993 \| good	33.633 \| good	0.377 \| good	12.553 \| good	0.211 \| good
2026-01-21T10:00:00.000Z	33 \| good	5.599 \| good	23.993 \| good	30.235 \| good	0.292 \| good	10.832 \| good	0.212 \| good
2026-01-21T11:00:00.000Z	31 \| good	5.299 \| good	22.993 \| good	33.145 \| good	0.448 \| good	15.73 \| good	0.21 \| good
2026-01-21T12:00:00.000Z	27 \| good	5.299 \| good	22.997 \| good	24.221 \| good	0.531 \| good	19.132 \| good	0.234 \| good
2026-01-21T13:00:00.000Z	27 \| good	5.499 \| good	23.997 \| good	25.22 \| good	0.574 \| good	19.32 \| good	0.322 \| good
2026-01-21T14:00:00.000Z	27 \| good	5.399 \| good	22.996 \| good	28.088 \| good	1.019 \| good	21.266 \| good	0.393 \| good
2026-01-21T15:00:00.000Z	33 \| good	6.1 \| good	26.992 \| good	24.988 \| good	1.29 \| good	24.07 \| good	0.731 \| good
2026-01-21T16:00:00.000Z	38 \| good	7.2 \| good	31.997 \| good	16.274 \| good	1.869 \| good	25.981 \| good	0.77 \| good
2026-01-21T17:00:00.000Z	49 \| good	8.599 \| good	37.997 \| good	16.408 \| good	2.111 \| good	24.855 \| good	0.556 \| good
2026-01-21T18:00:00.000Z	44 \| good	7.898 \| good	34.992 \| good	19.106 \| good	1.597 \| good	28.455 \| good	0.489 \| good
2026-01-21T19:00:00.000Z	38 \| good	7.198 \| good	31.992 \| good	24.055 \| good	1.559 \| good	23.891 \| good	0.267 \| good
2026-01-21T20:00:00.000Z	33 \| good	6.499 \| good	28.991 \| good	25.328 \| good	0.677 \| good	16.569 \| good	0.214 \| good
2026-01-21T21:00:00.000Z	27 \| good	5 \| good	22 \| good	28.751 \| good	0.397 \| good	14.953 \| good	0.187 \| good
2026-01-21T22:00:00.000Z	30 \| good	3.8 \| good	17.001 \| good	32.128 \| good	0.454 \| good	8.649 \| good	0.157 \| good
2026-01-21T23:00:00.000Z	29 \| good	3.2 \| good	14.002 \| good	30.917 \| good	0.735 \| good	11.798 \| good	0.19 \| good
2026-01-22T00:00:00.000Z	38 \| good	2.9 \| good	12.002 \| good	41.35 \| good	0.618 \| good	19.32 \| good	0.233 \| good
2026-01-22T01:00:00.000Z	31 \| good	3.1 \| good	14.003 \| good	34.122 \| good	0.605 \| good	16.088 \| good	0.302 \| good
2026-01-22T02:00:00.000Z	28 \| good	3.5 \| good	16.004 \| good	29.922 \| good	0.481 \| good	17.562 \| good	0.255 \| good
2026-01-22T03:00:00.000Z	32 \| good	3.4 \| good	15.002 \| good	34.607 \| good	0.611 \| good	10.893 \| good	0.233 \| good
2026-01-22T04:00:00.000Z	31 \| good	3.3 \| good	15.001 \| good	34.161 \| good	0.361 \| good	8.878 \| good	0.257 \| good
2026-01-22T05:00:00.000Z	31 \| good	3.3 \| good	15.002 \| good	32.573 \| good	0.349 \| good	10.99 \| good	0.266 \| good
2026-01-22T06:00:00.000Z	28 \| good	3.2 \| good	14.002 \| good	30.124 \| good	0.38 \| good	8.93 \| good	0.278 \| good
2026-01-22T07:00:00.000Z	29 \| good	3.3 \| good	15.003 \| good	30.895 \| good	0.432 \| good	7.835 \| good	0.212 \| good
2026-01-22T08:00:00.000Z	29 \| good	3.3 \| good	15.001 \| good	31.476 \| good	0.502 \| good	6.025 \| good	0.26 \| good
2026-01-22T09:00:00.000Z	20 \| good	3.3 \| good	15.001 \| good	21.732 \| good	0.525 \| good	5.885 \| good	0.26 \| good
2026-01-22T10:00:00.000Z	22 \| good	3.5 \| good	16.002 \| good	19.896 \| good	0.565 \| good	7.82 \| good	0.257 \| good
2026-01-22T11:00:00.000Z	25 \| good	3.7 \| good	16.001 \| good	26.825 \| good	0.473 \| good	11.256 \| good	0.299 \| good
2026-01-22T12:00:00.000Z	22 \| good	3.7 \| good	15.998 \| good	7.728 \| good	0.697 \| good	15.222 \| good	0.323 \| good
2026-01-22T13:00:00.000Z	22 \| good	3.8 \| good	17 \| good	16.95 \| good	0.972 \| good	14.684 \| good	0.392 \| good
2026-01-22T14:00:00.000Z	22 \| good	4.2 \| good	18.999 \| good	21.819 \| good	1.253 \| good	15.748 \| good	0.504 \| good
2026-01-22T15:00:00.000Z	27 \| good	5.1 \| good	21.998 \| good	20.76 \| good	1.874 \| good	17.102 \| good	0.596 \| good
2026-01-22T16:00:00.000Z	33 \| good	6 \| good	26.998 \| good	24.902 \| good	2.113 \| good	16.463 \| good	0.594 \| good
2026-01-22T17:00:00.000Z	27 \| good	5.1 \| good	22.003 \| good	24.765 \| good	1.831 \| good	14.54 \| good	0.503 \| good
2026-01-22T18:00:00.000Z	26 \| good	4.3 \| good	19 \| good	27.914 \| good	0.637 \| good	8.043 \| good	0.304 \| good
2026-01-22T19:00:00.000Z	24 \| good	3.9 \| good	17.001 \| good	26.198 \| good	0.614 \| good	8.899 \| good	0.257 \| good
2026-01-22T20:00:00.000Z	31 \| good	3.5 \| good	16.001 \| good	32.755 \| good	0.611 \| good	8.66 \| good	0.257 \| good
2026-01-22T21:00:00.000Z	37 \| good	3.301 \| good	15.002 \| good	40.177 \| good	0.602 \| good	11.729 \| good	0.214 \| good
2026-01-22T22:00:00.000Z	36 \| good	3.2 \| good	14.002 \| good	39.35 \| good	0.455 \| good	10.96 \| good	0.19 \| good
2026-01-22T23:00:00.000Z	35 \| good	3.2 \| good	14.001 \| good	37.819 \| good	0.5 \| good	11.05 \| good	0.19 \| good
2026-01-23T00:00:00.000Z	34 \| good	4 \| good	17.999 \| good	37.332 \| good	0.411 \| good	11.7 \| good	0.214 \| good
2026-01-23T01:00:00.000Z	34 \| good	4.5 \| good	20.014 \| good	36.95 \| good	0.487 \| good	13.166 \| good	0.236 \| good
2026-01-23T02:00:00.000Z	28 \| good	5.499 \| good	24 \| good	30.402 \| good	0.653 \| good	17.63 \| good	0.214 \| good
2026-01-23T03:00:00.000Z	33 \| good	5.999 \| good	26.998 \| good	30.383 \| good	0.644 \| good	24.135 \| good	0.283 \| good
2026-01-23T04:00:00.000Z	38 \| good	7.099 \| good	31.993 \| good	30.173 \| good	0.67 \| good	31.03 \| good	0.328 \| good
2026-01-23T05:00:00.000Z	38 \| good	7.099 \| good	31.993 \| good	30.173 \| good	0.67 \| good	31.03 \| good	0.328 \| good
2026-01-23T06:00:00.000Z	33 \| good	5.767 \| good	25.213 \| good	27.159 \| good	1.277 \| good	16.435 \| good	0.256 \| good
2026-01-23T07:00:00.000Z	38 \| good	6.898 \| good	30.636 \| good	24.612 \| good	1.121 \| good	14.824 \| good	0.243 \| good
2026-01-23T08:00:00.000Z	44 \| good	8.261 \| good	35.935 \| good	24.659 \| good	0.965 \| good	13.212 \| good	0.23 \| good
2026-01-23T09:00:00.000Z	44 \| good	7.539 \| good	32.95 \| good	21.425 \| good	0.809 \| good	11.601 \| good	0.217 \| good
2026-01-23T10:00:00.000Z	44 \| good	8.07 \| good	35.379 \| good	20.567 \| good	0.729 \| good	10.306 \| good	0.208 \| good
2026-01-23T11:00:00.000Z	49 \| good	9.132 \| good	40.339 \| good	23.444 \| good	0.649 \| good	9.01 \| good	0.198 \| good
2026-01-23T12:00:00.000Z	52 \| moderate	9.877 \| good	43.982 \| good	25.011 \| good	0.568 \| good	7.714 \| good	0.189 \| good
2026-01-23T13:00:00.000Z	49 \| good	8.809 \| good	39.196 \| good	22.645 \| good	0.586 \| good	7.8 \| good	0.196 \| good
2026-01-23T14:00:00.000Z	49 \| good	9.274 \| good	40.909 \| good	21.808 \| good	0.604 \| good	7.885 \| good	0.202 \| good
2026-01-23T15:00:00.000Z	54 \| moderate	10.721 \| good	47.339 \| good	25.032 \| good	0.621 \| good	7.971 \| good	0.209 \| good
2026-01-23T16:00:00.000Z	56 \| moderate	12.114 \| fine	54.288 \| good	27.012 \| good	0.655 \| good	6.627 \| good	0.202 \| good
2026-01-23T17:00:00.000Z	56 \| moderate	11.847 \| good	52.912 \| good	26.519 \| good	0.689 \| good	5.283 \| good	0.196 \| good
2026-01-23T18:00:00.000Z	56 \| moderate	11.898 \| good	52.912 \| good	29.061 \| good	0.723 \| good	3.94 \| good	0.189 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	11.697 \| good	52.5 \| good	28.573 \| good	0.724 \| good	3.645 \| good	0.187 \| good
2026-01-23T20:00:00.000Z	52 \| moderate	10.097 \| good	44.925 \| good	29.028 \| good	0.725 \| good	3.351 \| good	0.185 \| good
2026-01-23T21:00:00.000Z	52 \| moderate	10.153 \| good	44.932 \| good	30.383 \| good	0.726 \| good	3.056 \| good	0.184 \| good
2026-01-23T22:00:00.000Z	52 \| moderate	10.438 \| good	45.977 \| good	28.017 \| good	0.711 \| good	3.576 \| good	0.183 \| good
2026-01-23T23:00:00.000Z	33 \| good	6.129 \| good	27.381 \| good	27.714 \| good	0.696 \| good	4.096 \| good	0.182 \| good
2026-01-24T00:00:00.000Z	58 \| moderate	13.227 \| fine	59.951 \| fine	26.004 \| good	0.68 \| good	4.617 \| good	0.181 \| good
2026-01-24T01:00:00.000Z	60 \| moderate	14.273 \| fine	64.223 \| fine	24.685 \| good	0.667 \| good	4.982 \| good	0.18 \| good
2026-01-24T02:00:00.000Z	54 \| moderate	10.841 \| good	47.93 \| good	27.045 \| good	0.654 \| good	5.347 \| good	0.18 \| good
2026-01-24T03:00:00.000Z	56 \| moderate	11.629 \| good	52.48 \| good	27.997 \| good	0.64 \| good	5.712 \| good	0.179 \| good
2026-01-24T04:00:00.000Z	52 \| moderate	9.979 \| good	44.3 \| good	27.116 \| good	0.602 \| good	5.457 \| good	0.176 \| good
2026-01-24T05:00:00.000Z	49 \| good	9.01 \| good	39.753 \| good	28.131 \| good	0.564 \| good	5.202 \| good	0.174 \| good
2026-01-24T06:00:00.000Z	49 \| good	9.126 \| good	40.169 \| good	28.921 \| good	0.526 \| good	4.947 \| good	0.171 \| good
2026-01-24T07:00:00.000Z	52 \| moderate	9.513 \| good	41.832 \| good	26.327 \| good	0.493 \| good	4.642 \| good	0.168 \| good
2026-01-24T08:00:00.000Z	38 \| good	6.858 \| good	30.252 \| good	27.161 \| good	0.461 \| good	4.338 \| good	0.166 \| good
2026-01-24T09:00:00.000Z	27 \| good	4.948 \| good	21.341 \| good	24.584 \| good	0.429 \| good	4.033 \| good	0.164 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.167 \| good	22.385 \| good	23.286 \| good	0.44 \| good	4.034 \| good	0.163 \| good
2026-01-24T11:00:00.000Z	27 \| good	5.003 \| good	21.323 \| good	22.693 \| good	0.452 \| good	4.035 \| good	0.162 \| good
2026-01-24T12:00:00.000Z	33 \| good	5.914 \| good	26.739 \| good	23.274 \| good	0.463 \| good	4.035 \| good	0.161 \| good
2026-01-24T13:00:00.000Z	33 \| good	6.173 \| good	27.323 \| good	21.969 \| good	0.503 \| good	4.482 \| good	0.165 \| good
2026-01-24T14:00:00.000Z	44 \| good	8.338 \| good	36.303 \| good	19.932 \| good	0.544 \| good	4.929 \| good	0.169 \| good
2026-01-24T15:00:00.000Z	49 \| good	8.789 \| good	38.925 \| good	20.609 \| good	0.584 \| good	5.376 \| good	0.172 \| good
2026-01-24T16:00:00.000Z	52 \| moderate	9.993 \| good	44.636 \| good	21.717 \| good	0.65 \| good	4.707 \| good	0.173 \| good
2026-01-24T17:00:00.000Z	54 \| moderate	10.758 \| good	47.382 \| good	23.073 \| good	0.715 \| good	4.038 \| good	0.173 \| good
2026-01-24T18:00:00.000Z	56 \| moderate	12.03 \| good	53.604 \| good	24.975 \| good	0.781 \| good	3.369 \| good	0.173 \| good
2026-01-24T19:00:00.000Z	54 \| moderate	10.916 \| good	48.206 \| good	26.97 \| good	0.804 \| good	3.342 \| good	0.171 \| good
2026-01-24T20:00:00.000Z	52 \| moderate	10.183 \| good	45.394 \| good	28.702 \| good	0.827 \| good	3.315 \| good	0.169 \| good
2026-01-24T21:00:00.000Z	52 \| moderate	9.797 \| good	43.819 \| good	30.68 \| good	0.849 \| good	3.288 \| good	0.167 \| good
2026-01-24T22:00:00.000Z	52 \| moderate	9.981 \| good	44.341 \| good	27.701 \| good	0.83 \| good	4.31 \| good	0.168 \| good
2026-01-24T23:00:00.000Z	54 \| moderate	10.966 \| good	48.389 \| good	27.018 \| good	0.811 \| good	5.333 \| good	0.169 \| good
2026-01-25T00:00:00.000Z	27 \| good	5.401 \| good	5.495 \| good	28.43 \| good	0.799 \| good	6.397 \| good	0.169 \| good
2026-01-25T01:00:00.000Z	66 \| moderate	16.604 \| fine	74.112 \| fine	24.284 \| good	0.794 \| good	7.628 \| good	0.178 \| good
2026-01-25T02:00:00.000Z	62 \| moderate	14.632 \| fine	65.563 \| fine	21.275 \| good	0.797 \| good	8.9 \| good	0.186 \| good
2026-01-25T03:00:00.000Z	62 \| moderate	15.218 \| fine	68.06 \| fine	21.814 \| good	0.799 \| good	10.173 \| good	0.195 \| good
2026-01-25T04:00:00.000Z	58 \| moderate	12.718 \| fine	57.441 \| fine	19.975 \| good	0.801 \| good	11.294 \| good	0.201 \| good
2026-01-25T05:00:00.000Z	60 \| moderate	13.767 \| fine	61.289 \| fine	18.712 \| good	0.802 \| good	12.416 \| good	0.208 \| good

Longmont

Empower business decisions with accurate air quality data

Longmont, Colorado air quality map: Real-time AQI near you

0.38ppm

How accurate is Colorado, USA air quality data?

Air quality measurements for Colorado, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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

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Frequently asked questions

How frequently is the air quality data for Longmont, Colorado updated?

Air quality data for Longmont, Colorado is updated on an hourly basis.

When did Longmont, Colorado experience the worst air quality in the last 24 hours?

The worst air quality in Longmont, Colorado was recorded at 04:00:00 on 2026-01-23.

When did Longmont, Colorado have its best air quality in the last 24 hours?

The best air quality in Longmont, Colorado was recorded at 09:00:00 on 2026-01-22.

What is the real-time air quality index for Longmont, Colorado?

The real-time air quality index in Longmont, Colorado is 38, currently categorized as Good.

Which pollutant is found most often in Longmont, Colorado?

The most common pollutant in Longmont, Colorado is PM2.5.

What can I do if the air quality in Longmont, Colorado is poor?

If the air quality in Longmont, Colorado is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Longmont, Colorado?

The measured PM_2.5 levels in Longmont, Colorado at present are 7.099 μg/m³.

What are the current PM₁₀ levels at Longmont, Colorado?

The current PM₁₀ levels in Longmont, Colorado are 31.993 μg/m³.

What are the current carbon monoxide (CO) levels at Longmont, Colorado?

The current carbon monoxide (CO) level in Longmont, Colorado is 0.328 ppm.

What are the current sulfur dioxide (SO₂) levels at Longmont, Colorado?

The current sulfur dioxide (SO₂) levels in Longmont, Colorado are 0.67 ppb.

What are the current ozone (O₃) levels at Longmont, Colorado?

The current ozone (O₃) levels at Longmont, Colorado is 30.173 ppm.

What are the current nitrogen dioxide (NO₂) levels at Longmont, Colorado?

The current nitrogen dioxide (NO₂) levels at Longmont, Colorado is 31.03 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T06:00:00.000Z	27 \| good	4.299 \| good	18.996 \| good	29.481 \| good	0.432 \| good	10.58 \| good	0.167 \| good
2026-01-21T07:00:00.000Z	28 \| good	4.1 \| good	17.999 \| good	29.877 \| good	0.273 \| good	14.335 \| good	0.19 \| good
2026-01-21T08:00:00.000Z	33 \| good	4.2 \| good	18.998 \| good	35.67 \| good	0.282 \| good	18.103 \| good	0.19 \| good
2026-01-21T09:00:00.000Z	33 \| good	5.699 \| good	24.993 \| good	33.633 \| good	0.377 \| good	12.553 \| good	0.211 \| good
2026-01-21T10:00:00.000Z	33 \| good	5.599 \| good	23.993 \| good	30.235 \| good	0.292 \| good	10.832 \| good	0.212 \| good
2026-01-21T11:00:00.000Z	31 \| good	5.299 \| good	22.993 \| good	33.145 \| good	0.448 \| good	15.73 \| good	0.21 \| good
2026-01-21T12:00:00.000Z	27 \| good	5.299 \| good	22.997 \| good	24.221 \| good	0.531 \| good	19.132 \| good	0.234 \| good
2026-01-21T13:00:00.000Z	27 \| good	5.499 \| good	23.997 \| good	25.22 \| good	0.574 \| good	19.32 \| good	0.322 \| good
2026-01-21T14:00:00.000Z	27 \| good	5.399 \| good	22.996 \| good	28.088 \| good	1.019 \| good	21.266 \| good	0.393 \| good
2026-01-21T15:00:00.000Z	33 \| good	6.1 \| good	26.992 \| good	24.988 \| good	1.29 \| good	24.07 \| good	0.731 \| good
2026-01-21T16:00:00.000Z	38 \| good	7.2 \| good	31.997 \| good	16.274 \| good	1.869 \| good	25.981 \| good	0.77 \| good
2026-01-21T17:00:00.000Z	49 \| good	8.599 \| good	37.997 \| good	16.408 \| good	2.111 \| good	24.855 \| good	0.556 \| good
2026-01-21T18:00:00.000Z	44 \| good	7.898 \| good	34.992 \| good	19.106 \| good	1.597 \| good	28.455 \| good	0.489 \| good
2026-01-21T19:00:00.000Z	38 \| good	7.198 \| good	31.992 \| good	24.055 \| good	1.559 \| good	23.891 \| good	0.267 \| good
2026-01-21T20:00:00.000Z	33 \| good	6.499 \| good	28.991 \| good	25.328 \| good	0.677 \| good	16.569 \| good	0.214 \| good
2026-01-21T21:00:00.000Z	27 \| good	5 \| good	22 \| good	28.751 \| good	0.397 \| good	14.953 \| good	0.187 \| good
2026-01-21T22:00:00.000Z	30 \| good	3.8 \| good	17.001 \| good	32.128 \| good	0.454 \| good	8.649 \| good	0.157 \| good
2026-01-21T23:00:00.000Z	29 \| good	3.2 \| good	14.002 \| good	30.917 \| good	0.735 \| good	11.798 \| good	0.19 \| good
2026-01-22T00:00:00.000Z	38 \| good	2.9 \| good	12.002 \| good	41.35 \| good	0.618 \| good	19.32 \| good	0.233 \| good
2026-01-22T01:00:00.000Z	31 \| good	3.1 \| good	14.003 \| good	34.122 \| good	0.605 \| good	16.088 \| good	0.302 \| good
2026-01-22T02:00:00.000Z	28 \| good	3.5 \| good	16.004 \| good	29.922 \| good	0.481 \| good	17.562 \| good	0.255 \| good
2026-01-22T03:00:00.000Z	32 \| good	3.4 \| good	15.002 \| good	34.607 \| good	0.611 \| good	10.893 \| good	0.233 \| good
2026-01-22T04:00:00.000Z	31 \| good	3.3 \| good	15.001 \| good	34.161 \| good	0.361 \| good	8.878 \| good	0.257 \| good
2026-01-22T05:00:00.000Z	31 \| good	3.3 \| good	15.002 \| good	32.573 \| good	0.349 \| good	10.99 \| good	0.266 \| good
2026-01-22T06:00:00.000Z	28 \| good	3.2 \| good	14.002 \| good	30.124 \| good	0.38 \| good	8.93 \| good	0.278 \| good
2026-01-22T07:00:00.000Z	29 \| good	3.3 \| good	15.003 \| good	30.895 \| good	0.432 \| good	7.835 \| good	0.212 \| good
2026-01-22T08:00:00.000Z	29 \| good	3.3 \| good	15.001 \| good	31.476 \| good	0.502 \| good	6.025 \| good	0.26 \| good
2026-01-22T09:00:00.000Z	20 \| good	3.3 \| good	15.001 \| good	21.732 \| good	0.525 \| good	5.885 \| good	0.26 \| good
2026-01-22T10:00:00.000Z	22 \| good	3.5 \| good	16.002 \| good	19.896 \| good	0.565 \| good	7.82 \| good	0.257 \| good
2026-01-22T11:00:00.000Z	25 \| good	3.7 \| good	16.001 \| good	26.825 \| good	0.473 \| good	11.256 \| good	0.299 \| good
2026-01-22T12:00:00.000Z	22 \| good	3.7 \| good	15.998 \| good	7.728 \| good	0.697 \| good	15.222 \| good	0.323 \| good
2026-01-22T13:00:00.000Z	22 \| good	3.8 \| good	17 \| good	16.95 \| good	0.972 \| good	14.684 \| good	0.392 \| good
2026-01-22T14:00:00.000Z	22 \| good	4.2 \| good	18.999 \| good	21.819 \| good	1.253 \| good	15.748 \| good	0.504 \| good
2026-01-22T15:00:00.000Z	27 \| good	5.1 \| good	21.998 \| good	20.76 \| good	1.874 \| good	17.102 \| good	0.596 \| good
2026-01-22T16:00:00.000Z	33 \| good	6 \| good	26.998 \| good	24.902 \| good	2.113 \| good	16.463 \| good	0.594 \| good
2026-01-22T17:00:00.000Z	27 \| good	5.1 \| good	22.003 \| good	24.765 \| good	1.831 \| good	14.54 \| good	0.503 \| good
2026-01-22T18:00:00.000Z	26 \| good	4.3 \| good	19 \| good	27.914 \| good	0.637 \| good	8.043 \| good	0.304 \| good
2026-01-22T19:00:00.000Z	24 \| good	3.9 \| good	17.001 \| good	26.198 \| good	0.614 \| good	8.899 \| good	0.257 \| good
2026-01-22T20:00:00.000Z	31 \| good	3.5 \| good	16.001 \| good	32.755 \| good	0.611 \| good	8.66 \| good	0.257 \| good
2026-01-22T21:00:00.000Z	37 \| good	3.301 \| good	15.002 \| good	40.177 \| good	0.602 \| good	11.729 \| good	0.214 \| good
2026-01-22T22:00:00.000Z	36 \| good	3.2 \| good	14.002 \| good	39.35 \| good	0.455 \| good	10.96 \| good	0.19 \| good
2026-01-22T23:00:00.000Z	35 \| good	3.2 \| good	14.001 \| good	37.819 \| good	0.5 \| good	11.05 \| good	0.19 \| good
2026-01-23T00:00:00.000Z	34 \| good	4 \| good	17.999 \| good	37.332 \| good	0.411 \| good	11.7 \| good	0.214 \| good
2026-01-23T01:00:00.000Z	34 \| good	4.5 \| good	20.014 \| good	36.95 \| good	0.487 \| good	13.166 \| good	0.236 \| good
2026-01-23T02:00:00.000Z	28 \| good	5.499 \| good	24 \| good	30.402 \| good	0.653 \| good	17.63 \| good	0.214 \| good
2026-01-23T03:00:00.000Z	33 \| good	5.999 \| good	26.998 \| good	30.383 \| good	0.644 \| good	24.135 \| good	0.283 \| good
2026-01-23T04:00:00.000Z	38 \| good	7.099 \| good	31.993 \| good	30.173 \| good	0.67 \| good	31.03 \| good	0.328 \| good
2026-01-23T05:00:00.000Z	38 \| good	7.099 \| good	31.993 \| good	30.173 \| good	0.67 \| good	31.03 \| good	0.328 \| good
2026-01-23T06:00:00.000Z	33 \| good	5.767 \| good	25.213 \| good	27.159 \| good	1.277 \| good	16.435 \| good	0.256 \| good
2026-01-23T07:00:00.000Z	38 \| good	6.898 \| good	30.636 \| good	24.612 \| good	1.121 \| good	14.824 \| good	0.243 \| good
2026-01-23T08:00:00.000Z	44 \| good	8.261 \| good	35.935 \| good	24.659 \| good	0.965 \| good	13.212 \| good	0.23 \| good
2026-01-23T09:00:00.000Z	44 \| good	7.539 \| good	32.95 \| good	21.425 \| good	0.809 \| good	11.601 \| good	0.217 \| good
2026-01-23T10:00:00.000Z	44 \| good	8.07 \| good	35.379 \| good	20.567 \| good	0.729 \| good	10.306 \| good	0.208 \| good
2026-01-23T11:00:00.000Z	49 \| good	9.132 \| good	40.339 \| good	23.444 \| good	0.649 \| good	9.01 \| good	0.198 \| good
2026-01-23T12:00:00.000Z	52 \| moderate	9.877 \| good	43.982 \| good	25.011 \| good	0.568 \| good	7.714 \| good	0.189 \| good
2026-01-23T13:00:00.000Z	49 \| good	8.809 \| good	39.196 \| good	22.645 \| good	0.586 \| good	7.8 \| good	0.196 \| good
2026-01-23T14:00:00.000Z	49 \| good	9.274 \| good	40.909 \| good	21.808 \| good	0.604 \| good	7.885 \| good	0.202 \| good
2026-01-23T15:00:00.000Z	54 \| moderate	10.721 \| good	47.339 \| good	25.032 \| good	0.621 \| good	7.971 \| good	0.209 \| good
2026-01-23T16:00:00.000Z	56 \| moderate	12.114 \| fine	54.288 \| good	27.012 \| good	0.655 \| good	6.627 \| good	0.202 \| good
2026-01-23T17:00:00.000Z	56 \| moderate	11.847 \| good	52.912 \| good	26.519 \| good	0.689 \| good	5.283 \| good	0.196 \| good
2026-01-23T18:00:00.000Z	56 \| moderate	11.898 \| good	52.912 \| good	29.061 \| good	0.723 \| good	3.94 \| good	0.189 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	11.697 \| good	52.5 \| good	28.573 \| good	0.724 \| good	3.645 \| good	0.187 \| good
2026-01-23T20:00:00.000Z	52 \| moderate	10.097 \| good	44.925 \| good	29.028 \| good	0.725 \| good	3.351 \| good	0.185 \| good
2026-01-23T21:00:00.000Z	52 \| moderate	10.153 \| good	44.932 \| good	30.383 \| good	0.726 \| good	3.056 \| good	0.184 \| good
2026-01-23T22:00:00.000Z	52 \| moderate	10.438 \| good	45.977 \| good	28.017 \| good	0.711 \| good	3.576 \| good	0.183 \| good
2026-01-23T23:00:00.000Z	33 \| good	6.129 \| good	27.381 \| good	27.714 \| good	0.696 \| good	4.096 \| good	0.182 \| good
2026-01-24T00:00:00.000Z	58 \| moderate	13.227 \| fine	59.951 \| fine	26.004 \| good	0.68 \| good	4.617 \| good	0.181 \| good
2026-01-24T01:00:00.000Z	60 \| moderate	14.273 \| fine	64.223 \| fine	24.685 \| good	0.667 \| good	4.982 \| good	0.18 \| good
2026-01-24T02:00:00.000Z	54 \| moderate	10.841 \| good	47.93 \| good	27.045 \| good	0.654 \| good	5.347 \| good	0.18 \| good
2026-01-24T03:00:00.000Z	56 \| moderate	11.629 \| good	52.48 \| good	27.997 \| good	0.64 \| good	5.712 \| good	0.179 \| good
2026-01-24T04:00:00.000Z	52 \| moderate	9.979 \| good	44.3 \| good	27.116 \| good	0.602 \| good	5.457 \| good	0.176 \| good
2026-01-24T05:00:00.000Z	49 \| good	9.01 \| good	39.753 \| good	28.131 \| good	0.564 \| good	5.202 \| good	0.174 \| good
2026-01-24T06:00:00.000Z	49 \| good	9.126 \| good	40.169 \| good	28.921 \| good	0.526 \| good	4.947 \| good	0.171 \| good
2026-01-24T07:00:00.000Z	52 \| moderate	9.513 \| good	41.832 \| good	26.327 \| good	0.493 \| good	4.642 \| good	0.168 \| good
2026-01-24T08:00:00.000Z	38 \| good	6.858 \| good	30.252 \| good	27.161 \| good	0.461 \| good	4.338 \| good	0.166 \| good
2026-01-24T09:00:00.000Z	27 \| good	4.948 \| good	21.341 \| good	24.584 \| good	0.429 \| good	4.033 \| good	0.164 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.167 \| good	22.385 \| good	23.286 \| good	0.44 \| good	4.034 \| good	0.163 \| good
2026-01-24T11:00:00.000Z	27 \| good	5.003 \| good	21.323 \| good	22.693 \| good	0.452 \| good	4.035 \| good	0.162 \| good
2026-01-24T12:00:00.000Z	33 \| good	5.914 \| good	26.739 \| good	23.274 \| good	0.463 \| good	4.035 \| good	0.161 \| good
2026-01-24T13:00:00.000Z	33 \| good	6.173 \| good	27.323 \| good	21.969 \| good	0.503 \| good	4.482 \| good	0.165 \| good
2026-01-24T14:00:00.000Z	44 \| good	8.338 \| good	36.303 \| good	19.932 \| good	0.544 \| good	4.929 \| good	0.169 \| good
2026-01-24T15:00:00.000Z	49 \| good	8.789 \| good	38.925 \| good	20.609 \| good	0.584 \| good	5.376 \| good	0.172 \| good
2026-01-24T16:00:00.000Z	52 \| moderate	9.993 \| good	44.636 \| good	21.717 \| good	0.65 \| good	4.707 \| good	0.173 \| good
2026-01-24T17:00:00.000Z	54 \| moderate	10.758 \| good	47.382 \| good	23.073 \| good	0.715 \| good	4.038 \| good	0.173 \| good
2026-01-24T18:00:00.000Z	56 \| moderate	12.03 \| good	53.604 \| good	24.975 \| good	0.781 \| good	3.369 \| good	0.173 \| good
2026-01-24T19:00:00.000Z	54 \| moderate	10.916 \| good	48.206 \| good	26.97 \| good	0.804 \| good	3.342 \| good	0.171 \| good
2026-01-24T20:00:00.000Z	52 \| moderate	10.183 \| good	45.394 \| good	28.702 \| good	0.827 \| good	3.315 \| good	0.169 \| good
2026-01-24T21:00:00.000Z	52 \| moderate	9.797 \| good	43.819 \| good	30.68 \| good	0.849 \| good	3.288 \| good	0.167 \| good
2026-01-24T22:00:00.000Z	52 \| moderate	9.981 \| good	44.341 \| good	27.701 \| good	0.83 \| good	4.31 \| good	0.168 \| good
2026-01-24T23:00:00.000Z	54 \| moderate	10.966 \| good	48.389 \| good	27.018 \| good	0.811 \| good	5.333 \| good	0.169 \| good
2026-01-25T00:00:00.000Z	27 \| good	5.401 \| good	5.495 \| good	28.43 \| good	0.799 \| good	6.397 \| good	0.169 \| good
2026-01-25T01:00:00.000Z	66 \| moderate	16.604 \| fine	74.112 \| fine	24.284 \| good	0.794 \| good	7.628 \| good	0.178 \| good
2026-01-25T02:00:00.000Z	62 \| moderate	14.632 \| fine	65.563 \| fine	21.275 \| good	0.797 \| good	8.9 \| good	0.186 \| good
2026-01-25T03:00:00.000Z	62 \| moderate	15.218 \| fine	68.06 \| fine	21.814 \| good	0.799 \| good	10.173 \| good	0.195 \| good
2026-01-25T04:00:00.000Z	58 \| moderate	12.718 \| fine	57.441 \| fine	19.975 \| good	0.801 \| good	11.294 \| good	0.201 \| good
2026-01-25T05:00:00.000Z	60 \| moderate	13.767 \| fine	61.289 \| fine	18.712 \| good	0.802 \| good	12.416 \| good	0.208 \| good

Real-time air quality index in Longmont, Colorado today

Common air pollutants in Longmont, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Longmont, Colorado air quality forecast and history

Empower business decisions with accurate air quality data

Longmont, Colorado air quality map: Real-time AQI near you

Air quality in nearby cities

Gunbarrel, Colorado

Erie, Colorado

Firestone, Colorado

Berthoud, Colorado

Frederick, Colorado

Lafayette, Colorado

How accurate is Colorado, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Longmont, Colorado updated?

When did Longmont, Colorado experience the worst air quality in the last 24 hours?

When did Longmont, Colorado have its best air quality in the last 24 hours?

What is the real-time air quality index for Longmont, Colorado?

Which pollutant is found most often in Longmont, Colorado?

What can I do if the air quality in Longmont, Colorado is poor?

What are the current PM2.5 levels in Longmont, Colorado?

What are the current PM10 levels at Longmont, Colorado?

What are the current carbon monoxide (CO) levels at Longmont, Colorado?

What are the current sulfur dioxide (SO2) levels at Longmont, Colorado?

What are the current ozone (O3) levels at Longmont, Colorado?

What are the current nitrogen dioxide (NO2) levels at Longmont, Colorado?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Longmont, Colorado?

What are the current PM₁₀ levels at Longmont, Colorado?

What are the current sulfur dioxide (SO₂) levels at Longmont, Colorado?

What are the current ozone (O₃) levels at Longmont, Colorado?

What are the current nitrogen dioxide (NO₂) levels at Longmont, Colorado?