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 1.266 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 50.173 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 26.269 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 16.257 μg/m3.

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

The PM10 concentration in Highlands Ranch, Colorado is 67.259 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)

15.86 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

71.40 μg/m³

155

255

425

605+

Ozone (O₃)

61.30 ppb

201

201+

Sulfur Dioxide (SO₂)

0.70 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

18.27 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 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
2026-08-08T21:00:00.000Z	90 \| moderate	17.213 \| fine	76.369 \| fine	67.16 \| fine	0.726 \| good	11.812 \| good	0.327 \| good
2026-08-08T22:00:00.000Z	84 \| moderate	16.095 \| fine	71.795 \| fine	65.366 \| fine	0.76 \| good	11.221 \| good	0.322 \| good
2026-08-08T23:00:00.000Z	84 \| moderate	14.933 \| fine	66.717 \| fine	65.408 \| fine	0.719 \| good	5.643 \| good	0.197 \| good
2026-08-09T00:00:00.000Z	74 \| moderate	14.248 \| fine	63.038 \| fine	62.086 \| fine	0.725 \| good	7.299 \| good	0.197 \| good
2026-08-09T01:00:00.000Z	71 \| moderate	13.724 \| fine	60.26 \| fine	61.238 \| fine	0.644 \| good	8.933 \| good	0.2 \| good
2026-08-09T02:00:00.000Z	61 \| moderate	13.505 \| fine	58.541 \| fine	57.847 \| fine	0.746 \| good	16.522 \| good	0.406 \| good
2026-08-09T03:00:00.000Z	82 \| moderate	25.961 \| fine	113.18 \| fine	45.13 \| good	0.366 \| good	5.736 \| good	0.166 \| good
2026-08-09T04:00:00.000Z	56 \| moderate	12.489 \| fine	53.981 \| good	55.589 \| fine	0.778 \| good	20.575 \| good	0.58 \| good
2026-08-09T05:00:00.000Z	56 \| moderate	12.392 \| fine	56.233 \| fine	52.207 \| good	0.758 \| good	20.012 \| good	0.401 \| good
2026-08-09T06:00:00.000Z	58 \| moderate	12.656 \| fine	56.483 \| fine	51.734 \| good	0.969 \| good	21.458 \| good	0.464 \| good
2026-08-09T07:00:00.000Z	58 \| moderate	12.771 \| fine	57.691 \| fine	50.768 \| good	0.939 \| good	17.851 \| good	0.374 \| good
2026-08-09T08:00:00.000Z	58 \| moderate	12.758 \| fine	57.327 \| fine	50.423 \| good	0.658 \| good	13.235 \| good	0.348 \| good
2026-08-09T09:00:00.000Z	58 \| moderate	12.911 \| fine	56.752 \| fine	49.097 \| good	0.832 \| good	12.797 \| good	0.261 \| good
2026-08-09T10:00:00.000Z	58 \| moderate	12.771 \| fine	57.892 \| fine	47.862 \| good	0.934 \| good	14.738 \| good	0.261 \| good
2026-08-09T11:00:00.000Z	58 \| moderate	12.916 \| fine	56.851 \| fine	45.249 \| good	0.941 \| good	13.181 \| good	0.351 \| good
2026-08-09T12:00:00.000Z	58 \| moderate	12.678 \| fine	56.384 \| fine	44.794 \| good	0.761 \| good	12.663 \| good	0.287 \| good
2026-08-09T13:00:00.000Z	58 \| moderate	12.737 \| fine	56.764 \| fine	44.893 \| good	1.041 \| good	10.893 \| good	0.226 \| good
2026-08-09T14:00:00.000Z	60 \| moderate	14.096 \| fine	62.416 \| fine	43.691 \| good	1.138 \| good	10.964 \| good	0.287 \| good
2026-08-09T15:00:00.000Z	60 \| moderate	13.588 \| fine	60.62 \| fine	46.098 \| good	1.336 \| good	9.546 \| good	0.226 \| good
2026-08-09T16:00:00.000Z	58 \| moderate	12.864 \| fine	55.659 \| fine	46.392 \| good	1.145 \| good	12.217 \| good	0.287 \| good
2026-08-09T17:00:00.000Z	58 \| moderate	13.012 \| fine	57.888 \| fine	52.192 \| good	0.987 \| good	9.434 \| good	0.2 \| good
2026-08-09T18:00:00.000Z	64 \| moderate	13.217 \| fine	59.639 \| fine	58.631 \| fine	1.263 \| good	6.523 \| good	0.195 \| good
2026-08-09T19:00:00.000Z	71 \| moderate	13.156 \| fine	58.084 \| fine	60.863 \| fine	1.208 \| good	8.871 \| good	0.256 \| good
2026-08-09T20:00:00.000Z	77 \| moderate	14.127 \| fine	63.973 \| fine	62.787 \| fine	0.81 \| good	9.307 \| good	0.322 \| good
2026-08-09T21:00:00.000Z	87 \| moderate	14.428 \| fine	61.583 \| fine	65.747 \| fine	0.787 \| good	6.114 \| good	0.261 \| good
2026-08-09T22:00:00.000Z	80 \| moderate	14.982 \| fine	67.071 \| fine	63.636 \| fine	0.719 \| good	10.484 \| good	0.383 \| good
2026-08-09T23:00:00.000Z	74 \| moderate	14.563 \| fine	65.525 \| fine	61.868 \| fine	0.685 \| good	10.941 \| good	0.375 \| good
2026-08-10T00:00:00.000Z	61 \| moderate	14.286 \| fine	63.564 \| fine	57.849 \| fine	0.686 \| good	12.669 \| good	0.401 \| good
2026-08-10T01:00:00.000Z	60 \| moderate	14.028 \| fine	62.956 \| fine	55.792 \| fine	0.67 \| good	15.775 \| good	0.432 \| good
2026-08-10T02:00:00.000Z	62 \| moderate	14.633 \| fine	65.764 \| fine	55.436 \| fine	0.987 \| good	14.067 \| good	0.406 \| good
2026-08-10T03:00:00.000Z	75 \| moderate	21.991 \| fine	95.614 \| fine	52.376 \| good	0.354 \| good	7.337 \| good	0.204 \| good
2026-08-10T04:00:00.000Z	64 \| moderate	15.637 \| fine	69.459 \| fine	48.6 \| good	0.644 \| good	23.188 \| good	0.554 \| good
2026-08-10T05:00:00.000Z	66 \| moderate	16.995 \| fine	73.726 \| fine	46.307 \| good	0.967 \| good	25.591 \| good	0.554 \| good
2026-08-10T06:00:00.000Z	66 \| moderate	17.137 \| fine	76.944 \| fine	43.007 \| good	0.931 \| good	24.892 \| good	0.58 \| good
2026-08-10T07:00:00.000Z	66 \| moderate	16.507 \| fine	74.651 \| fine	42.624 \| good	0.774 \| good	24.611 \| good	0.519 \| good
2026-08-10T08:00:00.000Z	66 \| moderate	16.765 \| fine	73.378 \| fine	36.54 \| good	1.111 \| good	25.803 \| good	0.458 \| good
2026-08-10T09:00:00.000Z	66 \| moderate	16.836 \| fine	76.079 \| fine	35.984 \| good	1.068 \| good	23.578 \| good	0.458 \| good
2026-08-10T10:00:00.000Z	66 \| moderate	16.801 \| fine	75.408 \| fine	35.561 \| good	0.877 \| good	21.021 \| good	0.348 \| good
2026-08-10T11:00:00.000Z	66 \| moderate	16.548 \| fine	72.545 \| fine	34.293 \| good	0.876 \| good	20.294 \| good	0.348 \| good
2026-08-10T12:00:00.000Z	66 \| moderate	16.736 \| fine	73.519 \| fine	36.621 \| good	0.844 \| good	20.497 \| good	0.409 \| good
2026-08-10T13:00:00.000Z	64 \| moderate	16.247 \| fine	73.649 \| fine	34.272 \| good	1.083 \| good	27.825 \| good	0.47 \| good
2026-08-10T14:00:00.000Z	66 \| moderate	17.022 \| fine	73.298 \| fine	36.488 \| good	1.312 \| good	27.184 \| good	0.501 \| good
2026-08-10T15:00:00.000Z	66 \| moderate	17.355 \| fine	75.426 \| fine	40.182 \| good	1.434 \| good	22.881 \| good	0.467 \| good
2026-08-10T16:00:00.000Z	66 \| moderate	17.337 \| fine	76.118 \| fine	44.553 \| good	1.61 \| good	25.005 \| good	0.38 \| good
2026-08-10T17:00:00.000Z	67 \| moderate	17.539 \| fine	78.249 \| fine	47.982 \| good	1.921 \| good	27.25 \| good	0.353 \| good
2026-08-10T18:00:00.000Z	67 \| moderate	17.782 \| fine	79 \| fine	50.148 \| good	1.48 \| good	30.432 \| good	0.432 \| good
2026-08-10T19:00:00.000Z	66 \| moderate	17.469 \| fine	77.76 \| fine	57.066 \| fine	0.786 \| good	19.369 \| good	0.38 \| good
2026-08-10T20:00:00.000Z	97 \| moderate	21.83 \| fine	95.144 \| fine	69.393 \| fine	0.275 \| good	0.545 \| good	0.167 \| good
2026-08-10T20:00:00.000Z	71 \| moderate	15.863 \| fine	71.399 \| fine	61.299 \| fine	0.704 \| good	18.271 \| good	0.329 \| good
2026-08-10T18:00:00.000Z	97 \| moderate	23.139 \| fine	101.271 \| fine	69.491 \| fine	0.311 \| good	0.641 \| good	0.168 \| good
2026-08-10T19:00:00.000Z	100 \| moderate	22.931 \| fine	100.829 \| fine	69.547 \| fine	0.287 \| good	0.504 \| good	0.168 \| good
2026-08-10T20:00:00.000Z	101 \| sensitive	21.805 \| fine	95.189 \| fine	71.237 \| moderate	0.272 \| good	0.52 \| good	0.167 \| good
2026-08-10T21:00:00.000Z	97 \| moderate	18.935 \| fine	83.671 \| fine	69.256 \| fine	0.265 \| good	0.607 \| good	0.165 \| good
2026-08-10T22:00:00.000Z	101 \| sensitive	17.028 \| fine	75.528 \| fine	70.798 \| fine	0.26 \| good	1.305 \| good	0.17 \| good
2026-08-10T23:00:00.000Z	87 \| moderate	16.755 \| fine	74.797 \| fine	65.518 \| fine	0.264 \| good	1.943 \| good	0.175 \| good
2026-08-11T00:00:00.000Z	87 \| moderate	20.958 \| fine	92.673 \| fine	65.648 \| fine	0.286 \| good	2.288 \| good	0.178 \| good
2026-08-11T01:00:00.000Z	84 \| moderate	21.441 \| fine	93.576 \| fine	65.382 \| fine	0.296 \| good	3.234 \| good	0.187 \| good
2026-08-11T02:00:00.000Z	74 \| moderate	20.107 \| fine	88.158 \| fine	61.981 \| fine	0.283 \| good	5.442 \| good	0.202 \| good
2026-08-11T03:00:00.000Z	71 \| moderate	19.929 \| fine	87.88 \| fine	56.132 \| fine	0.288 \| good	6.531 \| good	0.209 \| good
2026-08-11T04:00:00.000Z	73 \| moderate	21.171 \| fine	92.711 \| fine	53.229 \| good	0.281 \| good	7.109 \| good	0.212 \| good
2026-08-11T05:00:00.000Z	71 \| moderate	19.946 \| fine	88.081 \| fine	49.45 \| good	0.27 \| good	7.733 \| good	0.215 \| good
2026-08-11T06:00:00.000Z	69 \| moderate	18.906 \| fine	82.76 \| fine	50.291 \| good	0.261 \| good	7.95 \| good	0.216 \| good
2026-08-11T07:00:00.000Z	67 \| moderate	18.05 \| fine	80.202 \| fine	46.416 \| good	0.245 \| good	7.751 \| good	0.216 \| good
2026-08-11T08:00:00.000Z	66 \| moderate	16.904 \| fine	74.548 \| fine	45.879 \| good	0.229 \| good	7.531 \| good	0.213 \| good
2026-08-11T09:00:00.000Z	66 \| moderate	17.082 \| fine	75.846 \| fine	43.073 \| good	0.215 \| good	7.221 \| good	0.209 \| good
2026-08-11T10:00:00.000Z	67 \| moderate	17.616 \| fine	78.133 \| fine	46.265 \| good	0.203 \| good	6.887 \| good	0.204 \| good
2026-08-11T11:00:00.000Z	66 \| moderate	16.504 \| fine	73.127 \| fine	45.692 \| good	0.192 \| good	6.569 \| good	0.199 \| good
2026-08-11T12:00:00.000Z	67 \| moderate	18.486 \| fine	81.897 \| fine	41.451 \| good	0.184 \| good	6.39 \| good	0.194 \| good
2026-08-11T13:00:00.000Z	69 \| moderate	19.059 \| fine	84.072 \| fine	44.245 \| good	0.168 \| good	5.785 \| good	0.192 \| good
2026-08-11T14:00:00.000Z	69 \| moderate	18.586 \| fine	82.104 \| fine	46.532 \| good	0.182 \| good	5.124 \| good	0.195 \| good
2026-08-11T15:00:00.000Z	71 \| moderate	20.177 \| fine	89.225 \| fine	53.389 \| good	0.215 \| good	3.712 \| good	0.18 \| good
2026-08-11T16:00:00.000Z	73 \| moderate	20.973 \| fine	92.012 \| fine	61.008 \| fine	0.284 \| good	1.762 \| good	0.153 \| good
2026-08-11T17:00:00.000Z	90 \| moderate	19.953 \| fine	87.36 \| fine	66.528 \| fine	0.253 \| good	0.849 \| good	0.136 \| good
2026-08-11T18:00:00.000Z	108 \| sensitive	19.917 \| fine	87.412 \| fine	72.788 \| moderate	0.222 \| good	0.574 \| good	0.129 \| good
2026-08-11T19:00:00.000Z	126 \| sensitive	20.25 \| fine	88.973 \| fine	77.872 \| moderate	0.21 \| good	0.498 \| good	0.127 \| good
2026-08-11T20:00:00.000Z	133 \| sensitive	21.093 \| fine	92.885 \| fine	79.694 \| moderate	0.202 \| good	0.49 \| good	0.125 \| good
2026-08-11T21:00:00.000Z	140 \| sensitive	20.733 \| fine	91.387 \| fine	81.794 \| moderate	0.197 \| good	0.561 \| good	0.123 \| good
2026-08-11T22:00:00.000Z	122 \| sensitive	19.108 \| fine	84.644 \| fine	76.506 \| moderate	0.197 \| good	0.728 \| good	0.124 \| good
2026-08-11T23:00:00.000Z	101 \| sensitive	17.95 \| fine	79.325 \| fine	70.761 \| fine	0.202 \| good	1.077 \| good	0.126 \| good
2026-08-12T00:00:00.000Z	90 \| moderate	18.094 \| fine	79.623 \| fine	67.104 \| fine	0.22 \| good	1.838 \| good	0.133 \| good
2026-08-12T01:00:00.000Z	97 \| moderate	18.697 \| fine	82.038 \| fine	68.986 \| fine	0.239 \| good	2.815 \| good	0.141 \| good
2026-08-12T02:00:00.000Z	71 \| moderate	19.907 \| fine	87.965 \| fine	58.873 \| fine	0.249 \| good	4.553 \| good	0.154 \| good
2026-08-12T03:00:00.000Z	69 \| moderate	18.759 \| fine	83.362 \| fine	59.712 \| fine	0.263 \| good	5.892 \| good	0.163 \| good
2026-08-12T04:00:00.000Z	60 \| moderate	13.849 \| fine	61.671 \| fine	55.657 \| fine	0.265 \| good	6.611 \| good	0.168 \| good
2026-08-12T05:00:00.000Z	71 \| moderate	12.545 \| fine	56.969 \| fine	61.246 \| fine	0.254 \| good	7.239 \| good	0.173 \| good
2026-08-12T06:00:00.000Z	71 \| moderate	12.707 \| fine	57.361 \| fine	60.725 \| fine	0.232 \| good	7.108 \| good	0.173 \| good
2026-08-12T07:00:00.000Z	61 \| moderate	13 \| fine	58.969 \| fine	57.792 \| fine	0.206 \| good	5.971 \| good	0.167 \| good
2026-08-12T08:00:00.000Z	60 \| moderate	14.077 \| fine	63.087 \| fine	53.207 \| good	0.182 \| good	5.356 \| good	0.162 \| good
2026-08-12T09:00:00.000Z	60 \| moderate	14.478 \| fine	64.942 \| fine	51.286 \| good	0.163 \| good	5.224 \| good	0.16 \| good
2026-08-12T10:00:00.000Z	60 \| moderate	14.434 \| fine	65.112 \| fine	50.069 \| good	0.152 \| good	5.257 \| good	0.159 \| good
2026-08-12T11:00:00.000Z	54 \| moderate	11.044 \| good	48.85 \| good	40.717 \| good	0.145 \| good	5.413 \| good	0.158 \| good
2026-08-12T12:00:00.000Z	56 \| moderate	12.109 \| fine	54.578 \| good	43.082 \| good	0.143 \| good	5.552 \| good	0.157 \| good
2026-08-12T13:00:00.000Z	60 \| moderate	13.534 \| fine	61.226 \| fine	39.6 \| good	0.129 \| good	5.151 \| good	0.158 \| good
2026-08-12T14:00:00.000Z	60 \| moderate	14.062 \| fine	63.204 \| fine	37.928 \| good	0.135 \| good	4.684 \| good	0.163 \| good
2026-08-12T15:00:00.000Z	64 \| moderate	15.683 \| fine	69.617 \| fine	37.308 \| good	0.147 \| good	3.338 \| good	0.152 \| good
2026-08-12T16:00:00.000Z	69 \| moderate	18.524 \| fine	81.807 \| fine	45.628 \| good	0.187 \| good	1.602 \| good	0.137 \| good
2026-08-12T17:00:00.000Z	69 \| moderate	18.96 \| fine	83.518 \| fine	54.331 \| good	0.183 \| good	0.782 \| good	0.131 \| good

Highlands Ranch

Get reliable air quality data to drive your business

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

0.37ppm

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 10:00:00 on 2026-08-09.

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 2026-08-10.

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

As of now, the AQI in Highlands Ranch, Colorado is 64, indicating Moderate conditions.

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

Highlands Ranch, Colorado air has the highest levels of PM2.5.

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 16.257 μg/m³.

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

The PM₁₀ concentration in Highlands Ranch, Colorado is 67.259 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 0.367 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 1.266 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 50.173 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 26.269 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-08T21:00:00.000Z	90 \| moderate	17.213 \| fine	76.369 \| fine	67.16 \| fine	0.726 \| good	11.812 \| good	0.327 \| good
2026-08-08T22:00:00.000Z	84 \| moderate	16.095 \| fine	71.795 \| fine	65.366 \| fine	0.76 \| good	11.221 \| good	0.322 \| good
2026-08-08T23:00:00.000Z	84 \| moderate	14.933 \| fine	66.717 \| fine	65.408 \| fine	0.719 \| good	5.643 \| good	0.197 \| good
2026-08-09T00:00:00.000Z	74 \| moderate	14.248 \| fine	63.038 \| fine	62.086 \| fine	0.725 \| good	7.299 \| good	0.197 \| good
2026-08-09T01:00:00.000Z	71 \| moderate	13.724 \| fine	60.26 \| fine	61.238 \| fine	0.644 \| good	8.933 \| good	0.2 \| good
2026-08-09T02:00:00.000Z	61 \| moderate	13.505 \| fine	58.541 \| fine	57.847 \| fine	0.746 \| good	16.522 \| good	0.406 \| good
2026-08-09T03:00:00.000Z	82 \| moderate	25.961 \| fine	113.18 \| fine	45.13 \| good	0.366 \| good	5.736 \| good	0.166 \| good
2026-08-09T04:00:00.000Z	56 \| moderate	12.489 \| fine	53.981 \| good	55.589 \| fine	0.778 \| good	20.575 \| good	0.58 \| good
2026-08-09T05:00:00.000Z	56 \| moderate	12.392 \| fine	56.233 \| fine	52.207 \| good	0.758 \| good	20.012 \| good	0.401 \| good
2026-08-09T06:00:00.000Z	58 \| moderate	12.656 \| fine	56.483 \| fine	51.734 \| good	0.969 \| good	21.458 \| good	0.464 \| good
2026-08-09T07:00:00.000Z	58 \| moderate	12.771 \| fine	57.691 \| fine	50.768 \| good	0.939 \| good	17.851 \| good	0.374 \| good
2026-08-09T08:00:00.000Z	58 \| moderate	12.758 \| fine	57.327 \| fine	50.423 \| good	0.658 \| good	13.235 \| good	0.348 \| good
2026-08-09T09:00:00.000Z	58 \| moderate	12.911 \| fine	56.752 \| fine	49.097 \| good	0.832 \| good	12.797 \| good	0.261 \| good
2026-08-09T10:00:00.000Z	58 \| moderate	12.771 \| fine	57.892 \| fine	47.862 \| good	0.934 \| good	14.738 \| good	0.261 \| good
2026-08-09T11:00:00.000Z	58 \| moderate	12.916 \| fine	56.851 \| fine	45.249 \| good	0.941 \| good	13.181 \| good	0.351 \| good
2026-08-09T12:00:00.000Z	58 \| moderate	12.678 \| fine	56.384 \| fine	44.794 \| good	0.761 \| good	12.663 \| good	0.287 \| good
2026-08-09T13:00:00.000Z	58 \| moderate	12.737 \| fine	56.764 \| fine	44.893 \| good	1.041 \| good	10.893 \| good	0.226 \| good
2026-08-09T14:00:00.000Z	60 \| moderate	14.096 \| fine	62.416 \| fine	43.691 \| good	1.138 \| good	10.964 \| good	0.287 \| good
2026-08-09T15:00:00.000Z	60 \| moderate	13.588 \| fine	60.62 \| fine	46.098 \| good	1.336 \| good	9.546 \| good	0.226 \| good
2026-08-09T16:00:00.000Z	58 \| moderate	12.864 \| fine	55.659 \| fine	46.392 \| good	1.145 \| good	12.217 \| good	0.287 \| good
2026-08-09T17:00:00.000Z	58 \| moderate	13.012 \| fine	57.888 \| fine	52.192 \| good	0.987 \| good	9.434 \| good	0.2 \| good
2026-08-09T18:00:00.000Z	64 \| moderate	13.217 \| fine	59.639 \| fine	58.631 \| fine	1.263 \| good	6.523 \| good	0.195 \| good
2026-08-09T19:00:00.000Z	71 \| moderate	13.156 \| fine	58.084 \| fine	60.863 \| fine	1.208 \| good	8.871 \| good	0.256 \| good
2026-08-09T20:00:00.000Z	77 \| moderate	14.127 \| fine	63.973 \| fine	62.787 \| fine	0.81 \| good	9.307 \| good	0.322 \| good
2026-08-09T21:00:00.000Z	87 \| moderate	14.428 \| fine	61.583 \| fine	65.747 \| fine	0.787 \| good	6.114 \| good	0.261 \| good
2026-08-09T22:00:00.000Z	80 \| moderate	14.982 \| fine	67.071 \| fine	63.636 \| fine	0.719 \| good	10.484 \| good	0.383 \| good
2026-08-09T23:00:00.000Z	74 \| moderate	14.563 \| fine	65.525 \| fine	61.868 \| fine	0.685 \| good	10.941 \| good	0.375 \| good
2026-08-10T00:00:00.000Z	61 \| moderate	14.286 \| fine	63.564 \| fine	57.849 \| fine	0.686 \| good	12.669 \| good	0.401 \| good
2026-08-10T01:00:00.000Z	60 \| moderate	14.028 \| fine	62.956 \| fine	55.792 \| fine	0.67 \| good	15.775 \| good	0.432 \| good
2026-08-10T02:00:00.000Z	62 \| moderate	14.633 \| fine	65.764 \| fine	55.436 \| fine	0.987 \| good	14.067 \| good	0.406 \| good
2026-08-10T03:00:00.000Z	75 \| moderate	21.991 \| fine	95.614 \| fine	52.376 \| good	0.354 \| good	7.337 \| good	0.204 \| good
2026-08-10T04:00:00.000Z	64 \| moderate	15.637 \| fine	69.459 \| fine	48.6 \| good	0.644 \| good	23.188 \| good	0.554 \| good
2026-08-10T05:00:00.000Z	66 \| moderate	16.995 \| fine	73.726 \| fine	46.307 \| good	0.967 \| good	25.591 \| good	0.554 \| good
2026-08-10T06:00:00.000Z	66 \| moderate	17.137 \| fine	76.944 \| fine	43.007 \| good	0.931 \| good	24.892 \| good	0.58 \| good
2026-08-10T07:00:00.000Z	66 \| moderate	16.507 \| fine	74.651 \| fine	42.624 \| good	0.774 \| good	24.611 \| good	0.519 \| good
2026-08-10T08:00:00.000Z	66 \| moderate	16.765 \| fine	73.378 \| fine	36.54 \| good	1.111 \| good	25.803 \| good	0.458 \| good
2026-08-10T09:00:00.000Z	66 \| moderate	16.836 \| fine	76.079 \| fine	35.984 \| good	1.068 \| good	23.578 \| good	0.458 \| good
2026-08-10T10:00:00.000Z	66 \| moderate	16.801 \| fine	75.408 \| fine	35.561 \| good	0.877 \| good	21.021 \| good	0.348 \| good
2026-08-10T11:00:00.000Z	66 \| moderate	16.548 \| fine	72.545 \| fine	34.293 \| good	0.876 \| good	20.294 \| good	0.348 \| good
2026-08-10T12:00:00.000Z	66 \| moderate	16.736 \| fine	73.519 \| fine	36.621 \| good	0.844 \| good	20.497 \| good	0.409 \| good
2026-08-10T13:00:00.000Z	64 \| moderate	16.247 \| fine	73.649 \| fine	34.272 \| good	1.083 \| good	27.825 \| good	0.47 \| good
2026-08-10T14:00:00.000Z	66 \| moderate	17.022 \| fine	73.298 \| fine	36.488 \| good	1.312 \| good	27.184 \| good	0.501 \| good
2026-08-10T15:00:00.000Z	66 \| moderate	17.355 \| fine	75.426 \| fine	40.182 \| good	1.434 \| good	22.881 \| good	0.467 \| good
2026-08-10T16:00:00.000Z	66 \| moderate	17.337 \| fine	76.118 \| fine	44.553 \| good	1.61 \| good	25.005 \| good	0.38 \| good
2026-08-10T17:00:00.000Z	67 \| moderate	17.539 \| fine	78.249 \| fine	47.982 \| good	1.921 \| good	27.25 \| good	0.353 \| good
2026-08-10T18:00:00.000Z	67 \| moderate	17.782 \| fine	79 \| fine	50.148 \| good	1.48 \| good	30.432 \| good	0.432 \| good
2026-08-10T19:00:00.000Z	66 \| moderate	17.469 \| fine	77.76 \| fine	57.066 \| fine	0.786 \| good	19.369 \| good	0.38 \| good
2026-08-10T20:00:00.000Z	97 \| moderate	21.83 \| fine	95.144 \| fine	69.393 \| fine	0.275 \| good	0.545 \| good	0.167 \| good
2026-08-10T20:00:00.000Z	71 \| moderate	15.863 \| fine	71.399 \| fine	61.299 \| fine	0.704 \| good	18.271 \| good	0.329 \| good
2026-08-10T18:00:00.000Z	97 \| moderate	23.139 \| fine	101.271 \| fine	69.491 \| fine	0.311 \| good	0.641 \| good	0.168 \| good
2026-08-10T19:00:00.000Z	100 \| moderate	22.931 \| fine	100.829 \| fine	69.547 \| fine	0.287 \| good	0.504 \| good	0.168 \| good
2026-08-10T20:00:00.000Z	101 \| sensitive	21.805 \| fine	95.189 \| fine	71.237 \| moderate	0.272 \| good	0.52 \| good	0.167 \| good
2026-08-10T21:00:00.000Z	97 \| moderate	18.935 \| fine	83.671 \| fine	69.256 \| fine	0.265 \| good	0.607 \| good	0.165 \| good
2026-08-10T22:00:00.000Z	101 \| sensitive	17.028 \| fine	75.528 \| fine	70.798 \| fine	0.26 \| good	1.305 \| good	0.17 \| good
2026-08-10T23:00:00.000Z	87 \| moderate	16.755 \| fine	74.797 \| fine	65.518 \| fine	0.264 \| good	1.943 \| good	0.175 \| good
2026-08-11T00:00:00.000Z	87 \| moderate	20.958 \| fine	92.673 \| fine	65.648 \| fine	0.286 \| good	2.288 \| good	0.178 \| good
2026-08-11T01:00:00.000Z	84 \| moderate	21.441 \| fine	93.576 \| fine	65.382 \| fine	0.296 \| good	3.234 \| good	0.187 \| good
2026-08-11T02:00:00.000Z	74 \| moderate	20.107 \| fine	88.158 \| fine	61.981 \| fine	0.283 \| good	5.442 \| good	0.202 \| good
2026-08-11T03:00:00.000Z	71 \| moderate	19.929 \| fine	87.88 \| fine	56.132 \| fine	0.288 \| good	6.531 \| good	0.209 \| good
2026-08-11T04:00:00.000Z	73 \| moderate	21.171 \| fine	92.711 \| fine	53.229 \| good	0.281 \| good	7.109 \| good	0.212 \| good
2026-08-11T05:00:00.000Z	71 \| moderate	19.946 \| fine	88.081 \| fine	49.45 \| good	0.27 \| good	7.733 \| good	0.215 \| good
2026-08-11T06:00:00.000Z	69 \| moderate	18.906 \| fine	82.76 \| fine	50.291 \| good	0.261 \| good	7.95 \| good	0.216 \| good
2026-08-11T07:00:00.000Z	67 \| moderate	18.05 \| fine	80.202 \| fine	46.416 \| good	0.245 \| good	7.751 \| good	0.216 \| good
2026-08-11T08:00:00.000Z	66 \| moderate	16.904 \| fine	74.548 \| fine	45.879 \| good	0.229 \| good	7.531 \| good	0.213 \| good
2026-08-11T09:00:00.000Z	66 \| moderate	17.082 \| fine	75.846 \| fine	43.073 \| good	0.215 \| good	7.221 \| good	0.209 \| good
2026-08-11T10:00:00.000Z	67 \| moderate	17.616 \| fine	78.133 \| fine	46.265 \| good	0.203 \| good	6.887 \| good	0.204 \| good
2026-08-11T11:00:00.000Z	66 \| moderate	16.504 \| fine	73.127 \| fine	45.692 \| good	0.192 \| good	6.569 \| good	0.199 \| good
2026-08-11T12:00:00.000Z	67 \| moderate	18.486 \| fine	81.897 \| fine	41.451 \| good	0.184 \| good	6.39 \| good	0.194 \| good
2026-08-11T13:00:00.000Z	69 \| moderate	19.059 \| fine	84.072 \| fine	44.245 \| good	0.168 \| good	5.785 \| good	0.192 \| good
2026-08-11T14:00:00.000Z	69 \| moderate	18.586 \| fine	82.104 \| fine	46.532 \| good	0.182 \| good	5.124 \| good	0.195 \| good
2026-08-11T15:00:00.000Z	71 \| moderate	20.177 \| fine	89.225 \| fine	53.389 \| good	0.215 \| good	3.712 \| good	0.18 \| good
2026-08-11T16:00:00.000Z	73 \| moderate	20.973 \| fine	92.012 \| fine	61.008 \| fine	0.284 \| good	1.762 \| good	0.153 \| good
2026-08-11T17:00:00.000Z	90 \| moderate	19.953 \| fine	87.36 \| fine	66.528 \| fine	0.253 \| good	0.849 \| good	0.136 \| good
2026-08-11T18:00:00.000Z	108 \| sensitive	19.917 \| fine	87.412 \| fine	72.788 \| moderate	0.222 \| good	0.574 \| good	0.129 \| good
2026-08-11T19:00:00.000Z	126 \| sensitive	20.25 \| fine	88.973 \| fine	77.872 \| moderate	0.21 \| good	0.498 \| good	0.127 \| good
2026-08-11T20:00:00.000Z	133 \| sensitive	21.093 \| fine	92.885 \| fine	79.694 \| moderate	0.202 \| good	0.49 \| good	0.125 \| good
2026-08-11T21:00:00.000Z	140 \| sensitive	20.733 \| fine	91.387 \| fine	81.794 \| moderate	0.197 \| good	0.561 \| good	0.123 \| good
2026-08-11T22:00:00.000Z	122 \| sensitive	19.108 \| fine	84.644 \| fine	76.506 \| moderate	0.197 \| good	0.728 \| good	0.124 \| good
2026-08-11T23:00:00.000Z	101 \| sensitive	17.95 \| fine	79.325 \| fine	70.761 \| fine	0.202 \| good	1.077 \| good	0.126 \| good
2026-08-12T00:00:00.000Z	90 \| moderate	18.094 \| fine	79.623 \| fine	67.104 \| fine	0.22 \| good	1.838 \| good	0.133 \| good
2026-08-12T01:00:00.000Z	97 \| moderate	18.697 \| fine	82.038 \| fine	68.986 \| fine	0.239 \| good	2.815 \| good	0.141 \| good
2026-08-12T02:00:00.000Z	71 \| moderate	19.907 \| fine	87.965 \| fine	58.873 \| fine	0.249 \| good	4.553 \| good	0.154 \| good
2026-08-12T03:00:00.000Z	69 \| moderate	18.759 \| fine	83.362 \| fine	59.712 \| fine	0.263 \| good	5.892 \| good	0.163 \| good
2026-08-12T04:00:00.000Z	60 \| moderate	13.849 \| fine	61.671 \| fine	55.657 \| fine	0.265 \| good	6.611 \| good	0.168 \| good
2026-08-12T05:00:00.000Z	71 \| moderate	12.545 \| fine	56.969 \| fine	61.246 \| fine	0.254 \| good	7.239 \| good	0.173 \| good
2026-08-12T06:00:00.000Z	71 \| moderate	12.707 \| fine	57.361 \| fine	60.725 \| fine	0.232 \| good	7.108 \| good	0.173 \| good
2026-08-12T07:00:00.000Z	61 \| moderate	13 \| fine	58.969 \| fine	57.792 \| fine	0.206 \| good	5.971 \| good	0.167 \| good
2026-08-12T08:00:00.000Z	60 \| moderate	14.077 \| fine	63.087 \| fine	53.207 \| good	0.182 \| good	5.356 \| good	0.162 \| good
2026-08-12T09:00:00.000Z	60 \| moderate	14.478 \| fine	64.942 \| fine	51.286 \| good	0.163 \| good	5.224 \| good	0.16 \| good
2026-08-12T10:00:00.000Z	60 \| moderate	14.434 \| fine	65.112 \| fine	50.069 \| good	0.152 \| good	5.257 \| good	0.159 \| good
2026-08-12T11:00:00.000Z	54 \| moderate	11.044 \| good	48.85 \| good	40.717 \| good	0.145 \| good	5.413 \| good	0.158 \| good
2026-08-12T12:00:00.000Z	56 \| moderate	12.109 \| fine	54.578 \| good	43.082 \| good	0.143 \| good	5.552 \| good	0.157 \| good
2026-08-12T13:00:00.000Z	60 \| moderate	13.534 \| fine	61.226 \| fine	39.6 \| good	0.129 \| good	5.151 \| good	0.158 \| good
2026-08-12T14:00:00.000Z	60 \| moderate	14.062 \| fine	63.204 \| fine	37.928 \| good	0.135 \| good	4.684 \| good	0.163 \| good
2026-08-12T15:00:00.000Z	64 \| moderate	15.683 \| fine	69.617 \| fine	37.308 \| good	0.147 \| good	3.338 \| good	0.152 \| good
2026-08-12T16:00:00.000Z	69 \| moderate	18.524 \| fine	81.807 \| fine	45.628 \| good	0.187 \| good	1.602 \| good	0.137 \| good
2026-08-12T17:00:00.000Z	69 \| moderate	18.96 \| fine	83.518 \| fine	54.331 \| good	0.183 \| good	0.782 \| good	0.131 \| 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)

Track live Highlands Ranch, Colorado air quality forecast and history

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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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Air quality levels in US

Frequently asked questions

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

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

What is the carbon monoxide (CO) 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?

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?