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 0.816 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 34.901 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 15.13 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 4.378 μg/m3.

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

The PM10 concentration in Highlands Ranch, Colorado is 19.4 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)

4.67 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

28.00 μg/m³

155

255

425

605+

Ozone (O₃)

31.26 ppb

201

201+

Sulfur Dioxide (SO₂)

0.67 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

23.90 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.37 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
2026-06-06T14:00:00.000Z	41 \| good	5.201 \| good	17.448 \| good	44.328 \| good	0.639 \| good	12.865 \| good	0.191 \| good
2026-06-06T15:00:00.000Z	44 \| good	7.192 \| good	29.091 \| good	46.664 \| good	0.997 \| good	12.557 \| good	0.268 \| good
2026-06-06T16:00:00.000Z	45 \| good	7.832 \| good	31.551 \| good	49.12 \| good	1.203 \| good	11.936 \| good	0.241 \| good
2026-06-06T17:00:00.000Z	49 \| good	7.952 \| good	31.302 \| good	52.709 \| good	0.976 \| good	11.056 \| good	0.196 \| good
2026-06-06T18:00:00.000Z	61 \| moderate	5.78 \| good	24.87 \| good	57.755 \| fine	1.045 \| good	13.428 \| good	0.297 \| good
2026-06-06T19:00:00.000Z	64 \| moderate	5.296 \| good	20.279 \| good	58.997 \| fine	0.762 \| good	12.834 \| good	0.263 \| good
2026-06-06T20:00:00.000Z	64 \| moderate	5.533 \| good	25.347 \| good	58.945 \| fine	0.587 \| good	8.682 \| good	0.213 \| good
2026-06-06T21:00:00.000Z	67 \| moderate	3.384 \| good	15.837 \| good	59.614 \| fine	0.541 \| good	5.124 \| good	0.15 \| good
2026-06-06T22:00:00.000Z	71 \| moderate	3.596 \| good	19.284 \| good	61.201 \| fine	0.567 \| good	4.376 \| good	0.15 \| good
2026-06-06T23:00:00.000Z	71 \| moderate	3.477 \| good	18.287 \| good	61.431 \| fine	0.652 \| good	4.968 \| good	0.15 \| good
2026-06-07T00:00:00.000Z	64 \| moderate	2.296 \| good	10.241 \| good	58.636 \| fine	0.587 \| good	6.386 \| good	0.201 \| good
2026-06-07T01:00:00.000Z	58 \| moderate	3.398 \| good	15.034 \| good	57.013 \| fine	0.567 \| good	8.803 \| good	0.251 \| good
2026-06-07T02:00:00.000Z	58 \| moderate	3.507 \| good	17.108 \| good	57.124 \| fine	0.658 \| good	11.251 \| good	0.307 \| good
2026-06-07T03:00:00.000Z	58 \| moderate	4.036 \| good	20.893 \| good	57.387 \| fine	0.49 \| good	4.876 \| good	0.156 \| good
2026-06-07T04:00:00.000Z	58 \| moderate	4.295 \| good	31.763 \| good	56.846 \| fine	0.554 \| good	5.236 \| good	0.201 \| good
2026-06-07T05:00:00.000Z	54 \| moderate	4.959 \| good	56.016 \| fine	55.616 \| fine	0.796 \| good	7.527 \| good	0.201 \| good
2026-06-07T06:00:00.000Z	50 \| good	4.463 \| good	26.183 \| good	54.243 \| good	0.837 \| good	9.389 \| good	0.285 \| good
2026-06-07T07:00:00.000Z	49 \| good	3.858 \| good	21.326 \| good	52.917 \| good	0.554 \| good	7.902 \| good	0.234 \| good
2026-06-07T08:00:00.000Z	49 \| good	3.404 \| good	17.161 \| good	52.719 \| good	0.509 \| good	8.493 \| good	0.184 \| good
2026-06-07T09:00:00.000Z	47 \| good	2.659 \| good	9.763 \| good	51.045 \| good	0.611 \| good	9.189 \| good	0.234 \| good
2026-06-07T10:00:00.000Z	47 \| good	2.713 \| good	12.078 \| good	50.528 \| good	0.62 \| good	11.659 \| good	0.201 \| good
2026-06-07T11:00:00.000Z	46 \| good	3.698 \| good	15.014 \| good	49.671 \| good	0.625 \| good	14.978 \| good	0.15 \| good
2026-06-07T12:00:00.000Z	48 \| good	4.109 \| good	17.3 \| good	51.623 \| good	0.518 \| good	17.172 \| good	0.184 \| good
2026-06-07T13:00:00.000Z	48 \| good	3.948 \| good	15.304 \| good	51.683 \| good	0.594 \| good	14.61 \| good	0.234 \| good
2026-06-07T14:00:00.000Z	48 \| good	3.883 \| good	15.374 \| good	51.999 \| good	0.706 \| good	10.16 \| good	0.24 \| good
2026-06-07T15:00:00.000Z	48 \| good	3.729 \| good	15.174 \| good	51.66 \| good	0.65 \| good	9.034 \| good	0.201 \| good
2026-06-07T16:00:00.000Z	48 \| good	2.854 \| good	15.356 \| good	51.932 \| good	1.018 \| good	9.03 \| good	0.156 \| good
2026-06-07T17:00:00.000Z	50 \| good	2.97 \| good	18.515 \| good	53.811 \| good	0.615 \| good	3.86 \| good	0.1 \| good
2026-06-07T18:00:00.000Z	51 \| moderate	3.555 \| good	20.559 \| good	55.362 \| fine	0.577 \| good	3.485 \| good	0.1 \| good
2026-06-07T19:00:00.000Z	54 \| moderate	3.443 \| good	16.011 \| good	56.056 \| fine	0.632 \| good	4.179 \| good	0.15 \| good
2026-06-07T20:00:00.000Z	54 \| moderate	3.746 \| good	20.969 \| good	56.426 \| fine	0.587 \| good	4.077 \| good	0.15 \| good
2026-06-07T21:00:00.000Z	54 \| moderate	4.183 \| good	18.058 \| good	55.728 \| fine	0.561 \| good	4.541 \| good	0.15 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	4.207 \| good	26.963 \| good	55.04 \| fine	0.465 \| good	7.54 \| good	0.201 \| good
2026-06-07T23:00:00.000Z	50 \| good	4.002 \| good	23.453 \| good	53.657 \| good	0.566 \| good	8.853 \| good	0.256 \| good
2026-06-08T00:00:00.000Z	48 \| good	3.023 \| good	21.086 \| good	52.32 \| good	0.505 \| good	8.018 \| good	0.307 \| good
2026-06-08T01:00:00.000Z	47 \| good	3.504 \| good	19.702 \| good	51.453 \| good	0.475 \| good	12.439 \| good	0.29 \| good
2026-06-08T02:00:00.000Z	45 \| good	3.66 \| good	27.499 \| good	48.758 \| good	0.591 \| good	11.27 \| good	0.24 \| good
2026-06-08T03:00:00.000Z	88 \| moderate	28.807 \| fine	125.291 \| fine	46.504 \| good	0.246 \| good	11.43 \| good	0.165 \| good
2026-06-08T04:00:00.000Z	42 \| good	4.026 \| good	17.883 \| good	44.784 \| good	0.687 \| good	22.355 \| good	0.425 \| good
2026-06-08T05:00:00.000Z	40 \| good	4.336 \| good	19.136 \| good	43.126 \| good	0.67 \| good	24.813 \| good	0.408 \| good
2026-06-08T06:00:00.000Z	37 \| good	3.888 \| good	21.521 \| good	40.173 \| good	0.639 \| good	19.569 \| good	0.449 \| good
2026-06-08T07:00:00.000Z	34 \| good	3.902 \| good	34.478 \| good	36.663 \| good	0.66 \| good	24.012 \| good	0.414 \| good
2026-06-08T08:00:00.000Z	62 \| moderate	4.303 \| good	77.699 \| fine	34.239 \| good	0.66 \| good	27.67 \| good	0.327 \| good
2026-06-08T09:00:00.000Z	32 \| good	4.191 \| good	26.525 \| good	35.035 \| good	0.69 \| good	23.147 \| good	0.275 \| good
2026-06-08T10:00:00.000Z	32 \| good	4.122 \| good	20.259 \| good	34.854 \| good	1.103 \| good	15.541 \| good	0.239 \| good
2026-06-08T11:00:00.000Z	31 \| good	4.445 \| good	19.824 \| good	34.115 \| good	0.83 \| good	16.09 \| good	0.201 \| good
2026-06-08T12:00:00.000Z	32 \| good	4.143 \| good	19.771 \| good	34.806 \| good	0.656 \| good	15.517 \| good	0.351 \| good
2026-06-08T13:00:00.000Z	30 \| good	4.759 \| good	27.082 \| good	31.97 \| good	0.686 \| good	24.752 \| good	0.391 \| good
2026-06-08T13:00:00.000Z	29 \| good	4.671 \| good	28.002 \| good	31.259 \| good	0.674 \| good	23.9 \| good	0.37 \| good
2026-06-08T13:00:00.000Z	54 \| moderate	11.255 \| good	49.69 \| good	31.986 \| good	0.135 \| good	5.325 \| good	0.13 \| good
2026-06-08T14:00:00.000Z	52 \| moderate	10.022 \| good	44.382 \| good	36.245 \| good	0.184 \| good	3.681 \| good	0.121 \| good
2026-06-08T15:00:00.000Z	44 \| good	7.818 \| good	34.517 \| good	44.204 \| good	0.291 \| good	2.21 \| good	0.111 \| good
2026-06-08T16:00:00.000Z	48 \| good	6.933 \| good	30.493 \| good	52.048 \| good	0.304 \| good	1.581 \| good	0.11 \| good
2026-06-08T17:00:00.000Z	64 \| moderate	4.615 \| good	20.316 \| good	58.794 \| fine	0.283 \| good	1.131 \| good	0.108 \| good
2026-06-08T18:00:00.000Z	58 \| moderate	1.61 \| good	6.541 \| good	57.341 \| fine	0.25 \| good	0.781 \| good	0.106 \| good
2026-06-08T19:00:00.000Z	49 \| good	1.137 \| good	4.384 \| good	53.072 \| good	0.206 \| good	0.639 \| good	0.104 \| good
2026-06-08T20:00:00.000Z	48 \| good	2.477 \| good	10.186 \| good	52.075 \| good	0.174 \| good	0.555 \| good	0.102 \| good
2026-06-08T21:00:00.000Z	50 \| good	3.082 \| good	12.889 \| good	54.317 \| good	0.162 \| good	0.643 \| good	0.102 \| good
2026-06-08T22:00:00.000Z	64 \| moderate	6.231 \| good	27.746 \| good	58.755 \| fine	0.181 \| good	0.793 \| good	0.102 \| good
2026-06-08T23:00:00.000Z	71 \| moderate	6.532 \| good	29.228 \| good	60.78 \| fine	0.213 \| good	0.975 \| good	0.104 \| good
2026-06-09T00:00:00.000Z	71 \| moderate	6.416 \| good	28.633 \| good	60.509 \| fine	0.236 \| good	1.278 \| good	0.105 \| good
2026-06-09T01:00:00.000Z	58 \| moderate	5.783 \| good	25.25 \| good	56.996 \| fine	0.259 \| good	1.952 \| good	0.111 \| good
2026-06-09T02:00:00.000Z	51 \| moderate	5.449 \| good	23.758 \| good	55.368 \| fine	0.273 \| good	2.723 \| good	0.115 \| good
2026-06-09T03:00:00.000Z	44 \| good	3.811 \| good	16.805 \| good	48.416 \| good	0.258 \| good	4.676 \| good	0.127 \| good
2026-06-09T04:00:00.000Z	45 \| good	4.894 \| good	21.146 \| good	48.516 \| good	0.241 \| good	4.487 \| good	0.125 \| good
2026-06-09T05:00:00.000Z	52 \| moderate	9.629 \| good	42.479 \| good	45.706 \| good	0.237 \| good	5.283 \| good	0.131 \| good
2026-06-09T06:00:00.000Z	69 \| moderate	18.885 \| fine	83.351 \| fine	50.232 \| good	0.234 \| good	6.037 \| good	0.138 \| good
2026-06-09T07:00:00.000Z	71 \| moderate	20.153 \| fine	88.003 \| fine	47.202 \| good	0.217 \| good	5.746 \| good	0.139 \| good
2026-06-09T08:00:00.000Z	67 \| moderate	17.616 \| fine	77.359 \| fine	47.979 \| good	0.205 \| good	5.036 \| good	0.135 \| good
2026-06-09T09:00:00.000Z	66 \| moderate	17.046 \| fine	75.876 \| fine	45.94 \| good	0.197 \| good	4.72 \| good	0.132 \| good
2026-06-09T10:00:00.000Z	56 \| moderate	11.876 \| good	52.505 \| good	39.635 \| good	0.189 \| good	4.8 \| good	0.13 \| good
2026-06-09T11:00:00.000Z	49 \| good	9.176 \| good	40.142 \| good	36.31 \| good	0.181 \| good	4.866 \| good	0.129 \| good
2026-06-09T12:00:00.000Z	34 \| good	6.299 \| good	27.542 \| good	36.562 \| good	0.171 \| good	4.485 \| good	0.126 \| good
2026-06-09T13:00:00.000Z	33 \| good	5.559 \| good	24.099 \| good	34.02 \| good	0.161 \| good	3.359 \| good	0.123 \| good
2026-06-09T14:00:00.000Z	33 \| good	6.375 \| good	28.427 \| good	34.315 \| good	0.172 \| good	3.139 \| good	0.125 \| good
2026-06-09T15:00:00.000Z	42 \| good	5.304 \| good	23.18 \| good	45.283 \| good	0.215 \| good	2.02 \| good	0.109 \| good
2026-06-09T16:00:00.000Z	61 \| moderate	3.492 \| good	15.208 \| good	57.66 \| fine	0.192 \| good	0.859 \| good	0.094 \| good
2026-06-09T17:00:00.000Z	74 \| moderate	2.86 \| good	11.731 \| good	62.481 \| fine	0.158 \| good	0.44 \| good	0.088 \| good
2026-06-09T18:00:00.000Z	71 \| moderate	5.14 \| good	22.38 \| good	60.791 \| fine	0.147 \| good	0.34 \| good	0.087 \| good
2026-06-09T19:00:00.000Z	71 \| moderate	7.947 \| good	35.097 \| good	60.617 \| fine	0.147 \| good	0.296 \| good	0.087 \| good
2026-06-09T20:00:00.000Z	67 \| moderate	8.191 \| good	36.119 \| good	59.992 \| fine	0.154 \| good	0.284 \| good	0.089 \| good
2026-06-09T21:00:00.000Z	67 \| moderate	17.532 \| fine	78.015 \| fine	58.535 \| fine	0.157 \| good	0.295 \| good	0.09 \| good
2026-06-09T22:00:00.000Z	77 \| moderate	22.82 \| fine	99.928 \| fine	57.398 \| fine	0.154 \| good	0.303 \| good	0.091 \| good
2026-06-09T23:00:00.000Z	75 \| moderate	21.825 \| fine	95.949 \| fine	58.759 \| fine	0.14 \| good	0.33 \| good	0.091 \| good
2026-06-10T00:00:00.000Z	79 \| moderate	24.163 \| fine	105.131 \| fine	55.914 \| fine	0.112 \| good	0.398 \| good	0.09 \| good
2026-06-10T01:00:00.000Z	153 \| unhealthy	59.411 \| poor	258.712 \| poor	55.133 \| fine	0.085 \| good	0.607 \| good	0.091 \| good
2026-06-10T02:00:00.000Z	110 \| sensitive	38.698 \| moderate	170.278 \| moderate	48.384 \| good	0.083 \| good	1.57 \| good	0.097 \| good
2026-06-10T03:00:00.000Z	88 \| moderate	29.271 \| fine	126.76 \| fine	46.851 \| good	0.107 \| good	4.445 \| good	0.114 \| good
2026-06-10T04:00:00.000Z	77 \| moderate	22.737 \| fine	99.643 \| fine	50.162 \| good	0.134 \| good	7.271 \| good	0.132 \| good
2026-06-10T05:00:00.000Z	77 \| moderate	22.964 \| fine	100.928 \| fine	43.207 \| good	0.148 \| good	9.3 \| good	0.145 \| good
2026-06-10T06:00:00.000Z	44 \| good	7.916 \| good	9.29 \| good	23.813 \| good	0.148 \| good	10.589 \| good	0.156 \| good
2026-06-10T07:00:00.000Z	97 \| moderate	33.74 \| fine	146.446 \| fine	38.341 \| good	0.136 \| good	9.909 \| good	0.156 \| good
2026-06-10T08:00:00.000Z	82 \| moderate	26.344 \| fine	114.975 \| fine	35.113 \| good	0.127 \| good	9.072 \| good	0.152 \| good
2026-06-10T09:00:00.000Z	69 \| moderate	19.456 \| fine	85.12 \| fine	32.477 \| good	0.12 \| good	7.993 \| good	0.143 \| good
2026-06-10T10:00:00.000Z	75 \| moderate	21.669 \| fine	95.216 \| fine	30.452 \| good	0.119 \| good	7.259 \| good	0.137 \| good
2026-06-10T11:00:00.000Z	96 \| moderate	32.75 \| fine	143.882 \| fine	24.8 \| good	0.119 \| good	7.129 \| good	0.135 \| good
2026-06-10T12:00:00.000Z	33 \| good	5.926 \| good	8.512 \| good	23.669 \| good	0.126 \| good	5.848 \| good	0.129 \| good

Highlands Ranch

Get reliable air quality data to drive your business

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

0.20ppm

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 2026-06-08.

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 11:00:00 on 2026-06-08.

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

As of now, the AQI in Highlands Ranch, Colorado is 32, 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 4.378 μg/m³.

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

The PM₁₀ concentration in Highlands Ranch, Colorado is 19.4 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 0.192 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 0.816 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 34.901 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 15.13 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-06T14:00:00.000Z	41 \| good	5.201 \| good	17.448 \| good	44.328 \| good	0.639 \| good	12.865 \| good	0.191 \| good
2026-06-06T15:00:00.000Z	44 \| good	7.192 \| good	29.091 \| good	46.664 \| good	0.997 \| good	12.557 \| good	0.268 \| good
2026-06-06T16:00:00.000Z	45 \| good	7.832 \| good	31.551 \| good	49.12 \| good	1.203 \| good	11.936 \| good	0.241 \| good
2026-06-06T17:00:00.000Z	49 \| good	7.952 \| good	31.302 \| good	52.709 \| good	0.976 \| good	11.056 \| good	0.196 \| good
2026-06-06T18:00:00.000Z	61 \| moderate	5.78 \| good	24.87 \| good	57.755 \| fine	1.045 \| good	13.428 \| good	0.297 \| good
2026-06-06T19:00:00.000Z	64 \| moderate	5.296 \| good	20.279 \| good	58.997 \| fine	0.762 \| good	12.834 \| good	0.263 \| good
2026-06-06T20:00:00.000Z	64 \| moderate	5.533 \| good	25.347 \| good	58.945 \| fine	0.587 \| good	8.682 \| good	0.213 \| good
2026-06-06T21:00:00.000Z	67 \| moderate	3.384 \| good	15.837 \| good	59.614 \| fine	0.541 \| good	5.124 \| good	0.15 \| good
2026-06-06T22:00:00.000Z	71 \| moderate	3.596 \| good	19.284 \| good	61.201 \| fine	0.567 \| good	4.376 \| good	0.15 \| good
2026-06-06T23:00:00.000Z	71 \| moderate	3.477 \| good	18.287 \| good	61.431 \| fine	0.652 \| good	4.968 \| good	0.15 \| good
2026-06-07T00:00:00.000Z	64 \| moderate	2.296 \| good	10.241 \| good	58.636 \| fine	0.587 \| good	6.386 \| good	0.201 \| good
2026-06-07T01:00:00.000Z	58 \| moderate	3.398 \| good	15.034 \| good	57.013 \| fine	0.567 \| good	8.803 \| good	0.251 \| good
2026-06-07T02:00:00.000Z	58 \| moderate	3.507 \| good	17.108 \| good	57.124 \| fine	0.658 \| good	11.251 \| good	0.307 \| good
2026-06-07T03:00:00.000Z	58 \| moderate	4.036 \| good	20.893 \| good	57.387 \| fine	0.49 \| good	4.876 \| good	0.156 \| good
2026-06-07T04:00:00.000Z	58 \| moderate	4.295 \| good	31.763 \| good	56.846 \| fine	0.554 \| good	5.236 \| good	0.201 \| good
2026-06-07T05:00:00.000Z	54 \| moderate	4.959 \| good	56.016 \| fine	55.616 \| fine	0.796 \| good	7.527 \| good	0.201 \| good
2026-06-07T06:00:00.000Z	50 \| good	4.463 \| good	26.183 \| good	54.243 \| good	0.837 \| good	9.389 \| good	0.285 \| good
2026-06-07T07:00:00.000Z	49 \| good	3.858 \| good	21.326 \| good	52.917 \| good	0.554 \| good	7.902 \| good	0.234 \| good
2026-06-07T08:00:00.000Z	49 \| good	3.404 \| good	17.161 \| good	52.719 \| good	0.509 \| good	8.493 \| good	0.184 \| good
2026-06-07T09:00:00.000Z	47 \| good	2.659 \| good	9.763 \| good	51.045 \| good	0.611 \| good	9.189 \| good	0.234 \| good
2026-06-07T10:00:00.000Z	47 \| good	2.713 \| good	12.078 \| good	50.528 \| good	0.62 \| good	11.659 \| good	0.201 \| good
2026-06-07T11:00:00.000Z	46 \| good	3.698 \| good	15.014 \| good	49.671 \| good	0.625 \| good	14.978 \| good	0.15 \| good
2026-06-07T12:00:00.000Z	48 \| good	4.109 \| good	17.3 \| good	51.623 \| good	0.518 \| good	17.172 \| good	0.184 \| good
2026-06-07T13:00:00.000Z	48 \| good	3.948 \| good	15.304 \| good	51.683 \| good	0.594 \| good	14.61 \| good	0.234 \| good
2026-06-07T14:00:00.000Z	48 \| good	3.883 \| good	15.374 \| good	51.999 \| good	0.706 \| good	10.16 \| good	0.24 \| good
2026-06-07T15:00:00.000Z	48 \| good	3.729 \| good	15.174 \| good	51.66 \| good	0.65 \| good	9.034 \| good	0.201 \| good
2026-06-07T16:00:00.000Z	48 \| good	2.854 \| good	15.356 \| good	51.932 \| good	1.018 \| good	9.03 \| good	0.156 \| good
2026-06-07T17:00:00.000Z	50 \| good	2.97 \| good	18.515 \| good	53.811 \| good	0.615 \| good	3.86 \| good	0.1 \| good
2026-06-07T18:00:00.000Z	51 \| moderate	3.555 \| good	20.559 \| good	55.362 \| fine	0.577 \| good	3.485 \| good	0.1 \| good
2026-06-07T19:00:00.000Z	54 \| moderate	3.443 \| good	16.011 \| good	56.056 \| fine	0.632 \| good	4.179 \| good	0.15 \| good
2026-06-07T20:00:00.000Z	54 \| moderate	3.746 \| good	20.969 \| good	56.426 \| fine	0.587 \| good	4.077 \| good	0.15 \| good
2026-06-07T21:00:00.000Z	54 \| moderate	4.183 \| good	18.058 \| good	55.728 \| fine	0.561 \| good	4.541 \| good	0.15 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	4.207 \| good	26.963 \| good	55.04 \| fine	0.465 \| good	7.54 \| good	0.201 \| good
2026-06-07T23:00:00.000Z	50 \| good	4.002 \| good	23.453 \| good	53.657 \| good	0.566 \| good	8.853 \| good	0.256 \| good
2026-06-08T00:00:00.000Z	48 \| good	3.023 \| good	21.086 \| good	52.32 \| good	0.505 \| good	8.018 \| good	0.307 \| good
2026-06-08T01:00:00.000Z	47 \| good	3.504 \| good	19.702 \| good	51.453 \| good	0.475 \| good	12.439 \| good	0.29 \| good
2026-06-08T02:00:00.000Z	45 \| good	3.66 \| good	27.499 \| good	48.758 \| good	0.591 \| good	11.27 \| good	0.24 \| good
2026-06-08T03:00:00.000Z	88 \| moderate	28.807 \| fine	125.291 \| fine	46.504 \| good	0.246 \| good	11.43 \| good	0.165 \| good
2026-06-08T04:00:00.000Z	42 \| good	4.026 \| good	17.883 \| good	44.784 \| good	0.687 \| good	22.355 \| good	0.425 \| good
2026-06-08T05:00:00.000Z	40 \| good	4.336 \| good	19.136 \| good	43.126 \| good	0.67 \| good	24.813 \| good	0.408 \| good
2026-06-08T06:00:00.000Z	37 \| good	3.888 \| good	21.521 \| good	40.173 \| good	0.639 \| good	19.569 \| good	0.449 \| good
2026-06-08T07:00:00.000Z	34 \| good	3.902 \| good	34.478 \| good	36.663 \| good	0.66 \| good	24.012 \| good	0.414 \| good
2026-06-08T08:00:00.000Z	62 \| moderate	4.303 \| good	77.699 \| fine	34.239 \| good	0.66 \| good	27.67 \| good	0.327 \| good
2026-06-08T09:00:00.000Z	32 \| good	4.191 \| good	26.525 \| good	35.035 \| good	0.69 \| good	23.147 \| good	0.275 \| good
2026-06-08T10:00:00.000Z	32 \| good	4.122 \| good	20.259 \| good	34.854 \| good	1.103 \| good	15.541 \| good	0.239 \| good
2026-06-08T11:00:00.000Z	31 \| good	4.445 \| good	19.824 \| good	34.115 \| good	0.83 \| good	16.09 \| good	0.201 \| good
2026-06-08T12:00:00.000Z	32 \| good	4.143 \| good	19.771 \| good	34.806 \| good	0.656 \| good	15.517 \| good	0.351 \| good
2026-06-08T13:00:00.000Z	30 \| good	4.759 \| good	27.082 \| good	31.97 \| good	0.686 \| good	24.752 \| good	0.391 \| good
2026-06-08T13:00:00.000Z	29 \| good	4.671 \| good	28.002 \| good	31.259 \| good	0.674 \| good	23.9 \| good	0.37 \| good
2026-06-08T13:00:00.000Z	54 \| moderate	11.255 \| good	49.69 \| good	31.986 \| good	0.135 \| good	5.325 \| good	0.13 \| good
2026-06-08T14:00:00.000Z	52 \| moderate	10.022 \| good	44.382 \| good	36.245 \| good	0.184 \| good	3.681 \| good	0.121 \| good
2026-06-08T15:00:00.000Z	44 \| good	7.818 \| good	34.517 \| good	44.204 \| good	0.291 \| good	2.21 \| good	0.111 \| good
2026-06-08T16:00:00.000Z	48 \| good	6.933 \| good	30.493 \| good	52.048 \| good	0.304 \| good	1.581 \| good	0.11 \| good
2026-06-08T17:00:00.000Z	64 \| moderate	4.615 \| good	20.316 \| good	58.794 \| fine	0.283 \| good	1.131 \| good	0.108 \| good
2026-06-08T18:00:00.000Z	58 \| moderate	1.61 \| good	6.541 \| good	57.341 \| fine	0.25 \| good	0.781 \| good	0.106 \| good
2026-06-08T19:00:00.000Z	49 \| good	1.137 \| good	4.384 \| good	53.072 \| good	0.206 \| good	0.639 \| good	0.104 \| good
2026-06-08T20:00:00.000Z	48 \| good	2.477 \| good	10.186 \| good	52.075 \| good	0.174 \| good	0.555 \| good	0.102 \| good
2026-06-08T21:00:00.000Z	50 \| good	3.082 \| good	12.889 \| good	54.317 \| good	0.162 \| good	0.643 \| good	0.102 \| good
2026-06-08T22:00:00.000Z	64 \| moderate	6.231 \| good	27.746 \| good	58.755 \| fine	0.181 \| good	0.793 \| good	0.102 \| good
2026-06-08T23:00:00.000Z	71 \| moderate	6.532 \| good	29.228 \| good	60.78 \| fine	0.213 \| good	0.975 \| good	0.104 \| good
2026-06-09T00:00:00.000Z	71 \| moderate	6.416 \| good	28.633 \| good	60.509 \| fine	0.236 \| good	1.278 \| good	0.105 \| good
2026-06-09T01:00:00.000Z	58 \| moderate	5.783 \| good	25.25 \| good	56.996 \| fine	0.259 \| good	1.952 \| good	0.111 \| good
2026-06-09T02:00:00.000Z	51 \| moderate	5.449 \| good	23.758 \| good	55.368 \| fine	0.273 \| good	2.723 \| good	0.115 \| good
2026-06-09T03:00:00.000Z	44 \| good	3.811 \| good	16.805 \| good	48.416 \| good	0.258 \| good	4.676 \| good	0.127 \| good
2026-06-09T04:00:00.000Z	45 \| good	4.894 \| good	21.146 \| good	48.516 \| good	0.241 \| good	4.487 \| good	0.125 \| good
2026-06-09T05:00:00.000Z	52 \| moderate	9.629 \| good	42.479 \| good	45.706 \| good	0.237 \| good	5.283 \| good	0.131 \| good
2026-06-09T06:00:00.000Z	69 \| moderate	18.885 \| fine	83.351 \| fine	50.232 \| good	0.234 \| good	6.037 \| good	0.138 \| good
2026-06-09T07:00:00.000Z	71 \| moderate	20.153 \| fine	88.003 \| fine	47.202 \| good	0.217 \| good	5.746 \| good	0.139 \| good
2026-06-09T08:00:00.000Z	67 \| moderate	17.616 \| fine	77.359 \| fine	47.979 \| good	0.205 \| good	5.036 \| good	0.135 \| good
2026-06-09T09:00:00.000Z	66 \| moderate	17.046 \| fine	75.876 \| fine	45.94 \| good	0.197 \| good	4.72 \| good	0.132 \| good
2026-06-09T10:00:00.000Z	56 \| moderate	11.876 \| good	52.505 \| good	39.635 \| good	0.189 \| good	4.8 \| good	0.13 \| good
2026-06-09T11:00:00.000Z	49 \| good	9.176 \| good	40.142 \| good	36.31 \| good	0.181 \| good	4.866 \| good	0.129 \| good
2026-06-09T12:00:00.000Z	34 \| good	6.299 \| good	27.542 \| good	36.562 \| good	0.171 \| good	4.485 \| good	0.126 \| good
2026-06-09T13:00:00.000Z	33 \| good	5.559 \| good	24.099 \| good	34.02 \| good	0.161 \| good	3.359 \| good	0.123 \| good
2026-06-09T14:00:00.000Z	33 \| good	6.375 \| good	28.427 \| good	34.315 \| good	0.172 \| good	3.139 \| good	0.125 \| good
2026-06-09T15:00:00.000Z	42 \| good	5.304 \| good	23.18 \| good	45.283 \| good	0.215 \| good	2.02 \| good	0.109 \| good
2026-06-09T16:00:00.000Z	61 \| moderate	3.492 \| good	15.208 \| good	57.66 \| fine	0.192 \| good	0.859 \| good	0.094 \| good
2026-06-09T17:00:00.000Z	74 \| moderate	2.86 \| good	11.731 \| good	62.481 \| fine	0.158 \| good	0.44 \| good	0.088 \| good
2026-06-09T18:00:00.000Z	71 \| moderate	5.14 \| good	22.38 \| good	60.791 \| fine	0.147 \| good	0.34 \| good	0.087 \| good
2026-06-09T19:00:00.000Z	71 \| moderate	7.947 \| good	35.097 \| good	60.617 \| fine	0.147 \| good	0.296 \| good	0.087 \| good
2026-06-09T20:00:00.000Z	67 \| moderate	8.191 \| good	36.119 \| good	59.992 \| fine	0.154 \| good	0.284 \| good	0.089 \| good
2026-06-09T21:00:00.000Z	67 \| moderate	17.532 \| fine	78.015 \| fine	58.535 \| fine	0.157 \| good	0.295 \| good	0.09 \| good
2026-06-09T22:00:00.000Z	77 \| moderate	22.82 \| fine	99.928 \| fine	57.398 \| fine	0.154 \| good	0.303 \| good	0.091 \| good
2026-06-09T23:00:00.000Z	75 \| moderate	21.825 \| fine	95.949 \| fine	58.759 \| fine	0.14 \| good	0.33 \| good	0.091 \| good
2026-06-10T00:00:00.000Z	79 \| moderate	24.163 \| fine	105.131 \| fine	55.914 \| fine	0.112 \| good	0.398 \| good	0.09 \| good
2026-06-10T01:00:00.000Z	153 \| unhealthy	59.411 \| poor	258.712 \| poor	55.133 \| fine	0.085 \| good	0.607 \| good	0.091 \| good
2026-06-10T02:00:00.000Z	110 \| sensitive	38.698 \| moderate	170.278 \| moderate	48.384 \| good	0.083 \| good	1.57 \| good	0.097 \| good
2026-06-10T03:00:00.000Z	88 \| moderate	29.271 \| fine	126.76 \| fine	46.851 \| good	0.107 \| good	4.445 \| good	0.114 \| good
2026-06-10T04:00:00.000Z	77 \| moderate	22.737 \| fine	99.643 \| fine	50.162 \| good	0.134 \| good	7.271 \| good	0.132 \| good
2026-06-10T05:00:00.000Z	77 \| moderate	22.964 \| fine	100.928 \| fine	43.207 \| good	0.148 \| good	9.3 \| good	0.145 \| good
2026-06-10T06:00:00.000Z	44 \| good	7.916 \| good	9.29 \| good	23.813 \| good	0.148 \| good	10.589 \| good	0.156 \| good
2026-06-10T07:00:00.000Z	97 \| moderate	33.74 \| fine	146.446 \| fine	38.341 \| good	0.136 \| good	9.909 \| good	0.156 \| good
2026-06-10T08:00:00.000Z	82 \| moderate	26.344 \| fine	114.975 \| fine	35.113 \| good	0.127 \| good	9.072 \| good	0.152 \| good
2026-06-10T09:00:00.000Z	69 \| moderate	19.456 \| fine	85.12 \| fine	32.477 \| good	0.12 \| good	7.993 \| good	0.143 \| good
2026-06-10T10:00:00.000Z	75 \| moderate	21.669 \| fine	95.216 \| fine	30.452 \| good	0.119 \| good	7.259 \| good	0.137 \| good
2026-06-10T11:00:00.000Z	96 \| moderate	32.75 \| fine	143.882 \| fine	24.8 \| good	0.119 \| good	7.129 \| good	0.135 \| good
2026-06-10T12:00:00.000Z	33 \| good	5.926 \| good	8.512 \| good	23.669 \| good	0.126 \| good	5.848 \| good	0.129 \| 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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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?