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 0.574 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 27.191 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 32.241 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 5.425 μg/m3.

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

The PM10 concentration in Highlands Ranch, Colorado is 19.772 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)

5.42 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

19.77 μg/m³

155

255

425

605+

Ozone (O₃)

27.19 ppb

201

201+

Sulfur Dioxide (SO₂)

0.57 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

32.24 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.42 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
2026-01-21T06:00:00.000Z	32 \| good	4.119 \| good	15.969 \| good	35.128 \| good	0.32 \| good	10.502 \| good	0.202 \| good
2026-01-21T07:00:00.000Z	33 \| good	3.946 \| good	18.369 \| good	36.322 \| good	0.229 \| good	15.139 \| good	0.235 \| good
2026-01-21T08:00:00.000Z	31 \| good	3.85 \| good	17.5 \| good	33.632 \| good	0.228 \| good	18.143 \| good	0.235 \| good
2026-01-21T09:00:00.000Z	30 \| good	3.841 \| good	18.353 \| good	32.264 \| good	0.274 \| good	21.352 \| good	0.283 \| good
2026-01-21T10:00:00.000Z	29 \| good	3.344 \| good	13.587 \| good	31.225 \| good	0.286 \| good	21.652 \| good	0.243 \| good
2026-01-21T11:00:00.000Z	33 \| good	3.091 \| good	12.347 \| good	35.87 \| good	0.428 \| good	22.31 \| good	0.245 \| good
2026-01-21T12:00:00.000Z	32 \| good	2.583 \| good	10.043 \| good	35.315 \| good	0.546 \| good	22.072 \| good	0.251 \| good
2026-01-21T13:00:00.000Z	31 \| good	2.66 \| good	11.552 \| good	34.321 \| good	0.619 \| good	29.134 \| good	0.388 \| good
2026-01-21T14:00:00.000Z	36 \| good	2.396 \| good	9.861 \| good	32.983 \| good	1.072 \| good	38.286 \| good	0.501 \| good
2026-01-21T15:00:00.000Z	38 \| good	3.839 \| good	17.401 \| good	32.415 \| good	1.422 \| good	39.854 \| good	0.943 \| good
2026-01-21T16:00:00.000Z	40 \| good	4.949 \| good	29.056 \| good	30.475 \| good	1.93 \| good	41.791 \| good	1.157 \| good
2026-01-21T17:00:00.000Z	37 \| good	4.626 \| good	24.971 \| good	34.473 \| good	2.177 \| good	38.677 \| good	0.761 \| good
2026-01-21T18:00:00.000Z	31 \| good	4.682 \| good	21.253 \| good	34.015 \| good	1.695 \| good	33.153 \| good	0.659 \| good
2026-01-21T19:00:00.000Z	31 \| good	4.078 \| good	20.139 \| good	34.305 \| good	1.479 \| good	25.86 \| good	0.337 \| good
2026-01-21T20:00:00.000Z	35 \| good	3.005 \| good	17.184 \| good	37.798 \| good	0.597 \| good	16.311 \| good	0.201 \| good
2026-01-21T21:00:00.000Z	40 \| good	2.82 \| good	12.255 \| good	42.86 \| good	0.352 \| good	13.506 \| good	0.189 \| good
2026-01-21T22:00:00.000Z	42 \| good	2.269 \| good	11.48 \| good	44.746 \| good	0.432 \| good	11.082 \| good	0.178 \| good
2026-01-21T23:00:00.000Z	39 \| good	2.356 \| good	13.424 \| good	42.025 \| good	0.742 \| good	16.39 \| good	0.235 \| good
2026-01-22T00:00:00.000Z	36 \| good	2.404 \| good	13.031 \| good	38.704 \| good	0.601 \| good	23.681 \| good	0.33 \| good
2026-01-22T01:00:00.000Z	37 \| good	2.691 \| good	14.283 \| good	40.265 \| good	0.576 \| good	22.911 \| good	0.379 \| good
2026-01-22T02:00:00.000Z	35 \| good	4.132 \| good	18.038 \| good	37.923 \| good	0.49 \| good	19.262 \| good	0.339 \| good
2026-01-22T03:00:00.000Z	32 \| good	2.927 \| good	14.782 \| good	35.001 \| good	0.449 \| good	11.828 \| good	0.291 \| good
2026-01-22T04:00:00.000Z	32 \| good	2.766 \| good	12.152 \| good	35.008 \| good	0.361 \| good	10.242 \| good	0.298 \| good
2026-01-22T05:00:00.000Z	31 \| good	3.225 \| good	14.967 \| good	33.02 \| good	0.335 \| good	17.218 \| good	0.302 \| good
2026-01-22T06:00:00.000Z	30 \| good	3.799 \| good	19.147 \| good	31.792 \| good	0.352 \| good	15.873 \| good	0.345 \| good
2026-01-22T07:00:00.000Z	27 \| good	3.514 \| good	17.435 \| good	29.408 \| good	0.352 \| good	18.548 \| good	0.243 \| good
2026-01-22T08:00:00.000Z	24 \| good	3.672 \| good	17.101 \| good	25.936 \| good	0.374 \| good	25.096 \| good	0.283 \| good
2026-01-22T09:00:00.000Z	25 \| good	3.865 \| good	15.52 \| good	22.58 \| good	0.422 \| good	27.086 \| good	0.283 \| good
2026-01-22T10:00:00.000Z	30 \| good	4 \| good	16.556 \| good	18.318 \| good	0.457 \| good	31.569 \| good	0.324 \| good
2026-01-22T11:00:00.000Z	33 \| good	3.97 \| good	16.23 \| good	16.358 \| good	0.435 \| good	35.009 \| good	0.419 \| good
2026-01-22T12:00:00.000Z	37 \| good	3.689 \| good	15.16 \| good	13.493 \| good	0.685 \| good	39.382 \| good	0.453 \| good
2026-01-22T13:00:00.000Z	38 \| good	3.762 \| good	12.626 \| good	7.853 \| good	1.008 \| good	39.865 \| good	0.54 \| good
2026-01-22T14:00:00.000Z	39 \| good	5.051 \| good	23.256 \| good	4.043 \| good	1.199 \| good	41.017 \| good	0.67 \| good
2026-01-22T15:00:00.000Z	39 \| good	5.494 \| good	29.264 \| good	6.754 \| good	1.792 \| good	40.622 \| good	0.778 \| good
2026-01-22T16:00:00.000Z	38 \| good	4.737 \| good	18.93 \| good	12.876 \| good	2.086 \| good	39.858 \| good	0.832 \| good
2026-01-22T17:00:00.000Z	33 \| good	6.273 \| good	28.193 \| good	14.845 \| good	2.122 \| good	34.718 \| good	0.75 \| good
2026-01-22T18:00:00.000Z	38 \| good	6.675 \| good	30.486 \| good	18.446 \| good	0.71 \| good	20.825 \| good	0.364 \| good
2026-01-22T19:00:00.000Z	33 \| good	6.416 \| good	28.745 \| good	18.849 \| good	0.64 \| good	17.326 \| good	0.324 \| good
2026-01-22T20:00:00.000Z	33 \| good	5.667 \| good	22.654 \| good	24.555 \| good	0.638 \| good	14.819 \| good	0.324 \| good
2026-01-22T21:00:00.000Z	33 \| good	5.589 \| good	24.396 \| good	29.605 \| good	0.673 \| good	14.005 \| good	0.269 \| good
2026-01-22T22:00:00.000Z	31 \| good	5.116 \| good	23.074 \| good	33.989 \| good	0.401 \| good	12.205 \| good	0.262 \| good
2026-01-22T23:00:00.000Z	32 \| good	4.968 \| good	20.721 \| good	34.793 \| good	0.429 \| good	12.222 \| good	0.262 \| good
2026-01-23T00:00:00.000Z	32 \| good	4.067 \| good	16.945 \| good	35.382 \| good	0.399 \| good	13.074 \| good	0.242 \| good
2026-01-23T01:00:00.000Z	31 \| good	4.216 \| good	18.279 \| good	34.184 \| good	0.454 \| good	13.851 \| good	0.25 \| good
2026-01-23T02:00:00.000Z	31 \| good	4.498 \| good	20.566 \| good	33.32 \| good	0.56 \| good	17.867 \| good	0.229 \| good
2026-01-23T03:00:00.000Z	30 \| good	4.657 \| good	18.863 \| good	31.858 \| good	0.51 \| good	23.349 \| good	0.317 \| good
2026-01-23T04:00:00.000Z	30 \| good	5.338 \| good	19.773 \| good	25.544 \| good	0.571 \| good	32.169 \| good	0.424 \| good
2026-01-23T05:00:00.000Z	30 \| good	5.425 \| good	19.772 \| good	27.191 \| good	0.574 \| good	32.241 \| good	0.423 \| good
2026-01-23T06:00:00.000Z	38 \| good	7.261 \| good	31.751 \| good	28.375 \| good	1.089 \| good	15.871 \| good	0.232 \| good
2026-01-23T07:00:00.000Z	38 \| good	7.211 \| good	31.295 \| good	24.018 \| good	0.995 \| good	14.48 \| good	0.222 \| good
2026-01-23T08:00:00.000Z	44 \| good	7.675 \| good	33.72 \| good	22.673 \| good	0.902 \| good	13.089 \| good	0.211 \| good
2026-01-23T09:00:00.000Z	44 \| good	7.968 \| good	34.673 \| good	21.741 \| good	0.809 \| good	11.698 \| good	0.2 \| good
2026-01-23T10:00:00.000Z	38 \| good	7.475 \| good	33.174 \| good	21.831 \| good	0.768 \| good	10.836 \| good	0.194 \| good
2026-01-23T11:00:00.000Z	38 \| good	6.939 \| good	30.98 \| good	21.529 \| good	0.727 \| good	9.973 \| good	0.188 \| good
2026-01-23T12:00:00.000Z	38 \| good	7.452 \| good	32.595 \| good	19.083 \| good	0.686 \| good	9.111 \| good	0.181 \| good
2026-01-23T13:00:00.000Z	44 \| good	8.31 \| good	36.388 \| good	15.372 \| good	0.742 \| good	8.906 \| good	0.19 \| good
2026-01-23T14:00:00.000Z	49 \| good	8.638 \| good	37.752 \| good	10.918 \| good	0.798 \| good	8.7 \| good	0.199 \| good
2026-01-23T15:00:00.000Z	38 \| good	6.766 \| good	29.885 \| good	12.489 \| good	0.854 \| good	8.495 \| good	0.208 \| good
2026-01-23T16:00:00.000Z	38 \| good	6.843 \| good	30.096 \| good	18.361 \| good	0.864 \| good	6.991 \| good	0.201 \| good
2026-01-23T17:00:00.000Z	38 \| good	6.506 \| good	28.977 \| good	23.035 \| good	0.874 \| good	5.487 \| good	0.194 \| good
2026-01-23T18:00:00.000Z	33 \| good	6.468 \| good	28.939 \| good	27.406 \| good	0.884 \| good	3.983 \| good	0.187 \| good
2026-01-23T19:00:00.000Z	33 \| good	5.975 \| good	26.61 \| good	27.988 \| good	0.869 \| good	3.675 \| good	0.184 \| good
2026-01-23T20:00:00.000Z	27 \| good	5.225 \| good	22.739 \| good	29.264 \| good	0.855 \| good	3.368 \| good	0.181 \| good
2026-01-23T21:00:00.000Z	28 \| good	5.469 \| good	23.357 \| good	29.696 \| good	0.84 \| good	3.06 \| good	0.178 \| good
2026-01-23T22:00:00.000Z	27 \| good	4.775 \| good	20.938 \| good	29.085 \| good	0.826 \| good	3.974 \| good	0.181 \| good
2026-01-23T23:00:00.000Z	25 \| good	2.828 \| good	11.96 \| good	26.803 \| good	0.812 \| good	4.888 \| good	0.183 \| good
2026-01-24T00:00:00.000Z	27 \| good	4.838 \| good	20.967 \| good	24.561 \| good	0.797 \| good	5.802 \| good	0.186 \| good
2026-01-24T01:00:00.000Z	49 \| good	9.226 \| good	40.864 \| good	19.961 \| good	0.814 \| good	6.239 \| good	0.185 \| good
2026-01-24T02:00:00.000Z	54 \| moderate	11.056 \| good	49.09 \| good	17.481 \| good	0.831 \| good	6.675 \| good	0.184 \| good
2026-01-24T03:00:00.000Z	44 \| good	8.465 \| good	37.38 \| good	23.073 \| good	0.848 \| good	7.112 \| good	0.183 \| good
2026-01-24T04:00:00.000Z	38 \| good	7.041 \| good	30.978 \| good	26.1 \| good	0.805 \| good	6.564 \| good	0.177 \| good
2026-01-24T05:00:00.000Z	27 \| good	5.06 \| good	21.744 \| good	27.208 \| good	0.762 \| good	6.016 \| good	0.171 \| good
2026-01-24T06:00:00.000Z	27 \| good	4.806 \| good	20.98 \| good	26.372 \| good	0.719 \| good	5.468 \| good	0.166 \| good
2026-01-24T07:00:00.000Z	27 \| good	4.53 \| good	19.848 \| good	21.909 \| good	0.665 \| good	4.879 \| good	0.161 \| good
2026-01-24T08:00:00.000Z	27 \| good	4.522 \| good	19.681 \| good	22.688 \| good	0.61 \| good	4.29 \| good	0.157 \| good
2026-01-24T09:00:00.000Z	27 \| good	4.712 \| good	20.416 \| good	22.433 \| good	0.555 \| good	3.701 \| good	0.152 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.13 \| good	22.223 \| good	22.51 \| good	0.587 \| good	3.698 \| good	0.151 \| good
2026-01-24T11:00:00.000Z	33 \| good	5.831 \| good	25.808 \| good	22.079 \| good	0.618 \| good	3.695 \| good	0.15 \| good
2026-01-24T12:00:00.000Z	33 \| good	6.25 \| good	27.789 \| good	19.962 \| good	0.65 \| good	3.693 \| good	0.149 \| good
2026-01-24T13:00:00.000Z	33 \| good	5.569 \| good	23.873 \| good	17.972 \| good	0.715 \| good	4.485 \| good	0.154 \| good
2026-01-24T14:00:00.000Z	33 \| good	5.986 \| good	26.671 \| good	16.899 \| good	0.781 \| good	5.278 \| good	0.16 \| good
2026-01-24T15:00:00.000Z	38 \| good	6.646 \| good	29.825 \| good	18.601 \| good	0.846 \| good	6.071 \| good	0.165 \| good
2026-01-24T16:00:00.000Z	38 \| good	6.912 \| good	30.497 \| good	22.171 \| good	0.887 \| good	5.245 \| good	0.165 \| good
2026-01-24T17:00:00.000Z	38 \| good	7.09 \| good	31.47 \| good	26.622 \| good	0.928 \| good	4.42 \| good	0.165 \| good
2026-01-24T18:00:00.000Z	33 \| good	6.285 \| good	28.103 \| good	31.649 \| good	0.969 \| good	3.595 \| good	0.164 \| good
2026-01-24T19:00:00.000Z	38 \| good	6.675 \| good	29.948 \| good	32.714 \| good	0.959 \| good	3.351 \| good	0.163 \| good
2026-01-24T20:00:00.000Z	38 \| good	6.625 \| good	29.751 \| good	32.506 \| good	0.949 \| good	3.107 \| good	0.161 \| good
2026-01-24T21:00:00.000Z	38 \| good	6.998 \| good	31.011 \| good	32.069 \| good	0.939 \| good	2.863 \| good	0.159 \| good
2026-01-24T22:00:00.000Z	38 \| good	6.583 \| good	29.29 \| good	33.469 \| good	0.914 \| good	3.949 \| good	0.162 \| good
2026-01-24T23:00:00.000Z	38 \| good	7.378 \| good	32.435 \| good	33.665 \| good	0.888 \| good	5.035 \| good	0.164 \| good
2026-01-25T00:00:00.000Z	28 \| good	5.313 \| good	5.416 \| good	29.973 \| good	0.857 \| good	6.041 \| good	0.165 \| good
2026-01-25T01:00:00.000Z	27 \| good	5.382 \| good	23.332 \| good	20.704 \| good	0.872 \| good	7.297 \| good	0.172 \| good
2026-01-25T02:00:00.000Z	33 \| good	6.123 \| good	26.713 \| good	21.77 \| good	0.88 \| good	8.473 \| good	0.178 \| good
2026-01-25T03:00:00.000Z	44 \| good	7.642 \| good	33.836 \| good	19.862 \| good	0.889 \| good	9.65 \| good	0.183 \| good
2026-01-25T04:00:00.000Z	52 \| moderate	10.201 \| good	45.093 \| good	14.691 \| good	0.894 \| good	11.125 \| good	0.19 \| good
2026-01-25T05:00:00.000Z	56 \| moderate	11.869 \| good	53.159 \| good	16.577 \| good	0.899 \| good	12.6 \| good	0.198 \| good

Highlands Ranch

Get reliable air quality data to drive your business

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

0.42ppm

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

Air quality levels in US

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

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 2026-01-22.

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 08:00:00 on 2026-01-22.

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

As of now, the AQI in Highlands Ranch, Colorado is 30, indicating Good conditions.

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

Highlands Ranch, Colorado air has the highest levels of NO2.

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 5.425 μg/m³.

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

The PM₁₀ concentration in Highlands Ranch, Colorado is 19.772 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 0.423 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 0.574 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 27.191 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 32.241 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T06:00:00.000Z	32 \| good	4.119 \| good	15.969 \| good	35.128 \| good	0.32 \| good	10.502 \| good	0.202 \| good
2026-01-21T07:00:00.000Z	33 \| good	3.946 \| good	18.369 \| good	36.322 \| good	0.229 \| good	15.139 \| good	0.235 \| good
2026-01-21T08:00:00.000Z	31 \| good	3.85 \| good	17.5 \| good	33.632 \| good	0.228 \| good	18.143 \| good	0.235 \| good
2026-01-21T09:00:00.000Z	30 \| good	3.841 \| good	18.353 \| good	32.264 \| good	0.274 \| good	21.352 \| good	0.283 \| good
2026-01-21T10:00:00.000Z	29 \| good	3.344 \| good	13.587 \| good	31.225 \| good	0.286 \| good	21.652 \| good	0.243 \| good
2026-01-21T11:00:00.000Z	33 \| good	3.091 \| good	12.347 \| good	35.87 \| good	0.428 \| good	22.31 \| good	0.245 \| good
2026-01-21T12:00:00.000Z	32 \| good	2.583 \| good	10.043 \| good	35.315 \| good	0.546 \| good	22.072 \| good	0.251 \| good
2026-01-21T13:00:00.000Z	31 \| good	2.66 \| good	11.552 \| good	34.321 \| good	0.619 \| good	29.134 \| good	0.388 \| good
2026-01-21T14:00:00.000Z	36 \| good	2.396 \| good	9.861 \| good	32.983 \| good	1.072 \| good	38.286 \| good	0.501 \| good
2026-01-21T15:00:00.000Z	38 \| good	3.839 \| good	17.401 \| good	32.415 \| good	1.422 \| good	39.854 \| good	0.943 \| good
2026-01-21T16:00:00.000Z	40 \| good	4.949 \| good	29.056 \| good	30.475 \| good	1.93 \| good	41.791 \| good	1.157 \| good
2026-01-21T17:00:00.000Z	37 \| good	4.626 \| good	24.971 \| good	34.473 \| good	2.177 \| good	38.677 \| good	0.761 \| good
2026-01-21T18:00:00.000Z	31 \| good	4.682 \| good	21.253 \| good	34.015 \| good	1.695 \| good	33.153 \| good	0.659 \| good
2026-01-21T19:00:00.000Z	31 \| good	4.078 \| good	20.139 \| good	34.305 \| good	1.479 \| good	25.86 \| good	0.337 \| good
2026-01-21T20:00:00.000Z	35 \| good	3.005 \| good	17.184 \| good	37.798 \| good	0.597 \| good	16.311 \| good	0.201 \| good
2026-01-21T21:00:00.000Z	40 \| good	2.82 \| good	12.255 \| good	42.86 \| good	0.352 \| good	13.506 \| good	0.189 \| good
2026-01-21T22:00:00.000Z	42 \| good	2.269 \| good	11.48 \| good	44.746 \| good	0.432 \| good	11.082 \| good	0.178 \| good
2026-01-21T23:00:00.000Z	39 \| good	2.356 \| good	13.424 \| good	42.025 \| good	0.742 \| good	16.39 \| good	0.235 \| good
2026-01-22T00:00:00.000Z	36 \| good	2.404 \| good	13.031 \| good	38.704 \| good	0.601 \| good	23.681 \| good	0.33 \| good
2026-01-22T01:00:00.000Z	37 \| good	2.691 \| good	14.283 \| good	40.265 \| good	0.576 \| good	22.911 \| good	0.379 \| good
2026-01-22T02:00:00.000Z	35 \| good	4.132 \| good	18.038 \| good	37.923 \| good	0.49 \| good	19.262 \| good	0.339 \| good
2026-01-22T03:00:00.000Z	32 \| good	2.927 \| good	14.782 \| good	35.001 \| good	0.449 \| good	11.828 \| good	0.291 \| good
2026-01-22T04:00:00.000Z	32 \| good	2.766 \| good	12.152 \| good	35.008 \| good	0.361 \| good	10.242 \| good	0.298 \| good
2026-01-22T05:00:00.000Z	31 \| good	3.225 \| good	14.967 \| good	33.02 \| good	0.335 \| good	17.218 \| good	0.302 \| good
2026-01-22T06:00:00.000Z	30 \| good	3.799 \| good	19.147 \| good	31.792 \| good	0.352 \| good	15.873 \| good	0.345 \| good
2026-01-22T07:00:00.000Z	27 \| good	3.514 \| good	17.435 \| good	29.408 \| good	0.352 \| good	18.548 \| good	0.243 \| good
2026-01-22T08:00:00.000Z	24 \| good	3.672 \| good	17.101 \| good	25.936 \| good	0.374 \| good	25.096 \| good	0.283 \| good
2026-01-22T09:00:00.000Z	25 \| good	3.865 \| good	15.52 \| good	22.58 \| good	0.422 \| good	27.086 \| good	0.283 \| good
2026-01-22T10:00:00.000Z	30 \| good	4 \| good	16.556 \| good	18.318 \| good	0.457 \| good	31.569 \| good	0.324 \| good
2026-01-22T11:00:00.000Z	33 \| good	3.97 \| good	16.23 \| good	16.358 \| good	0.435 \| good	35.009 \| good	0.419 \| good
2026-01-22T12:00:00.000Z	37 \| good	3.689 \| good	15.16 \| good	13.493 \| good	0.685 \| good	39.382 \| good	0.453 \| good
2026-01-22T13:00:00.000Z	38 \| good	3.762 \| good	12.626 \| good	7.853 \| good	1.008 \| good	39.865 \| good	0.54 \| good
2026-01-22T14:00:00.000Z	39 \| good	5.051 \| good	23.256 \| good	4.043 \| good	1.199 \| good	41.017 \| good	0.67 \| good
2026-01-22T15:00:00.000Z	39 \| good	5.494 \| good	29.264 \| good	6.754 \| good	1.792 \| good	40.622 \| good	0.778 \| good
2026-01-22T16:00:00.000Z	38 \| good	4.737 \| good	18.93 \| good	12.876 \| good	2.086 \| good	39.858 \| good	0.832 \| good
2026-01-22T17:00:00.000Z	33 \| good	6.273 \| good	28.193 \| good	14.845 \| good	2.122 \| good	34.718 \| good	0.75 \| good
2026-01-22T18:00:00.000Z	38 \| good	6.675 \| good	30.486 \| good	18.446 \| good	0.71 \| good	20.825 \| good	0.364 \| good
2026-01-22T19:00:00.000Z	33 \| good	6.416 \| good	28.745 \| good	18.849 \| good	0.64 \| good	17.326 \| good	0.324 \| good
2026-01-22T20:00:00.000Z	33 \| good	5.667 \| good	22.654 \| good	24.555 \| good	0.638 \| good	14.819 \| good	0.324 \| good
2026-01-22T21:00:00.000Z	33 \| good	5.589 \| good	24.396 \| good	29.605 \| good	0.673 \| good	14.005 \| good	0.269 \| good
2026-01-22T22:00:00.000Z	31 \| good	5.116 \| good	23.074 \| good	33.989 \| good	0.401 \| good	12.205 \| good	0.262 \| good
2026-01-22T23:00:00.000Z	32 \| good	4.968 \| good	20.721 \| good	34.793 \| good	0.429 \| good	12.222 \| good	0.262 \| good
2026-01-23T00:00:00.000Z	32 \| good	4.067 \| good	16.945 \| good	35.382 \| good	0.399 \| good	13.074 \| good	0.242 \| good
2026-01-23T01:00:00.000Z	31 \| good	4.216 \| good	18.279 \| good	34.184 \| good	0.454 \| good	13.851 \| good	0.25 \| good
2026-01-23T02:00:00.000Z	31 \| good	4.498 \| good	20.566 \| good	33.32 \| good	0.56 \| good	17.867 \| good	0.229 \| good
2026-01-23T03:00:00.000Z	30 \| good	4.657 \| good	18.863 \| good	31.858 \| good	0.51 \| good	23.349 \| good	0.317 \| good
2026-01-23T04:00:00.000Z	30 \| good	5.338 \| good	19.773 \| good	25.544 \| good	0.571 \| good	32.169 \| good	0.424 \| good
2026-01-23T05:00:00.000Z	30 \| good	5.425 \| good	19.772 \| good	27.191 \| good	0.574 \| good	32.241 \| good	0.423 \| good
2026-01-23T06:00:00.000Z	38 \| good	7.261 \| good	31.751 \| good	28.375 \| good	1.089 \| good	15.871 \| good	0.232 \| good
2026-01-23T07:00:00.000Z	38 \| good	7.211 \| good	31.295 \| good	24.018 \| good	0.995 \| good	14.48 \| good	0.222 \| good
2026-01-23T08:00:00.000Z	44 \| good	7.675 \| good	33.72 \| good	22.673 \| good	0.902 \| good	13.089 \| good	0.211 \| good
2026-01-23T09:00:00.000Z	44 \| good	7.968 \| good	34.673 \| good	21.741 \| good	0.809 \| good	11.698 \| good	0.2 \| good
2026-01-23T10:00:00.000Z	38 \| good	7.475 \| good	33.174 \| good	21.831 \| good	0.768 \| good	10.836 \| good	0.194 \| good
2026-01-23T11:00:00.000Z	38 \| good	6.939 \| good	30.98 \| good	21.529 \| good	0.727 \| good	9.973 \| good	0.188 \| good
2026-01-23T12:00:00.000Z	38 \| good	7.452 \| good	32.595 \| good	19.083 \| good	0.686 \| good	9.111 \| good	0.181 \| good
2026-01-23T13:00:00.000Z	44 \| good	8.31 \| good	36.388 \| good	15.372 \| good	0.742 \| good	8.906 \| good	0.19 \| good
2026-01-23T14:00:00.000Z	49 \| good	8.638 \| good	37.752 \| good	10.918 \| good	0.798 \| good	8.7 \| good	0.199 \| good
2026-01-23T15:00:00.000Z	38 \| good	6.766 \| good	29.885 \| good	12.489 \| good	0.854 \| good	8.495 \| good	0.208 \| good
2026-01-23T16:00:00.000Z	38 \| good	6.843 \| good	30.096 \| good	18.361 \| good	0.864 \| good	6.991 \| good	0.201 \| good
2026-01-23T17:00:00.000Z	38 \| good	6.506 \| good	28.977 \| good	23.035 \| good	0.874 \| good	5.487 \| good	0.194 \| good
2026-01-23T18:00:00.000Z	33 \| good	6.468 \| good	28.939 \| good	27.406 \| good	0.884 \| good	3.983 \| good	0.187 \| good
2026-01-23T19:00:00.000Z	33 \| good	5.975 \| good	26.61 \| good	27.988 \| good	0.869 \| good	3.675 \| good	0.184 \| good
2026-01-23T20:00:00.000Z	27 \| good	5.225 \| good	22.739 \| good	29.264 \| good	0.855 \| good	3.368 \| good	0.181 \| good
2026-01-23T21:00:00.000Z	28 \| good	5.469 \| good	23.357 \| good	29.696 \| good	0.84 \| good	3.06 \| good	0.178 \| good
2026-01-23T22:00:00.000Z	27 \| good	4.775 \| good	20.938 \| good	29.085 \| good	0.826 \| good	3.974 \| good	0.181 \| good
2026-01-23T23:00:00.000Z	25 \| good	2.828 \| good	11.96 \| good	26.803 \| good	0.812 \| good	4.888 \| good	0.183 \| good
2026-01-24T00:00:00.000Z	27 \| good	4.838 \| good	20.967 \| good	24.561 \| good	0.797 \| good	5.802 \| good	0.186 \| good
2026-01-24T01:00:00.000Z	49 \| good	9.226 \| good	40.864 \| good	19.961 \| good	0.814 \| good	6.239 \| good	0.185 \| good
2026-01-24T02:00:00.000Z	54 \| moderate	11.056 \| good	49.09 \| good	17.481 \| good	0.831 \| good	6.675 \| good	0.184 \| good
2026-01-24T03:00:00.000Z	44 \| good	8.465 \| good	37.38 \| good	23.073 \| good	0.848 \| good	7.112 \| good	0.183 \| good
2026-01-24T04:00:00.000Z	38 \| good	7.041 \| good	30.978 \| good	26.1 \| good	0.805 \| good	6.564 \| good	0.177 \| good
2026-01-24T05:00:00.000Z	27 \| good	5.06 \| good	21.744 \| good	27.208 \| good	0.762 \| good	6.016 \| good	0.171 \| good
2026-01-24T06:00:00.000Z	27 \| good	4.806 \| good	20.98 \| good	26.372 \| good	0.719 \| good	5.468 \| good	0.166 \| good
2026-01-24T07:00:00.000Z	27 \| good	4.53 \| good	19.848 \| good	21.909 \| good	0.665 \| good	4.879 \| good	0.161 \| good
2026-01-24T08:00:00.000Z	27 \| good	4.522 \| good	19.681 \| good	22.688 \| good	0.61 \| good	4.29 \| good	0.157 \| good
2026-01-24T09:00:00.000Z	27 \| good	4.712 \| good	20.416 \| good	22.433 \| good	0.555 \| good	3.701 \| good	0.152 \| good
2026-01-24T10:00:00.000Z	27 \| good	5.13 \| good	22.223 \| good	22.51 \| good	0.587 \| good	3.698 \| good	0.151 \| good
2026-01-24T11:00:00.000Z	33 \| good	5.831 \| good	25.808 \| good	22.079 \| good	0.618 \| good	3.695 \| good	0.15 \| good
2026-01-24T12:00:00.000Z	33 \| good	6.25 \| good	27.789 \| good	19.962 \| good	0.65 \| good	3.693 \| good	0.149 \| good
2026-01-24T13:00:00.000Z	33 \| good	5.569 \| good	23.873 \| good	17.972 \| good	0.715 \| good	4.485 \| good	0.154 \| good
2026-01-24T14:00:00.000Z	33 \| good	5.986 \| good	26.671 \| good	16.899 \| good	0.781 \| good	5.278 \| good	0.16 \| good
2026-01-24T15:00:00.000Z	38 \| good	6.646 \| good	29.825 \| good	18.601 \| good	0.846 \| good	6.071 \| good	0.165 \| good
2026-01-24T16:00:00.000Z	38 \| good	6.912 \| good	30.497 \| good	22.171 \| good	0.887 \| good	5.245 \| good	0.165 \| good
2026-01-24T17:00:00.000Z	38 \| good	7.09 \| good	31.47 \| good	26.622 \| good	0.928 \| good	4.42 \| good	0.165 \| good
2026-01-24T18:00:00.000Z	33 \| good	6.285 \| good	28.103 \| good	31.649 \| good	0.969 \| good	3.595 \| good	0.164 \| good
2026-01-24T19:00:00.000Z	38 \| good	6.675 \| good	29.948 \| good	32.714 \| good	0.959 \| good	3.351 \| good	0.163 \| good
2026-01-24T20:00:00.000Z	38 \| good	6.625 \| good	29.751 \| good	32.506 \| good	0.949 \| good	3.107 \| good	0.161 \| good
2026-01-24T21:00:00.000Z	38 \| good	6.998 \| good	31.011 \| good	32.069 \| good	0.939 \| good	2.863 \| good	0.159 \| good
2026-01-24T22:00:00.000Z	38 \| good	6.583 \| good	29.29 \| good	33.469 \| good	0.914 \| good	3.949 \| good	0.162 \| good
2026-01-24T23:00:00.000Z	38 \| good	7.378 \| good	32.435 \| good	33.665 \| good	0.888 \| good	5.035 \| good	0.164 \| good
2026-01-25T00:00:00.000Z	28 \| good	5.313 \| good	5.416 \| good	29.973 \| good	0.857 \| good	6.041 \| good	0.165 \| good
2026-01-25T01:00:00.000Z	27 \| good	5.382 \| good	23.332 \| good	20.704 \| good	0.872 \| good	7.297 \| good	0.172 \| good
2026-01-25T02:00:00.000Z	33 \| good	6.123 \| good	26.713 \| good	21.77 \| good	0.88 \| good	8.473 \| good	0.178 \| good
2026-01-25T03:00:00.000Z	44 \| good	7.642 \| good	33.836 \| good	19.862 \| good	0.889 \| good	9.65 \| good	0.183 \| good
2026-01-25T04:00:00.000Z	52 \| moderate	10.201 \| good	45.093 \| good	14.691 \| good	0.894 \| good	11.125 \| good	0.19 \| good
2026-01-25T05:00:00.000Z	56 \| moderate	11.869 \| good	53.159 \| good	16.577 \| good	0.899 \| good	12.6 \| good	0.198 \| 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

Get reliable air quality data to drive your business

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

How accurate is Colorado, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

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

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

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

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?