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

Currently, Highlands Ranch, Colorado has a sulfur dioxide (SO2) concentration of 0.884 ppb.

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

The current ozone (O3) level in Highlands Ranch, Colorado at the moment is 64.545 ppm.

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

Nitrogen dioxide (NO2) level in Highlands Ranch, Colorado at the moment is 12.308 ppb.

Live air quality index in Highlands Ranch, Colorado today

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

PM2.5 levels in Highlands Ranch, Colorado are currently 7.358 μg/m3.

Q: What is the PM10 level in Highlands Ranch, Colorado at the moment?

The PM10 concentration in Highlands Ranch, Colorado is 31.883 μg/m3 at the moment.

Stay updated with real-time air quality in Highlands Ranch, 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

Highlands Ranch, Colorado

Last updated: ... (Local time)

Major air pollutants in Highlands Ranch, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.36 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

31.88 μg/m³

155

255

425

605+

Ozone (O₃)

64.55 ppb

201

201+

Sulfur Dioxide (SO₂)

0.88 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

12.31 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Highlands Ranch, Colorado

Get Live Pollen Counts

Highlands Ranch, Colorado

Scroll To Air Quality Map

Track live Highlands Ranch, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T22:00:00.000Z	108 \| sensitive	10.593 \| good	49.406 \| good	72.871 \| moderate	0.678 \| good	4.703 \| good	0.187 \| good
2026-07-21T23:00:00.000Z	101 \| sensitive	9.935 \| good	45.477 \| good	70.905 \| fine	0.62 \| good	4.232 \| good	0.187 \| good
2026-07-22T00:00:00.000Z	97 \| moderate	8.279 \| good	42.205 \| good	68.988 \| fine	0.636 \| good	5.304 \| good	0.195 \| good
2026-07-22T01:00:00.000Z	87 \| moderate	6.948 \| good	40.008 \| good	65.831 \| fine	0.809 \| good	5.987 \| good	0.188 \| good
2026-07-22T02:00:00.000Z	77 \| moderate	6.337 \| good	29.147 \| good	62.74 \| fine	0.481 \| good	9.982 \| good	0.279 \| good
2026-07-22T03:00:00.000Z	67 \| moderate	6.141 \| good	27.68 \| good	59.637 \| fine	0.451 \| good	12.311 \| good	0.279 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	5.949 \| good	27.334 \| good	57.398 \| fine	0.502 \| good	9.392 \| good	0.311 \| good
2026-07-22T05:00:00.000Z	61 \| moderate	6.285 \| good	35.481 \| good	57.933 \| fine	0.689 \| good	8.082 \| good	0.279 \| good
2026-07-22T06:00:00.000Z	58 \| moderate	6.917 \| good	31.279 \| good	57.305 \| fine	0.429 \| good	5.513 \| good	0.188 \| good
2026-07-22T07:00:00.000Z	58 \| moderate	5.906 \| good	41.158 \| good	57.134 \| fine	0.546 \| good	6.97 \| good	0.179 \| good
2026-07-22T08:00:00.000Z	54 \| moderate	5.51 \| good	22.444 \| good	56.22 \| fine	0.611 \| good	6.977 \| good	0.179 \| good
2026-07-22T09:00:00.000Z	51 \| moderate	6.535 \| good	20.798 \| good	55.288 \| fine	0.402 \| good	8.34 \| good	0.179 \| good
2026-07-22T10:00:00.000Z	49 \| good	6.507 \| good	35.464 \| good	53.407 \| good	0.443 \| good	10.284 \| good	0.179 \| good
2026-07-22T11:00:00.000Z	50 \| good	6.79 \| good	30.215 \| good	54.05 \| good	0.618 \| good	11.349 \| good	0.225 \| good
2026-07-22T12:00:00.000Z	48 \| good	4.889 \| good	20.307 \| good	52.104 \| good	0.549 \| good	15.22 \| good	0.332 \| good
2026-07-22T13:00:00.000Z	47 \| good	4.956 \| good	20.77 \| good	51.29 \| good	0.533 \| good	20.156 \| good	0.332 \| good
2026-07-22T14:00:00.000Z	47 \| good	5.657 \| good	40.944 \| good	51.261 \| good	0.717 \| good	18.88 \| good	0.411 \| good
2026-07-22T15:00:00.000Z	47 \| good	6 \| good	27.789 \| good	50.681 \| good	1.163 \| good	22.879 \| good	0.411 \| good
2026-07-22T16:00:00.000Z	96 \| moderate	32.934 \| fine	44.557 \| good	55.47 \| fine	0.691 \| good	18.099 \| good	0.332 \| good
2026-07-22T17:00:00.000Z	64 \| moderate	9.692 \| good	34.918 \| good	58.736 \| fine	0.946 \| good	12.215 \| good	0.241 \| good
2026-07-22T18:00:00.000Z	80 \| moderate	9.561 \| good	39.407 \| good	63.83 \| fine	0.929 \| good	8.49 \| good	0.246 \| good
2026-07-22T19:00:00.000Z	97 \| moderate	8.961 \| good	31.836 \| good	68.887 \| fine	0.726 \| good	9.89 \| good	0.246 \| good
2026-07-22T20:00:00.000Z	108 \| sensitive	7.655 \| good	34.093 \| good	72.634 \| moderate	0.643 \| good	6.998 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	122 \| sensitive	9.825 \| good	38.607 \| good	76.61 \| moderate	0.718 \| good	13.357 \| good	0.328 \| good
2026-07-22T22:00:00.000Z	105 \| sensitive	10.27 \| good	36.438 \| good	72.089 \| moderate	0.713 \| good	22.208 \| good	0.386 \| good
2026-07-22T23:00:00.000Z	101 \| sensitive	9.413 \| good	41.4 \| good	70.836 \| fine	0.607 \| good	11.792 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	90 \| moderate	8.53 \| good	39.505 \| good	66.885 \| fine	0.532 \| good	10.734 \| good	0.246 \| good
2026-07-23T01:00:00.000Z	77 \| moderate	9.248 \| good	36.791 \| good	62.735 \| fine	0.497 \| good	17.219 \| good	0.378 \| good
2026-07-23T02:00:00.000Z	71 \| moderate	7.993 \| good	31.424 \| good	60.537 \| fine	0.523 \| good	19.998 \| good	0.378 \| good
2026-07-23T03:00:00.000Z	49 \| good	7.063 \| good	30.825 \| good	53.446 \| good	0.298 \| good	6.746 \| good	0.159 \| good
2026-07-23T04:00:00.000Z	47 \| good	5.368 \| good	36.839 \| good	50.929 \| good	0.614 \| good	20.775 \| good	0.332 \| good
2026-07-23T05:00:00.000Z	43 \| good	5.631 \| good	24.256 \| good	46.199 \| good	0.549 \| good	19.314 \| good	0.238 \| good
2026-07-23T06:00:00.000Z	43 \| good	4.381 \| good	18.772 \| good	45.846 \| good	0.484 \| good	12.204 \| good	0.191 \| good
2026-07-23T07:00:00.000Z	41 \| good	4.121 \| good	15.756 \| good	44.328 \| good	0.414 \| good	8.933 \| good	0.145 \| good
2026-07-23T08:00:00.000Z	38 \| good	4.055 \| good	15.019 \| good	41.215 \| good	0.495 \| good	10.97 \| good	0.191 \| good
2026-07-23T09:00:00.000Z	33 \| good	4.368 \| good	12.609 \| good	36.475 \| good	0.648 \| good	14.457 \| good	0.191 \| good
2026-07-23T10:00:00.000Z	33 \| good	4.004 \| good	15.117 \| good	36.347 \| good	0.718 \| good	16.004 \| good	0.191 \| good
2026-07-23T11:00:00.000Z	33 \| good	4.556 \| good	21.894 \| good	36.098 \| good	0.755 \| good	17.953 \| good	0.23 \| good
2026-07-23T12:00:00.000Z	31 \| good	4.435 \| good	17.187 \| good	32.949 \| good	0.594 \| good	20.48 \| good	0.227 \| good
2026-07-23T13:00:00.000Z	31 \| good	4.603 \| good	16.811 \| good	33.679 \| good	0.651 \| good	23.72 \| good	0.448 \| good
2026-07-23T14:00:00.000Z	33 \| good	6.453 \| good	32.11 \| good	33.416 \| good	0.651 \| good	22.927 \| good	0.448 \| good
2026-07-23T15:00:00.000Z	37 \| good	5.385 \| good	25.839 \| good	40.286 \| good	0.648 \| good	20.018 \| good	0.374 \| good
2026-07-23T16:00:00.000Z	44 \| good	7.657 \| good	31.958 \| good	43.206 \| good	0.859 \| good	16.785 \| good	0.32 \| good
2026-07-23T17:00:00.000Z	46 \| good	8.316 \| good	29.267 \| good	50.296 \| good	0.883 \| good	16.663 \| good	0.285 \| good
2026-07-23T18:00:00.000Z	58 \| moderate	8.668 \| good	38.246 \| good	57.452 \| fine	0.85 \| good	12.002 \| good	0.318 \| good
2026-07-23T19:00:00.000Z	77 \| moderate	7.814 \| good	27.584 \| good	63.43 \| fine	0.9 \| good	11.666 \| good	0.193 \| good
2026-07-23T20:00:00.000Z	84 \| moderate	7.358 \| good	31.883 \| good	64.545 \| fine	0.884 \| good	12.308 \| good	0.193 \| good
2026-07-23T21:00:00.000Z	90 \| moderate	7.329 \| good	31.742 \| good	67.406 \| fine	0.768 \| good	13.409 \| good	0.244 \| good
2026-07-23T21:00:00.000Z	84 \| moderate	7.358 \| good	31.883 \| good	64.545 \| fine	0.884 \| good	12.308 \| good	0.193 \| good
2026-07-23T22:00:00.000Z	46 \| good	7.448 \| good	32.511 \| good	50.185 \| good	0.194 \| good	1.222 \| good	0.11 \| good
2026-07-23T23:00:00.000Z	49 \| good	5.857 \| good	25.493 \| good	52.835 \| good	0.206 \| good	1.471 \| good	0.112 \| good
2026-07-24T00:00:00.000Z	48 \| good	4.602 \| good	20.085 \| good	51.643 \| good	0.212 \| good	1.716 \| good	0.114 \| good
2026-07-24T01:00:00.000Z	61 \| moderate	5.89 \| good	25.738 \| good	57.578 \| fine	0.226 \| good	2.138 \| good	0.116 \| good
2026-07-24T02:00:00.000Z	61 \| moderate	8.57 \| good	37.579 \| good	58.299 \| fine	0.247 \| good	3.981 \| good	0.128 \| good
2026-07-24T03:00:00.000Z	52 \| moderate	10.286 \| good	45.679 \| good	51.125 \| good	0.284 \| good	8.165 \| good	0.156 \| good
2026-07-24T04:00:00.000Z	54 \| moderate	10.98 \| good	49.014 \| good	47.418 \| good	0.302 \| good	10.415 \| good	0.172 \| good
2026-07-24T05:00:00.000Z	54 \| moderate	11.183 \| good	49.698 \| good	44.462 \| good	0.294 \| good	12.401 \| good	0.187 \| good
2026-07-24T06:00:00.000Z	44 \| good	7.95 \| good	35.136 \| good	45.939 \| good	0.252 \| good	12.644 \| good	0.192 \| good
2026-07-24T07:00:00.000Z	43 \| good	3.659 \| good	16.259 \| good	46.401 \| good	0.207 \| good	10.777 \| good	0.182 \| good
2026-07-24T08:00:00.000Z	44 \| good	2.466 \| good	10.091 \| good	47.547 \| good	0.176 \| good	9.472 \| good	0.174 \| good
2026-07-24T09:00:00.000Z	41 \| good	2.265 \| good	9.084 \| good	44.39 \| good	0.15 \| good	8.426 \| good	0.165 \| good
2026-07-24T10:00:00.000Z	43 \| good	2.783 \| good	11.323 \| good	45.825 \| good	0.128 \| good	7.687 \| good	0.159 \| good
2026-07-24T11:00:00.000Z	38 \| good	3.417 \| good	15.258 \| good	41.417 \| good	0.111 \| good	7.218 \| good	0.153 \| good
2026-07-24T12:00:00.000Z	36 \| good	4.68 \| good	20.204 \| good	38.555 \| good	0.096 \| good	6.445 \| good	0.15 \| good
2026-07-24T13:00:00.000Z	36 \| good	5.133 \| good	22.029 \| good	38.992 \| good	0.091 \| good	4.881 \| good	0.145 \| good
2026-07-24T14:00:00.000Z	41 \| good	5.294 \| good	23.022 \| good	43.661 \| good	0.114 \| good	4.081 \| good	0.146 \| good
2026-07-24T15:00:00.000Z	49 \| good	5.93 \| good	26.764 \| good	52.929 \| good	0.163 \| good	2.805 \| good	0.128 \| good
2026-07-24T16:00:00.000Z	67 \| moderate	6.631 \| good	29.86 \| good	59.856 \| fine	0.242 \| good	1.361 \| good	0.118 \| good
2026-07-24T17:00:00.000Z	90 \| moderate	6.752 \| good	29.912 \| good	66.622 \| fine	0.228 \| good	0.741 \| good	0.119 \| good
2026-07-24T18:00:00.000Z	101 \| sensitive	6.441 \| good	28.913 \| good	70.914 \| fine	0.211 \| good	0.548 \| good	0.121 \| good
2026-07-24T19:00:00.000Z	105 \| sensitive	6.883 \| good	30.769 \| good	71.744 \| moderate	0.2 \| good	0.476 \| good	0.122 \| good
2026-07-24T20:00:00.000Z	115 \| sensitive	7.156 \| good	31.848 \| good	75.323 \| moderate	0.19 \| good	0.453 \| good	0.122 \| good
2026-07-24T21:00:00.000Z	115 \| sensitive	7.217 \| good	31.949 \| good	74.922 \| moderate	0.184 \| good	0.476 \| good	0.121 \| good
2026-07-24T22:00:00.000Z	101 \| sensitive	6.532 \| good	29.098 \| good	71.075 \| moderate	0.181 \| good	0.543 \| good	0.121 \| good
2026-07-24T23:00:00.000Z	80 \| moderate	6.774 \| good	30.091 \| good	64.389 \| fine	0.18 \| good	0.756 \| good	0.122 \| good
2026-07-25T00:00:00.000Z	49 \| good	8.318 \| good	36.569 \| good	52.812 \| good	0.19 \| good	1.379 \| good	0.127 \| good
2026-07-25T01:00:00.000Z	51 \| moderate	3.762 \| good	16.521 \| good	54.692 \| good	0.21 \| good	1.824 \| good	0.129 \| good
2026-07-25T02:00:00.000Z	64 \| moderate	6.189 \| good	27.461 \| good	59.36 \| fine	0.213 \| good	3.553 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	50 \| good	5.562 \| good	24.099 \| good	54.122 \| good	0.231 \| good	5.928 \| good	0.155 \| good
2026-07-25T04:00:00.000Z	45 \| good	4.689 \| good	20.364 \| good	49.128 \| good	0.243 \| good	7.493 \| good	0.166 \| good
2026-07-25T05:00:00.000Z	45 \| good	4.366 \| good	18.957 \| good	49.254 \| good	0.228 \| good	8.299 \| good	0.172 \| good
2026-07-25T06:00:00.000Z	49 \| good	4.458 \| good	18.946 \| good	53.131 \| good	0.203 \| good	8.696 \| good	0.176 \| good
2026-07-25T07:00:00.000Z	49 \| good	4.372 \| good	18.656 \| good	52.894 \| good	0.175 \| good	8.364 \| good	0.177 \| good
2026-07-25T08:00:00.000Z	48 \| good	4.025 \| good	17.557 \| good	52.186 \| good	0.155 \| good	7.791 \| good	0.173 \| good
2026-07-25T09:00:00.000Z	46 \| good	3.905 \| good	17.193 \| good	49.641 \| good	0.142 \| good	7.267 \| good	0.169 \| good
2026-07-25T10:00:00.000Z	45 \| good	3.898 \| good	17.177 \| good	48.709 \| good	0.137 \| good	6.823 \| good	0.164 \| good
2026-07-25T11:00:00.000Z	38 \| good	5.208 \| good	22.303 \| good	41.415 \| good	0.136 \| good	6.477 \| good	0.16 \| good
2026-07-25T12:00:00.000Z	40 \| good	5.735 \| good	24.813 \| good	43.071 \| good	0.134 \| good	5.973 \| good	0.156 \| good
2026-07-25T13:00:00.000Z	41 \| good	5.934 \| good	26.821 \| good	44.186 \| good	0.129 \| good	4.737 \| good	0.153 \| good
2026-07-25T14:00:00.000Z	44 \| good	6.05 \| good	27.1 \| good	48.105 \| good	0.155 \| good	3.926 \| good	0.153 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	5.745 \| good	25.057 \| good	56.174 \| fine	0.179 \| good	2.214 \| good	0.136 \| good
2026-07-25T16:00:00.000Z	77 \| moderate	5.785 \| good	24.866 \| good	62.963 \| fine	0.207 \| good	1.263 \| good	0.127 \| good
2026-07-25T17:00:00.000Z	80 \| moderate	5.756 \| good	25.025 \| good	63.835 \| fine	0.195 \| good	0.71 \| good	0.121 \| good
2026-07-25T18:00:00.000Z	87 \| moderate	5.36 \| good	23.038 \| good	66.302 \| fine	0.161 \| good	0.472 \| good	0.116 \| good
2026-07-25T19:00:00.000Z	97 \| moderate	5.466 \| good	23.306 \| good	69.022 \| fine	0.138 \| good	0.385 \| good	0.113 \| good
2026-07-25T20:00:00.000Z	100 \| moderate	5.832 \| good	25.152 \| good	70.443 \| fine	0.124 \| good	0.377 \| good	0.111 \| good
2026-07-25T21:00:00.000Z	93 \| moderate	6.503 \| good	29.076 \| good	67.578 \| fine	0.117 \| good	0.434 \| good	0.11 \| good

Highlands Ranch

Get reliable air quality data to drive your business

Highlands Ranch, 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

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Frequently asked questions

How often is air quality information updated for Highlands Ranch, Colorado?

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

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

In the past 24 hours, the air quality in Highlands Ranch, Colorado was at its worst at 09:00:00 on 2026-07-22.

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

In the last 24 hours, the best air quality in Highlands Ranch, Colorado was observed at 01:00:00 on 2026-07-23.

What is the AQI in Highlands Ranch, Colorado right now?

As of now, the AQI in Highlands Ranch, Colorado is 84, indicating Moderate conditions.

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

Highlands Ranch, Colorado air has the highest levels of O3.

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

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

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

PM_2.5 levels in Highlands Ranch, Colorado are currently 7.358 μg/m³.

What is the PM₁₀ level in Highlands Ranch, Colorado at the moment?

The PM₁₀ concentration in Highlands Ranch, Colorado is 31.883 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Highlands Ranch, Colorado is 0.193 ppm.

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

Currently, Highlands Ranch, Colorado has a sulfur dioxide (SO₂) concentration of 0.884 ppb.

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

The current ozone (O₃) level in Highlands Ranch, Colorado at the moment is 64.545 ppm.

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

Nitrogen dioxide (NO₂) level in Highlands Ranch, Colorado at the moment is 12.308 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T22:00:00.000Z	108 \| sensitive	10.593 \| good	49.406 \| good	72.871 \| moderate	0.678 \| good	4.703 \| good	0.187 \| good
2026-07-21T23:00:00.000Z	101 \| sensitive	9.935 \| good	45.477 \| good	70.905 \| fine	0.62 \| good	4.232 \| good	0.187 \| good
2026-07-22T00:00:00.000Z	97 \| moderate	8.279 \| good	42.205 \| good	68.988 \| fine	0.636 \| good	5.304 \| good	0.195 \| good
2026-07-22T01:00:00.000Z	87 \| moderate	6.948 \| good	40.008 \| good	65.831 \| fine	0.809 \| good	5.987 \| good	0.188 \| good
2026-07-22T02:00:00.000Z	77 \| moderate	6.337 \| good	29.147 \| good	62.74 \| fine	0.481 \| good	9.982 \| good	0.279 \| good
2026-07-22T03:00:00.000Z	67 \| moderate	6.141 \| good	27.68 \| good	59.637 \| fine	0.451 \| good	12.311 \| good	0.279 \| good
2026-07-22T04:00:00.000Z	58 \| moderate	5.949 \| good	27.334 \| good	57.398 \| fine	0.502 \| good	9.392 \| good	0.311 \| good
2026-07-22T05:00:00.000Z	61 \| moderate	6.285 \| good	35.481 \| good	57.933 \| fine	0.689 \| good	8.082 \| good	0.279 \| good
2026-07-22T06:00:00.000Z	58 \| moderate	6.917 \| good	31.279 \| good	57.305 \| fine	0.429 \| good	5.513 \| good	0.188 \| good
2026-07-22T07:00:00.000Z	58 \| moderate	5.906 \| good	41.158 \| good	57.134 \| fine	0.546 \| good	6.97 \| good	0.179 \| good
2026-07-22T08:00:00.000Z	54 \| moderate	5.51 \| good	22.444 \| good	56.22 \| fine	0.611 \| good	6.977 \| good	0.179 \| good
2026-07-22T09:00:00.000Z	51 \| moderate	6.535 \| good	20.798 \| good	55.288 \| fine	0.402 \| good	8.34 \| good	0.179 \| good
2026-07-22T10:00:00.000Z	49 \| good	6.507 \| good	35.464 \| good	53.407 \| good	0.443 \| good	10.284 \| good	0.179 \| good
2026-07-22T11:00:00.000Z	50 \| good	6.79 \| good	30.215 \| good	54.05 \| good	0.618 \| good	11.349 \| good	0.225 \| good
2026-07-22T12:00:00.000Z	48 \| good	4.889 \| good	20.307 \| good	52.104 \| good	0.549 \| good	15.22 \| good	0.332 \| good
2026-07-22T13:00:00.000Z	47 \| good	4.956 \| good	20.77 \| good	51.29 \| good	0.533 \| good	20.156 \| good	0.332 \| good
2026-07-22T14:00:00.000Z	47 \| good	5.657 \| good	40.944 \| good	51.261 \| good	0.717 \| good	18.88 \| good	0.411 \| good
2026-07-22T15:00:00.000Z	47 \| good	6 \| good	27.789 \| good	50.681 \| good	1.163 \| good	22.879 \| good	0.411 \| good
2026-07-22T16:00:00.000Z	96 \| moderate	32.934 \| fine	44.557 \| good	55.47 \| fine	0.691 \| good	18.099 \| good	0.332 \| good
2026-07-22T17:00:00.000Z	64 \| moderate	9.692 \| good	34.918 \| good	58.736 \| fine	0.946 \| good	12.215 \| good	0.241 \| good
2026-07-22T18:00:00.000Z	80 \| moderate	9.561 \| good	39.407 \| good	63.83 \| fine	0.929 \| good	8.49 \| good	0.246 \| good
2026-07-22T19:00:00.000Z	97 \| moderate	8.961 \| good	31.836 \| good	68.887 \| fine	0.726 \| good	9.89 \| good	0.246 \| good
2026-07-22T20:00:00.000Z	108 \| sensitive	7.655 \| good	34.093 \| good	72.634 \| moderate	0.643 \| good	6.998 \| good	0.2 \| good
2026-07-22T21:00:00.000Z	122 \| sensitive	9.825 \| good	38.607 \| good	76.61 \| moderate	0.718 \| good	13.357 \| good	0.328 \| good
2026-07-22T22:00:00.000Z	105 \| sensitive	10.27 \| good	36.438 \| good	72.089 \| moderate	0.713 \| good	22.208 \| good	0.386 \| good
2026-07-22T23:00:00.000Z	101 \| sensitive	9.413 \| good	41.4 \| good	70.836 \| fine	0.607 \| good	11.792 \| good	0.2 \| good
2026-07-23T00:00:00.000Z	90 \| moderate	8.53 \| good	39.505 \| good	66.885 \| fine	0.532 \| good	10.734 \| good	0.246 \| good
2026-07-23T01:00:00.000Z	77 \| moderate	9.248 \| good	36.791 \| good	62.735 \| fine	0.497 \| good	17.219 \| good	0.378 \| good
2026-07-23T02:00:00.000Z	71 \| moderate	7.993 \| good	31.424 \| good	60.537 \| fine	0.523 \| good	19.998 \| good	0.378 \| good
2026-07-23T03:00:00.000Z	49 \| good	7.063 \| good	30.825 \| good	53.446 \| good	0.298 \| good	6.746 \| good	0.159 \| good
2026-07-23T04:00:00.000Z	47 \| good	5.368 \| good	36.839 \| good	50.929 \| good	0.614 \| good	20.775 \| good	0.332 \| good
2026-07-23T05:00:00.000Z	43 \| good	5.631 \| good	24.256 \| good	46.199 \| good	0.549 \| good	19.314 \| good	0.238 \| good
2026-07-23T06:00:00.000Z	43 \| good	4.381 \| good	18.772 \| good	45.846 \| good	0.484 \| good	12.204 \| good	0.191 \| good
2026-07-23T07:00:00.000Z	41 \| good	4.121 \| good	15.756 \| good	44.328 \| good	0.414 \| good	8.933 \| good	0.145 \| good
2026-07-23T08:00:00.000Z	38 \| good	4.055 \| good	15.019 \| good	41.215 \| good	0.495 \| good	10.97 \| good	0.191 \| good
2026-07-23T09:00:00.000Z	33 \| good	4.368 \| good	12.609 \| good	36.475 \| good	0.648 \| good	14.457 \| good	0.191 \| good
2026-07-23T10:00:00.000Z	33 \| good	4.004 \| good	15.117 \| good	36.347 \| good	0.718 \| good	16.004 \| good	0.191 \| good
2026-07-23T11:00:00.000Z	33 \| good	4.556 \| good	21.894 \| good	36.098 \| good	0.755 \| good	17.953 \| good	0.23 \| good
2026-07-23T12:00:00.000Z	31 \| good	4.435 \| good	17.187 \| good	32.949 \| good	0.594 \| good	20.48 \| good	0.227 \| good
2026-07-23T13:00:00.000Z	31 \| good	4.603 \| good	16.811 \| good	33.679 \| good	0.651 \| good	23.72 \| good	0.448 \| good
2026-07-23T14:00:00.000Z	33 \| good	6.453 \| good	32.11 \| good	33.416 \| good	0.651 \| good	22.927 \| good	0.448 \| good
2026-07-23T15:00:00.000Z	37 \| good	5.385 \| good	25.839 \| good	40.286 \| good	0.648 \| good	20.018 \| good	0.374 \| good
2026-07-23T16:00:00.000Z	44 \| good	7.657 \| good	31.958 \| good	43.206 \| good	0.859 \| good	16.785 \| good	0.32 \| good
2026-07-23T17:00:00.000Z	46 \| good	8.316 \| good	29.267 \| good	50.296 \| good	0.883 \| good	16.663 \| good	0.285 \| good
2026-07-23T18:00:00.000Z	58 \| moderate	8.668 \| good	38.246 \| good	57.452 \| fine	0.85 \| good	12.002 \| good	0.318 \| good
2026-07-23T19:00:00.000Z	77 \| moderate	7.814 \| good	27.584 \| good	63.43 \| fine	0.9 \| good	11.666 \| good	0.193 \| good
2026-07-23T20:00:00.000Z	84 \| moderate	7.358 \| good	31.883 \| good	64.545 \| fine	0.884 \| good	12.308 \| good	0.193 \| good
2026-07-23T21:00:00.000Z	90 \| moderate	7.329 \| good	31.742 \| good	67.406 \| fine	0.768 \| good	13.409 \| good	0.244 \| good
2026-07-23T21:00:00.000Z	84 \| moderate	7.358 \| good	31.883 \| good	64.545 \| fine	0.884 \| good	12.308 \| good	0.193 \| good
2026-07-23T22:00:00.000Z	46 \| good	7.448 \| good	32.511 \| good	50.185 \| good	0.194 \| good	1.222 \| good	0.11 \| good
2026-07-23T23:00:00.000Z	49 \| good	5.857 \| good	25.493 \| good	52.835 \| good	0.206 \| good	1.471 \| good	0.112 \| good
2026-07-24T00:00:00.000Z	48 \| good	4.602 \| good	20.085 \| good	51.643 \| good	0.212 \| good	1.716 \| good	0.114 \| good
2026-07-24T01:00:00.000Z	61 \| moderate	5.89 \| good	25.738 \| good	57.578 \| fine	0.226 \| good	2.138 \| good	0.116 \| good
2026-07-24T02:00:00.000Z	61 \| moderate	8.57 \| good	37.579 \| good	58.299 \| fine	0.247 \| good	3.981 \| good	0.128 \| good
2026-07-24T03:00:00.000Z	52 \| moderate	10.286 \| good	45.679 \| good	51.125 \| good	0.284 \| good	8.165 \| good	0.156 \| good
2026-07-24T04:00:00.000Z	54 \| moderate	10.98 \| good	49.014 \| good	47.418 \| good	0.302 \| good	10.415 \| good	0.172 \| good
2026-07-24T05:00:00.000Z	54 \| moderate	11.183 \| good	49.698 \| good	44.462 \| good	0.294 \| good	12.401 \| good	0.187 \| good
2026-07-24T06:00:00.000Z	44 \| good	7.95 \| good	35.136 \| good	45.939 \| good	0.252 \| good	12.644 \| good	0.192 \| good
2026-07-24T07:00:00.000Z	43 \| good	3.659 \| good	16.259 \| good	46.401 \| good	0.207 \| good	10.777 \| good	0.182 \| good
2026-07-24T08:00:00.000Z	44 \| good	2.466 \| good	10.091 \| good	47.547 \| good	0.176 \| good	9.472 \| good	0.174 \| good
2026-07-24T09:00:00.000Z	41 \| good	2.265 \| good	9.084 \| good	44.39 \| good	0.15 \| good	8.426 \| good	0.165 \| good
2026-07-24T10:00:00.000Z	43 \| good	2.783 \| good	11.323 \| good	45.825 \| good	0.128 \| good	7.687 \| good	0.159 \| good
2026-07-24T11:00:00.000Z	38 \| good	3.417 \| good	15.258 \| good	41.417 \| good	0.111 \| good	7.218 \| good	0.153 \| good
2026-07-24T12:00:00.000Z	36 \| good	4.68 \| good	20.204 \| good	38.555 \| good	0.096 \| good	6.445 \| good	0.15 \| good
2026-07-24T13:00:00.000Z	36 \| good	5.133 \| good	22.029 \| good	38.992 \| good	0.091 \| good	4.881 \| good	0.145 \| good
2026-07-24T14:00:00.000Z	41 \| good	5.294 \| good	23.022 \| good	43.661 \| good	0.114 \| good	4.081 \| good	0.146 \| good
2026-07-24T15:00:00.000Z	49 \| good	5.93 \| good	26.764 \| good	52.929 \| good	0.163 \| good	2.805 \| good	0.128 \| good
2026-07-24T16:00:00.000Z	67 \| moderate	6.631 \| good	29.86 \| good	59.856 \| fine	0.242 \| good	1.361 \| good	0.118 \| good
2026-07-24T17:00:00.000Z	90 \| moderate	6.752 \| good	29.912 \| good	66.622 \| fine	0.228 \| good	0.741 \| good	0.119 \| good
2026-07-24T18:00:00.000Z	101 \| sensitive	6.441 \| good	28.913 \| good	70.914 \| fine	0.211 \| good	0.548 \| good	0.121 \| good
2026-07-24T19:00:00.000Z	105 \| sensitive	6.883 \| good	30.769 \| good	71.744 \| moderate	0.2 \| good	0.476 \| good	0.122 \| good
2026-07-24T20:00:00.000Z	115 \| sensitive	7.156 \| good	31.848 \| good	75.323 \| moderate	0.19 \| good	0.453 \| good	0.122 \| good
2026-07-24T21:00:00.000Z	115 \| sensitive	7.217 \| good	31.949 \| good	74.922 \| moderate	0.184 \| good	0.476 \| good	0.121 \| good
2026-07-24T22:00:00.000Z	101 \| sensitive	6.532 \| good	29.098 \| good	71.075 \| moderate	0.181 \| good	0.543 \| good	0.121 \| good
2026-07-24T23:00:00.000Z	80 \| moderate	6.774 \| good	30.091 \| good	64.389 \| fine	0.18 \| good	0.756 \| good	0.122 \| good
2026-07-25T00:00:00.000Z	49 \| good	8.318 \| good	36.569 \| good	52.812 \| good	0.19 \| good	1.379 \| good	0.127 \| good
2026-07-25T01:00:00.000Z	51 \| moderate	3.762 \| good	16.521 \| good	54.692 \| good	0.21 \| good	1.824 \| good	0.129 \| good
2026-07-25T02:00:00.000Z	64 \| moderate	6.189 \| good	27.461 \| good	59.36 \| fine	0.213 \| good	3.553 \| good	0.141 \| good
2026-07-25T03:00:00.000Z	50 \| good	5.562 \| good	24.099 \| good	54.122 \| good	0.231 \| good	5.928 \| good	0.155 \| good
2026-07-25T04:00:00.000Z	45 \| good	4.689 \| good	20.364 \| good	49.128 \| good	0.243 \| good	7.493 \| good	0.166 \| good
2026-07-25T05:00:00.000Z	45 \| good	4.366 \| good	18.957 \| good	49.254 \| good	0.228 \| good	8.299 \| good	0.172 \| good
2026-07-25T06:00:00.000Z	49 \| good	4.458 \| good	18.946 \| good	53.131 \| good	0.203 \| good	8.696 \| good	0.176 \| good
2026-07-25T07:00:00.000Z	49 \| good	4.372 \| good	18.656 \| good	52.894 \| good	0.175 \| good	8.364 \| good	0.177 \| good
2026-07-25T08:00:00.000Z	48 \| good	4.025 \| good	17.557 \| good	52.186 \| good	0.155 \| good	7.791 \| good	0.173 \| good
2026-07-25T09:00:00.000Z	46 \| good	3.905 \| good	17.193 \| good	49.641 \| good	0.142 \| good	7.267 \| good	0.169 \| good
2026-07-25T10:00:00.000Z	45 \| good	3.898 \| good	17.177 \| good	48.709 \| good	0.137 \| good	6.823 \| good	0.164 \| good
2026-07-25T11:00:00.000Z	38 \| good	5.208 \| good	22.303 \| good	41.415 \| good	0.136 \| good	6.477 \| good	0.16 \| good
2026-07-25T12:00:00.000Z	40 \| good	5.735 \| good	24.813 \| good	43.071 \| good	0.134 \| good	5.973 \| good	0.156 \| good
2026-07-25T13:00:00.000Z	41 \| good	5.934 \| good	26.821 \| good	44.186 \| good	0.129 \| good	4.737 \| good	0.153 \| good
2026-07-25T14:00:00.000Z	44 \| good	6.05 \| good	27.1 \| good	48.105 \| good	0.155 \| good	3.926 \| good	0.153 \| good
2026-07-25T15:00:00.000Z	54 \| moderate	5.745 \| good	25.057 \| good	56.174 \| fine	0.179 \| good	2.214 \| good	0.136 \| good
2026-07-25T16:00:00.000Z	77 \| moderate	5.785 \| good	24.866 \| good	62.963 \| fine	0.207 \| good	1.263 \| good	0.127 \| good
2026-07-25T17:00:00.000Z	80 \| moderate	5.756 \| good	25.025 \| good	63.835 \| fine	0.195 \| good	0.71 \| good	0.121 \| good
2026-07-25T18:00:00.000Z	87 \| moderate	5.36 \| good	23.038 \| good	66.302 \| fine	0.161 \| good	0.472 \| good	0.116 \| good
2026-07-25T19:00:00.000Z	97 \| moderate	5.466 \| good	23.306 \| good	69.022 \| fine	0.138 \| good	0.385 \| good	0.113 \| good
2026-07-25T20:00:00.000Z	100 \| moderate	5.832 \| good	25.152 \| good	70.443 \| fine	0.124 \| good	0.377 \| good	0.111 \| good
2026-07-25T21:00:00.000Z	93 \| moderate	6.503 \| good	29.076 \| good	67.578 \| fine	0.117 \| good	0.434 \| good	0.11 \| good

Live air quality index in Highlands Ranch, Colorado today

Major air pollutants in Highlands Ranch, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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

Air quality in nearby cities

Lone Tree, Colorado

Greenwood Village, Colorado

Littleton, Colorado

Centennial, Colorado

Columbine, Colorado

Castle Pines, Colorado

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Frequently asked questions

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

What is the PM₁₀ level in Highlands Ranch, Colorado at the moment?

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

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

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