What is the current concentration of PM10 in Louisville, Colorado?

The current PM10 concentration at Louisville, Colorado is 36.353 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Louisville, Colorado?

The current sulfur dioxide (SO2) concentration at Louisville, Colorado is 0.814 ppb.

What is the current concentration of ozone (O3) in Louisville, Colorado?

The current ozone (O3) concentration at Louisville, Colorado is 63.071 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Louisville, Colorado?

The current nitrogen dioxide (NO2) concentration at Louisville, Colorado is 11.283 ppb.

Louisville, Colorado live air quality index now

Q: What is the current concentration of PM2.5 in Louisville, Colorado?

The current PM2.5 concentration at Louisville, Colorado is 8.59 μg/m3.

Stay updated with real-time air quality in Louisville, 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

Louisville, Colorado

Last updated: ... (Local time)

Major air pollutants in Louisville, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

8.59 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

36.35 μg/m³

155

255

425

605+

Ozone (O₃)

63.07 ppb

201

201+

Sulfur Dioxide (SO₂)

0.81 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.28 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Louisville, Colorado

Get Live Pollen Counts

Louisville, Colorado

Scroll To Air Quality Map

Track live Louisville, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T22:00:00.000Z	119 \| sensitive	14.332 \| fine	56.578 \| fine	75.845 \| moderate	0.62 \| good	4.164 \| good	0.175 \| good
2026-07-21T23:00:00.000Z	115 \| sensitive	11.453 \| good	50.919 \| good	74.818 \| moderate	0.561 \| good	3.692 \| good	0.175 \| good
2026-07-22T00:00:00.000Z	90 \| moderate	10.769 \| good	42.913 \| good	67.271 \| fine	0.555 \| good	4.488 \| good	0.192 \| good
2026-07-22T01:00:00.000Z	90 \| moderate	9.539 \| good	44.744 \| good	66.758 \| fine	0.78 \| good	5.587 \| good	0.173 \| good
2026-07-22T02:00:00.000Z	77 \| moderate	8.873 \| good	35.432 \| good	63.245 \| fine	0.45 \| good	9.399 \| good	0.226 \| good
2026-07-22T03:00:00.000Z	74 \| moderate	8.217 \| good	33.043 \| good	61.527 \| fine	0.454 \| good	12.929 \| good	0.226 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	7.595 \| good	26.773 \| good	57.259 \| fine	0.477 \| good	16.512 \| good	0.257 \| good
2026-07-22T05:00:00.000Z	48 \| good	7.249 \| good	31.947 \| good	51.691 \| good	0.685 \| good	11.58 \| good	0.226 \| good
2026-07-22T06:00:00.000Z	47 \| good	6.95 \| good	27.356 \| good	50.839 \| good	0.491 \| good	6.897 \| good	0.173 \| good
2026-07-22T07:00:00.000Z	45 \| good	5.892 \| good	21.013 \| good	48.827 \| good	0.564 \| good	4.199 \| good	0.156 \| good
2026-07-22T08:00:00.000Z	43 \| good	5.677 \| good	20.034 \| good	45.682 \| good	0.603 \| good	5.529 \| good	0.156 \| good
2026-07-22T09:00:00.000Z	39 \| good	6.064 \| good	22.571 \| good	42.344 \| good	0.391 \| good	6.103 \| good	0.156 \| good
2026-07-22T10:00:00.000Z	38 \| good	6.635 \| good	22.299 \| good	41.105 \| good	0.418 \| good	7.408 \| good	0.156 \| good
2026-07-22T11:00:00.000Z	38 \| good	7.017 \| good	21.154 \| good	39.514 \| good	0.561 \| good	9.313 \| good	0.183 \| good
2026-07-22T12:00:00.000Z	34 \| good	5.892 \| good	22.681 \| good	37.264 \| good	0.504 \| good	10.597 \| good	0.271 \| good
2026-07-22T13:00:00.000Z	33 \| good	5.98 \| good	25.937 \| good	34.112 \| good	0.51 \| good	11.789 \| good	0.271 \| good
2026-07-22T14:00:00.000Z	36 \| good	6.176 \| good	26.023 \| good	39.339 \| good	0.688 \| good	14.387 \| good	0.327 \| good
2026-07-22T15:00:00.000Z	69 \| moderate	18.972 \| fine	39.056 \| good	43.671 \| good	1.059 \| good	19.796 \| good	0.327 \| good
2026-07-22T16:00:00.000Z	49 \| good	8.677 \| good	37.718 \| good	47.093 \| good	0.617 \| good	16.409 \| good	0.271 \| good
2026-07-22T17:00:00.000Z	71 \| moderate	20.192 \| fine	59.717 \| fine	54.695 \| good	0.812 \| good	10.905 \| good	0.218 \| good
2026-07-22T18:00:00.000Z	71 \| moderate	18.091 \| fine	34.08 \| good	60.593 \| fine	0.817 \| good	7.382 \| good	0.228 \| good
2026-07-22T19:00:00.000Z	84 \| moderate	9.146 \| good	31.596 \| good	65.48 \| fine	0.683 \| good	8.897 \| good	0.228 \| good
2026-07-22T20:00:00.000Z	87 \| moderate	9.251 \| good	39.6 \| good	66.096 \| fine	0.59 \| good	6.345 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	100 \| moderate	8.51 \| good	32.483 \| good	69.985 \| fine	0.621 \| good	11.252 \| good	0.287 \| good
2026-07-22T22:00:00.000Z	101 \| sensitive	9.776 \| good	40.396 \| good	70.937 \| fine	0.65 \| good	16.747 \| good	0.311 \| good
2026-07-22T23:00:00.000Z	97 \| moderate	9.664 \| good	36.412 \| good	69.303 \| fine	0.564 \| good	9.071 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	93 \| moderate	9.884 \| good	28.386 \| good	68.316 \| fine	0.51 \| good	9.568 \| good	0.228 \| good
2026-07-23T01:00:00.000Z	80 \| moderate	9.631 \| good	33.161 \| good	63.659 \| fine	0.481 \| good	16.162 \| good	0.291 \| good
2026-07-23T02:00:00.000Z	64 \| moderate	9.03 \| good	29.481 \| good	59.443 \| fine	0.514 \| good	19.534 \| good	0.291 \| good
2026-07-23T03:00:00.000Z	44 \| good	5.663 \| good	24.637 \| good	48.406 \| good	0.205 \| good	6.826 \| good	0.176 \| good
2026-07-23T04:00:00.000Z	44 \| good	6.586 \| good	24.375 \| good	47.727 \| good	0.565 \| good	20.635 \| good	0.264 \| good
2026-07-23T05:00:00.000Z	40 \| good	4.78 \| good	15.407 \| good	42.771 \| good	0.505 \| good	18.868 \| good	0.21 \| good
2026-07-23T06:00:00.000Z	37 \| good	5.273 \| good	21.17 \| good	39.87 \| good	0.445 \| good	12.069 \| good	0.182 \| good
2026-07-23T07:00:00.000Z	33 \| good	5.737 \| good	20.855 \| good	36.428 \| good	0.389 \| good	8.765 \| good	0.154 \| good
2026-07-23T08:00:00.000Z	32 \| good	4.706 \| good	17.409 \| good	34.724 \| good	0.443 \| good	9.387 \| good	0.182 \| good
2026-07-23T09:00:00.000Z	31 \| good	4.959 \| good	16.718 \| good	34.057 \| good	0.593 \| good	11.39 \| good	0.182 \| good
2026-07-23T10:00:00.000Z	29 \| good	5.112 \| good	23.929 \| good	30.977 \| good	0.705 \| good	12.773 \| good	0.182 \| good
2026-07-23T11:00:00.000Z	28 \| good	5.094 \| good	21.552 \| good	30.328 \| good	0.702 \| good	14.963 \| good	0.19 \| good
2026-07-23T12:00:00.000Z	33 \| good	6.388 \| good	27.091 \| good	29.181 \| good	0.533 \| good	14.826 \| good	0.212 \| good
2026-07-23T13:00:00.000Z	33 \| good	5.858 \| good	28.261 \| good	30.468 \| good	0.593 \| good	22.383 \| good	0.354 \| good
2026-07-23T14:00:00.000Z	38 \| good	7.095 \| good	22.53 \| good	31.175 \| good	0.593 \| good	15.078 \| good	0.354 \| good
2026-07-23T15:00:00.000Z	44 \| good	7.632 \| good	28.961 \| good	37.006 \| good	0.598 \| good	13.192 \| good	0.315 \| good
2026-07-23T16:00:00.000Z	44 \| good	8.375 \| good	33.561 \| good	39.572 \| good	0.776 \| good	13.103 \| good	0.267 \| good
2026-07-23T17:00:00.000Z	49 \| good	9.27 \| good	37.818 \| good	41.155 \| good	0.806 \| good	13.773 \| good	0.236 \| good
2026-07-23T18:00:00.000Z	49 \| good	9.277 \| good	38.916 \| good	46.464 \| good	0.77 \| good	10.71 \| good	0.264 \| good
2026-07-23T19:00:00.000Z	52 \| moderate	10.116 \| good	45.081 \| good	54.847 \| good	0.79 \| good	9.914 \| good	0.192 \| good
2026-07-23T20:00:00.000Z	64 \| moderate	9.549 \| good	40.391 \| good	59.461 \| fine	0.793 \| good	10.707 \| good	0.192 \| good
2026-07-23T21:00:00.000Z	74 \| moderate	7.413 \| good	32.995 \| good	62.235 \| fine	0.71 \| good	11.572 \| good	0.225 \| good
2026-07-23T21:00:00.000Z	77 \| moderate	8.59 \| good	36.353 \| good	63.071 \| fine	0.814 \| good	11.283 \| good	0.192 \| good
2026-07-23T22:00:00.000Z	84 \| moderate	7.58 \| good	33.55 \| good	65.084 \| fine	0.179 \| good	1.227 \| good	0.113 \| good
2026-07-23T23:00:00.000Z	67 \| moderate	7.78 \| good	34.205 \| good	59.613 \| fine	0.168 \| good	1.476 \| good	0.116 \| good
2026-07-24T00:00:00.000Z	61 \| moderate	5.675 \| good	24.646 \| good	57.54 \| fine	0.157 \| good	1.556 \| good	0.116 \| good
2026-07-24T01:00:00.000Z	51 \| moderate	4.574 \| good	19.919 \| good	54.548 \| good	0.148 \| good	1.769 \| good	0.117 \| good
2026-07-24T02:00:00.000Z	48 \| good	3.574 \| good	15.671 \| good	51.885 \| good	0.151 \| good	4.008 \| good	0.136 \| good
2026-07-24T03:00:00.000Z	46 \| good	4.117 \| good	18.555 \| good	50.21 \| good	0.169 \| good	7.668 \| good	0.165 \| good
2026-07-24T04:00:00.000Z	43 \| good	4.185 \| good	18.661 \| good	46.258 \| good	0.188 \| good	10.123 \| good	0.185 \| good
2026-07-24T05:00:00.000Z	45 \| good	3.106 \| good	13.791 \| good	49.066 \| good	0.193 \| good	11.679 \| good	0.198 \| good
2026-07-24T06:00:00.000Z	42 \| good	1.47 \| good	6.057 \| good	45.406 \| good	0.181 \| good	11.014 \| good	0.193 \| good
2026-07-24T07:00:00.000Z	40 \| good	2.613 \| good	10.312 \| good	42.508 \| good	0.162 \| good	9.372 \| good	0.18 \| good
2026-07-24T08:00:00.000Z	39 \| good	2.933 \| good	12.211 \| good	41.908 \| good	0.152 \| good	8.454 \| good	0.172 \| good
2026-07-24T09:00:00.000Z	41 \| good	3.243 \| good	14.046 \| good	43.809 \| good	0.135 \| good	7.572 \| good	0.164 \| good
2026-07-24T10:00:00.000Z	38 \| good	4.631 \| good	19.923 \| good	40.602 \| good	0.119 \| good	6.749 \| good	0.156 \| good
2026-07-24T11:00:00.000Z	33 \| good	5.748 \| good	24.996 \| good	35.113 \| good	0.103 \| good	6.129 \| good	0.149 \| good
2026-07-24T12:00:00.000Z	29 \| good	5.458 \| good	23.212 \| good	31.211 \| good	0.088 \| good	5.38 \| good	0.145 \| good
2026-07-24T13:00:00.000Z	38 \| good	6.558 \| good	29.009 \| good	30.778 \| good	0.079 \| good	4.067 \| good	0.143 \| good
2026-07-24T14:00:00.000Z	44 \| good	7.743 \| good	33.983 \| good	39.192 \| good	0.093 \| good	3.276 \| good	0.142 \| good
2026-07-24T15:00:00.000Z	48 \| good	7.403 \| good	32.765 \| good	51.88 \| good	0.126 \| good	2.305 \| good	0.132 \| good
2026-07-24T16:00:00.000Z	61 \| moderate	8.197 \| good	35.834 \| good	57.712 \| fine	0.193 \| good	1.327 \| good	0.123 \| good
2026-07-24T17:00:00.000Z	71 \| moderate	7.429 \| good	32.793 \| good	60.812 \| fine	0.196 \| good	0.735 \| good	0.118 \| good
2026-07-24T18:00:00.000Z	77 \| moderate	6.558 \| good	29.597 \| good	62.507 \| fine	0.193 \| good	0.513 \| good	0.118 \| good
2026-07-24T19:00:00.000Z	74 \| moderate	7.214 \| good	31.901 \| good	62.276 \| fine	0.19 \| good	0.444 \| good	0.118 \| good
2026-07-24T20:00:00.000Z	80 \| moderate	9.42 \| good	42.005 \| good	64.027 \| fine	0.19 \| good	0.427 \| good	0.119 \| good
2026-07-24T21:00:00.000Z	80 \| moderate	10.16 \| good	44.927 \| good	64.128 \| fine	0.19 \| good	0.465 \| good	0.119 \| good
2026-07-24T22:00:00.000Z	74 \| moderate	8.748 \| good	38.016 \| good	61.982 \| fine	0.195 \| good	0.612 \| good	0.119 \| good
2026-07-24T23:00:00.000Z	71 \| moderate	7.951 \| good	34.673 \| good	61.405 \| fine	0.204 \| good	0.915 \| good	0.121 \| good
2026-07-25T00:00:00.000Z	58 \| moderate	4.771 \| good	20.773 \| good	57.059 \| fine	0.202 \| good	1.603 \| good	0.129 \| good
2026-07-25T01:00:00.000Z	58 \| moderate	7.017 \| good	30.778 \| good	57.097 \| fine	0.212 \| good	1.955 \| good	0.131 \| good
2026-07-25T02:00:00.000Z	54 \| moderate	6.929 \| good	30.721 \| good	55.671 \| fine	0.184 \| good	3.256 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	49 \| good	5.038 \| good	21.689 \| good	52.974 \| good	0.176 \| good	4.782 \| good	0.152 \| good
2026-07-25T04:00:00.000Z	47 \| good	4.34 \| good	18.756 \| good	50.757 \| good	0.169 \| good	5.572 \| good	0.158 \| good
2026-07-25T05:00:00.000Z	47 \| good	4.279 \| good	18.902 \| good	50.68 \| good	0.162 \| good	6.158 \| good	0.163 \| good
2026-07-25T06:00:00.000Z	45 \| good	4.176 \| good	18.055 \| good	48.789 \| good	0.155 \| good	6.617 \| good	0.168 \| good
2026-07-25T07:00:00.000Z	44 \| good	4.496 \| good	19.077 \| good	47.347 \| good	0.145 \| good	6.811 \| good	0.17 \| good
2026-07-25T08:00:00.000Z	41 \| good	5.126 \| good	21.993 \| good	44.32 \| good	0.133 \| good	6.962 \| good	0.171 \| good
2026-07-25T09:00:00.000Z	39 \| good	5.399 \| good	22.899 \| good	41.674 \| good	0.119 \| good	7.064 \| good	0.171 \| good
2026-07-25T10:00:00.000Z	39 \| good	6.676 \| good	29.737 \| good	41.576 \| good	0.113 \| good	7.071 \| good	0.17 \| good
2026-07-25T11:00:00.000Z	49 \| good	8.631 \| good	37.949 \| good	35.445 \| good	0.11 \| good	6.961 \| good	0.168 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.991 \| good	34.993 \| good	31.922 \| good	0.107 \| good	6.492 \| good	0.166 \| good
2026-07-25T13:00:00.000Z	49 \| good	8.937 \| good	39.043 \| good	34.023 \| good	0.103 \| good	4.969 \| good	0.161 \| good
2026-07-25T14:00:00.000Z	49 \| good	9.079 \| good	40.673 \| good	44.506 \| good	0.121 \| good	3.952 \| good	0.161 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	8.383 \| good	36.661 \| good	56.404 \| fine	0.151 \| good	2.033 \| good	0.139 \| good
2026-07-25T16:00:00.000Z	84 \| moderate	9.308 \| good	41.472 \| good	65.036 \| fine	0.209 \| good	1.343 \| good	0.13 \| good
2026-07-25T17:00:00.000Z	100 \| moderate	8.476 \| good	36.827 \| good	69.724 \| fine	0.27 \| good	0.971 \| good	0.127 \| good
2026-07-25T18:00:00.000Z	101 \| sensitive	7.124 \| good	31.728 \| good	70.981 \| fine	0.263 \| good	0.702 \| good	0.125 \| good
2026-07-25T19:00:00.000Z	112 \| sensitive	7.13 \| good	31.806 \| good	73.783 \| moderate	0.232 \| good	0.561 \| good	0.122 \| good
2026-07-25T20:00:00.000Z	126 \| sensitive	8.044 \| good	34.955 \| good	77.616 \| moderate	0.201 \| good	0.542 \| good	0.119 \| good
2026-07-25T21:00:00.000Z	112 \| sensitive	8.466 \| good	36.987 \| good	73.581 \| moderate	0.178 \| good	0.701 \| good	0.117 \| good

Louisville

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Louisville, Colorado air quality map: Track AQI near you

0.19ppm

How accurate is Colorado, USA air quality data?

Air quality data and pollutant measurements for Colorado, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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

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Frequently asked questions

How often is the air quality data for Louisville, Colorado updated?

The air quality for Louisville, Colorado is updated every hour.

When was the worst air quality at Louisville, Colorado in the last 24 hrs?

The worst air quality in Louisville, Colorado in the last 24 hours was observed at 10:00:00 on 2026-07-22.

When was the best air quality at Louisville, Colorado in the last 24 hrs?

In the last 24 hrs, the best air quality in Louisville, Colorado was observed at 11:00:00 on 2026-07-23.

What is the current air quality in Louisville, Colorado?

The current air quality in Louisville, Colorado is 77, categorized as Moderate based on real-time data.

What pollutant is the most common in Louisville, Colorado?

The most common pollutant in Louisville, Colorado is O3.

What should I do if the air quality in Louisville, Colorado is poor?

If the air quality in Louisville, Colorado is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Louisville, Colorado?

The current PM_2.5 concentration at Louisville, Colorado is 8.59 μg/m³.

What is the current concentration of PM₁₀ in Louisville, Colorado?

The current PM₁₀ concentration at Louisville, Colorado is 36.353 μg/m³.

What is the current concentration of carbon monoxide (CO) in Louisville, Colorado?

The current carbon monoxide (CO) concentration at Louisville, Colorado is 0.192 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Louisville, Colorado?

The current sulfur dioxide (SO₂) concentration at Louisville, Colorado is 0.814 ppb.

What is the current concentration of ozone (O₃) in Louisville, Colorado?

The current ozone (O₃) concentration at Louisville, Colorado is 63.071 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Louisville, Colorado?

The current nitrogen dioxide (NO₂) concentration at Louisville, Colorado is 11.283 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T22:00:00.000Z	119 \| sensitive	14.332 \| fine	56.578 \| fine	75.845 \| moderate	0.62 \| good	4.164 \| good	0.175 \| good
2026-07-21T23:00:00.000Z	115 \| sensitive	11.453 \| good	50.919 \| good	74.818 \| moderate	0.561 \| good	3.692 \| good	0.175 \| good
2026-07-22T00:00:00.000Z	90 \| moderate	10.769 \| good	42.913 \| good	67.271 \| fine	0.555 \| good	4.488 \| good	0.192 \| good
2026-07-22T01:00:00.000Z	90 \| moderate	9.539 \| good	44.744 \| good	66.758 \| fine	0.78 \| good	5.587 \| good	0.173 \| good
2026-07-22T02:00:00.000Z	77 \| moderate	8.873 \| good	35.432 \| good	63.245 \| fine	0.45 \| good	9.399 \| good	0.226 \| good
2026-07-22T03:00:00.000Z	74 \| moderate	8.217 \| good	33.043 \| good	61.527 \| fine	0.454 \| good	12.929 \| good	0.226 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	7.595 \| good	26.773 \| good	57.259 \| fine	0.477 \| good	16.512 \| good	0.257 \| good
2026-07-22T05:00:00.000Z	48 \| good	7.249 \| good	31.947 \| good	51.691 \| good	0.685 \| good	11.58 \| good	0.226 \| good
2026-07-22T06:00:00.000Z	47 \| good	6.95 \| good	27.356 \| good	50.839 \| good	0.491 \| good	6.897 \| good	0.173 \| good
2026-07-22T07:00:00.000Z	45 \| good	5.892 \| good	21.013 \| good	48.827 \| good	0.564 \| good	4.199 \| good	0.156 \| good
2026-07-22T08:00:00.000Z	43 \| good	5.677 \| good	20.034 \| good	45.682 \| good	0.603 \| good	5.529 \| good	0.156 \| good
2026-07-22T09:00:00.000Z	39 \| good	6.064 \| good	22.571 \| good	42.344 \| good	0.391 \| good	6.103 \| good	0.156 \| good
2026-07-22T10:00:00.000Z	38 \| good	6.635 \| good	22.299 \| good	41.105 \| good	0.418 \| good	7.408 \| good	0.156 \| good
2026-07-22T11:00:00.000Z	38 \| good	7.017 \| good	21.154 \| good	39.514 \| good	0.561 \| good	9.313 \| good	0.183 \| good
2026-07-22T12:00:00.000Z	34 \| good	5.892 \| good	22.681 \| good	37.264 \| good	0.504 \| good	10.597 \| good	0.271 \| good
2026-07-22T13:00:00.000Z	33 \| good	5.98 \| good	25.937 \| good	34.112 \| good	0.51 \| good	11.789 \| good	0.271 \| good
2026-07-22T14:00:00.000Z	36 \| good	6.176 \| good	26.023 \| good	39.339 \| good	0.688 \| good	14.387 \| good	0.327 \| good
2026-07-22T15:00:00.000Z	69 \| moderate	18.972 \| fine	39.056 \| good	43.671 \| good	1.059 \| good	19.796 \| good	0.327 \| good
2026-07-22T16:00:00.000Z	49 \| good	8.677 \| good	37.718 \| good	47.093 \| good	0.617 \| good	16.409 \| good	0.271 \| good
2026-07-22T17:00:00.000Z	71 \| moderate	20.192 \| fine	59.717 \| fine	54.695 \| good	0.812 \| good	10.905 \| good	0.218 \| good
2026-07-22T18:00:00.000Z	71 \| moderate	18.091 \| fine	34.08 \| good	60.593 \| fine	0.817 \| good	7.382 \| good	0.228 \| good
2026-07-22T19:00:00.000Z	84 \| moderate	9.146 \| good	31.596 \| good	65.48 \| fine	0.683 \| good	8.897 \| good	0.228 \| good
2026-07-22T20:00:00.000Z	87 \| moderate	9.251 \| good	39.6 \| good	66.096 \| fine	0.59 \| good	6.345 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	100 \| moderate	8.51 \| good	32.483 \| good	69.985 \| fine	0.621 \| good	11.252 \| good	0.287 \| good
2026-07-22T22:00:00.000Z	101 \| sensitive	9.776 \| good	40.396 \| good	70.937 \| fine	0.65 \| good	16.747 \| good	0.311 \| good
2026-07-22T23:00:00.000Z	97 \| moderate	9.664 \| good	36.412 \| good	69.303 \| fine	0.564 \| good	9.071 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	93 \| moderate	9.884 \| good	28.386 \| good	68.316 \| fine	0.51 \| good	9.568 \| good	0.228 \| good
2026-07-23T01:00:00.000Z	80 \| moderate	9.631 \| good	33.161 \| good	63.659 \| fine	0.481 \| good	16.162 \| good	0.291 \| good
2026-07-23T02:00:00.000Z	64 \| moderate	9.03 \| good	29.481 \| good	59.443 \| fine	0.514 \| good	19.534 \| good	0.291 \| good
2026-07-23T03:00:00.000Z	44 \| good	5.663 \| good	24.637 \| good	48.406 \| good	0.205 \| good	6.826 \| good	0.176 \| good
2026-07-23T04:00:00.000Z	44 \| good	6.586 \| good	24.375 \| good	47.727 \| good	0.565 \| good	20.635 \| good	0.264 \| good
2026-07-23T05:00:00.000Z	40 \| good	4.78 \| good	15.407 \| good	42.771 \| good	0.505 \| good	18.868 \| good	0.21 \| good
2026-07-23T06:00:00.000Z	37 \| good	5.273 \| good	21.17 \| good	39.87 \| good	0.445 \| good	12.069 \| good	0.182 \| good
2026-07-23T07:00:00.000Z	33 \| good	5.737 \| good	20.855 \| good	36.428 \| good	0.389 \| good	8.765 \| good	0.154 \| good
2026-07-23T08:00:00.000Z	32 \| good	4.706 \| good	17.409 \| good	34.724 \| good	0.443 \| good	9.387 \| good	0.182 \| good
2026-07-23T09:00:00.000Z	31 \| good	4.959 \| good	16.718 \| good	34.057 \| good	0.593 \| good	11.39 \| good	0.182 \| good
2026-07-23T10:00:00.000Z	29 \| good	5.112 \| good	23.929 \| good	30.977 \| good	0.705 \| good	12.773 \| good	0.182 \| good
2026-07-23T11:00:00.000Z	28 \| good	5.094 \| good	21.552 \| good	30.328 \| good	0.702 \| good	14.963 \| good	0.19 \| good
2026-07-23T12:00:00.000Z	33 \| good	6.388 \| good	27.091 \| good	29.181 \| good	0.533 \| good	14.826 \| good	0.212 \| good
2026-07-23T13:00:00.000Z	33 \| good	5.858 \| good	28.261 \| good	30.468 \| good	0.593 \| good	22.383 \| good	0.354 \| good
2026-07-23T14:00:00.000Z	38 \| good	7.095 \| good	22.53 \| good	31.175 \| good	0.593 \| good	15.078 \| good	0.354 \| good
2026-07-23T15:00:00.000Z	44 \| good	7.632 \| good	28.961 \| good	37.006 \| good	0.598 \| good	13.192 \| good	0.315 \| good
2026-07-23T16:00:00.000Z	44 \| good	8.375 \| good	33.561 \| good	39.572 \| good	0.776 \| good	13.103 \| good	0.267 \| good
2026-07-23T17:00:00.000Z	49 \| good	9.27 \| good	37.818 \| good	41.155 \| good	0.806 \| good	13.773 \| good	0.236 \| good
2026-07-23T18:00:00.000Z	49 \| good	9.277 \| good	38.916 \| good	46.464 \| good	0.77 \| good	10.71 \| good	0.264 \| good
2026-07-23T19:00:00.000Z	52 \| moderate	10.116 \| good	45.081 \| good	54.847 \| good	0.79 \| good	9.914 \| good	0.192 \| good
2026-07-23T20:00:00.000Z	64 \| moderate	9.549 \| good	40.391 \| good	59.461 \| fine	0.793 \| good	10.707 \| good	0.192 \| good
2026-07-23T21:00:00.000Z	74 \| moderate	7.413 \| good	32.995 \| good	62.235 \| fine	0.71 \| good	11.572 \| good	0.225 \| good
2026-07-23T21:00:00.000Z	77 \| moderate	8.59 \| good	36.353 \| good	63.071 \| fine	0.814 \| good	11.283 \| good	0.192 \| good
2026-07-23T22:00:00.000Z	84 \| moderate	7.58 \| good	33.55 \| good	65.084 \| fine	0.179 \| good	1.227 \| good	0.113 \| good
2026-07-23T23:00:00.000Z	67 \| moderate	7.78 \| good	34.205 \| good	59.613 \| fine	0.168 \| good	1.476 \| good	0.116 \| good
2026-07-24T00:00:00.000Z	61 \| moderate	5.675 \| good	24.646 \| good	57.54 \| fine	0.157 \| good	1.556 \| good	0.116 \| good
2026-07-24T01:00:00.000Z	51 \| moderate	4.574 \| good	19.919 \| good	54.548 \| good	0.148 \| good	1.769 \| good	0.117 \| good
2026-07-24T02:00:00.000Z	48 \| good	3.574 \| good	15.671 \| good	51.885 \| good	0.151 \| good	4.008 \| good	0.136 \| good
2026-07-24T03:00:00.000Z	46 \| good	4.117 \| good	18.555 \| good	50.21 \| good	0.169 \| good	7.668 \| good	0.165 \| good
2026-07-24T04:00:00.000Z	43 \| good	4.185 \| good	18.661 \| good	46.258 \| good	0.188 \| good	10.123 \| good	0.185 \| good
2026-07-24T05:00:00.000Z	45 \| good	3.106 \| good	13.791 \| good	49.066 \| good	0.193 \| good	11.679 \| good	0.198 \| good
2026-07-24T06:00:00.000Z	42 \| good	1.47 \| good	6.057 \| good	45.406 \| good	0.181 \| good	11.014 \| good	0.193 \| good
2026-07-24T07:00:00.000Z	40 \| good	2.613 \| good	10.312 \| good	42.508 \| good	0.162 \| good	9.372 \| good	0.18 \| good
2026-07-24T08:00:00.000Z	39 \| good	2.933 \| good	12.211 \| good	41.908 \| good	0.152 \| good	8.454 \| good	0.172 \| good
2026-07-24T09:00:00.000Z	41 \| good	3.243 \| good	14.046 \| good	43.809 \| good	0.135 \| good	7.572 \| good	0.164 \| good
2026-07-24T10:00:00.000Z	38 \| good	4.631 \| good	19.923 \| good	40.602 \| good	0.119 \| good	6.749 \| good	0.156 \| good
2026-07-24T11:00:00.000Z	33 \| good	5.748 \| good	24.996 \| good	35.113 \| good	0.103 \| good	6.129 \| good	0.149 \| good
2026-07-24T12:00:00.000Z	29 \| good	5.458 \| good	23.212 \| good	31.211 \| good	0.088 \| good	5.38 \| good	0.145 \| good
2026-07-24T13:00:00.000Z	38 \| good	6.558 \| good	29.009 \| good	30.778 \| good	0.079 \| good	4.067 \| good	0.143 \| good
2026-07-24T14:00:00.000Z	44 \| good	7.743 \| good	33.983 \| good	39.192 \| good	0.093 \| good	3.276 \| good	0.142 \| good
2026-07-24T15:00:00.000Z	48 \| good	7.403 \| good	32.765 \| good	51.88 \| good	0.126 \| good	2.305 \| good	0.132 \| good
2026-07-24T16:00:00.000Z	61 \| moderate	8.197 \| good	35.834 \| good	57.712 \| fine	0.193 \| good	1.327 \| good	0.123 \| good
2026-07-24T17:00:00.000Z	71 \| moderate	7.429 \| good	32.793 \| good	60.812 \| fine	0.196 \| good	0.735 \| good	0.118 \| good
2026-07-24T18:00:00.000Z	77 \| moderate	6.558 \| good	29.597 \| good	62.507 \| fine	0.193 \| good	0.513 \| good	0.118 \| good
2026-07-24T19:00:00.000Z	74 \| moderate	7.214 \| good	31.901 \| good	62.276 \| fine	0.19 \| good	0.444 \| good	0.118 \| good
2026-07-24T20:00:00.000Z	80 \| moderate	9.42 \| good	42.005 \| good	64.027 \| fine	0.19 \| good	0.427 \| good	0.119 \| good
2026-07-24T21:00:00.000Z	80 \| moderate	10.16 \| good	44.927 \| good	64.128 \| fine	0.19 \| good	0.465 \| good	0.119 \| good
2026-07-24T22:00:00.000Z	74 \| moderate	8.748 \| good	38.016 \| good	61.982 \| fine	0.195 \| good	0.612 \| good	0.119 \| good
2026-07-24T23:00:00.000Z	71 \| moderate	7.951 \| good	34.673 \| good	61.405 \| fine	0.204 \| good	0.915 \| good	0.121 \| good
2026-07-25T00:00:00.000Z	58 \| moderate	4.771 \| good	20.773 \| good	57.059 \| fine	0.202 \| good	1.603 \| good	0.129 \| good
2026-07-25T01:00:00.000Z	58 \| moderate	7.017 \| good	30.778 \| good	57.097 \| fine	0.212 \| good	1.955 \| good	0.131 \| good
2026-07-25T02:00:00.000Z	54 \| moderate	6.929 \| good	30.721 \| good	55.671 \| fine	0.184 \| good	3.256 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	49 \| good	5.038 \| good	21.689 \| good	52.974 \| good	0.176 \| good	4.782 \| good	0.152 \| good
2026-07-25T04:00:00.000Z	47 \| good	4.34 \| good	18.756 \| good	50.757 \| good	0.169 \| good	5.572 \| good	0.158 \| good
2026-07-25T05:00:00.000Z	47 \| good	4.279 \| good	18.902 \| good	50.68 \| good	0.162 \| good	6.158 \| good	0.163 \| good
2026-07-25T06:00:00.000Z	45 \| good	4.176 \| good	18.055 \| good	48.789 \| good	0.155 \| good	6.617 \| good	0.168 \| good
2026-07-25T07:00:00.000Z	44 \| good	4.496 \| good	19.077 \| good	47.347 \| good	0.145 \| good	6.811 \| good	0.17 \| good
2026-07-25T08:00:00.000Z	41 \| good	5.126 \| good	21.993 \| good	44.32 \| good	0.133 \| good	6.962 \| good	0.171 \| good
2026-07-25T09:00:00.000Z	39 \| good	5.399 \| good	22.899 \| good	41.674 \| good	0.119 \| good	7.064 \| good	0.171 \| good
2026-07-25T10:00:00.000Z	39 \| good	6.676 \| good	29.737 \| good	41.576 \| good	0.113 \| good	7.071 \| good	0.17 \| good
2026-07-25T11:00:00.000Z	49 \| good	8.631 \| good	37.949 \| good	35.445 \| good	0.11 \| good	6.961 \| good	0.168 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.991 \| good	34.993 \| good	31.922 \| good	0.107 \| good	6.492 \| good	0.166 \| good
2026-07-25T13:00:00.000Z	49 \| good	8.937 \| good	39.043 \| good	34.023 \| good	0.103 \| good	4.969 \| good	0.161 \| good
2026-07-25T14:00:00.000Z	49 \| good	9.079 \| good	40.673 \| good	44.506 \| good	0.121 \| good	3.952 \| good	0.161 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	8.383 \| good	36.661 \| good	56.404 \| fine	0.151 \| good	2.033 \| good	0.139 \| good
2026-07-25T16:00:00.000Z	84 \| moderate	9.308 \| good	41.472 \| good	65.036 \| fine	0.209 \| good	1.343 \| good	0.13 \| good
2026-07-25T17:00:00.000Z	100 \| moderate	8.476 \| good	36.827 \| good	69.724 \| fine	0.27 \| good	0.971 \| good	0.127 \| good
2026-07-25T18:00:00.000Z	101 \| sensitive	7.124 \| good	31.728 \| good	70.981 \| fine	0.263 \| good	0.702 \| good	0.125 \| good
2026-07-25T19:00:00.000Z	112 \| sensitive	7.13 \| good	31.806 \| good	73.783 \| moderate	0.232 \| good	0.561 \| good	0.122 \| good
2026-07-25T20:00:00.000Z	126 \| sensitive	8.044 \| good	34.955 \| good	77.616 \| moderate	0.201 \| good	0.542 \| good	0.119 \| good
2026-07-25T21:00:00.000Z	112 \| sensitive	8.466 \| good	36.987 \| good	73.581 \| moderate	0.178 \| good	0.701 \| good	0.117 \| good

Louisville, Colorado live air quality index now

Major air pollutants in Louisville, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Louisville, Colorado air quality map: Track AQI near you

Air quality in nearby cities

Lafayette, Colorado

Superior, Colorado

Broomfield, Colorado

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Boulder, Colorado

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Frequently asked questions

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What is the current concentration of PM2.5 in Louisville, Colorado?

What is the current concentration of PM10 in Louisville, Colorado?

What is the current concentration of carbon monoxide (CO) in Louisville, Colorado?

What is the current concentration of sulfur dioxide (SO2) in Louisville, Colorado?

What is the current concentration of ozone (O3) in Louisville, Colorado?

What is the current concentration of nitrogen dioxide (NO2) in Louisville, Colorado?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Louisville, Colorado?

What is the current concentration of PM₁₀ in Louisville, Colorado?

What is the current concentration of sulfur dioxide (SO₂) in Louisville, Colorado?

What is the current concentration of ozone (O₃) in Louisville, Colorado?

What is the current concentration of nitrogen dioxide (NO₂) in Louisville, Colorado?