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 0.393 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 45.252 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 5.77 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 1.085 μg/m3.

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

The PM10 concentration in Highlands Ranch, Colorado is 4.398 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)

Good

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)

1.13 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

5.87 μg/m³

155

255

425

605+

Ozone (O₃)

44.25 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.25 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

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
2026-04-22T06:00:00.000Z	47 \| good	4.723 \| good	23.259 \| good	51.187 \| good	0.646 \| good	13.817 \| good	0.258 \| good
2026-04-22T07:00:00.000Z	46 \| good	4.317 \| good	19.729 \| good	49.597 \| good	0.674 \| good	11.583 \| good	0.298 \| good
2026-04-22T08:00:00.000Z	44 \| good	4.317 \| good	17.5 \| good	48.299 \| good	0.64 \| good	10.603 \| good	0.189 \| good
2026-04-22T09:00:00.000Z	44 \| good	4.111 \| good	16.131 \| good	47.923 \| good	0.641 \| good	9.011 \| good	0.158 \| good
2026-04-22T10:00:00.000Z	43 \| good	3.775 \| good	16.279 \| good	46.342 \| good	0.736 \| good	10.094 \| good	0.166 \| good
2026-04-22T11:00:00.000Z	42 \| good	3.659 \| good	14.647 \| good	44.959 \| good	0.84 \| good	18.291 \| good	0.218 \| good
2026-04-22T12:00:00.000Z	42 \| good	3.8 \| good	12.394 \| good	45.25 \| good	0.883 \| good	25.909 \| good	0.359 \| good
2026-04-22T13:00:00.000Z	39 \| good	3.671 \| good	13.011 \| good	41.634 \| good	0.825 \| good	30.537 \| good	0.39 \| good
2026-04-22T14:00:00.000Z	38 \| good	3.746 \| good	15.885 \| good	41.153 \| good	0.873 \| good	25.364 \| good	0.262 \| good
2026-04-22T15:00:00.000Z	40 \| good	3.935 \| good	16.682 \| good	43.423 \| good	0.875 \| good	23.496 \| good	0.321 \| good
2026-04-22T16:00:00.000Z	44 \| good	3.79 \| good	15.719 \| good	47.165 \| good	0.599 \| good	18.841 \| good	0.314 \| good
2026-04-22T17:00:00.000Z	45 \| good	4.003 \| good	18.513 \| good	49.395 \| good	0.534 \| good	14.357 \| good	0.254 \| good
2026-04-22T18:00:00.000Z	47 \| good	4.073 \| good	24.66 \| good	51.453 \| good	0.433 \| good	11.761 \| good	0.248 \| good
2026-04-22T19:00:00.000Z	49 \| good	2.926 \| good	26.627 \| good	52.783 \| good	0.455 \| good	9.323 \| good	0.182 \| good
2026-04-22T20:00:00.000Z	49 \| good	2.981 \| good	21.114 \| good	52.51 \| good	0.385 \| good	10.097 \| good	0.241 \| good
2026-04-22T21:00:00.000Z	51 \| moderate	3.113 \| good	24.933 \| good	54.849 \| good	0.363 \| good	10.835 \| good	0.27 \| good
2026-04-22T22:00:00.000Z	50 \| good	2.222 \| good	14.955 \| good	54.301 \| good	0.432 \| good	9.686 \| good	0.27 \| good
2026-04-22T23:00:00.000Z	49 \| good	2.463 \| good	19.766 \| good	53.415 \| good	0.32 \| good	8.013 \| good	0.21 \| good
2026-04-23T00:00:00.000Z	59 \| moderate	4.598 \| good	72.238 \| fine	54.113 \| good	0.338 \| good	6.871 \| good	0.21 \| good
2026-04-23T01:00:00.000Z	54 \| moderate	3.535 \| good	60.112 \| fine	55.559 \| fine	0.226 \| good	7.627 \| good	0.204 \| good
2026-04-23T02:00:00.000Z	50 \| good	2.561 \| good	13.259 \| good	54.302 \| good	0.317 \| good	8.075 \| good	0.204 \| good
2026-04-23T03:00:00.000Z	49 \| good	2.47 \| good	13.511 \| good	52.85 \| good	0.424 \| good	8.917 \| good	0.21 \| good
2026-04-23T04:00:00.000Z	46 \| good	2.816 \| good	13.579 \| good	50.155 \| good	0.3 \| good	9.258 \| good	0.265 \| good
2026-04-23T05:00:00.000Z	46 \| good	2.845 \| good	28.6 \| good	49.941 \| good	0.314 \| good	8.862 \| good	0.258 \| good
2026-04-23T06:00:00.000Z	44 \| good	3.37 \| good	22.881 \| good	48.498 \| good	0.299 \| good	10.584 \| good	0.204 \| good
2026-04-23T07:00:00.000Z	45 \| good	4.788 \| good	30.382 \| good	48.68 \| good	0.486 \| good	7.183 \| good	0.152 \| good
2026-04-23T08:00:00.000Z	44 \| good	4.88 \| good	28.879 \| good	46.842 \| good	0.483 \| good	5.352 \| good	0.1 \| good
2026-04-23T09:00:00.000Z	44 \| good	4.606 \| good	31.627 \| good	48.45 \| good	0.296 \| good	4.169 \| good	0.1 \| good
2026-04-23T10:00:00.000Z	44 \| good	3.957 \| good	30.871 \| good	47.883 \| good	0.332 \| good	5.428 \| good	0.1 \| good
2026-04-23T11:00:00.000Z	43 \| good	4.156 \| good	37.528 \| good	45.802 \| good	0.375 \| good	10.862 \| good	0.234 \| good
2026-04-23T12:00:00.000Z	41 \| good	3.876 \| good	22.031 \| good	44.1 \| good	0.428 \| good	16.343 \| good	0.22 \| good
2026-04-23T13:00:00.000Z	42 \| good	3.274 \| good	21.851 \| good	44.879 \| good	0.435 \| good	25.054 \| good	0.324 \| good
2026-04-23T14:00:00.000Z	44 \| good	4.142 \| good	30.277 \| good	47.941 \| good	0.457 \| good	19.793 \| good	0.286 \| good
2026-04-23T15:00:00.000Z	48 \| good	3.804 \| good	21.881 \| good	51.729 \| good	0.533 \| good	14.853 \| good	0.308 \| good
2026-04-23T16:00:00.000Z	50 \| good	2.841 \| good	17.131 \| good	53.571 \| good	0.425 \| good	9.286 \| good	0.204 \| good
2026-04-23T17:00:00.000Z	61 \| moderate	2.287 \| good	14.219 \| good	58.02 \| fine	0.296 \| good	9.009 \| good	0.204 \| good
2026-04-23T18:00:00.000Z	74 \| moderate	2.579 \| good	26.386 \| good	62.206 \| fine	0.426 \| good	7.579 \| good	0.204 \| good
2026-04-23T19:00:00.000Z	64 \| moderate	2.324 \| good	15.78 \| good	58.711 \| fine	0.248 \| good	9.629 \| good	0.262 \| good
2026-04-23T20:00:00.000Z	64 \| moderate	2.758 \| good	26.648 \| good	58.63 \| fine	0.208 \| good	9.147 \| good	0.204 \| good
2026-04-23T21:00:00.000Z	61 \| moderate	2.052 \| good	25.997 \| good	57.811 \| fine	0.362 \| good	10.774 \| good	0.256 \| good
2026-04-23T22:00:00.000Z	54 \| moderate	2.384 \| good	22.662 \| good	56.349 \| fine	0.21 \| good	8.949 \| good	0.286 \| good
2026-04-23T23:00:00.000Z	49 \| good	2.829 \| good	36.744 \| good	53.295 \| good	0.454 \| good	8.691 \| good	0.262 \| good
2026-04-24T00:00:00.000Z	47 \| good	1.604 \| good	9.533 \| good	50.984 \| good	0.423 \| good	7.229 \| good	0.256 \| good
2026-04-24T01:00:00.000Z	46 \| good	1.616 \| good	10.818 \| good	49.873 \| good	0.271 \| good	7.68 \| good	0.256 \| good
2026-04-24T02:00:00.000Z	44 \| good	0.899 \| good	5.953 \| good	47.927 \| good	0.51 \| good	7.547 \| good	0.256 \| good
2026-04-24T03:00:00.000Z	124 \| sensitive	44.517 \| moderate	198.739 \| moderate	43.046 \| good	0.452 \| good	7.489 \| good	0.162 \| good
2026-04-24T04:00:00.000Z	42 \| good	1.151 \| good	5.198 \| good	44.74 \| good	0.381 \| good	5.742 \| good	0.216 \| good
2026-04-24T05:00:00.000Z	41 \| good	1.133 \| good	5.891 \| good	43.879 \| good	0.362 \| good	6.043 \| good	0.229 \| good
2026-04-24T05:00:00.000Z	41 \| good	1.132 \| good	5.869 \| good	44.253 \| good	0.36 \| good	6.255 \| good	0.22 \| good
2026-04-24T05:00:00.000Z	98 \| moderate	34.476 \| fine	149.9 \| fine	45.426 \| good	0.585 \| good	12.078 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	66 \| moderate	17.255 \| fine	76.125 \| fine	49.87 \| good	0.643 \| good	13.447 \| good	0.202 \| good
2026-04-24T07:00:00.000Z	44 \| good	4.668 \| good	20.199 \| good	48.392 \| good	0.561 \| good	10.741 \| good	0.186 \| good
2026-04-24T08:00:00.000Z	46 \| good	1.537 \| good	6.59 \| good	49.769 \| good	0.479 \| good	8.034 \| good	0.169 \| good
2026-04-24T09:00:00.000Z	45 \| good	2.172 \| good	9.023 \| good	48.648 \| good	0.397 \| good	5.328 \| good	0.152 \| good
2026-04-24T10:00:00.000Z	42 \| good	3.376 \| good	13.891 \| good	45.169 \| good	0.378 \| good	4.789 \| good	0.147 \| good
2026-04-24T11:00:00.000Z	32 \| good	4.029 \| good	17.447 \| good	35.122 \| good	0.36 \| good	4.251 \| good	0.142 \| good
2026-04-24T12:00:00.000Z	29 \| good	4.72 \| good	20.339 \| good	31.352 \| good	0.341 \| good	3.712 \| good	0.137 \| good
2026-04-24T13:00:00.000Z	31 \| good	4.084 \| good	17.694 \| good	33.337 \| good	0.401 \| good	3.554 \| good	0.139 \| good
2026-04-24T14:00:00.000Z	35 \| good	5.047 \| good	22.187 \| good	38.053 \| good	0.461 \| good	3.397 \| good	0.141 \| good
2026-04-24T15:00:00.000Z	41 \| good	6.129 \| good	27.078 \| good	44.051 \| good	0.521 \| good	3.239 \| good	0.143 \| good
2026-04-24T16:00:00.000Z	47 \| good	5.269 \| good	23.143 \| good	50.502 \| good	0.425 \| good	2.439 \| good	0.134 \| good
2026-04-24T17:00:00.000Z	49 \| good	3.915 \| good	17.249 \| good	53.261 \| good	0.329 \| good	1.64 \| good	0.124 \| good
2026-04-24T18:00:00.000Z	51 \| moderate	3.884 \| good	17.173 \| good	55.143 \| fine	0.233 \| good	0.841 \| good	0.115 \| good
2026-04-24T19:00:00.000Z	64 \| moderate	4.95 \| good	21.379 \| good	58.633 \| fine	0.208 \| good	0.737 \| good	0.113 \| good
2026-04-24T20:00:00.000Z	77 \| moderate	4.236 \| good	18.856 \| good	63.412 \| fine	0.182 \| good	0.634 \| good	0.111 \| good
2026-04-24T21:00:00.000Z	87 \| moderate	4.354 \| good	19.077 \| good	65.973 \| fine	0.157 \| good	0.531 \| good	0.108 \| good
2026-04-24T22:00:00.000Z	84 \| moderate	5.033 \| good	21.855 \| good	64.949 \| fine	0.157 \| good	0.628 \| good	0.109 \| good
2026-04-24T23:00:00.000Z	80 \| moderate	0.921 \| good	3.423 \| good	64.144 \| fine	0.157 \| good	0.725 \| good	0.11 \| good
2026-04-25T00:00:00.000Z	77 \| moderate	2.733 \| good	11.119 \| good	62.735 \| fine	0.157 \| good	0.823 \| good	0.111 \| good
2026-04-25T01:00:00.000Z	61 \| moderate	2.231 \| good	9.33 \| good	57.749 \| fine	0.245 \| good	2.845 \| good	0.124 \| good
2026-04-25T02:00:00.000Z	42 \| good	3.1 \| good	12.846 \| good	44.938 \| good	0.333 \| good	4.867 \| good	0.137 \| good
2026-04-25T03:00:00.000Z	39 \| good	3.888 \| good	16.771 \| good	41.638 \| good	0.422 \| good	6.89 \| good	0.15 \| good
2026-04-25T04:00:00.000Z	39 \| good	6.243 \| good	27.478 \| good	42.22 \| good	0.45 \| good	8.008 \| good	0.159 \| good
2026-04-25T05:00:00.000Z	54 \| moderate	11.209 \| good	49.698 \| good	45.842 \| good	0.479 \| good	9.126 \| good	0.168 \| good
2026-04-25T06:00:00.000Z	56 \| moderate	11.599 \| good	51.425 \| good	39.238 \| good	0.508 \| good	10.244 \| good	0.177 \| good
2026-04-25T07:00:00.000Z	34 \| good	3.098 \| good	13.185 \| good	37.023 \| good	0.474 \| good	7.73 \| good	0.164 \| good
2026-04-25T08:00:00.000Z	34 \| good	2.419 \| good	10.202 \| good	37.298 \| good	0.439 \| good	5.216 \| good	0.152 \| good
2026-04-25T09:00:00.000Z	35 \| good	1.747 \| good	7.461 \| good	37.517 \| good	0.405 \| good	2.703 \| good	0.139 \| good
2026-04-25T10:00:00.000Z	34 \| good	2.214 \| good	9.13 \| good	37.423 \| good	0.456 \| good	2.856 \| good	0.139 \| good
2026-04-25T11:00:00.000Z	37 \| good	2.671 \| good	10.639 \| good	39.752 \| good	0.506 \| good	3.009 \| good	0.139 \| good
2026-04-25T12:00:00.000Z	40 \| good	3.792 \| good	16.32 \| good	43.056 \| good	0.556 \| good	3.162 \| good	0.139 \| good
2026-04-25T13:00:00.000Z	38 \| good	3.993 \| good	17.614 \| good	41.136 \| good	0.552 \| good	2.984 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	39 \| good	4.348 \| good	19.052 \| good	42.285 \| good	0.547 \| good	2.805 \| good	0.142 \| good
2026-04-25T15:00:00.000Z	37 \| good	5.046 \| good	22.031 \| good	40.4 \| good	0.542 \| good	2.627 \| good	0.143 \| good
2026-04-25T16:00:00.000Z	40 \| good	6.476 \| good	28.838 \| good	42.598 \| good	0.516 \| good	2.304 \| good	0.141 \| good
2026-04-25T17:00:00.000Z	43 \| good	6.487 \| good	28.903 \| good	45.697 \| good	0.49 \| good	1.981 \| good	0.139 \| good
2026-04-25T18:00:00.000Z	44 \| good	5.379 \| good	23.19 \| good	47.409 \| good	0.464 \| good	1.658 \| good	0.136 \| good
2026-04-25T19:00:00.000Z	45 \| good	4.607 \| good	20.315 \| good	49.265 \| good	0.416 \| good	1.418 \| good	0.134 \| good
2026-04-25T20:00:00.000Z	49 \| good	3.777 \| good	16.598 \| good	52.704 \| good	0.368 \| good	1.177 \| good	0.132 \| good
2026-04-25T21:00:00.000Z	54 \| moderate	4.37 \| good	19.13 \| good	55.709 \| fine	0.32 \| good	0.936 \| good	0.13 \| good
2026-04-25T22:00:00.000Z	74 \| moderate	2.653 \| good	10.998 \| good	61.817 \| fine	0.308 \| good	1.181 \| good	0.129 \| good
2026-04-25T23:00:00.000Z	67 \| moderate	1.921 \| good	7.814 \| good	59.913 \| fine	0.297 \| good	1.426 \| good	0.128 \| good
2026-04-26T00:00:00.000Z	61 \| moderate	2.931 \| good	6.114 \| good	58.288 \| fine	0.285 \| good	1.687 \| good	0.128 \| good
2026-04-26T01:00:00.000Z	46 \| good	6.054 \| good	26.821 \| good	50.115 \| good	0.4 \| good	4.492 \| good	0.146 \| good
2026-04-26T02:00:00.000Z	41 \| good	3.945 \| good	16.929 \| good	43.702 \| good	0.516 \| good	7.313 \| good	0.164 \| good
2026-04-26T03:00:00.000Z	45 \| good	2.867 \| good	11.872 \| good	48.535 \| good	0.631 \| good	10.135 \| good	0.182 \| good
2026-04-26T04:00:00.000Z	47 \| good	1.381 \| good	5.618 \| good	51.078 \| good	0.681 \| good	11.336 \| good	0.19 \| good

Highlands Ranch

Get reliable air quality data to drive your business

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

0.16ppm

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 03:00:00 on 2026-04-24.

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 12:00:00 on 2026-04-23.

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

As of now, the AQI in Highlands Ranch, Colorado is 42, indicating Good 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 1.085 μg/m³.

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

The PM₁₀ concentration in Highlands Ranch, Colorado is 4.398 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 0.206 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 0.393 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 45.252 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 5.77 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T06:00:00.000Z	47 \| good	4.723 \| good	23.259 \| good	51.187 \| good	0.646 \| good	13.817 \| good	0.258 \| good
2026-04-22T07:00:00.000Z	46 \| good	4.317 \| good	19.729 \| good	49.597 \| good	0.674 \| good	11.583 \| good	0.298 \| good
2026-04-22T08:00:00.000Z	44 \| good	4.317 \| good	17.5 \| good	48.299 \| good	0.64 \| good	10.603 \| good	0.189 \| good
2026-04-22T09:00:00.000Z	44 \| good	4.111 \| good	16.131 \| good	47.923 \| good	0.641 \| good	9.011 \| good	0.158 \| good
2026-04-22T10:00:00.000Z	43 \| good	3.775 \| good	16.279 \| good	46.342 \| good	0.736 \| good	10.094 \| good	0.166 \| good
2026-04-22T11:00:00.000Z	42 \| good	3.659 \| good	14.647 \| good	44.959 \| good	0.84 \| good	18.291 \| good	0.218 \| good
2026-04-22T12:00:00.000Z	42 \| good	3.8 \| good	12.394 \| good	45.25 \| good	0.883 \| good	25.909 \| good	0.359 \| good
2026-04-22T13:00:00.000Z	39 \| good	3.671 \| good	13.011 \| good	41.634 \| good	0.825 \| good	30.537 \| good	0.39 \| good
2026-04-22T14:00:00.000Z	38 \| good	3.746 \| good	15.885 \| good	41.153 \| good	0.873 \| good	25.364 \| good	0.262 \| good
2026-04-22T15:00:00.000Z	40 \| good	3.935 \| good	16.682 \| good	43.423 \| good	0.875 \| good	23.496 \| good	0.321 \| good
2026-04-22T16:00:00.000Z	44 \| good	3.79 \| good	15.719 \| good	47.165 \| good	0.599 \| good	18.841 \| good	0.314 \| good
2026-04-22T17:00:00.000Z	45 \| good	4.003 \| good	18.513 \| good	49.395 \| good	0.534 \| good	14.357 \| good	0.254 \| good
2026-04-22T18:00:00.000Z	47 \| good	4.073 \| good	24.66 \| good	51.453 \| good	0.433 \| good	11.761 \| good	0.248 \| good
2026-04-22T19:00:00.000Z	49 \| good	2.926 \| good	26.627 \| good	52.783 \| good	0.455 \| good	9.323 \| good	0.182 \| good
2026-04-22T20:00:00.000Z	49 \| good	2.981 \| good	21.114 \| good	52.51 \| good	0.385 \| good	10.097 \| good	0.241 \| good
2026-04-22T21:00:00.000Z	51 \| moderate	3.113 \| good	24.933 \| good	54.849 \| good	0.363 \| good	10.835 \| good	0.27 \| good
2026-04-22T22:00:00.000Z	50 \| good	2.222 \| good	14.955 \| good	54.301 \| good	0.432 \| good	9.686 \| good	0.27 \| good
2026-04-22T23:00:00.000Z	49 \| good	2.463 \| good	19.766 \| good	53.415 \| good	0.32 \| good	8.013 \| good	0.21 \| good
2026-04-23T00:00:00.000Z	59 \| moderate	4.598 \| good	72.238 \| fine	54.113 \| good	0.338 \| good	6.871 \| good	0.21 \| good
2026-04-23T01:00:00.000Z	54 \| moderate	3.535 \| good	60.112 \| fine	55.559 \| fine	0.226 \| good	7.627 \| good	0.204 \| good
2026-04-23T02:00:00.000Z	50 \| good	2.561 \| good	13.259 \| good	54.302 \| good	0.317 \| good	8.075 \| good	0.204 \| good
2026-04-23T03:00:00.000Z	49 \| good	2.47 \| good	13.511 \| good	52.85 \| good	0.424 \| good	8.917 \| good	0.21 \| good
2026-04-23T04:00:00.000Z	46 \| good	2.816 \| good	13.579 \| good	50.155 \| good	0.3 \| good	9.258 \| good	0.265 \| good
2026-04-23T05:00:00.000Z	46 \| good	2.845 \| good	28.6 \| good	49.941 \| good	0.314 \| good	8.862 \| good	0.258 \| good
2026-04-23T06:00:00.000Z	44 \| good	3.37 \| good	22.881 \| good	48.498 \| good	0.299 \| good	10.584 \| good	0.204 \| good
2026-04-23T07:00:00.000Z	45 \| good	4.788 \| good	30.382 \| good	48.68 \| good	0.486 \| good	7.183 \| good	0.152 \| good
2026-04-23T08:00:00.000Z	44 \| good	4.88 \| good	28.879 \| good	46.842 \| good	0.483 \| good	5.352 \| good	0.1 \| good
2026-04-23T09:00:00.000Z	44 \| good	4.606 \| good	31.627 \| good	48.45 \| good	0.296 \| good	4.169 \| good	0.1 \| good
2026-04-23T10:00:00.000Z	44 \| good	3.957 \| good	30.871 \| good	47.883 \| good	0.332 \| good	5.428 \| good	0.1 \| good
2026-04-23T11:00:00.000Z	43 \| good	4.156 \| good	37.528 \| good	45.802 \| good	0.375 \| good	10.862 \| good	0.234 \| good
2026-04-23T12:00:00.000Z	41 \| good	3.876 \| good	22.031 \| good	44.1 \| good	0.428 \| good	16.343 \| good	0.22 \| good
2026-04-23T13:00:00.000Z	42 \| good	3.274 \| good	21.851 \| good	44.879 \| good	0.435 \| good	25.054 \| good	0.324 \| good
2026-04-23T14:00:00.000Z	44 \| good	4.142 \| good	30.277 \| good	47.941 \| good	0.457 \| good	19.793 \| good	0.286 \| good
2026-04-23T15:00:00.000Z	48 \| good	3.804 \| good	21.881 \| good	51.729 \| good	0.533 \| good	14.853 \| good	0.308 \| good
2026-04-23T16:00:00.000Z	50 \| good	2.841 \| good	17.131 \| good	53.571 \| good	0.425 \| good	9.286 \| good	0.204 \| good
2026-04-23T17:00:00.000Z	61 \| moderate	2.287 \| good	14.219 \| good	58.02 \| fine	0.296 \| good	9.009 \| good	0.204 \| good
2026-04-23T18:00:00.000Z	74 \| moderate	2.579 \| good	26.386 \| good	62.206 \| fine	0.426 \| good	7.579 \| good	0.204 \| good
2026-04-23T19:00:00.000Z	64 \| moderate	2.324 \| good	15.78 \| good	58.711 \| fine	0.248 \| good	9.629 \| good	0.262 \| good
2026-04-23T20:00:00.000Z	64 \| moderate	2.758 \| good	26.648 \| good	58.63 \| fine	0.208 \| good	9.147 \| good	0.204 \| good
2026-04-23T21:00:00.000Z	61 \| moderate	2.052 \| good	25.997 \| good	57.811 \| fine	0.362 \| good	10.774 \| good	0.256 \| good
2026-04-23T22:00:00.000Z	54 \| moderate	2.384 \| good	22.662 \| good	56.349 \| fine	0.21 \| good	8.949 \| good	0.286 \| good
2026-04-23T23:00:00.000Z	49 \| good	2.829 \| good	36.744 \| good	53.295 \| good	0.454 \| good	8.691 \| good	0.262 \| good
2026-04-24T00:00:00.000Z	47 \| good	1.604 \| good	9.533 \| good	50.984 \| good	0.423 \| good	7.229 \| good	0.256 \| good
2026-04-24T01:00:00.000Z	46 \| good	1.616 \| good	10.818 \| good	49.873 \| good	0.271 \| good	7.68 \| good	0.256 \| good
2026-04-24T02:00:00.000Z	44 \| good	0.899 \| good	5.953 \| good	47.927 \| good	0.51 \| good	7.547 \| good	0.256 \| good
2026-04-24T03:00:00.000Z	124 \| sensitive	44.517 \| moderate	198.739 \| moderate	43.046 \| good	0.452 \| good	7.489 \| good	0.162 \| good
2026-04-24T04:00:00.000Z	42 \| good	1.151 \| good	5.198 \| good	44.74 \| good	0.381 \| good	5.742 \| good	0.216 \| good
2026-04-24T05:00:00.000Z	41 \| good	1.133 \| good	5.891 \| good	43.879 \| good	0.362 \| good	6.043 \| good	0.229 \| good
2026-04-24T05:00:00.000Z	41 \| good	1.132 \| good	5.869 \| good	44.253 \| good	0.36 \| good	6.255 \| good	0.22 \| good
2026-04-24T05:00:00.000Z	98 \| moderate	34.476 \| fine	149.9 \| fine	45.426 \| good	0.585 \| good	12.078 \| good	0.192 \| good
2026-04-24T06:00:00.000Z	66 \| moderate	17.255 \| fine	76.125 \| fine	49.87 \| good	0.643 \| good	13.447 \| good	0.202 \| good
2026-04-24T07:00:00.000Z	44 \| good	4.668 \| good	20.199 \| good	48.392 \| good	0.561 \| good	10.741 \| good	0.186 \| good
2026-04-24T08:00:00.000Z	46 \| good	1.537 \| good	6.59 \| good	49.769 \| good	0.479 \| good	8.034 \| good	0.169 \| good
2026-04-24T09:00:00.000Z	45 \| good	2.172 \| good	9.023 \| good	48.648 \| good	0.397 \| good	5.328 \| good	0.152 \| good
2026-04-24T10:00:00.000Z	42 \| good	3.376 \| good	13.891 \| good	45.169 \| good	0.378 \| good	4.789 \| good	0.147 \| good
2026-04-24T11:00:00.000Z	32 \| good	4.029 \| good	17.447 \| good	35.122 \| good	0.36 \| good	4.251 \| good	0.142 \| good
2026-04-24T12:00:00.000Z	29 \| good	4.72 \| good	20.339 \| good	31.352 \| good	0.341 \| good	3.712 \| good	0.137 \| good
2026-04-24T13:00:00.000Z	31 \| good	4.084 \| good	17.694 \| good	33.337 \| good	0.401 \| good	3.554 \| good	0.139 \| good
2026-04-24T14:00:00.000Z	35 \| good	5.047 \| good	22.187 \| good	38.053 \| good	0.461 \| good	3.397 \| good	0.141 \| good
2026-04-24T15:00:00.000Z	41 \| good	6.129 \| good	27.078 \| good	44.051 \| good	0.521 \| good	3.239 \| good	0.143 \| good
2026-04-24T16:00:00.000Z	47 \| good	5.269 \| good	23.143 \| good	50.502 \| good	0.425 \| good	2.439 \| good	0.134 \| good
2026-04-24T17:00:00.000Z	49 \| good	3.915 \| good	17.249 \| good	53.261 \| good	0.329 \| good	1.64 \| good	0.124 \| good
2026-04-24T18:00:00.000Z	51 \| moderate	3.884 \| good	17.173 \| good	55.143 \| fine	0.233 \| good	0.841 \| good	0.115 \| good
2026-04-24T19:00:00.000Z	64 \| moderate	4.95 \| good	21.379 \| good	58.633 \| fine	0.208 \| good	0.737 \| good	0.113 \| good
2026-04-24T20:00:00.000Z	77 \| moderate	4.236 \| good	18.856 \| good	63.412 \| fine	0.182 \| good	0.634 \| good	0.111 \| good
2026-04-24T21:00:00.000Z	87 \| moderate	4.354 \| good	19.077 \| good	65.973 \| fine	0.157 \| good	0.531 \| good	0.108 \| good
2026-04-24T22:00:00.000Z	84 \| moderate	5.033 \| good	21.855 \| good	64.949 \| fine	0.157 \| good	0.628 \| good	0.109 \| good
2026-04-24T23:00:00.000Z	80 \| moderate	0.921 \| good	3.423 \| good	64.144 \| fine	0.157 \| good	0.725 \| good	0.11 \| good
2026-04-25T00:00:00.000Z	77 \| moderate	2.733 \| good	11.119 \| good	62.735 \| fine	0.157 \| good	0.823 \| good	0.111 \| good
2026-04-25T01:00:00.000Z	61 \| moderate	2.231 \| good	9.33 \| good	57.749 \| fine	0.245 \| good	2.845 \| good	0.124 \| good
2026-04-25T02:00:00.000Z	42 \| good	3.1 \| good	12.846 \| good	44.938 \| good	0.333 \| good	4.867 \| good	0.137 \| good
2026-04-25T03:00:00.000Z	39 \| good	3.888 \| good	16.771 \| good	41.638 \| good	0.422 \| good	6.89 \| good	0.15 \| good
2026-04-25T04:00:00.000Z	39 \| good	6.243 \| good	27.478 \| good	42.22 \| good	0.45 \| good	8.008 \| good	0.159 \| good
2026-04-25T05:00:00.000Z	54 \| moderate	11.209 \| good	49.698 \| good	45.842 \| good	0.479 \| good	9.126 \| good	0.168 \| good
2026-04-25T06:00:00.000Z	56 \| moderate	11.599 \| good	51.425 \| good	39.238 \| good	0.508 \| good	10.244 \| good	0.177 \| good
2026-04-25T07:00:00.000Z	34 \| good	3.098 \| good	13.185 \| good	37.023 \| good	0.474 \| good	7.73 \| good	0.164 \| good
2026-04-25T08:00:00.000Z	34 \| good	2.419 \| good	10.202 \| good	37.298 \| good	0.439 \| good	5.216 \| good	0.152 \| good
2026-04-25T09:00:00.000Z	35 \| good	1.747 \| good	7.461 \| good	37.517 \| good	0.405 \| good	2.703 \| good	0.139 \| good
2026-04-25T10:00:00.000Z	34 \| good	2.214 \| good	9.13 \| good	37.423 \| good	0.456 \| good	2.856 \| good	0.139 \| good
2026-04-25T11:00:00.000Z	37 \| good	2.671 \| good	10.639 \| good	39.752 \| good	0.506 \| good	3.009 \| good	0.139 \| good
2026-04-25T12:00:00.000Z	40 \| good	3.792 \| good	16.32 \| good	43.056 \| good	0.556 \| good	3.162 \| good	0.139 \| good
2026-04-25T13:00:00.000Z	38 \| good	3.993 \| good	17.614 \| good	41.136 \| good	0.552 \| good	2.984 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	39 \| good	4.348 \| good	19.052 \| good	42.285 \| good	0.547 \| good	2.805 \| good	0.142 \| good
2026-04-25T15:00:00.000Z	37 \| good	5.046 \| good	22.031 \| good	40.4 \| good	0.542 \| good	2.627 \| good	0.143 \| good
2026-04-25T16:00:00.000Z	40 \| good	6.476 \| good	28.838 \| good	42.598 \| good	0.516 \| good	2.304 \| good	0.141 \| good
2026-04-25T17:00:00.000Z	43 \| good	6.487 \| good	28.903 \| good	45.697 \| good	0.49 \| good	1.981 \| good	0.139 \| good
2026-04-25T18:00:00.000Z	44 \| good	5.379 \| good	23.19 \| good	47.409 \| good	0.464 \| good	1.658 \| good	0.136 \| good
2026-04-25T19:00:00.000Z	45 \| good	4.607 \| good	20.315 \| good	49.265 \| good	0.416 \| good	1.418 \| good	0.134 \| good
2026-04-25T20:00:00.000Z	49 \| good	3.777 \| good	16.598 \| good	52.704 \| good	0.368 \| good	1.177 \| good	0.132 \| good
2026-04-25T21:00:00.000Z	54 \| moderate	4.37 \| good	19.13 \| good	55.709 \| fine	0.32 \| good	0.936 \| good	0.13 \| good
2026-04-25T22:00:00.000Z	74 \| moderate	2.653 \| good	10.998 \| good	61.817 \| fine	0.308 \| good	1.181 \| good	0.129 \| good
2026-04-25T23:00:00.000Z	67 \| moderate	1.921 \| good	7.814 \| good	59.913 \| fine	0.297 \| good	1.426 \| good	0.128 \| good
2026-04-26T00:00:00.000Z	61 \| moderate	2.931 \| good	6.114 \| good	58.288 \| fine	0.285 \| good	1.687 \| good	0.128 \| good
2026-04-26T01:00:00.000Z	46 \| good	6.054 \| good	26.821 \| good	50.115 \| good	0.4 \| good	4.492 \| good	0.146 \| good
2026-04-26T02:00:00.000Z	41 \| good	3.945 \| good	16.929 \| good	43.702 \| good	0.516 \| good	7.313 \| good	0.164 \| good
2026-04-26T03:00:00.000Z	45 \| good	2.867 \| good	11.872 \| good	48.535 \| good	0.631 \| good	10.135 \| good	0.182 \| good
2026-04-26T04:00:00.000Z	47 \| good	1.381 \| good	5.618 \| good	51.078 \| good	0.681 \| good	11.336 \| good	0.19 \| 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?