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

The current PM10 levels in Castle Rock, Colorado are 6.609 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 0.441 ppb.

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

The current ozone (O3) levels at Castle Rock, Colorado is 46.307 ppm.

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

The current nitrogen dioxide (NO2) levels at Castle Rock, Colorado is 4.027 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 1.299 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)

1.30 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

6.61 μg/m³

155

255

425

605+

Ozone (O₃)

46.31 ppb

201

201+

Sulfur Dioxide (SO₂)

0.44 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.03 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2026-04-22T05:00:00.000Z	48 \| good	5.009 \| good	26.4 \| good	51.682 \| good	0.646 \| good	13.862 \| good	0.258 \| good
2026-04-22T06:00:00.000Z	48 \| good	4.706 \| good	23.172 \| good	51.573 \| good	0.646 \| good	13.589 \| good	0.258 \| good
2026-04-22T07:00:00.000Z	46 \| good	4.317 \| good	19.572 \| good	49.611 \| good	0.673 \| good	11.576 \| good	0.297 \| good
2026-04-22T08:00:00.000Z	44 \| good	4.31 \| good	17.445 \| good	48.481 \| good	0.64 \| good	10.603 \| good	0.188 \| good
2026-04-22T09:00:00.000Z	44 \| good	4.098 \| good	16.041 \| good	48.213 \| good	0.641 \| good	8.95 \| good	0.158 \| good
2026-04-22T10:00:00.000Z	44 \| good	3.772 \| good	16.034 \| good	46.663 \| good	0.735 \| good	10.007 \| good	0.166 \| good
2026-04-22T11:00:00.000Z	42 \| good	3.665 \| good	14.469 \| good	45.359 \| good	0.84 \| good	18.129 \| good	0.217 \| good
2026-04-22T12:00:00.000Z	43 \| good	3.79 \| good	12.328 \| good	45.72 \| good	0.883 \| good	25.697 \| good	0.359 \| good
2026-04-22T13:00:00.000Z	40 \| good	3.665 \| good	12.962 \| good	42.54 \| good	0.825 \| good	30.439 \| good	0.389 \| good
2026-04-22T14:00:00.000Z	39 \| good	3.736 \| good	15.828 \| good	42.102 \| good	0.873 \| good	25.162 \| good	0.262 \| good
2026-04-22T15:00:00.000Z	41 \| good	3.916 \| good	16.654 \| good	44.068 \| good	0.875 \| good	23.458 \| good	0.321 \| good
2026-04-22T16:00:00.000Z	44 \| good	3.781 \| good	15.893 \| good	47.666 \| good	0.6 \| good	18.873 \| good	0.313 \| good
2026-04-22T17:00:00.000Z	46 \| good	3.958 \| good	18.294 \| good	49.887 \| good	0.534 \| good	14.375 \| good	0.254 \| good
2026-04-22T18:00:00.000Z	48 \| good	4.01 \| good	23.995 \| good	51.854 \| good	0.433 \| good	11.766 \| good	0.248 \| good
2026-04-22T19:00:00.000Z	49 \| good	2.917 \| good	25.733 \| good	53.236 \| good	0.455 \| good	9.312 \| good	0.182 \| good
2026-04-22T20:00:00.000Z	49 \| good	2.965 \| good	21.17 \| good	53.129 \| good	0.385 \| good	10.084 \| good	0.24 \| good
2026-04-22T21:00:00.000Z	51 \| moderate	3.123 \| good	25.692 \| good	55.435 \| fine	0.364 \| good	10.854 \| good	0.269 \| good
2026-04-22T22:00:00.000Z	51 \| moderate	2.266 \| good	15.786 \| good	54.927 \| good	0.432 \| good	9.701 \| good	0.269 \| good
2026-04-22T23:00:00.000Z	50 \| good	2.452 \| good	19.789 \| good	54.043 \| good	0.32 \| good	8.023 \| good	0.21 \| good
2026-04-23T00:00:00.000Z	57 \| moderate	4.428 \| good	68.183 \| fine	54.632 \| good	0.338 \| good	6.881 \| good	0.21 \| good
2026-04-23T01:00:00.000Z	54 \| moderate	3.459 \| good	57.179 \| fine	56.104 \| fine	0.226 \| good	7.635 \| good	0.203 \| good
2026-04-23T02:00:00.000Z	51 \| moderate	2.557 \| good	13.682 \| good	54.859 \| good	0.318 \| good	8.058 \| good	0.203 \| good
2026-04-23T03:00:00.000Z	49 \| good	2.467 \| good	13.582 \| good	53.366 \| good	0.425 \| good	8.896 \| good	0.21 \| good
2026-04-23T04:00:00.000Z	47 \| good	2.794 \| good	13.46 \| good	50.655 \| good	0.3 \| good	9.222 \| good	0.264 \| good
2026-04-23T05:00:00.000Z	46 \| good	2.828 \| good	27.405 \| good	50.324 \| good	0.314 \| good	8.827 \| good	0.258 \| good
2026-04-23T06:00:00.000Z	45 \| good	3.326 \| good	22.144 \| good	49.008 \| good	0.3 \| good	10.501 \| good	0.203 \| good
2026-04-23T07:00:00.000Z	45 \| good	4.662 \| good	29.266 \| good	49.031 \| good	0.486 \| good	7.223 \| good	0.152 \| good
2026-04-23T08:00:00.000Z	44 \| good	4.816 \| good	28.591 \| good	47.374 \| good	0.483 \| good	5.437 \| good	0.1 \| good
2026-04-23T09:00:00.000Z	45 \| good	4.57 \| good	31.77 \| good	48.713 \| good	0.296 \| good	4.204 \| good	0.1 \| good
2026-04-23T10:00:00.000Z	44 \| good	3.966 \| good	31.453 \| good	48.061 \| good	0.333 \| good	5.47 \| good	0.1 \| good
2026-04-23T11:00:00.000Z	43 \| good	4.153 \| good	37.875 \| good	45.863 \| good	0.376 \| good	10.845 \| good	0.234 \| good
2026-04-23T12:00:00.000Z	41 \| good	3.9 \| good	23.418 \| good	44.303 \| good	0.429 \| good	15.972 \| good	0.22 \| good
2026-04-23T13:00:00.000Z	42 \| good	3.352 \| good	23.128 \| good	45.215 \| good	0.435 \| good	24.573 \| good	0.323 \| good
2026-04-23T14:00:00.000Z	44 \| good	4.128 \| good	30.239 \| good	48.41 \| good	0.458 \| good	19.568 \| good	0.285 \| good
2026-04-23T15:00:00.000Z	48 \| good	3.752 \| good	21.799 \| good	51.966 \| good	0.534 \| good	14.801 \| good	0.307 \| good
2026-04-23T16:00:00.000Z	50 \| good	2.81 \| good	17.105 \| good	53.936 \| good	0.426 \| good	9.291 \| good	0.203 \| good
2026-04-23T17:00:00.000Z	61 \| moderate	2.26 \| good	14.202 \| good	58.454 \| fine	0.296 \| good	9.025 \| good	0.203 \| good
2026-04-23T18:00:00.000Z	77 \| moderate	2.497 \| good	25.149 \| good	62.719 \| fine	0.427 \| good	7.594 \| good	0.203 \| good
2026-04-23T19:00:00.000Z	64 \| moderate	2.231 \| good	15.137 \| good	59.3 \| fine	0.249 \| good	9.648 \| good	0.261 \| good
2026-04-23T20:00:00.000Z	64 \| moderate	2.622 \| good	25.091 \| good	59.087 \| fine	0.209 \| good	9.164 \| good	0.203 \| good
2026-04-23T21:00:00.000Z	61 \| moderate	1.961 \| good	24.42 \| good	58.194 \| fine	0.363 \| good	10.797 \| good	0.255 \| good
2026-04-23T22:00:00.000Z	58 \| moderate	2.267 \| good	21.336 \| good	56.833 \| fine	0.211 \| good	8.967 \| good	0.285 \| good
2026-04-23T23:00:00.000Z	50 \| good	2.67 \| good	34.335 \| good	53.532 \| good	0.454 \| good	8.709 \| good	0.261 \| good
2026-04-24T00:00:00.000Z	47 \| good	1.559 \| good	9.27 \| good	51.195 \| good	0.423 \| good	7.245 \| good	0.255 \| good
2026-04-24T01:00:00.000Z	46 \| good	1.562 \| good	10.459 \| good	50.151 \| good	0.272 \| good	7.714 \| good	0.255 \| good
2026-04-24T02:00:00.000Z	44 \| good	0.894 \| good	6.026 \| good	48.255 \| good	0.514 \| good	7.578 \| good	0.255 \| good
2026-04-24T03:00:00.000Z	132 \| sensitive	47.74 \| moderate	214.614 \| moderate	46.13 \| good	0.399 \| good	6.631 \| good	0.158 \| good
2026-04-24T04:00:00.000Z	42 \| good	1.164 \| good	5.665 \| good	45.199 \| good	0.382 \| good	5.77 \| good	0.216 \| good
2026-04-24T04:00:00.000Z	43 \| good	1.299 \| good	6.609 \| good	46.307 \| good	0.441 \| good	4.027 \| good	0.193 \| good
2026-04-24T05:00:00.000Z	84 \| moderate	27.194 \| fine	117.666 \| fine	49.279 \| good	0.531 \| good	10.813 \| good	0.186 \| good
2026-04-24T06:00:00.000Z	49 \| good	8.652 \| good	38.674 \| good	52.786 \| good	0.582 \| good	11.993 \| good	0.195 \| good
2026-04-24T07:00:00.000Z	46 \| good	1.675 \| good	6.598 \| good	49.885 \| good	0.507 \| good	9.657 \| good	0.18 \| good
2026-04-24T08:00:00.000Z	47 \| good	0.516 \| good	2.147 \| good	50.999 \| good	0.433 \| good	7.321 \| good	0.166 \| good
2026-04-24T09:00:00.000Z	46 \| good	1.671 \| good	6.838 \| good	49.826 \| good	0.358 \| good	4.986 \| good	0.151 \| good
2026-04-24T10:00:00.000Z	44 \| good	3.547 \| good	15.479 \| good	47.172 \| good	0.343 \| good	4.473 \| good	0.146 \| good
2026-04-24T11:00:00.000Z	36 \| good	4.107 \| good	17.912 \| good	38.731 \| good	0.328 \| good	3.96 \| good	0.141 \| good
2026-04-24T12:00:00.000Z	34 \| good	4.267 \| good	18.934 \| good	37.363 \| good	0.313 \| good	3.448 \| good	0.136 \| good
2026-04-24T13:00:00.000Z	34 \| good	3.234 \| good	14.102 \| good	37.121 \| good	0.366 \| good	3.258 \| good	0.138 \| good
2026-04-24T14:00:00.000Z	39 \| good	3.632 \| good	15.702 \| good	41.967 \| good	0.42 \| good	3.068 \| good	0.139 \| good
2026-04-24T15:00:00.000Z	44 \| good	4.176 \| good	18.036 \| good	47.96 \| good	0.474 \| good	2.878 \| good	0.14 \| good
2026-04-24T16:00:00.000Z	48 \| good	3.72 \| good	16.482 \| good	52.141 \| good	0.387 \| good	2.172 \| good	0.131 \| good
2026-04-24T17:00:00.000Z	50 \| good	2.766 \| good	11.617 \| good	53.596 \| good	0.301 \| good	1.465 \| good	0.123 \| good
2026-04-24T18:00:00.000Z	51 \| moderate	2.983 \| good	12.598 \| good	55.054 \| fine	0.215 \| good	0.758 \| good	0.114 \| good
2026-04-24T19:00:00.000Z	61 \| moderate	4.389 \| good	19.244 \| good	58.484 \| fine	0.192 \| good	0.664 \| good	0.112 \| good
2026-04-24T20:00:00.000Z	80 \| moderate	4.041 \| good	17.969 \| good	63.736 \| fine	0.168 \| good	0.57 \| good	0.11 \| good
2026-04-24T21:00:00.000Z	87 \| moderate	3.895 \| good	17.181 \| good	66 \| fine	0.145 \| good	0.476 \| good	0.108 \| good
2026-04-24T22:00:00.000Z	84 \| moderate	4.534 \| good	19.488 \| good	64.64 \| fine	0.145 \| good	0.564 \| good	0.109 \| good
2026-04-24T23:00:00.000Z	80 \| moderate	0.794 \| good	2.941 \| good	64.129 \| fine	0.145 \| good	0.652 \| good	0.11 \| good
2026-04-25T00:00:00.000Z	80 \| moderate	2.857 \| good	11.862 \| good	63.599 \| fine	0.145 \| good	0.74 \| good	0.111 \| good
2026-04-25T01:00:00.000Z	71 \| moderate	1.784 \| good	7.774 \| good	60.573 \| fine	0.225 \| good	2.552 \| good	0.123 \| good
2026-04-25T02:00:00.000Z	47 \| good	1.588 \| good	6.393 \| good	51.316 \| good	0.305 \| good	4.364 \| good	0.134 \| good
2026-04-25T03:00:00.000Z	46 \| good	2.158 \| good	9.002 \| good	50.163 \| good	0.386 \| good	6.177 \| good	0.146 \| good
2026-04-25T04:00:00.000Z	46 \| good	4.207 \| good	18.774 \| good	50.169 \| good	0.416 \| good	7.335 \| good	0.156 \| good
2026-04-25T05:00:00.000Z	48 \| good	8.216 \| good	35.977 \| good	51.95 \| good	0.447 \| good	8.493 \| good	0.166 \| good
2026-04-25T06:00:00.000Z	58 \| moderate	12.929 \| fine	58.628 \| fine	39.864 \| good	0.477 \| good	9.652 \| good	0.176 \| good
2026-04-25T07:00:00.000Z	34 \| good	5.491 \| good	24.58 \| good	37.137 \| good	0.447 \| good	7.344 \| good	0.164 \| good
2026-04-25T08:00:00.000Z	35 \| good	3.853 \| good	16.582 \| good	38.021 \| good	0.416 \| good	5.036 \| good	0.151 \| good
2026-04-25T09:00:00.000Z	35 \| good	2.034 \| good	8.144 \| good	37.994 \| good	0.386 \| good	2.729 \| good	0.139 \| good
2026-04-25T10:00:00.000Z	35 \| good	2.342 \| good	9.705 \| good	37.853 \| good	0.438 \| good	2.877 \| good	0.139 \| good
2026-04-25T11:00:00.000Z	37 \| good	2.678 \| good	10.924 \| good	39.905 \| good	0.49 \| good	3.026 \| good	0.139 \| good
2026-04-25T12:00:00.000Z	41 \| good	4.232 \| good	18.601 \| good	43.967 \| good	0.542 \| good	3.174 \| good	0.14 \| good
2026-04-25T13:00:00.000Z	39 \| good	4.627 \| good	20.381 \| good	42.131 \| good	0.533 \| good	2.938 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	41 \| good	4.998 \| good	21.741 \| good	43.505 \| good	0.524 \| good	2.702 \| good	0.141 \| good
2026-04-25T15:00:00.000Z	39 \| good	5.568 \| good	23.917 \| good	41.879 \| good	0.515 \| good	2.465 \| good	0.142 \| good
2026-04-25T16:00:00.000Z	41 \| good	6.863 \| good	30.666 \| good	44.197 \| good	0.488 \| good	2.15 \| good	0.14 \| good
2026-04-25T17:00:00.000Z	44 \| good	7.028 \| good	31.375 \| good	47.033 \| good	0.461 \| good	1.834 \| good	0.137 \| good
2026-04-25T18:00:00.000Z	45 \| good	5.469 \| good	23.114 \| good	48.783 \| good	0.434 \| good	1.518 \| good	0.135 \| good
2026-04-25T19:00:00.000Z	47 \| good	4.427 \| good	19.173 \| good	50.98 \| good	0.39 \| good	1.302 \| good	0.133 \| good
2026-04-25T20:00:00.000Z	50 \| good	3.712 \| good	16.222 \| good	54.248 \| good	0.347 \| good	1.085 \| good	0.13 \| good
2026-04-25T21:00:00.000Z	58 \| moderate	3.74 \| good	16.525 \| good	56.72 \| fine	0.304 \| good	0.868 \| good	0.128 \| good
2026-04-25T22:00:00.000Z	77 \| moderate	2.142 \| good	8.695 \| good	63.33 \| fine	0.294 \| good	1.091 \| good	0.128 \| good
2026-04-25T23:00:00.000Z	74 \| moderate	1.676 \| good	6.645 \| good	61.679 \| fine	0.284 \| good	1.314 \| good	0.127 \| good
2026-04-26T00:00:00.000Z	64 \| moderate	2.984 \| good	6.313 \| good	58.527 \| fine	0.275 \| good	1.555 \| good	0.127 \| good
2026-04-26T01:00:00.000Z	47 \| good	6.529 \| good	28.959 \| good	51.18 \| good	0.378 \| good	4.073 \| good	0.143 \| good
2026-04-26T02:00:00.000Z	42 \| good	4.04 \| good	17.548 \| good	45.203 \| good	0.482 \| good	6.61 \| good	0.16 \| good
2026-04-26T03:00:00.000Z	49 \| good	2.811 \| good	11.531 \| good	52.605 \| good	0.586 \| good	9.147 \| good	0.176 \| good
2026-04-26T04:00:00.000Z	51 \| moderate	2.202 \| good	8.89 \| good	55.228 \| fine	0.631 \| good	10.209 \| good	0.183 \| good

Castle Rock

Empower business decisions with accurate air quality data

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

0.16ppm

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

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

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

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

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

The real-time air quality index in Castle Rock, Colorado is 43, currently categorized as Good.

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

The most common pollutant in Castle Rock, Colorado is O3.

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 1.299 μg/m³.

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

The current PM₁₀ levels in Castle Rock, Colorado are 6.609 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 0.193 ppm.

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

The current sulfur dioxide (SO₂) levels in Castle Rock, Colorado are 0.441 ppb.

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

The current ozone (O₃) levels at Castle Rock, Colorado is 46.307 ppm.

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

The current nitrogen dioxide (NO₂) levels at Castle Rock, Colorado is 4.027 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T05:00:00.000Z	48 \| good	5.009 \| good	26.4 \| good	51.682 \| good	0.646 \| good	13.862 \| good	0.258 \| good
2026-04-22T06:00:00.000Z	48 \| good	4.706 \| good	23.172 \| good	51.573 \| good	0.646 \| good	13.589 \| good	0.258 \| good
2026-04-22T07:00:00.000Z	46 \| good	4.317 \| good	19.572 \| good	49.611 \| good	0.673 \| good	11.576 \| good	0.297 \| good
2026-04-22T08:00:00.000Z	44 \| good	4.31 \| good	17.445 \| good	48.481 \| good	0.64 \| good	10.603 \| good	0.188 \| good
2026-04-22T09:00:00.000Z	44 \| good	4.098 \| good	16.041 \| good	48.213 \| good	0.641 \| good	8.95 \| good	0.158 \| good
2026-04-22T10:00:00.000Z	44 \| good	3.772 \| good	16.034 \| good	46.663 \| good	0.735 \| good	10.007 \| good	0.166 \| good
2026-04-22T11:00:00.000Z	42 \| good	3.665 \| good	14.469 \| good	45.359 \| good	0.84 \| good	18.129 \| good	0.217 \| good
2026-04-22T12:00:00.000Z	43 \| good	3.79 \| good	12.328 \| good	45.72 \| good	0.883 \| good	25.697 \| good	0.359 \| good
2026-04-22T13:00:00.000Z	40 \| good	3.665 \| good	12.962 \| good	42.54 \| good	0.825 \| good	30.439 \| good	0.389 \| good
2026-04-22T14:00:00.000Z	39 \| good	3.736 \| good	15.828 \| good	42.102 \| good	0.873 \| good	25.162 \| good	0.262 \| good
2026-04-22T15:00:00.000Z	41 \| good	3.916 \| good	16.654 \| good	44.068 \| good	0.875 \| good	23.458 \| good	0.321 \| good
2026-04-22T16:00:00.000Z	44 \| good	3.781 \| good	15.893 \| good	47.666 \| good	0.6 \| good	18.873 \| good	0.313 \| good
2026-04-22T17:00:00.000Z	46 \| good	3.958 \| good	18.294 \| good	49.887 \| good	0.534 \| good	14.375 \| good	0.254 \| good
2026-04-22T18:00:00.000Z	48 \| good	4.01 \| good	23.995 \| good	51.854 \| good	0.433 \| good	11.766 \| good	0.248 \| good
2026-04-22T19:00:00.000Z	49 \| good	2.917 \| good	25.733 \| good	53.236 \| good	0.455 \| good	9.312 \| good	0.182 \| good
2026-04-22T20:00:00.000Z	49 \| good	2.965 \| good	21.17 \| good	53.129 \| good	0.385 \| good	10.084 \| good	0.24 \| good
2026-04-22T21:00:00.000Z	51 \| moderate	3.123 \| good	25.692 \| good	55.435 \| fine	0.364 \| good	10.854 \| good	0.269 \| good
2026-04-22T22:00:00.000Z	51 \| moderate	2.266 \| good	15.786 \| good	54.927 \| good	0.432 \| good	9.701 \| good	0.269 \| good
2026-04-22T23:00:00.000Z	50 \| good	2.452 \| good	19.789 \| good	54.043 \| good	0.32 \| good	8.023 \| good	0.21 \| good
2026-04-23T00:00:00.000Z	57 \| moderate	4.428 \| good	68.183 \| fine	54.632 \| good	0.338 \| good	6.881 \| good	0.21 \| good
2026-04-23T01:00:00.000Z	54 \| moderate	3.459 \| good	57.179 \| fine	56.104 \| fine	0.226 \| good	7.635 \| good	0.203 \| good
2026-04-23T02:00:00.000Z	51 \| moderate	2.557 \| good	13.682 \| good	54.859 \| good	0.318 \| good	8.058 \| good	0.203 \| good
2026-04-23T03:00:00.000Z	49 \| good	2.467 \| good	13.582 \| good	53.366 \| good	0.425 \| good	8.896 \| good	0.21 \| good
2026-04-23T04:00:00.000Z	47 \| good	2.794 \| good	13.46 \| good	50.655 \| good	0.3 \| good	9.222 \| good	0.264 \| good
2026-04-23T05:00:00.000Z	46 \| good	2.828 \| good	27.405 \| good	50.324 \| good	0.314 \| good	8.827 \| good	0.258 \| good
2026-04-23T06:00:00.000Z	45 \| good	3.326 \| good	22.144 \| good	49.008 \| good	0.3 \| good	10.501 \| good	0.203 \| good
2026-04-23T07:00:00.000Z	45 \| good	4.662 \| good	29.266 \| good	49.031 \| good	0.486 \| good	7.223 \| good	0.152 \| good
2026-04-23T08:00:00.000Z	44 \| good	4.816 \| good	28.591 \| good	47.374 \| good	0.483 \| good	5.437 \| good	0.1 \| good
2026-04-23T09:00:00.000Z	45 \| good	4.57 \| good	31.77 \| good	48.713 \| good	0.296 \| good	4.204 \| good	0.1 \| good
2026-04-23T10:00:00.000Z	44 \| good	3.966 \| good	31.453 \| good	48.061 \| good	0.333 \| good	5.47 \| good	0.1 \| good
2026-04-23T11:00:00.000Z	43 \| good	4.153 \| good	37.875 \| good	45.863 \| good	0.376 \| good	10.845 \| good	0.234 \| good
2026-04-23T12:00:00.000Z	41 \| good	3.9 \| good	23.418 \| good	44.303 \| good	0.429 \| good	15.972 \| good	0.22 \| good
2026-04-23T13:00:00.000Z	42 \| good	3.352 \| good	23.128 \| good	45.215 \| good	0.435 \| good	24.573 \| good	0.323 \| good
2026-04-23T14:00:00.000Z	44 \| good	4.128 \| good	30.239 \| good	48.41 \| good	0.458 \| good	19.568 \| good	0.285 \| good
2026-04-23T15:00:00.000Z	48 \| good	3.752 \| good	21.799 \| good	51.966 \| good	0.534 \| good	14.801 \| good	0.307 \| good
2026-04-23T16:00:00.000Z	50 \| good	2.81 \| good	17.105 \| good	53.936 \| good	0.426 \| good	9.291 \| good	0.203 \| good
2026-04-23T17:00:00.000Z	61 \| moderate	2.26 \| good	14.202 \| good	58.454 \| fine	0.296 \| good	9.025 \| good	0.203 \| good
2026-04-23T18:00:00.000Z	77 \| moderate	2.497 \| good	25.149 \| good	62.719 \| fine	0.427 \| good	7.594 \| good	0.203 \| good
2026-04-23T19:00:00.000Z	64 \| moderate	2.231 \| good	15.137 \| good	59.3 \| fine	0.249 \| good	9.648 \| good	0.261 \| good
2026-04-23T20:00:00.000Z	64 \| moderate	2.622 \| good	25.091 \| good	59.087 \| fine	0.209 \| good	9.164 \| good	0.203 \| good
2026-04-23T21:00:00.000Z	61 \| moderate	1.961 \| good	24.42 \| good	58.194 \| fine	0.363 \| good	10.797 \| good	0.255 \| good
2026-04-23T22:00:00.000Z	58 \| moderate	2.267 \| good	21.336 \| good	56.833 \| fine	0.211 \| good	8.967 \| good	0.285 \| good
2026-04-23T23:00:00.000Z	50 \| good	2.67 \| good	34.335 \| good	53.532 \| good	0.454 \| good	8.709 \| good	0.261 \| good
2026-04-24T00:00:00.000Z	47 \| good	1.559 \| good	9.27 \| good	51.195 \| good	0.423 \| good	7.245 \| good	0.255 \| good
2026-04-24T01:00:00.000Z	46 \| good	1.562 \| good	10.459 \| good	50.151 \| good	0.272 \| good	7.714 \| good	0.255 \| good
2026-04-24T02:00:00.000Z	44 \| good	0.894 \| good	6.026 \| good	48.255 \| good	0.514 \| good	7.578 \| good	0.255 \| good
2026-04-24T03:00:00.000Z	132 \| sensitive	47.74 \| moderate	214.614 \| moderate	46.13 \| good	0.399 \| good	6.631 \| good	0.158 \| good
2026-04-24T04:00:00.000Z	42 \| good	1.164 \| good	5.665 \| good	45.199 \| good	0.382 \| good	5.77 \| good	0.216 \| good
2026-04-24T04:00:00.000Z	43 \| good	1.299 \| good	6.609 \| good	46.307 \| good	0.441 \| good	4.027 \| good	0.193 \| good
2026-04-24T05:00:00.000Z	84 \| moderate	27.194 \| fine	117.666 \| fine	49.279 \| good	0.531 \| good	10.813 \| good	0.186 \| good
2026-04-24T06:00:00.000Z	49 \| good	8.652 \| good	38.674 \| good	52.786 \| good	0.582 \| good	11.993 \| good	0.195 \| good
2026-04-24T07:00:00.000Z	46 \| good	1.675 \| good	6.598 \| good	49.885 \| good	0.507 \| good	9.657 \| good	0.18 \| good
2026-04-24T08:00:00.000Z	47 \| good	0.516 \| good	2.147 \| good	50.999 \| good	0.433 \| good	7.321 \| good	0.166 \| good
2026-04-24T09:00:00.000Z	46 \| good	1.671 \| good	6.838 \| good	49.826 \| good	0.358 \| good	4.986 \| good	0.151 \| good
2026-04-24T10:00:00.000Z	44 \| good	3.547 \| good	15.479 \| good	47.172 \| good	0.343 \| good	4.473 \| good	0.146 \| good
2026-04-24T11:00:00.000Z	36 \| good	4.107 \| good	17.912 \| good	38.731 \| good	0.328 \| good	3.96 \| good	0.141 \| good
2026-04-24T12:00:00.000Z	34 \| good	4.267 \| good	18.934 \| good	37.363 \| good	0.313 \| good	3.448 \| good	0.136 \| good
2026-04-24T13:00:00.000Z	34 \| good	3.234 \| good	14.102 \| good	37.121 \| good	0.366 \| good	3.258 \| good	0.138 \| good
2026-04-24T14:00:00.000Z	39 \| good	3.632 \| good	15.702 \| good	41.967 \| good	0.42 \| good	3.068 \| good	0.139 \| good
2026-04-24T15:00:00.000Z	44 \| good	4.176 \| good	18.036 \| good	47.96 \| good	0.474 \| good	2.878 \| good	0.14 \| good
2026-04-24T16:00:00.000Z	48 \| good	3.72 \| good	16.482 \| good	52.141 \| good	0.387 \| good	2.172 \| good	0.131 \| good
2026-04-24T17:00:00.000Z	50 \| good	2.766 \| good	11.617 \| good	53.596 \| good	0.301 \| good	1.465 \| good	0.123 \| good
2026-04-24T18:00:00.000Z	51 \| moderate	2.983 \| good	12.598 \| good	55.054 \| fine	0.215 \| good	0.758 \| good	0.114 \| good
2026-04-24T19:00:00.000Z	61 \| moderate	4.389 \| good	19.244 \| good	58.484 \| fine	0.192 \| good	0.664 \| good	0.112 \| good
2026-04-24T20:00:00.000Z	80 \| moderate	4.041 \| good	17.969 \| good	63.736 \| fine	0.168 \| good	0.57 \| good	0.11 \| good
2026-04-24T21:00:00.000Z	87 \| moderate	3.895 \| good	17.181 \| good	66 \| fine	0.145 \| good	0.476 \| good	0.108 \| good
2026-04-24T22:00:00.000Z	84 \| moderate	4.534 \| good	19.488 \| good	64.64 \| fine	0.145 \| good	0.564 \| good	0.109 \| good
2026-04-24T23:00:00.000Z	80 \| moderate	0.794 \| good	2.941 \| good	64.129 \| fine	0.145 \| good	0.652 \| good	0.11 \| good
2026-04-25T00:00:00.000Z	80 \| moderate	2.857 \| good	11.862 \| good	63.599 \| fine	0.145 \| good	0.74 \| good	0.111 \| good
2026-04-25T01:00:00.000Z	71 \| moderate	1.784 \| good	7.774 \| good	60.573 \| fine	0.225 \| good	2.552 \| good	0.123 \| good
2026-04-25T02:00:00.000Z	47 \| good	1.588 \| good	6.393 \| good	51.316 \| good	0.305 \| good	4.364 \| good	0.134 \| good
2026-04-25T03:00:00.000Z	46 \| good	2.158 \| good	9.002 \| good	50.163 \| good	0.386 \| good	6.177 \| good	0.146 \| good
2026-04-25T04:00:00.000Z	46 \| good	4.207 \| good	18.774 \| good	50.169 \| good	0.416 \| good	7.335 \| good	0.156 \| good
2026-04-25T05:00:00.000Z	48 \| good	8.216 \| good	35.977 \| good	51.95 \| good	0.447 \| good	8.493 \| good	0.166 \| good
2026-04-25T06:00:00.000Z	58 \| moderate	12.929 \| fine	58.628 \| fine	39.864 \| good	0.477 \| good	9.652 \| good	0.176 \| good
2026-04-25T07:00:00.000Z	34 \| good	5.491 \| good	24.58 \| good	37.137 \| good	0.447 \| good	7.344 \| good	0.164 \| good
2026-04-25T08:00:00.000Z	35 \| good	3.853 \| good	16.582 \| good	38.021 \| good	0.416 \| good	5.036 \| good	0.151 \| good
2026-04-25T09:00:00.000Z	35 \| good	2.034 \| good	8.144 \| good	37.994 \| good	0.386 \| good	2.729 \| good	0.139 \| good
2026-04-25T10:00:00.000Z	35 \| good	2.342 \| good	9.705 \| good	37.853 \| good	0.438 \| good	2.877 \| good	0.139 \| good
2026-04-25T11:00:00.000Z	37 \| good	2.678 \| good	10.924 \| good	39.905 \| good	0.49 \| good	3.026 \| good	0.139 \| good
2026-04-25T12:00:00.000Z	41 \| good	4.232 \| good	18.601 \| good	43.967 \| good	0.542 \| good	3.174 \| good	0.14 \| good
2026-04-25T13:00:00.000Z	39 \| good	4.627 \| good	20.381 \| good	42.131 \| good	0.533 \| good	2.938 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	41 \| good	4.998 \| good	21.741 \| good	43.505 \| good	0.524 \| good	2.702 \| good	0.141 \| good
2026-04-25T15:00:00.000Z	39 \| good	5.568 \| good	23.917 \| good	41.879 \| good	0.515 \| good	2.465 \| good	0.142 \| good
2026-04-25T16:00:00.000Z	41 \| good	6.863 \| good	30.666 \| good	44.197 \| good	0.488 \| good	2.15 \| good	0.14 \| good
2026-04-25T17:00:00.000Z	44 \| good	7.028 \| good	31.375 \| good	47.033 \| good	0.461 \| good	1.834 \| good	0.137 \| good
2026-04-25T18:00:00.000Z	45 \| good	5.469 \| good	23.114 \| good	48.783 \| good	0.434 \| good	1.518 \| good	0.135 \| good
2026-04-25T19:00:00.000Z	47 \| good	4.427 \| good	19.173 \| good	50.98 \| good	0.39 \| good	1.302 \| good	0.133 \| good
2026-04-25T20:00:00.000Z	50 \| good	3.712 \| good	16.222 \| good	54.248 \| good	0.347 \| good	1.085 \| good	0.13 \| good
2026-04-25T21:00:00.000Z	58 \| moderate	3.74 \| good	16.525 \| good	56.72 \| fine	0.304 \| good	0.868 \| good	0.128 \| good
2026-04-25T22:00:00.000Z	77 \| moderate	2.142 \| good	8.695 \| good	63.33 \| fine	0.294 \| good	1.091 \| good	0.128 \| good
2026-04-25T23:00:00.000Z	74 \| moderate	1.676 \| good	6.645 \| good	61.679 \| fine	0.284 \| good	1.314 \| good	0.127 \| good
2026-04-26T00:00:00.000Z	64 \| moderate	2.984 \| good	6.313 \| good	58.527 \| fine	0.275 \| good	1.555 \| good	0.127 \| good
2026-04-26T01:00:00.000Z	47 \| good	6.529 \| good	28.959 \| good	51.18 \| good	0.378 \| good	4.073 \| good	0.143 \| good
2026-04-26T02:00:00.000Z	42 \| good	4.04 \| good	17.548 \| good	45.203 \| good	0.482 \| good	6.61 \| good	0.16 \| good
2026-04-26T03:00:00.000Z	49 \| good	2.811 \| good	11.531 \| good	52.605 \| good	0.586 \| good	9.147 \| good	0.176 \| good
2026-04-26T04:00:00.000Z	51 \| moderate	2.202 \| good	8.89 \| good	55.228 \| fine	0.631 \| good	10.209 \| good	0.183 \| 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?