What are the current PM10 levels at Castle Rock, Colorado?

The current PM10 levels in Castle Rock, Colorado are 46.286 μg/m3.

What are the current sulfur dioxide (SO2) levels at Castle Rock, Colorado?

The current sulfur dioxide (SO2) levels in Castle Rock, Colorado are 0.427 ppb.

What are the current ozone (O3) levels at Castle Rock, Colorado?

The current ozone (O3) levels at Castle Rock, Colorado is 36.932 ppm.

What are the current nitrogen dioxide (NO2) levels at Castle Rock, Colorado?

The current nitrogen dioxide (NO2) levels at Castle Rock, Colorado is 16.337 ppb.

Real-time air quality index in Castle Rock, Colorado today

Q: What are the current PM2.5 levels in Castle Rock, Colorado?

The measured PM2.5 levels in Castle Rock, Colorado at present are 7.671 μg/m3.

Stay updated with real-time air quality in Castle Rock, 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

Castle Rock, Colorado

Last updated: ... (Local time)

Common air pollutants in Castle Rock, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.41 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.79 μg/m³

155

255

425

605+

Ozone (O₃)

34.63 ppb

201

201+

Sulfur Dioxide (SO₂)

0.50 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

16.28 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.32 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Castle Rock, Colorado

Get Live Pollen Counts

Castle Rock, Colorado

Scroll To Air Quality Map

Track live Castle Rock, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T09:00:00.000Z	37 \| good	3.367 \| good	12.635 \| good	39.501 \| good	0.597 \| good	8.174 \| good	0.348 \| good
2025-10-23T10:00:00.000Z	35 \| good	4.343 \| good	8.295 \| good	37.663 \| good	0.551 \| good	6.838 \| good	0.38 \| good
2025-10-23T11:00:00.000Z	34 \| good	3.15 \| good	11.759 \| good	37.421 \| good	0.488 \| good	10.944 \| good	0.414 \| good
2025-10-23T12:00:00.000Z	31 \| good	3.419 \| good	16.144 \| good	33.308 \| good	0.812 \| good	16.796 \| good	0.475 \| good
2025-10-23T13:00:00.000Z	34 \| good	3.57 \| good	25.637 \| good	36.81 \| good	1.116 \| good	17.398 \| good	0.607 \| good
2025-10-23T14:00:00.000Z	31 \| good	3.013 \| good	16.216 \| good	34.226 \| good	1.6 \| good	16.664 \| good	0.852 \| good
2025-10-23T15:00:00.000Z	31 \| good	4.425 \| good	19.346 \| good	32.536 \| good	1.689 \| good	21.132 \| good	0.849 \| good
2025-10-23T16:00:00.000Z	34 \| good	5.674 \| good	36.959 \| good	32.398 \| good	1.682 \| good	22.189 \| good	0.644 \| good
2025-10-23T17:00:00.000Z	31 \| good	4.813 \| good	31.643 \| good	33.79 \| good	1.647 \| good	23.447 \| good	0.473 \| good
2025-10-23T18:00:00.000Z	37 \| good	4.03 \| good	39.98 \| good	37.544 \| good	1.677 \| good	30.285 \| good	0.503 \| good
2025-10-23T19:00:00.000Z	35 \| good	3.802 \| good	31.261 \| good	37.947 \| good	1.44 \| good	24.549 \| good	0.374 \| good
2025-10-23T20:00:00.000Z	39 \| good	5.696 \| good	30.579 \| good	42.023 \| good	1.234 \| good	16.4 \| good	0.273 \| good
2025-10-23T21:00:00.000Z	40 \| good	5.877 \| good	32.426 \| good	43.07 \| good	0.824 \| good	12.246 \| good	0.279 \| good
2025-10-23T22:00:00.000Z	39 \| good	6.583 \| good	20.285 \| good	42.053 \| good	0.57 \| good	7.394 \| good	0.213 \| good
2025-10-23T23:00:00.000Z	39 \| good	3.991 \| good	30.176 \| good	42.177 \| good	0.568 \| good	7.081 \| good	0.216 \| good
2025-10-24T00:00:00.000Z	39 \| good	5.177 \| good	23.929 \| good	42.2 \| good	0.505 \| good	11.745 \| good	0.343 \| good
2025-10-24T01:00:00.000Z	38 \| good	6.953 \| good	40.595 \| good	35.573 \| good	0.508 \| good	11.473 \| good	0.411 \| good
2025-10-24T02:00:00.000Z	56 \| moderate	10.027 \| good	64.605 \| fine	37.727 \| good	0.556 \| good	10.552 \| good	0.362 \| good
2025-10-24T03:00:00.000Z	31 \| good	4.859 \| good	20.829 \| good	32.686 \| good	0.803 \| good	11.901 \| good	0.191 \| good
2025-10-24T04:00:00.000Z	44 \| good	7.781 \| good	27.611 \| good	39.119 \| good	0.577 \| good	17.629 \| good	0.296 \| good
2025-10-24T05:00:00.000Z	44 \| good	7.938 \| good	30.615 \| good	35.074 \| good	0.503 \| good	23.097 \| good	0.317 \| good
2025-10-24T06:00:00.000Z	44 \| good	7.671 \| good	46.286 \| good	36.932 \| good	0.427 \| good	16.337 \| good	0.282 \| good
2025-10-24T07:00:00.000Z	43 \| good	6.183 \| good	46.029 \| good	30.824 \| good	0.425 \| good	12.575 \| good	0.213 \| good
2025-10-24T08:00:00.000Z	33 \| good	6.048 \| good	35.793 \| good	34.051 \| good	0.433 \| good	15.22 \| good	0.213 \| good
2025-10-24T09:00:00.000Z	38 \| good	7 \| good	31.832 \| good	32.306 \| good	0.41 \| good	10.767 \| good	0.166 \| good
2025-10-24T10:00:00.000Z	33 \| good	6.075 \| good	22.782 \| good	30.859 \| good	0.349 \| good	10.654 \| good	0.166 \| good
2025-10-24T11:00:00.000Z	38 \| good	7.068 \| good	39.939 \| good	29.95 \| good	0.446 \| good	11.781 \| good	0.201 \| good
2025-10-24T12:00:00.000Z	44 \| good	7.51 \| good	24.566 \| good	27.988 \| good	0.595 \| good	22.851 \| good	0.229 \| good
2025-10-24T13:00:00.000Z	30 \| good	5.251 \| good	17.411 \| good	27.678 \| good	0.585 \| good	32.167 \| good	0.397 \| good
2025-10-24T14:00:00.000Z	40 \| good	6.718 \| good	43.19 \| good	28.006 \| good	0.859 \| good	34.496 \| good	0.555 \| good
2025-10-24T15:00:00.000Z	49 \| good	8.923 \| good	32.421 \| good	32.733 \| good	0.994 \| good	17.483 \| good	0.541 \| good
2025-10-24T16:00:00.000Z	59 \| moderate	8.637 \| good	70.521 \| fine	33.614 \| good	1.402 \| good	15.296 \| good	0.374 \| good
2025-10-24T17:00:00.000Z	45 \| good	5.876 \| good	48.677 \| good	32.506 \| good	1.207 \| good	12.823 \| good	0.213 \| good
2025-10-24T18:00:00.000Z	35 \| good	5.533 \| good	26.214 \| good	37.928 \| good	1.184 \| good	13.746 \| good	0.247 \| good
2025-10-24T19:00:00.000Z	34 \| good	5.238 \| good	18.764 \| good	37.419 \| good	1.011 \| good	13.597 \| good	0.213 \| good
2025-10-24T20:00:00.000Z	42 \| good	4.924 \| good	21.845 \| good	44.65 \| good	0.758 \| good	13.891 \| good	0.213 \| good
2025-10-24T21:00:00.000Z	43 \| good	4.383 \| good	22.569 \| good	46.313 \| good	0.629 \| good	12.161 \| good	0.178 \| good
2025-10-24T22:00:00.000Z	45 \| good	4.088 \| good	26.322 \| good	48.982 \| good	0.762 \| good	7.015 \| good	0.213 \| good
2025-10-24T23:00:00.000Z	46 \| good	4.584 \| good	21.325 \| good	49.678 \| good	0.665 \| good	5.877 \| good	0.213 \| good
2025-10-25T00:00:00.000Z	47 \| good	5.649 \| good	31.632 \| good	50.657 \| good	0.728 \| good	7.153 \| good	0.192 \| good
2025-10-25T01:00:00.000Z	43 \| good	6.494 \| good	33.961 \| good	46.366 \| good	0.598 \| good	9.591 \| good	0.371 \| good
2025-10-25T02:00:00.000Z	42 \| good	6.101 \| good	10.514 \| good	45.086 \| good	0.731 \| good	17.34 \| good	0.675 \| good
2025-10-25T03:00:00.000Z	37 \| good	1.387 \| good	5.293 \| good	40.034 \| good	0.915 \| good	16.743 \| good	0.251 \| good
2025-10-25T04:00:00.000Z	36 \| good	3.711 \| good	8.639 \| good	39.093 \| good	1.059 \| good	14.356 \| good	0.643 \| good
2025-10-25T05:00:00.000Z	36 \| good	4.32 \| good	20.538 \| good	39.218 \| good	0.801 \| good	16.902 \| good	0.651 \| good
2025-10-25T06:00:00.000Z	38 \| good	5.185 \| good	21.472 \| good	41.068 \| good	0.713 \| good	20.671 \| good	0.656 \| good
2025-10-25T07:00:00.000Z	32 \| good	4.41 \| good	14.79 \| good	34.633 \| good	0.5 \| good	16.281 \| good	0.318 \| good
2025-10-25T08:00:00.000Z	32 \| good	4.41 \| good	14.79 \| good	34.633 \| good	0.5 \| good	16.281 \| good	0.318 \| good
2025-10-24T07:00:00.000Z	30 \| good	3.969 \| good	17.186 \| good	31.698 \| good	1.165 \| good	16.293 \| good	0.206 \| good
2025-10-24T08:00:00.000Z	28 \| good	4.728 \| good	20.318 \| good	30.234 \| good	1.144 \| good	14.327 \| good	0.193 \| good
2025-10-24T09:00:00.000Z	26 \| good	4.232 \| good	18.252 \| good	28.34 \| good	1.124 \| good	12.361 \| good	0.179 \| good
2025-10-24T10:00:00.000Z	26 \| good	4.405 \| good	19.196 \| good	27.963 \| good	1.099 \| good	11.214 \| good	0.169 \| good
2025-10-24T11:00:00.000Z	27 \| good	4.642 \| good	19.99 \| good	22.11 \| good	1.074 \| good	10.067 \| good	0.159 \| good
2025-10-24T12:00:00.000Z	27 \| good	4.767 \| good	20.829 \| good	21.54 \| good	1.05 \| good	8.92 \| good	0.148 \| good
2025-10-24T13:00:00.000Z	33 \| good	5.582 \| good	24.163 \| good	21.721 \| good	1.101 \| good	10.353 \| good	0.19 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.329 \| good	23.186 \| good	26.278 \| good	1.151 \| good	11.785 \| good	0.231 \| good
2025-10-24T15:00:00.000Z	31 \| good	3.623 \| good	15.948 \| good	33.562 \| good	1.202 \| good	13.218 \| good	0.273 \| good
2025-10-24T16:00:00.000Z	32 \| good	3.835 \| good	16.706 \| good	34.55 \| good	1.12 \| good	9.706 \| good	0.227 \| good
2025-10-24T17:00:00.000Z	30 \| good	4.102 \| good	18.149 \| good	31.612 \| good	1.039 \| good	6.194 \| good	0.181 \| good
2025-10-24T18:00:00.000Z	32 \| good	3.907 \| good	17.074 \| good	34.896 \| good	0.957 \| good	2.683 \| good	0.135 \| good
2025-10-24T19:00:00.000Z	36 \| good	3.347 \| good	14.762 \| good	38.948 \| good	0.877 \| good	2.379 \| good	0.131 \| good
2025-10-24T20:00:00.000Z	41 \| good	3.145 \| good	13.658 \| good	43.566 \| good	0.796 \| good	2.074 \| good	0.128 \| good
2025-10-24T21:00:00.000Z	43 \| good	2.479 \| good	10.157 \| good	45.771 \| good	0.716 \| good	1.77 \| good	0.125 \| good
2025-10-24T22:00:00.000Z	45 \| good	2.201 \| good	9.159 \| good	48.859 \| good	0.731 \| good	3.708 \| good	0.139 \| good
2025-10-24T23:00:00.000Z	46 \| good	2.049 \| good	8.437 \| good	49.952 \| good	0.746 \| good	5.646 \| good	0.153 \| good
2025-10-25T00:00:00.000Z	40 \| good	4.683 \| good	20.619 \| good	43.479 \| good	0.761 \| good	7.584 \| good	0.166 \| good
2025-10-25T01:00:00.000Z	35 \| good	4.738 \| good	20.649 \| good	38.06 \| good	0.936 \| good	13.468 \| good	0.217 \| good
2025-10-25T02:00:00.000Z	32 \| good	4.022 \| good	17.108 \| good	35.303 \| good	1.11 \| good	19.352 \| good	0.268 \| good
2025-10-25T03:00:00.000Z	27 \| good	3.313 \| good	13.954 \| good	29.035 \| good	1.285 \| good	25.236 \| good	0.319 \| good
2025-10-25T04:00:00.000Z	30 \| good	4.349 \| good	19.079 \| good	31.823 \| good	1.15 \| good	24.121 \| good	0.324 \| good
2025-10-25T05:00:00.000Z	32 \| good	2.542 \| good	10.582 \| good	34.597 \| good	1.016 \| good	23.005 \| good	0.329 \| good
2025-10-25T06:00:00.000Z	30 \| good	1.633 \| good	6.718 \| good	32.436 \| good	0.881 \| good	21.89 \| good	0.333 \| good
2025-10-25T07:00:00.000Z	30 \| good	1.537 \| good	6.399 \| good	32.097 \| good	0.788 \| good	19.818 \| good	0.304 \| good
2025-10-25T08:00:00.000Z	31 \| good	2.945 \| good	12.459 \| good	33.387 \| good	0.695 \| good	17.746 \| good	0.275 \| good
2025-10-25T09:00:00.000Z	31 \| good	2.253 \| good	9.263 \| good	33.089 \| good	0.602 \| good	15.674 \| good	0.246 \| good
2025-10-25T10:00:00.000Z	29 \| good	2.361 \| good	9.453 \| good	31.329 \| good	0.577 \| good	14.244 \| good	0.225 \| good
2025-10-25T11:00:00.000Z	32 \| good	1.71 \| good	7.236 \| good	34.695 \| good	0.552 \| good	12.814 \| good	0.203 \| good
2025-10-25T12:00:00.000Z	31 \| good	1.664 \| good	7.154 \| good	33.427 \| good	0.527 \| good	11.384 \| good	0.182 \| good
2025-10-25T13:00:00.000Z	28 \| good	2.39 \| good	9.74 \| good	30.083 \| good	0.579 \| good	10.955 \| good	0.197 \| good
2025-10-25T14:00:00.000Z	29 \| good	2.899 \| good	11.999 \| good	31.026 \| good	0.631 \| good	10.526 \| good	0.213 \| good
2025-10-25T15:00:00.000Z	34 \| good	2.382 \| good	9.573 \| good	36.602 \| good	0.683 \| good	10.097 \| good	0.228 \| good
2025-10-25T16:00:00.000Z	38 \| good	2.301 \| good	9.542 \| good	40.891 \| good	0.699 \| good	7.502 \| good	0.19 \| good
2025-10-25T17:00:00.000Z	41 \| good	1.326 \| good	5.399 \| good	43.502 \| good	0.716 \| good	4.907 \| good	0.152 \| good
2025-10-25T18:00:00.000Z	43 \| good	0.405 \| good	1.401 \| good	45.963 \| good	0.732 \| good	2.311 \| good	0.113 \| good
2025-10-25T19:00:00.000Z	44 \| good	0.478 \| good	2 \| good	48.373 \| good	0.645 \| good	1.954 \| good	0.109 \| good
2025-10-25T20:00:00.000Z	46 \| good	0.331 \| good	1.081 \| good	50.132 \| good	0.558 \| good	1.596 \| good	0.105 \| good
2025-10-25T21:00:00.000Z	49 \| good	0.556 \| good	2.028 \| good	52.563 \| good	0.47 \| good	1.238 \| good	0.1 \| good
2025-10-25T22:00:00.000Z	46 \| good	0.524 \| good	1.972 \| good	50.239 \| good	0.505 \| good	3.013 \| good	0.114 \| good
2025-10-25T23:00:00.000Z	46 \| good	1.083 \| good	4.307 \| good	50.228 \| good	0.54 \| good	4.788 \| good	0.128 \| good
2025-10-26T00:00:00.000Z	44 \| good	1.552 \| good	6.16 \| good	46.851 \| good	0.574 \| good	6.563 \| good	0.142 \| good
2025-10-26T01:00:00.000Z	43 \| good	1.415 \| good	5.439 \| good	45.525 \| good	0.621 \| good	8.428 \| good	0.158 \| good
2025-10-26T02:00:00.000Z	38 \| good	1.493 \| good	6.298 \| good	40.91 \| good	0.668 \| good	10.293 \| good	0.174 \| good
2025-10-26T03:00:00.000Z	34 \| good	1.449 \| good	5.765 \| good	37.438 \| good	0.715 \| good	12.158 \| good	0.19 \| good
2025-10-26T04:00:00.000Z	27 \| good	1.86 \| good	7.702 \| good	29.147 \| good	0.689 \| good	11.492 \| good	0.185 \| good
2025-10-26T05:00:00.000Z	30 \| good	1.607 \| good	6.587 \| good	31.856 \| good	0.662 \| good	10.825 \| good	0.181 \| good
2025-10-26T06:00:00.000Z	27 \| good	4.695 \| good	4.961 \| good	29.323 \| good	0.644 \| good	10.34 \| good	0.177 \| good

Castle Rock

Empower business decisions with accurate air quality data

Castle Rock, Colorado air quality map: Real-time AQI near you

0.38ppm

How accurate is Colorado, USA air quality data?

Air quality measurements for Colorado, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

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 frequently is the air quality data for Castle Rock, Colorado updated?

Air quality data for Castle Rock, Colorado is updated on an hourly basis.

When did Castle Rock, Colorado experience the worst air quality in the last 24 hours?

The worst air quality in Castle Rock, Colorado was recorded at 04:00:00 on 2025-10-24.

When did Castle Rock, Colorado have its best air quality in the last 24 hours?

The best air quality in Castle Rock, Colorado was recorded at 03:00:00 on 2025-10-24.

What is the real-time air quality index for Castle Rock, Colorado?

The real-time air quality index in Castle Rock, Colorado is 44, currently categorized as Good.

Which pollutant is found most often in Castle Rock, Colorado?

The most common pollutant in Castle Rock, Colorado is PM2.5.

What can I do if the air quality in Castle Rock, Colorado is poor?

If the air quality in Castle Rock, Colorado is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Castle Rock, Colorado?

The measured PM_2.5 levels in Castle Rock, Colorado at present are 7.671 μg/m³.

What are the current PM₁₀ levels at Castle Rock, Colorado?

The current PM₁₀ levels in Castle Rock, Colorado are 46.286 μg/m³.

What are the current carbon monoxide (CO) levels at Castle Rock, Colorado?

The current carbon monoxide (CO) level in Castle Rock, Colorado is 0.282 ppm.

What are the current sulfur dioxide (SO₂) levels at Castle Rock, Colorado?

The current sulfur dioxide (SO₂) levels in Castle Rock, Colorado are 0.427 ppb.

What are the current ozone (O₃) levels at Castle Rock, Colorado?

The current ozone (O₃) levels at Castle Rock, Colorado is 36.932 ppm.

What are the current nitrogen dioxide (NO₂) levels at Castle Rock, Colorado?

The current nitrogen dioxide (NO₂) levels at Castle Rock, Colorado is 16.337 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T09:00:00.000Z	37 \| good	3.367 \| good	12.635 \| good	39.501 \| good	0.597 \| good	8.174 \| good	0.348 \| good
2025-10-23T10:00:00.000Z	35 \| good	4.343 \| good	8.295 \| good	37.663 \| good	0.551 \| good	6.838 \| good	0.38 \| good
2025-10-23T11:00:00.000Z	34 \| good	3.15 \| good	11.759 \| good	37.421 \| good	0.488 \| good	10.944 \| good	0.414 \| good
2025-10-23T12:00:00.000Z	31 \| good	3.419 \| good	16.144 \| good	33.308 \| good	0.812 \| good	16.796 \| good	0.475 \| good
2025-10-23T13:00:00.000Z	34 \| good	3.57 \| good	25.637 \| good	36.81 \| good	1.116 \| good	17.398 \| good	0.607 \| good
2025-10-23T14:00:00.000Z	31 \| good	3.013 \| good	16.216 \| good	34.226 \| good	1.6 \| good	16.664 \| good	0.852 \| good
2025-10-23T15:00:00.000Z	31 \| good	4.425 \| good	19.346 \| good	32.536 \| good	1.689 \| good	21.132 \| good	0.849 \| good
2025-10-23T16:00:00.000Z	34 \| good	5.674 \| good	36.959 \| good	32.398 \| good	1.682 \| good	22.189 \| good	0.644 \| good
2025-10-23T17:00:00.000Z	31 \| good	4.813 \| good	31.643 \| good	33.79 \| good	1.647 \| good	23.447 \| good	0.473 \| good
2025-10-23T18:00:00.000Z	37 \| good	4.03 \| good	39.98 \| good	37.544 \| good	1.677 \| good	30.285 \| good	0.503 \| good
2025-10-23T19:00:00.000Z	35 \| good	3.802 \| good	31.261 \| good	37.947 \| good	1.44 \| good	24.549 \| good	0.374 \| good
2025-10-23T20:00:00.000Z	39 \| good	5.696 \| good	30.579 \| good	42.023 \| good	1.234 \| good	16.4 \| good	0.273 \| good
2025-10-23T21:00:00.000Z	40 \| good	5.877 \| good	32.426 \| good	43.07 \| good	0.824 \| good	12.246 \| good	0.279 \| good
2025-10-23T22:00:00.000Z	39 \| good	6.583 \| good	20.285 \| good	42.053 \| good	0.57 \| good	7.394 \| good	0.213 \| good
2025-10-23T23:00:00.000Z	39 \| good	3.991 \| good	30.176 \| good	42.177 \| good	0.568 \| good	7.081 \| good	0.216 \| good
2025-10-24T00:00:00.000Z	39 \| good	5.177 \| good	23.929 \| good	42.2 \| good	0.505 \| good	11.745 \| good	0.343 \| good
2025-10-24T01:00:00.000Z	38 \| good	6.953 \| good	40.595 \| good	35.573 \| good	0.508 \| good	11.473 \| good	0.411 \| good
2025-10-24T02:00:00.000Z	56 \| moderate	10.027 \| good	64.605 \| fine	37.727 \| good	0.556 \| good	10.552 \| good	0.362 \| good
2025-10-24T03:00:00.000Z	31 \| good	4.859 \| good	20.829 \| good	32.686 \| good	0.803 \| good	11.901 \| good	0.191 \| good
2025-10-24T04:00:00.000Z	44 \| good	7.781 \| good	27.611 \| good	39.119 \| good	0.577 \| good	17.629 \| good	0.296 \| good
2025-10-24T05:00:00.000Z	44 \| good	7.938 \| good	30.615 \| good	35.074 \| good	0.503 \| good	23.097 \| good	0.317 \| good
2025-10-24T06:00:00.000Z	44 \| good	7.671 \| good	46.286 \| good	36.932 \| good	0.427 \| good	16.337 \| good	0.282 \| good
2025-10-24T07:00:00.000Z	43 \| good	6.183 \| good	46.029 \| good	30.824 \| good	0.425 \| good	12.575 \| good	0.213 \| good
2025-10-24T08:00:00.000Z	33 \| good	6.048 \| good	35.793 \| good	34.051 \| good	0.433 \| good	15.22 \| good	0.213 \| good
2025-10-24T09:00:00.000Z	38 \| good	7 \| good	31.832 \| good	32.306 \| good	0.41 \| good	10.767 \| good	0.166 \| good
2025-10-24T10:00:00.000Z	33 \| good	6.075 \| good	22.782 \| good	30.859 \| good	0.349 \| good	10.654 \| good	0.166 \| good
2025-10-24T11:00:00.000Z	38 \| good	7.068 \| good	39.939 \| good	29.95 \| good	0.446 \| good	11.781 \| good	0.201 \| good
2025-10-24T12:00:00.000Z	44 \| good	7.51 \| good	24.566 \| good	27.988 \| good	0.595 \| good	22.851 \| good	0.229 \| good
2025-10-24T13:00:00.000Z	30 \| good	5.251 \| good	17.411 \| good	27.678 \| good	0.585 \| good	32.167 \| good	0.397 \| good
2025-10-24T14:00:00.000Z	40 \| good	6.718 \| good	43.19 \| good	28.006 \| good	0.859 \| good	34.496 \| good	0.555 \| good
2025-10-24T15:00:00.000Z	49 \| good	8.923 \| good	32.421 \| good	32.733 \| good	0.994 \| good	17.483 \| good	0.541 \| good
2025-10-24T16:00:00.000Z	59 \| moderate	8.637 \| good	70.521 \| fine	33.614 \| good	1.402 \| good	15.296 \| good	0.374 \| good
2025-10-24T17:00:00.000Z	45 \| good	5.876 \| good	48.677 \| good	32.506 \| good	1.207 \| good	12.823 \| good	0.213 \| good
2025-10-24T18:00:00.000Z	35 \| good	5.533 \| good	26.214 \| good	37.928 \| good	1.184 \| good	13.746 \| good	0.247 \| good
2025-10-24T19:00:00.000Z	34 \| good	5.238 \| good	18.764 \| good	37.419 \| good	1.011 \| good	13.597 \| good	0.213 \| good
2025-10-24T20:00:00.000Z	42 \| good	4.924 \| good	21.845 \| good	44.65 \| good	0.758 \| good	13.891 \| good	0.213 \| good
2025-10-24T21:00:00.000Z	43 \| good	4.383 \| good	22.569 \| good	46.313 \| good	0.629 \| good	12.161 \| good	0.178 \| good
2025-10-24T22:00:00.000Z	45 \| good	4.088 \| good	26.322 \| good	48.982 \| good	0.762 \| good	7.015 \| good	0.213 \| good
2025-10-24T23:00:00.000Z	46 \| good	4.584 \| good	21.325 \| good	49.678 \| good	0.665 \| good	5.877 \| good	0.213 \| good
2025-10-25T00:00:00.000Z	47 \| good	5.649 \| good	31.632 \| good	50.657 \| good	0.728 \| good	7.153 \| good	0.192 \| good
2025-10-25T01:00:00.000Z	43 \| good	6.494 \| good	33.961 \| good	46.366 \| good	0.598 \| good	9.591 \| good	0.371 \| good
2025-10-25T02:00:00.000Z	42 \| good	6.101 \| good	10.514 \| good	45.086 \| good	0.731 \| good	17.34 \| good	0.675 \| good
2025-10-25T03:00:00.000Z	37 \| good	1.387 \| good	5.293 \| good	40.034 \| good	0.915 \| good	16.743 \| good	0.251 \| good
2025-10-25T04:00:00.000Z	36 \| good	3.711 \| good	8.639 \| good	39.093 \| good	1.059 \| good	14.356 \| good	0.643 \| good
2025-10-25T05:00:00.000Z	36 \| good	4.32 \| good	20.538 \| good	39.218 \| good	0.801 \| good	16.902 \| good	0.651 \| good
2025-10-25T06:00:00.000Z	38 \| good	5.185 \| good	21.472 \| good	41.068 \| good	0.713 \| good	20.671 \| good	0.656 \| good
2025-10-25T07:00:00.000Z	32 \| good	4.41 \| good	14.79 \| good	34.633 \| good	0.5 \| good	16.281 \| good	0.318 \| good
2025-10-25T08:00:00.000Z	32 \| good	4.41 \| good	14.79 \| good	34.633 \| good	0.5 \| good	16.281 \| good	0.318 \| good
2025-10-24T07:00:00.000Z	30 \| good	3.969 \| good	17.186 \| good	31.698 \| good	1.165 \| good	16.293 \| good	0.206 \| good
2025-10-24T08:00:00.000Z	28 \| good	4.728 \| good	20.318 \| good	30.234 \| good	1.144 \| good	14.327 \| good	0.193 \| good
2025-10-24T09:00:00.000Z	26 \| good	4.232 \| good	18.252 \| good	28.34 \| good	1.124 \| good	12.361 \| good	0.179 \| good
2025-10-24T10:00:00.000Z	26 \| good	4.405 \| good	19.196 \| good	27.963 \| good	1.099 \| good	11.214 \| good	0.169 \| good
2025-10-24T11:00:00.000Z	27 \| good	4.642 \| good	19.99 \| good	22.11 \| good	1.074 \| good	10.067 \| good	0.159 \| good
2025-10-24T12:00:00.000Z	27 \| good	4.767 \| good	20.829 \| good	21.54 \| good	1.05 \| good	8.92 \| good	0.148 \| good
2025-10-24T13:00:00.000Z	33 \| good	5.582 \| good	24.163 \| good	21.721 \| good	1.101 \| good	10.353 \| good	0.19 \| good
2025-10-24T14:00:00.000Z	27 \| good	5.329 \| good	23.186 \| good	26.278 \| good	1.151 \| good	11.785 \| good	0.231 \| good
2025-10-24T15:00:00.000Z	31 \| good	3.623 \| good	15.948 \| good	33.562 \| good	1.202 \| good	13.218 \| good	0.273 \| good
2025-10-24T16:00:00.000Z	32 \| good	3.835 \| good	16.706 \| good	34.55 \| good	1.12 \| good	9.706 \| good	0.227 \| good
2025-10-24T17:00:00.000Z	30 \| good	4.102 \| good	18.149 \| good	31.612 \| good	1.039 \| good	6.194 \| good	0.181 \| good
2025-10-24T18:00:00.000Z	32 \| good	3.907 \| good	17.074 \| good	34.896 \| good	0.957 \| good	2.683 \| good	0.135 \| good
2025-10-24T19:00:00.000Z	36 \| good	3.347 \| good	14.762 \| good	38.948 \| good	0.877 \| good	2.379 \| good	0.131 \| good
2025-10-24T20:00:00.000Z	41 \| good	3.145 \| good	13.658 \| good	43.566 \| good	0.796 \| good	2.074 \| good	0.128 \| good
2025-10-24T21:00:00.000Z	43 \| good	2.479 \| good	10.157 \| good	45.771 \| good	0.716 \| good	1.77 \| good	0.125 \| good
2025-10-24T22:00:00.000Z	45 \| good	2.201 \| good	9.159 \| good	48.859 \| good	0.731 \| good	3.708 \| good	0.139 \| good
2025-10-24T23:00:00.000Z	46 \| good	2.049 \| good	8.437 \| good	49.952 \| good	0.746 \| good	5.646 \| good	0.153 \| good
2025-10-25T00:00:00.000Z	40 \| good	4.683 \| good	20.619 \| good	43.479 \| good	0.761 \| good	7.584 \| good	0.166 \| good
2025-10-25T01:00:00.000Z	35 \| good	4.738 \| good	20.649 \| good	38.06 \| good	0.936 \| good	13.468 \| good	0.217 \| good
2025-10-25T02:00:00.000Z	32 \| good	4.022 \| good	17.108 \| good	35.303 \| good	1.11 \| good	19.352 \| good	0.268 \| good
2025-10-25T03:00:00.000Z	27 \| good	3.313 \| good	13.954 \| good	29.035 \| good	1.285 \| good	25.236 \| good	0.319 \| good
2025-10-25T04:00:00.000Z	30 \| good	4.349 \| good	19.079 \| good	31.823 \| good	1.15 \| good	24.121 \| good	0.324 \| good
2025-10-25T05:00:00.000Z	32 \| good	2.542 \| good	10.582 \| good	34.597 \| good	1.016 \| good	23.005 \| good	0.329 \| good
2025-10-25T06:00:00.000Z	30 \| good	1.633 \| good	6.718 \| good	32.436 \| good	0.881 \| good	21.89 \| good	0.333 \| good
2025-10-25T07:00:00.000Z	30 \| good	1.537 \| good	6.399 \| good	32.097 \| good	0.788 \| good	19.818 \| good	0.304 \| good
2025-10-25T08:00:00.000Z	31 \| good	2.945 \| good	12.459 \| good	33.387 \| good	0.695 \| good	17.746 \| good	0.275 \| good
2025-10-25T09:00:00.000Z	31 \| good	2.253 \| good	9.263 \| good	33.089 \| good	0.602 \| good	15.674 \| good	0.246 \| good
2025-10-25T10:00:00.000Z	29 \| good	2.361 \| good	9.453 \| good	31.329 \| good	0.577 \| good	14.244 \| good	0.225 \| good
2025-10-25T11:00:00.000Z	32 \| good	1.71 \| good	7.236 \| good	34.695 \| good	0.552 \| good	12.814 \| good	0.203 \| good
2025-10-25T12:00:00.000Z	31 \| good	1.664 \| good	7.154 \| good	33.427 \| good	0.527 \| good	11.384 \| good	0.182 \| good
2025-10-25T13:00:00.000Z	28 \| good	2.39 \| good	9.74 \| good	30.083 \| good	0.579 \| good	10.955 \| good	0.197 \| good
2025-10-25T14:00:00.000Z	29 \| good	2.899 \| good	11.999 \| good	31.026 \| good	0.631 \| good	10.526 \| good	0.213 \| good
2025-10-25T15:00:00.000Z	34 \| good	2.382 \| good	9.573 \| good	36.602 \| good	0.683 \| good	10.097 \| good	0.228 \| good
2025-10-25T16:00:00.000Z	38 \| good	2.301 \| good	9.542 \| good	40.891 \| good	0.699 \| good	7.502 \| good	0.19 \| good
2025-10-25T17:00:00.000Z	41 \| good	1.326 \| good	5.399 \| good	43.502 \| good	0.716 \| good	4.907 \| good	0.152 \| good
2025-10-25T18:00:00.000Z	43 \| good	0.405 \| good	1.401 \| good	45.963 \| good	0.732 \| good	2.311 \| good	0.113 \| good
2025-10-25T19:00:00.000Z	44 \| good	0.478 \| good	2 \| good	48.373 \| good	0.645 \| good	1.954 \| good	0.109 \| good
2025-10-25T20:00:00.000Z	46 \| good	0.331 \| good	1.081 \| good	50.132 \| good	0.558 \| good	1.596 \| good	0.105 \| good
2025-10-25T21:00:00.000Z	49 \| good	0.556 \| good	2.028 \| good	52.563 \| good	0.47 \| good	1.238 \| good	0.1 \| good
2025-10-25T22:00:00.000Z	46 \| good	0.524 \| good	1.972 \| good	50.239 \| good	0.505 \| good	3.013 \| good	0.114 \| good
2025-10-25T23:00:00.000Z	46 \| good	1.083 \| good	4.307 \| good	50.228 \| good	0.54 \| good	4.788 \| good	0.128 \| good
2025-10-26T00:00:00.000Z	44 \| good	1.552 \| good	6.16 \| good	46.851 \| good	0.574 \| good	6.563 \| good	0.142 \| good
2025-10-26T01:00:00.000Z	43 \| good	1.415 \| good	5.439 \| good	45.525 \| good	0.621 \| good	8.428 \| good	0.158 \| good
2025-10-26T02:00:00.000Z	38 \| good	1.493 \| good	6.298 \| good	40.91 \| good	0.668 \| good	10.293 \| good	0.174 \| good
2025-10-26T03:00:00.000Z	34 \| good	1.449 \| good	5.765 \| good	37.438 \| good	0.715 \| good	12.158 \| good	0.19 \| good
2025-10-26T04:00:00.000Z	27 \| good	1.86 \| good	7.702 \| good	29.147 \| good	0.689 \| good	11.492 \| good	0.185 \| good
2025-10-26T05:00:00.000Z	30 \| good	1.607 \| good	6.587 \| good	31.856 \| good	0.662 \| good	10.825 \| good	0.181 \| good
2025-10-26T06:00:00.000Z	27 \| good	4.695 \| good	4.961 \| good	29.323 \| good	0.644 \| good	10.34 \| good	0.177 \| good

Real-time air quality index in Castle Rock, Colorado today

Common air pollutants in Castle Rock, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Castle Rock, Colorado air quality forecast and history

Empower business decisions with accurate air quality data

Castle Rock, Colorado air quality map: Real-time AQI near you

Air quality in nearby cities

Castle Pines, Colorado

The Pinery, Colorado

Parker, Colorado

Lone Tree, Colorado

Highlands Ranch, Colorado

Centennial, Colorado

How accurate is Colorado, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Castle Rock, Colorado updated?

When did Castle Rock, Colorado experience the worst air quality in the last 24 hours?

When did Castle Rock, Colorado have its best air quality in the last 24 hours?

What is the real-time air quality index for Castle Rock, Colorado?

Which pollutant is found most often in Castle Rock, Colorado?

What can I do if the air quality in Castle Rock, Colorado is poor?

What are the current PM2.5 levels in Castle Rock, Colorado?

What are the current PM10 levels at Castle Rock, Colorado?

What are the current carbon monoxide (CO) levels at Castle Rock, Colorado?

What are the current sulfur dioxide (SO2) levels at Castle Rock, Colorado?

What are the current ozone (O3) levels at Castle Rock, Colorado?

What are the current nitrogen dioxide (NO2) levels at Castle Rock, Colorado?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Castle Rock, Colorado?

What are the current PM₁₀ levels at Castle Rock, Colorado?

What are the current sulfur dioxide (SO₂) levels at Castle Rock, Colorado?

What are the current ozone (O₃) levels at Castle Rock, Colorado?

What are the current nitrogen dioxide (NO₂) levels at Castle Rock, Colorado?