What are the current PM10 levels at Longmont, Colorado?

The current PM10 levels in Longmont, Colorado are 15.009 μg/m3.

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

The current sulfur dioxide (SO2) levels in Longmont, Colorado are 0.646 ppb.

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

The current ozone (O3) levels at Longmont, Colorado is 40.1 ppm.

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

The current nitrogen dioxide (NO2) levels at Longmont, Colorado is 6.578 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 3.4 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)

3.40 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.01 μg/m³

155

255

425

605+

Ozone (O₃)

40.10 ppb

201

201+

Sulfur Dioxide (SO₂)

0.65 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.58 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 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
2026-06-06T13:00:00.000Z	44 \| good	7.999 \| good	34.996 \| good	33.741 \| good	0.619 \| good	8.598 \| good	0.209 \| good
2026-06-06T14:00:00.000Z	44 \| good	8.099 \| good	35.994 \| good	36.572 \| good	0.657 \| good	8.205 \| good	0.167 \| good
2026-06-06T15:00:00.000Z	44 \| good	8.2 \| good	36 \| good	39.859 \| good	0.943 \| good	11.353 \| good	0.19 \| good
2026-06-06T16:00:00.000Z	44 \| good	8.2 \| good	35.996 \| good	47.728 \| good	1.098 \| good	7.94 \| good	0.188 \| good
2026-06-06T17:00:00.000Z	51 \| moderate	8.3 \| good	36.994 \| good	55.111 \| fine	0.936 \| good	7.249 \| good	0.191 \| good
2026-06-06T18:00:00.000Z	51 \| moderate	8.5 \| good	36.996 \| good	54.764 \| good	1.048 \| good	6.431 \| good	0.233 \| good
2026-06-06T19:00:00.000Z	67 \| moderate	8.599 \| good	37.993 \| good	60.081 \| fine	0.801 \| good	7.636 \| good	0.21 \| good
2026-06-06T20:00:00.000Z	77 \| moderate	7.998 \| good	34.994 \| good	62.742 \| fine	0.625 \| good	5.124 \| good	0.188 \| good
2026-06-06T21:00:00.000Z	77 \| moderate	6.199 \| good	27.999 \| good	62.821 \| fine	0.599 \| good	2.522 \| good	0.121 \| good
2026-06-06T22:00:00.000Z	80 \| moderate	5.299 \| good	22.999 \| good	64.162 \| fine	0.594 \| good	1.902 \| good	0.121 \| good
2026-06-06T23:00:00.000Z	74 \| moderate	5.099 \| good	21.999 \| good	61.892 \| fine	0.683 \| good	2.817 \| good	0.121 \| good
2026-06-07T00:00:00.000Z	58 \| moderate	4.899 \| good	21 \| good	57.5 \| fine	0.625 \| good	5.538 \| good	0.143 \| good
2026-06-07T01:00:00.000Z	61 \| moderate	4.599 \| good	19.996 \| good	58.052 \| fine	0.594 \| good	7.761 \| good	0.164 \| good
2026-06-07T02:00:00.000Z	51 \| moderate	4.599 \| good	19.998 \| good	54.951 \| good	0.646 \| good	9.527 \| good	0.209 \| good
2026-06-07T03:00:00.000Z	50 \| good	4.6 \| good	20.001 \| good	53.556 \| good	0.539 \| good	4.555 \| good	0.145 \| good
2026-06-07T04:00:00.000Z	48 \| good	4.899 \| good	21.004 \| good	51.566 \| good	0.667 \| good	4.797 \| good	0.143 \| good
2026-06-07T05:00:00.000Z	49 \| good	5.099 \| good	22.003 \| good	52.769 \| good	0.935 \| good	5.988 \| good	0.143 \| good
2026-06-07T06:00:00.000Z	46 \| good	4.7 \| good	21.007 \| good	49.975 \| good	0.997 \| good	8.684 \| good	0.187 \| good
2026-06-07T07:00:00.000Z	42 \| good	4.7 \| good	21.004 \| good	44.986 \| good	0.643 \| good	5.8 \| good	0.166 \| good
2026-06-07T08:00:00.000Z	37 \| good	4.7 \| good	21.011 \| good	40.41 \| good	0.594 \| good	7.084 \| good	0.145 \| good
2026-06-07T09:00:00.000Z	34 \| good	4.7 \| good	21.008 \| good	36.646 \| good	0.62 \| good	6.075 \| good	0.166 \| good
2026-06-07T10:00:00.000Z	30 \| good	4.7 \| good	21.003 \| good	32.148 \| good	0.618 \| good	7.744 \| good	0.143 \| good
2026-06-07T11:00:00.000Z	29 \| good	4.7 \| good	21.003 \| good	30.75 \| good	0.736 \| good	6.373 \| good	0.121 \| good
2026-06-07T12:00:00.000Z	32 \| good	4.799 \| good	21.002 \| good	35.427 \| good	0.568 \| good	8.144 \| good	0.145 \| good
2026-06-07T13:00:00.000Z	40 \| good	4.8 \| good	21.003 \| good	43.089 \| good	0.623 \| good	11.901 \| good	0.166 \| good
2026-06-07T14:00:00.000Z	37 \| good	5.099 \| good	22 \| good	39.694 \| good	0.776 \| good	7.225 \| good	0.19 \| good
2026-06-07T15:00:00.000Z	39 \| good	5.199 \| good	22.998 \| good	42.168 \| good	0.682 \| good	7.796 \| good	0.143 \| good
2026-06-07T16:00:00.000Z	44 \| good	5.199 \| good	22.999 \| good	47.337 \| good	1.101 \| good	7.497 \| good	0.145 \| good
2026-06-07T17:00:00.000Z	46 \| good	5.199 \| good	22.999 \| good	50.13 \| good	0.654 \| good	3.72 \| good	0.1 \| good
2026-06-07T18:00:00.000Z	49 \| good	5.199 \| good	22.998 \| good	52.642 \| good	0.627 \| good	2.283 \| good	0.1 \| good
2026-06-07T19:00:00.000Z	50 \| good	5 \| good	22.001 \| good	54.25 \| good	0.651 \| good	2.194 \| good	0.121 \| good
2026-06-07T20:00:00.000Z	58 \| moderate	4.599 \| good	20.001 \| good	57.014 \| fine	0.625 \| good	1.883 \| good	0.121 \| good
2026-06-07T21:00:00.000Z	58 \| moderate	4.3 \| good	19 \| good	56.801 \| fine	0.63 \| good	2.576 \| good	0.121 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	4.2 \| good	18.999 \| good	55.368 \| fine	0.544 \| good	3.415 \| good	0.143 \| good
2026-06-07T23:00:00.000Z	54 \| moderate	4.3 \| good	19.002 \| good	56.367 \| fine	0.594 \| good	4.746 \| good	0.188 \| good
2026-06-08T00:00:00.000Z	51 \| moderate	4 \| good	18.003 \| good	55.061 \| fine	0.571 \| good	1.625 \| good	0.209 \| good
2026-06-08T01:00:00.000Z	45 \| good	3.6 \| good	16.005 \| good	49.292 \| good	0.542 \| good	6.703 \| good	0.211 \| good
2026-06-08T02:00:00.000Z	46 \| good	3.7 \| good	16.002 \| good	49.961 \| good	0.589 \| good	5.721 \| good	0.19 \| good
2026-06-08T03:00:00.000Z	56 \| moderate	12.399 \| fine	55.629 \| fine	46.884 \| good	0.148 \| good	6.849 \| good	0.152 \| good
2026-06-08T04:00:00.000Z	42 \| good	4.699 \| good	21 \| good	45.186 \| good	0.676 \| good	6.217 \| good	0.278 \| good
2026-06-08T05:00:00.000Z	44 \| good	4.199 \| good	19.002 \| good	47.168 \| good	0.679 \| good	6.581 \| good	0.28 \| good
2026-06-08T06:00:00.000Z	39 \| good	3.8 \| good	17.006 \| good	42.212 \| good	0.684 \| good	7.542 \| good	0.326 \| good
2026-06-08T07:00:00.000Z	39 \| good	3.6 \| good	16.001 \| good	42.074 \| good	0.645 \| good	13.483 \| good	0.296 \| good
2026-06-08T08:00:00.000Z	28 \| good	3.301 \| good	15.004 \| good	29.734 \| good	0.645 \| good	15.326 \| good	0.24 \| good
2026-06-08T09:00:00.000Z	36 \| good	3.3 \| good	15.006 \| good	39.177 \| good	0.674 \| good	11.986 \| good	0.213 \| good
2026-06-08T10:00:00.000Z	37 \| good	3.3 \| good	15.004 \| good	40.086 \| good	0.978 \| good	3.505 \| good	0.183 \| good
2026-06-08T11:00:00.000Z	33 \| good	3.4 \| good	15.004 \| good	35.732 \| good	0.821 \| good	4.565 \| good	0.143 \| good
2026-06-08T12:00:00.000Z	37 \| good	3.4 \| good	15.009 \| good	40.1 \| good	0.646 \| good	6.578 \| good	0.206 \| good
2026-06-08T12:00:00.000Z	37 \| good	3.4 \| good	15.009 \| good	40.1 \| good	0.646 \| good	6.578 \| good	0.206 \| good
2026-06-08T13:00:00.000Z	56 \| moderate	11.658 \| good	51.903 \| good	28.56 \| good	0.112 \| good	4.159 \| good	0.124 \| good
2026-06-08T14:00:00.000Z	60 \| moderate	13.983 \| fine	63.274 \| fine	33.715 \| good	0.159 \| good	2.15 \| good	0.11 \| good
2026-06-08T15:00:00.000Z	56 \| moderate	12.077 \| good	54.271 \| good	37.971 \| good	0.267 \| good	1.402 \| good	0.105 \| good
2026-06-08T16:00:00.000Z	54 \| moderate	11.137 \| good	49.337 \| good	44.717 \| good	0.294 \| good	1.057 \| good	0.105 \| good
2026-06-08T17:00:00.000Z	56 \| moderate	11.61 \| good	51.658 \| good	49.711 \| good	0.285 \| good	0.953 \| good	0.105 \| good
2026-06-08T18:00:00.000Z	54 \| moderate	11.341 \| good	50.436 \| good	55.724 \| fine	0.267 \| good	0.746 \| good	0.105 \| good
2026-06-08T19:00:00.000Z	64 \| moderate	8.867 \| good	39.44 \| good	58.919 \| fine	0.231 \| good	0.715 \| good	0.104 \| good
2026-06-08T20:00:00.000Z	67 \| moderate	3.529 \| good	15.148 \| good	60.461 \| fine	0.205 \| good	0.679 \| good	0.103 \| good
2026-06-08T21:00:00.000Z	71 \| moderate	3.316 \| good	13.978 \| good	61.101 \| fine	0.189 \| good	0.727 \| good	0.103 \| good
2026-06-08T22:00:00.000Z	58 \| moderate	2.474 \| good	10.385 \| good	57.024 \| fine	0.198 \| good	0.824 \| good	0.104 \| good
2026-06-08T23:00:00.000Z	51 \| moderate	0.559 \| good	2.197 \| good	54.77 \| good	0.225 \| good	0.965 \| good	0.106 \| good
2026-06-09T00:00:00.000Z	50 \| good	0.646 \| good	2.34 \| good	53.645 \| good	0.229 \| good	1.206 \| good	0.108 \| good
2026-06-09T01:00:00.000Z	48 \| good	0.583 \| good	2.355 \| good	52.315 \| good	0.243 \| good	1.966 \| good	0.114 \| good
2026-06-09T02:00:00.000Z	44 \| good	0.31 \| good	0.803 \| good	47.398 \| good	0.269 \| good	2.789 \| good	0.119 \| good
2026-06-09T03:00:00.000Z	36 \| good	0.766 \| good	3.351 \| good	39.326 \| good	0.285 \| good	4.518 \| good	0.131 \| good
2026-06-09T04:00:00.000Z	36 \| good	1.753 \| good	7.093 \| good	39.288 \| good	0.3 \| good	5.11 \| good	0.136 \| good
2026-06-09T05:00:00.000Z	33 \| good	6.328 \| good	28.318 \| good	34.001 \| good	0.321 \| good	5.693 \| good	0.14 \| good
2026-06-09T06:00:00.000Z	49 \| good	9.461 \| good	41.845 \| good	31.695 \| good	0.326 \| good	6.327 \| good	0.146 \| good
2026-06-09T07:00:00.000Z	33 \| good	6.186 \| good	27.196 \| good	27.727 \| good	0.316 \| good	6.564 \| good	0.15 \| good
2026-06-09T08:00:00.000Z	44 \| good	7.721 \| good	33.684 \| good	26.342 \| good	0.302 \| good	6.717 \| good	0.151 \| good
2026-06-09T09:00:00.000Z	38 \| good	7.11 \| good	31.471 \| good	25.936 \| good	0.284 \| good	6.964 \| good	0.153 \| good
2026-06-09T10:00:00.000Z	38 \| good	6.855 \| good	30.203 \| good	26.326 \| good	0.264 \| good	7.437 \| good	0.153 \| good
2026-06-09T11:00:00.000Z	33 \| good	6.187 \| good	27.208 \| good	28.825 \| good	0.234 \| good	7.633 \| good	0.151 \| good
2026-06-09T12:00:00.000Z	38 \| good	6.585 \| good	29.079 \| good	27.44 \| good	0.208 \| good	7.023 \| good	0.15 \| good
2026-06-09T13:00:00.000Z	38 \| good	7.431 \| good	32.629 \| good	25.13 \| good	0.181 \| good	4.916 \| good	0.144 \| good
2026-06-09T14:00:00.000Z	38 \| good	7.413 \| good	32.455 \| good	31.518 \| good	0.176 \| good	3.648 \| good	0.136 \| good
2026-06-09T15:00:00.000Z	44 \| good	5.149 \| good	22.412 \| good	46.662 \| good	0.192 \| good	2.719 \| good	0.124 \| good
2026-06-09T16:00:00.000Z	50 \| good	7.328 \| good	32.522 \| good	54.117 \| good	0.196 \| good	1.827 \| good	0.11 \| good
2026-06-09T17:00:00.000Z	74 \| moderate	7.639 \| good	33.767 \| good	61.645 \| fine	0.133 \| good	0.698 \| good	0.093 \| good
2026-06-09T18:00:00.000Z	74 \| moderate	6.527 \| good	28.792 \| good	62.128 \| fine	0.098 \| good	0.386 \| good	0.086 \| good
2026-06-09T19:00:00.000Z	67 \| moderate	4.67 \| good	20.765 \| good	60.026 \| fine	0.081 \| good	0.289 \| good	0.084 \| good
2026-06-09T20:00:00.000Z	86 \| moderate	27.984 \| fine	121.663 \| fine	57.972 \| fine	0.072 \| good	0.253 \| good	0.084 \| good
2026-06-09T21:00:00.000Z	75 \| moderate	21.758 \| fine	95.655 \| fine	56.046 \| fine	0.07 \| good	0.254 \| good	0.085 \| good
2026-06-09T22:00:00.000Z	51 \| moderate	6.35 \| good	27.51 \| good	54.627 \| good	0.067 \| good	0.267 \| good	0.086 \| good
2026-06-09T23:00:00.000Z	51 \| moderate	5.235 \| good	23.225 \| good	54.774 \| good	0.063 \| good	0.291 \| good	0.087 \| good
2026-06-10T00:00:00.000Z	48 \| good	6.117 \| good	26.816 \| good	51.861 \| good	0.061 \| good	0.35 \| good	0.088 \| good
2026-06-10T01:00:00.000Z	88 \| moderate	28.513 \| fine	124.752 \| fine	47.076 \| good	0.062 \| good	0.612 \| good	0.091 \| good
2026-06-10T02:00:00.000Z	97 \| moderate	33.897 \| fine	147.424 \| fine	44.538 \| good	0.073 \| good	1.408 \| good	0.096 \| good
2026-06-10T03:00:00.000Z	129 \| sensitive	46.868 \| moderate	211.208 \| moderate	45.489 \| good	0.093 \| good	3.282 \| good	0.11 \| good
2026-06-10T04:00:00.000Z	49 \| good	8.94 \| good	39.213 \| good	52.611 \| good	0.107 \| good	4.598 \| good	0.12 \| good
2026-06-10T05:00:00.000Z	77 \| moderate	22.595 \| fine	99.259 \| fine	47.161 \| good	0.115 \| good	5.508 \| good	0.128 \| good
2026-06-10T06:00:00.000Z	33 \| good	5.591 \| good	8.411 \| good	29.835 \| good	0.116 \| good	5.718 \| good	0.131 \| good
2026-06-10T07:00:00.000Z	88 \| moderate	28.86 \| fine	127.39 \| fine	35.367 \| good	0.111 \| good	4.466 \| good	0.122 \| good
2026-06-10T08:00:00.000Z	90 \| moderate	30.268 \| fine	132.597 \| fine	31.192 \| good	0.109 \| good	3.904 \| good	0.118 \| good
2026-06-10T09:00:00.000Z	103 \| sensitive	36.296 \| moderate	159.363 \| moderate	24.024 \| good	0.108 \| good	3.585 \| good	0.116 \| good
2026-06-10T10:00:00.000Z	142 \| sensitive	51.547 \| moderate	231.529 \| moderate	26.862 \| good	0.109 \| good	3.537 \| good	0.116 \| good
2026-06-10T11:00:00.000Z	151 \| unhealthy	55.766 \| poor	249.381 \| moderate	24.527 \| good	0.112 \| good	3.857 \| good	0.117 \| good
2026-06-10T12:00:00.000Z	27 \| good	5.072 \| good	7.862 \| good	27.513 \| good	0.118 \| good	4.081 \| good	0.12 \| good

Longmont

Empower business decisions with accurate air quality data

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

0.16ppm

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 09:00:00 on 2026-06-07.

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

The best air quality in Longmont, Colorado was recorded at 08:00:00 on 2026-06-08.

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

The real-time air quality index in Longmont, Colorado is 37, currently categorized as Good.

Which pollutant is found most often in Longmont, Colorado?

The most common pollutant in Longmont, Colorado is O3.

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 3.4 μg/m³.

What are the current PM₁₀ levels at Longmont, Colorado?

The current PM₁₀ levels in Longmont, Colorado are 15.009 μg/m³.

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

The current carbon monoxide (CO) level in Longmont, Colorado is 0.206 ppm.

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

The current sulfur dioxide (SO₂) levels in Longmont, Colorado are 0.646 ppb.

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

The current ozone (O₃) levels at Longmont, Colorado is 40.1 ppm.

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

The current nitrogen dioxide (NO₂) levels at Longmont, Colorado is 6.578 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-06T13:00:00.000Z	44 \| good	7.999 \| good	34.996 \| good	33.741 \| good	0.619 \| good	8.598 \| good	0.209 \| good
2026-06-06T14:00:00.000Z	44 \| good	8.099 \| good	35.994 \| good	36.572 \| good	0.657 \| good	8.205 \| good	0.167 \| good
2026-06-06T15:00:00.000Z	44 \| good	8.2 \| good	36 \| good	39.859 \| good	0.943 \| good	11.353 \| good	0.19 \| good
2026-06-06T16:00:00.000Z	44 \| good	8.2 \| good	35.996 \| good	47.728 \| good	1.098 \| good	7.94 \| good	0.188 \| good
2026-06-06T17:00:00.000Z	51 \| moderate	8.3 \| good	36.994 \| good	55.111 \| fine	0.936 \| good	7.249 \| good	0.191 \| good
2026-06-06T18:00:00.000Z	51 \| moderate	8.5 \| good	36.996 \| good	54.764 \| good	1.048 \| good	6.431 \| good	0.233 \| good
2026-06-06T19:00:00.000Z	67 \| moderate	8.599 \| good	37.993 \| good	60.081 \| fine	0.801 \| good	7.636 \| good	0.21 \| good
2026-06-06T20:00:00.000Z	77 \| moderate	7.998 \| good	34.994 \| good	62.742 \| fine	0.625 \| good	5.124 \| good	0.188 \| good
2026-06-06T21:00:00.000Z	77 \| moderate	6.199 \| good	27.999 \| good	62.821 \| fine	0.599 \| good	2.522 \| good	0.121 \| good
2026-06-06T22:00:00.000Z	80 \| moderate	5.299 \| good	22.999 \| good	64.162 \| fine	0.594 \| good	1.902 \| good	0.121 \| good
2026-06-06T23:00:00.000Z	74 \| moderate	5.099 \| good	21.999 \| good	61.892 \| fine	0.683 \| good	2.817 \| good	0.121 \| good
2026-06-07T00:00:00.000Z	58 \| moderate	4.899 \| good	21 \| good	57.5 \| fine	0.625 \| good	5.538 \| good	0.143 \| good
2026-06-07T01:00:00.000Z	61 \| moderate	4.599 \| good	19.996 \| good	58.052 \| fine	0.594 \| good	7.761 \| good	0.164 \| good
2026-06-07T02:00:00.000Z	51 \| moderate	4.599 \| good	19.998 \| good	54.951 \| good	0.646 \| good	9.527 \| good	0.209 \| good
2026-06-07T03:00:00.000Z	50 \| good	4.6 \| good	20.001 \| good	53.556 \| good	0.539 \| good	4.555 \| good	0.145 \| good
2026-06-07T04:00:00.000Z	48 \| good	4.899 \| good	21.004 \| good	51.566 \| good	0.667 \| good	4.797 \| good	0.143 \| good
2026-06-07T05:00:00.000Z	49 \| good	5.099 \| good	22.003 \| good	52.769 \| good	0.935 \| good	5.988 \| good	0.143 \| good
2026-06-07T06:00:00.000Z	46 \| good	4.7 \| good	21.007 \| good	49.975 \| good	0.997 \| good	8.684 \| good	0.187 \| good
2026-06-07T07:00:00.000Z	42 \| good	4.7 \| good	21.004 \| good	44.986 \| good	0.643 \| good	5.8 \| good	0.166 \| good
2026-06-07T08:00:00.000Z	37 \| good	4.7 \| good	21.011 \| good	40.41 \| good	0.594 \| good	7.084 \| good	0.145 \| good
2026-06-07T09:00:00.000Z	34 \| good	4.7 \| good	21.008 \| good	36.646 \| good	0.62 \| good	6.075 \| good	0.166 \| good
2026-06-07T10:00:00.000Z	30 \| good	4.7 \| good	21.003 \| good	32.148 \| good	0.618 \| good	7.744 \| good	0.143 \| good
2026-06-07T11:00:00.000Z	29 \| good	4.7 \| good	21.003 \| good	30.75 \| good	0.736 \| good	6.373 \| good	0.121 \| good
2026-06-07T12:00:00.000Z	32 \| good	4.799 \| good	21.002 \| good	35.427 \| good	0.568 \| good	8.144 \| good	0.145 \| good
2026-06-07T13:00:00.000Z	40 \| good	4.8 \| good	21.003 \| good	43.089 \| good	0.623 \| good	11.901 \| good	0.166 \| good
2026-06-07T14:00:00.000Z	37 \| good	5.099 \| good	22 \| good	39.694 \| good	0.776 \| good	7.225 \| good	0.19 \| good
2026-06-07T15:00:00.000Z	39 \| good	5.199 \| good	22.998 \| good	42.168 \| good	0.682 \| good	7.796 \| good	0.143 \| good
2026-06-07T16:00:00.000Z	44 \| good	5.199 \| good	22.999 \| good	47.337 \| good	1.101 \| good	7.497 \| good	0.145 \| good
2026-06-07T17:00:00.000Z	46 \| good	5.199 \| good	22.999 \| good	50.13 \| good	0.654 \| good	3.72 \| good	0.1 \| good
2026-06-07T18:00:00.000Z	49 \| good	5.199 \| good	22.998 \| good	52.642 \| good	0.627 \| good	2.283 \| good	0.1 \| good
2026-06-07T19:00:00.000Z	50 \| good	5 \| good	22.001 \| good	54.25 \| good	0.651 \| good	2.194 \| good	0.121 \| good
2026-06-07T20:00:00.000Z	58 \| moderate	4.599 \| good	20.001 \| good	57.014 \| fine	0.625 \| good	1.883 \| good	0.121 \| good
2026-06-07T21:00:00.000Z	58 \| moderate	4.3 \| good	19 \| good	56.801 \| fine	0.63 \| good	2.576 \| good	0.121 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	4.2 \| good	18.999 \| good	55.368 \| fine	0.544 \| good	3.415 \| good	0.143 \| good
2026-06-07T23:00:00.000Z	54 \| moderate	4.3 \| good	19.002 \| good	56.367 \| fine	0.594 \| good	4.746 \| good	0.188 \| good
2026-06-08T00:00:00.000Z	51 \| moderate	4 \| good	18.003 \| good	55.061 \| fine	0.571 \| good	1.625 \| good	0.209 \| good
2026-06-08T01:00:00.000Z	45 \| good	3.6 \| good	16.005 \| good	49.292 \| good	0.542 \| good	6.703 \| good	0.211 \| good
2026-06-08T02:00:00.000Z	46 \| good	3.7 \| good	16.002 \| good	49.961 \| good	0.589 \| good	5.721 \| good	0.19 \| good
2026-06-08T03:00:00.000Z	56 \| moderate	12.399 \| fine	55.629 \| fine	46.884 \| good	0.148 \| good	6.849 \| good	0.152 \| good
2026-06-08T04:00:00.000Z	42 \| good	4.699 \| good	21 \| good	45.186 \| good	0.676 \| good	6.217 \| good	0.278 \| good
2026-06-08T05:00:00.000Z	44 \| good	4.199 \| good	19.002 \| good	47.168 \| good	0.679 \| good	6.581 \| good	0.28 \| good
2026-06-08T06:00:00.000Z	39 \| good	3.8 \| good	17.006 \| good	42.212 \| good	0.684 \| good	7.542 \| good	0.326 \| good
2026-06-08T07:00:00.000Z	39 \| good	3.6 \| good	16.001 \| good	42.074 \| good	0.645 \| good	13.483 \| good	0.296 \| good
2026-06-08T08:00:00.000Z	28 \| good	3.301 \| good	15.004 \| good	29.734 \| good	0.645 \| good	15.326 \| good	0.24 \| good
2026-06-08T09:00:00.000Z	36 \| good	3.3 \| good	15.006 \| good	39.177 \| good	0.674 \| good	11.986 \| good	0.213 \| good
2026-06-08T10:00:00.000Z	37 \| good	3.3 \| good	15.004 \| good	40.086 \| good	0.978 \| good	3.505 \| good	0.183 \| good
2026-06-08T11:00:00.000Z	33 \| good	3.4 \| good	15.004 \| good	35.732 \| good	0.821 \| good	4.565 \| good	0.143 \| good
2026-06-08T12:00:00.000Z	37 \| good	3.4 \| good	15.009 \| good	40.1 \| good	0.646 \| good	6.578 \| good	0.206 \| good
2026-06-08T12:00:00.000Z	37 \| good	3.4 \| good	15.009 \| good	40.1 \| good	0.646 \| good	6.578 \| good	0.206 \| good
2026-06-08T13:00:00.000Z	56 \| moderate	11.658 \| good	51.903 \| good	28.56 \| good	0.112 \| good	4.159 \| good	0.124 \| good
2026-06-08T14:00:00.000Z	60 \| moderate	13.983 \| fine	63.274 \| fine	33.715 \| good	0.159 \| good	2.15 \| good	0.11 \| good
2026-06-08T15:00:00.000Z	56 \| moderate	12.077 \| good	54.271 \| good	37.971 \| good	0.267 \| good	1.402 \| good	0.105 \| good
2026-06-08T16:00:00.000Z	54 \| moderate	11.137 \| good	49.337 \| good	44.717 \| good	0.294 \| good	1.057 \| good	0.105 \| good
2026-06-08T17:00:00.000Z	56 \| moderate	11.61 \| good	51.658 \| good	49.711 \| good	0.285 \| good	0.953 \| good	0.105 \| good
2026-06-08T18:00:00.000Z	54 \| moderate	11.341 \| good	50.436 \| good	55.724 \| fine	0.267 \| good	0.746 \| good	0.105 \| good
2026-06-08T19:00:00.000Z	64 \| moderate	8.867 \| good	39.44 \| good	58.919 \| fine	0.231 \| good	0.715 \| good	0.104 \| good
2026-06-08T20:00:00.000Z	67 \| moderate	3.529 \| good	15.148 \| good	60.461 \| fine	0.205 \| good	0.679 \| good	0.103 \| good
2026-06-08T21:00:00.000Z	71 \| moderate	3.316 \| good	13.978 \| good	61.101 \| fine	0.189 \| good	0.727 \| good	0.103 \| good
2026-06-08T22:00:00.000Z	58 \| moderate	2.474 \| good	10.385 \| good	57.024 \| fine	0.198 \| good	0.824 \| good	0.104 \| good
2026-06-08T23:00:00.000Z	51 \| moderate	0.559 \| good	2.197 \| good	54.77 \| good	0.225 \| good	0.965 \| good	0.106 \| good
2026-06-09T00:00:00.000Z	50 \| good	0.646 \| good	2.34 \| good	53.645 \| good	0.229 \| good	1.206 \| good	0.108 \| good
2026-06-09T01:00:00.000Z	48 \| good	0.583 \| good	2.355 \| good	52.315 \| good	0.243 \| good	1.966 \| good	0.114 \| good
2026-06-09T02:00:00.000Z	44 \| good	0.31 \| good	0.803 \| good	47.398 \| good	0.269 \| good	2.789 \| good	0.119 \| good
2026-06-09T03:00:00.000Z	36 \| good	0.766 \| good	3.351 \| good	39.326 \| good	0.285 \| good	4.518 \| good	0.131 \| good
2026-06-09T04:00:00.000Z	36 \| good	1.753 \| good	7.093 \| good	39.288 \| good	0.3 \| good	5.11 \| good	0.136 \| good
2026-06-09T05:00:00.000Z	33 \| good	6.328 \| good	28.318 \| good	34.001 \| good	0.321 \| good	5.693 \| good	0.14 \| good
2026-06-09T06:00:00.000Z	49 \| good	9.461 \| good	41.845 \| good	31.695 \| good	0.326 \| good	6.327 \| good	0.146 \| good
2026-06-09T07:00:00.000Z	33 \| good	6.186 \| good	27.196 \| good	27.727 \| good	0.316 \| good	6.564 \| good	0.15 \| good
2026-06-09T08:00:00.000Z	44 \| good	7.721 \| good	33.684 \| good	26.342 \| good	0.302 \| good	6.717 \| good	0.151 \| good
2026-06-09T09:00:00.000Z	38 \| good	7.11 \| good	31.471 \| good	25.936 \| good	0.284 \| good	6.964 \| good	0.153 \| good
2026-06-09T10:00:00.000Z	38 \| good	6.855 \| good	30.203 \| good	26.326 \| good	0.264 \| good	7.437 \| good	0.153 \| good
2026-06-09T11:00:00.000Z	33 \| good	6.187 \| good	27.208 \| good	28.825 \| good	0.234 \| good	7.633 \| good	0.151 \| good
2026-06-09T12:00:00.000Z	38 \| good	6.585 \| good	29.079 \| good	27.44 \| good	0.208 \| good	7.023 \| good	0.15 \| good
2026-06-09T13:00:00.000Z	38 \| good	7.431 \| good	32.629 \| good	25.13 \| good	0.181 \| good	4.916 \| good	0.144 \| good
2026-06-09T14:00:00.000Z	38 \| good	7.413 \| good	32.455 \| good	31.518 \| good	0.176 \| good	3.648 \| good	0.136 \| good
2026-06-09T15:00:00.000Z	44 \| good	5.149 \| good	22.412 \| good	46.662 \| good	0.192 \| good	2.719 \| good	0.124 \| good
2026-06-09T16:00:00.000Z	50 \| good	7.328 \| good	32.522 \| good	54.117 \| good	0.196 \| good	1.827 \| good	0.11 \| good
2026-06-09T17:00:00.000Z	74 \| moderate	7.639 \| good	33.767 \| good	61.645 \| fine	0.133 \| good	0.698 \| good	0.093 \| good
2026-06-09T18:00:00.000Z	74 \| moderate	6.527 \| good	28.792 \| good	62.128 \| fine	0.098 \| good	0.386 \| good	0.086 \| good
2026-06-09T19:00:00.000Z	67 \| moderate	4.67 \| good	20.765 \| good	60.026 \| fine	0.081 \| good	0.289 \| good	0.084 \| good
2026-06-09T20:00:00.000Z	86 \| moderate	27.984 \| fine	121.663 \| fine	57.972 \| fine	0.072 \| good	0.253 \| good	0.084 \| good
2026-06-09T21:00:00.000Z	75 \| moderate	21.758 \| fine	95.655 \| fine	56.046 \| fine	0.07 \| good	0.254 \| good	0.085 \| good
2026-06-09T22:00:00.000Z	51 \| moderate	6.35 \| good	27.51 \| good	54.627 \| good	0.067 \| good	0.267 \| good	0.086 \| good
2026-06-09T23:00:00.000Z	51 \| moderate	5.235 \| good	23.225 \| good	54.774 \| good	0.063 \| good	0.291 \| good	0.087 \| good
2026-06-10T00:00:00.000Z	48 \| good	6.117 \| good	26.816 \| good	51.861 \| good	0.061 \| good	0.35 \| good	0.088 \| good
2026-06-10T01:00:00.000Z	88 \| moderate	28.513 \| fine	124.752 \| fine	47.076 \| good	0.062 \| good	0.612 \| good	0.091 \| good
2026-06-10T02:00:00.000Z	97 \| moderate	33.897 \| fine	147.424 \| fine	44.538 \| good	0.073 \| good	1.408 \| good	0.096 \| good
2026-06-10T03:00:00.000Z	129 \| sensitive	46.868 \| moderate	211.208 \| moderate	45.489 \| good	0.093 \| good	3.282 \| good	0.11 \| good
2026-06-10T04:00:00.000Z	49 \| good	8.94 \| good	39.213 \| good	52.611 \| good	0.107 \| good	4.598 \| good	0.12 \| good
2026-06-10T05:00:00.000Z	77 \| moderate	22.595 \| fine	99.259 \| fine	47.161 \| good	0.115 \| good	5.508 \| good	0.128 \| good
2026-06-10T06:00:00.000Z	33 \| good	5.591 \| good	8.411 \| good	29.835 \| good	0.116 \| good	5.718 \| good	0.131 \| good
2026-06-10T07:00:00.000Z	88 \| moderate	28.86 \| fine	127.39 \| fine	35.367 \| good	0.111 \| good	4.466 \| good	0.122 \| good
2026-06-10T08:00:00.000Z	90 \| moderate	30.268 \| fine	132.597 \| fine	31.192 \| good	0.109 \| good	3.904 \| good	0.118 \| good
2026-06-10T09:00:00.000Z	103 \| sensitive	36.296 \| moderate	159.363 \| moderate	24.024 \| good	0.108 \| good	3.585 \| good	0.116 \| good
2026-06-10T10:00:00.000Z	142 \| sensitive	51.547 \| moderate	231.529 \| moderate	26.862 \| good	0.109 \| good	3.537 \| good	0.116 \| good
2026-06-10T11:00:00.000Z	151 \| unhealthy	55.766 \| poor	249.381 \| moderate	24.527 \| good	0.112 \| good	3.857 \| good	0.117 \| good
2026-06-10T12:00:00.000Z	27 \| good	5.072 \| good	7.862 \| good	27.513 \| good	0.118 \| good	4.081 \| good	0.12 \| 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?