What are the current PM10 levels at Colesville, Maryland?

The current PM10 levels in Colesville, Maryland are 39.599 μg/m3.

What are the current sulfur dioxide (SO2) levels at Colesville, Maryland?

The current sulfur dioxide (SO2) levels in Colesville, Maryland are 0.134 ppb.

What are the current ozone (O3) levels at Colesville, Maryland?

The current ozone (O3) levels at Colesville, Maryland is 36.869 ppm.

What are the current nitrogen dioxide (NO2) levels at Colesville, Maryland?

The current nitrogen dioxide (NO2) levels at Colesville, Maryland is 1.714 ppb.

Real-time air quality index in Colesville, Maryland today

Name: Live air pollution levels in Colesville, Maryland today
Creator: Ambee

Stay updated with real-time air quality in Colesville, Maryland 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

Colesville, Maryland

Last updated: ... (Local time)

Common air pollutants in Colesville, Maryland

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.62 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

16.34 μg/m³

155

255

425

605+

Ozone (O₃)

27.47 ppb

201

201+

Sulfur Dioxide (SO₂)

0.28 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.38 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.32 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Colesville, Maryland

Get Live Pollen Counts

Colesville, Maryland

Scroll To Air Quality Map

Track live Colesville, Maryland air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-26T01:00:00.000Z	33 \| good	6.413 \| good	27.819 \| good	34.742 \| good	0.174 \| good	4.208 \| good	0.224 \| good
2025-07-26T02:00:00.000Z	32 \| good	4.32 \| good	17.799 \| good	34.505 \| good	0.159 \| good	4.493 \| good	0.24 \| good
2025-07-26T03:00:00.000Z	28 \| good	3.873 \| good	17.159 \| good	30.218 \| good	0.118 \| good	5.355 \| good	0.24 \| good
2025-07-26T04:00:00.000Z	23 \| good	3.725 \| good	15.972 \| good	25.155 \| good	0.162 \| good	5.763 \| good	0.287 \| good
2025-07-26T05:00:00.000Z	22 \| good	3.826 \| good	18.681 \| good	22.635 \| good	0.195 \| good	9.065 \| good	0.319 \| good
2025-07-26T06:00:00.000Z	22 \| good	3.672 \| good	14.695 \| good	19.178 \| good	0.176 \| good	9.2 \| good	0.319 \| good
2025-07-26T07:00:00.000Z	16 \| good	3.317 \| good	12.853 \| good	15.512 \| good	0.133 \| good	8.602 \| good	0.287 \| good
2025-07-26T08:00:00.000Z	22 \| good	3.644 \| good	13.142 \| good	11.805 \| good	0.144 \| good	7.741 \| good	0.302 \| good
2025-07-26T09:00:00.000Z	27 \| good	4.511 \| good	19.217 \| good	9.539 \| good	0.126 \| good	6.754 \| good	0.285 \| good
2025-07-26T10:00:00.000Z	27 \| good	4.857 \| good	21.547 \| good	9.182 \| good	0.123 \| good	6.679 \| good	0.302 \| good
2025-07-26T11:00:00.000Z	27 \| good	5.297 \| good	22.942 \| good	9.183 \| good	0.157 \| good	7.757 \| good	0.288 \| good
2025-07-26T12:00:00.000Z	27 \| good	4.62 \| good	19.251 \| good	10.904 \| good	0.144 \| good	7.01 \| good	0.294 \| good
2025-07-26T13:00:00.000Z	33 \| good	5.859 \| good	23.909 \| good	16.377 \| good	0.166 \| good	5.405 \| good	0.262 \| good
2025-07-26T14:00:00.000Z	33 \| good	5.706 \| good	24.106 \| good	24.199 \| good	0.141 \| good	4.876 \| good	0.247 \| good
2025-07-26T15:00:00.000Z	33 \| good	5.588 \| good	23.092 \| good	28.796 \| good	0.284 \| good	5.146 \| good	0.24 \| good
2025-07-26T16:00:00.000Z	32 \| good	5.059 \| good	21.143 \| good	35.494 \| good	0.32 \| good	4.608 \| good	0.24 \| good
2025-07-26T17:00:00.000Z	38 \| good	5.051 \| good	21.094 \| good	41.398 \| good	0.175 \| good	3.282 \| good	0.224 \| good
2025-07-26T18:00:00.000Z	42 \| good	5.057 \| good	20.833 \| good	45.351 \| good	0.219 \| good	2.693 \| good	0.224 \| good
2025-07-26T19:00:00.000Z	44 \| good	5.374 \| good	22.836 \| good	46.615 \| good	0.119 \| good	2.881 \| good	0.224 \| good
2025-07-26T20:00:00.000Z	43 \| good	5.279 \| good	24.392 \| good	46.023 \| good	0.129 \| good	2.437 \| good	0.255 \| good
2025-07-26T21:00:00.000Z	40 \| good	5.328 \| good	23.15 \| good	42.716 \| good	0.274 \| good	1.965 \| good	0.255 \| good
2025-07-26T22:00:00.000Z	38 \| good	4.938 \| good	22.192 \| good	40.893 \| good	0.196 \| good	2.669 \| good	0.255 \| good
2025-07-26T23:00:00.000Z	36 \| good	4.885 \| good	21.016 \| good	38.803 \| good	0.124 \| good	3.295 \| good	0.255 \| good
2025-07-27T00:00:00.000Z	35 \| good	6.003 \| good	25.022 \| good	38.116 \| good	0.15 \| good	3.668 \| good	0.286 \| good
2025-07-27T01:00:00.000Z	35 \| good	5.953 \| good	27.615 \| good	37.815 \| good	0.213 \| good	3.259 \| good	0.325 \| good
2025-07-27T02:00:00.000Z	44 \| good	7.506 \| good	32.763 \| good	35.993 \| good	0.157 \| good	3.989 \| good	0.294 \| good
2025-07-27T03:00:00.000Z	49 \| good	8.799 \| good	35.447 \| good	32.045 \| good	0.175 \| good	4.622 \| good	0.294 \| good
2025-07-27T04:00:00.000Z	44 \| good	8.091 \| good	34.206 \| good	30.286 \| good	0.19 \| good	3.247 \| good	0.278 \| good
2025-07-27T05:00:00.000Z	38 \| good	7.303 \| good	31.174 \| good	28.944 \| good	0.247 \| good	2.801 \| good	0.325 \| good
2025-07-27T06:00:00.000Z	49 \| good	9.154 \| good	44.727 \| good	24.234 \| good	0.179 \| good	2.482 \| good	0.294 \| good
2025-07-27T07:00:00.000Z	44 \| good	7.914 \| good	34.536 \| good	26.031 \| good	0.152 \| good	2.086 \| good	0.24 \| good
2025-07-27T08:00:00.000Z	42 \| good	5.685 \| good	45.025 \| good	22.301 \| good	0.233 \| good	2.357 \| good	0.24 \| good
2025-07-27T09:00:00.000Z	42 \| good	5.991 \| good	44.808 \| good	20.377 \| good	0.23 \| good	2.248 \| good	0.24 \| good
2025-07-27T10:00:00.000Z	27 \| good	4.724 \| good	24.182 \| good	21.248 \| good	0.259 \| good	2.451 \| good	0.24 \| good
2025-07-27T11:00:00.000Z	36 \| good	6.114 \| good	39.281 \| good	22.988 \| good	0.202 \| good	2.812 \| good	0.255 \| good
2025-07-27T12:00:00.000Z	33 \| good	6.448 \| good	28.474 \| good	24.459 \| good	0.208 \| good	3.248 \| good	0.271 \| good
2025-07-27T13:00:00.000Z	38 \| good	7.111 \| good	31.433 \| good	27.109 \| good	0.164 \| good	3.418 \| good	0.255 \| good
2025-07-27T14:00:00.000Z	44 \| good	8.219 \| good	34.971 \| good	30.492 \| good	0.229 \| good	3.088 \| good	0.224 \| good
2025-07-27T15:00:00.000Z	49 \| good	8.97 \| good	38.383 \| good	32.656 \| good	0.263 \| good	2.279 \| good	0.246 \| good
2025-07-27T16:00:00.000Z	52 \| moderate	9.929 \| good	39.356 \| good	33.505 \| good	0.138 \| good	2.054 \| good	0.246 \| good
2025-07-27T17:00:00.000Z	49 \| good	9.077 \| good	39.557 \| good	33.916 \| good	0.343 \| good	2.19 \| good	0.224 \| good
2025-07-27T18:00:00.000Z	38 \| good	6.937 \| good	28.188 \| good	34.092 \| good	0.17 \| good	1.692 \| good	0.224 \| good
2025-07-27T19:00:00.000Z	31 \| good	3.4 \| good	14.017 \| good	34.244 \| good	0.114 \| good	1.817 \| good	0.224 \| good
2025-07-27T20:00:00.000Z	32 \| good	2.827 \| good	12.439 \| good	34.856 \| good	0.121 \| good	2.828 \| good	0.255 \| good
2025-07-27T21:00:00.000Z	31 \| good	3.104 \| good	13.91 \| good	34.456 \| good	0.218 \| good	3.952 \| good	0.256 \| good
2025-07-27T22:00:00.000Z	32 \| good	2.605 \| good	11.37 \| good	34.832 \| good	0.149 \| good	3.266 \| good	0.26 \| good
2025-07-27T23:00:00.000Z	28 \| good	2.444 \| good	9.715 \| good	30.41 \| good	0.17 \| good	6.084 \| good	0.309 \| good
2025-07-28T00:00:00.000Z	26 \| good	2.223 \| good	9.563 \| good	27.51 \| good	0.266 \| good	7.291 \| good	0.309 \| good
2025-07-28T00:00:00.000Z	25 \| good	3.618 \| good	16.338 \| good	27.469 \| good	0.275 \| good	6.384 \| good	0.32 \| good
2025-07-27T17:00:00.000Z	44 \| good	6.336 \| good	28.083 \| good	47.713 \| good	1.974 \| good	1.506 \| good	0.178 \| good
2025-07-27T18:00:00.000Z	44 \| good	6.523 \| good	29.026 \| good	47.805 \| good	1.961 \| good	1.289 \| good	0.165 \| good
2025-07-27T19:00:00.000Z	42 \| good	6.61 \| good	29.95 \| good	45.401 \| good	1.715 \| good	1.558 \| good	0.163 \| good
2025-07-27T20:00:00.000Z	39 \| good	4.704 \| good	20.068 \| good	41.845 \| good	1.469 \| good	1.828 \| good	0.161 \| good
2025-07-27T21:00:00.000Z	37 \| good	3.976 \| good	17.011 \| good	40.4 \| good	1.222 \| good	2.098 \| good	0.158 \| good
2025-07-27T22:00:00.000Z	40 \| good	3.209 \| good	13.943 \| good	42.617 \| good	1.156 \| good	3.74 \| good	0.173 \| good
2025-07-27T23:00:00.000Z	41 \| good	3.72 \| good	15.942 \| good	44.408 \| good	1.089 \| good	5.382 \| good	0.188 \| good
2025-07-28T00:00:00.000Z	36 \| good	2.031 \| good	8.081 \| good	38.989 \| good	1.022 \| good	7.025 \| good	0.203 \| good
2025-07-28T01:00:00.000Z	31 \| good	2.25 \| good	9.103 \| good	32.635 \| good	1.096 \| good	7.449 \| good	0.207 \| good
2025-07-28T02:00:00.000Z	25 \| good	3.036 \| good	12.103 \| good	27.403 \| good	1.17 \| good	7.873 \| good	0.211 \| good
2025-07-28T03:00:00.000Z	22 \| good	3.554 \| good	16.023 \| good	23.469 \| good	1.243 \| good	8.298 \| good	0.215 \| good
2025-07-28T04:00:00.000Z	17 \| good	3.142 \| good	14.052 \| good	18.4 \| good	1.602 \| good	7.063 \| good	0.205 \| good
2025-07-28T05:00:00.000Z	22 \| good	3.674 \| good	16.064 \| good	15.452 \| good	1.96 \| good	5.829 \| good	0.196 \| good
2025-07-28T06:00:00.000Z	22 \| good	3.874 \| good	17.047 \| good	13.635 \| good	2.318 \| good	4.594 \| good	0.187 \| good
2025-07-28T07:00:00.000Z	27 \| good	4.81 \| good	21.02 \| good	10.166 \| good	2.49 \| good	4.293 \| good	0.186 \| good
2025-07-28T08:00:00.000Z	33 \| good	6.476 \| good	28.965 \| good	9.129 \| good	2.663 \| good	3.992 \| good	0.185 \| good
2025-07-28T09:00:00.000Z	33 \| good	5.761 \| good	24.996 \| good	7.844 \| good	2.835 \| good	3.691 \| good	0.184 \| good
2025-07-28T10:00:00.000Z	27 \| good	5.113 \| good	21.961 \| good	10.021 \| good	2.704 \| good	3.77 \| good	0.191 \| good
2025-07-28T11:00:00.000Z	27 \| good	5.129 \| good	22.024 \| good	12.141 \| good	2.574 \| good	3.848 \| good	0.198 \| good
2025-07-28T12:00:00.000Z	38 \| good	7.202 \| good	31.96 \| good	21.093 \| good	2.443 \| good	3.927 \| good	0.206 \| good
2025-07-28T13:00:00.000Z	38 \| good	6.812 \| good	30.057 \| good	33.659 \| good	2.413 \| good	3.24 \| good	0.212 \| good
2025-07-28T14:00:00.000Z	44 \| good	8.015 \| good	35.052 \| good	45.778 \| good	2.382 \| good	2.553 \| good	0.218 \| good
2025-07-28T15:00:00.000Z	49 \| good	8.978 \| good	39.127 \| good	51.361 \| good	2.352 \| good	1.866 \| good	0.224 \| good
2025-07-28T16:00:00.000Z	52 \| moderate	9.831 \| good	44 \| good	53.857 \| good	2.121 \| good	1.664 \| good	0.216 \| good
2025-07-28T17:00:00.000Z	52 \| moderate	10.024 \| good	45.059 \| good	55.452 \| fine	1.891 \| good	1.461 \| good	0.208 \| good
2025-07-28T18:00:00.000Z	54 \| moderate	10.862 \| good	48.028 \| good	55.293 \| fine	1.66 \| good	1.259 \| good	0.2 \| good
2025-07-28T19:00:00.000Z	54 \| moderate	11.384 \| good	49.988 \| good	53.072 \| good	1.571 \| good	1.399 \| good	0.197 \| good
2025-07-28T20:00:00.000Z	52 \| moderate	10.243 \| good	45.044 \| good	49.761 \| good	1.483 \| good	1.54 \| good	0.195 \| good
2025-07-28T21:00:00.000Z	49 \| good	9.459 \| good	42.058 \| good	47.963 \| good	1.395 \| good	1.681 \| good	0.192 \| good
2025-07-28T22:00:00.000Z	49 \| good	9.142 \| good	41.033 \| good	47.312 \| good	1.402 \| good	5.133 \| good	0.227 \| good
2025-07-28T23:00:00.000Z	52 \| moderate	10.17 \| good	45.037 \| good	43.096 \| good	1.409 \| good	8.585 \| good	0.262 \| good
2025-07-29T00:00:00.000Z	52 \| moderate	10.127 \| good	44.997 \| good	39.985 \| good	1.417 \| good	12.037 \| good	0.296 \| good
2025-07-29T01:00:00.000Z	52 \| moderate	10.336 \| good	46.041 \| good	35.373 \| good	1.445 \| good	14.468 \| good	0.324 \| good
2025-07-29T02:00:00.000Z	56 \| moderate	12.356 \| fine	54.978 \| good	30.17 \| good	1.473 \| good	16.899 \| good	0.352 \| good
2025-07-29T03:00:00.000Z	58 \| moderate	12.751 \| fine	56.972 \| fine	24.987 \| good	1.502 \| good	19.33 \| good	0.38 \| good
2025-07-29T04:00:00.000Z	58 \| moderate	12.871 \| fine	57.063 \| fine	21.121 \| good	1.505 \| good	18.906 \| good	0.381 \| good
2025-07-29T05:00:00.000Z	60 \| moderate	13.66 \| fine	60.94 \| fine	16.851 \| good	1.508 \| good	18.483 \| good	0.381 \| good
2025-07-29T06:00:00.000Z	60 \| moderate	14.222 \| fine	62.998 \| fine	12.733 \| good	1.511 \| good	18.059 \| good	0.382 \| good
2025-07-29T07:00:00.000Z	62 \| moderate	15.418 \| fine	68.865 \| fine	8.738 \| good	1.563 \| good	17.879 \| good	0.383 \| good
2025-07-29T08:00:00.000Z	66 \| moderate	16.68 \| fine	74.753 \| fine	8.597 \| good	1.616 \| good	17.698 \| good	0.384 \| good
2025-07-29T09:00:00.000Z	66 \| moderate	17.012 \| fine	74.885 \| fine	12.833 \| good	1.668 \| good	17.517 \| good	0.385 \| good
2025-07-29T10:00:00.000Z	66 \| moderate	16.914 \| fine	74.829 \| fine	13.7 \| good	1.65 \| good	16.355 \| good	0.4 \| good
2025-07-29T11:00:00.000Z	69 \| moderate	18.838 \| fine	82.842 \| fine	11.125 \| good	1.632 \| good	15.193 \| good	0.415 \| good
2025-07-29T12:00:00.000Z	69 \| moderate	19.481 \| fine	86.743 \| fine	20.883 \| good	1.613 \| good	14.03 \| good	0.43 \| good
2025-07-29T13:00:00.000Z	67 \| moderate	18.369 \| fine	80.877 \| fine	36.032 \| good	1.787 \| good	10.209 \| good	0.364 \| good
2025-07-29T14:00:00.000Z	66 \| moderate	17.338 \| fine	76.88 \| fine	49.73 \| good	1.961 \| good	6.387 \| good	0.298 \| good
2025-07-29T15:00:00.000Z	60 \| moderate	14.113 \| fine	63.005 \| fine	55.613 \| fine	2.135 \| good	2.566 \| good	0.233 \| good
2025-07-29T16:00:00.000Z	67 \| moderate	12.772 \| fine	56.981 \| fine	60.208 \| fine	1.947 \| good	2.165 \| good	0.221 \| good

Colesville

Empower business decisions with accurate air quality data

Colesville, Maryland air quality map: Real-time AQI near you

0.27ppm

How accurate is Maryland, USA air quality data?

Air quality measurements for Maryland, 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.

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Frequently asked questions

How frequently is the air quality data for Colesville, Maryland updated?

Air quality data for Colesville, Maryland is updated on an hourly basis.

When did Colesville, Maryland experience the worst air quality in the last 24 hours?

The worst air quality in Colesville, Maryland was recorded at 09:00:00 on 2025-07-27.

When did Colesville, Maryland have its best air quality in the last 24 hours?

The best air quality in Colesville, Maryland was recorded at 04:00:00 on 2025-07-26.

What is the real-time air quality index for Colesville, Maryland?

The real-time air quality index in Colesville, Maryland is 54, currently categorized as Moderate.

Which pollutant is found most often in Colesville, Maryland?

The most common pollutant in Colesville, Maryland is PM2.5.

What can I do if the air quality in Colesville, Maryland is poor?

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

What are the current PM_2.5 levels in Colesville, Maryland?

The measured PM_2.5 levels in Colesville, Maryland at present are 11.274 μg/m³.

What are the current PM₁₀ levels at Colesville, Maryland?

The current PM₁₀ levels in Colesville, Maryland are 39.599 μg/m³.

What are the current carbon monoxide (CO) levels at Colesville, Maryland?

The current carbon monoxide (CO) level in Colesville, Maryland is 0.259 ppm.

What are the current sulfur dioxide (SO₂) levels at Colesville, Maryland?

The current sulfur dioxide (SO₂) levels in Colesville, Maryland are 0.134 ppb.

What are the current ozone (O₃) levels at Colesville, Maryland?

The current ozone (O₃) levels at Colesville, Maryland is 36.869 ppm.

What are the current nitrogen dioxide (NO₂) levels at Colesville, Maryland?

The current nitrogen dioxide (NO₂) levels at Colesville, Maryland is 1.714 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-26T01:00:00.000Z	33 \| good	6.413 \| good	27.819 \| good	34.742 \| good	0.174 \| good	4.208 \| good	0.224 \| good
2025-07-26T02:00:00.000Z	32 \| good	4.32 \| good	17.799 \| good	34.505 \| good	0.159 \| good	4.493 \| good	0.24 \| good
2025-07-26T03:00:00.000Z	28 \| good	3.873 \| good	17.159 \| good	30.218 \| good	0.118 \| good	5.355 \| good	0.24 \| good
2025-07-26T04:00:00.000Z	23 \| good	3.725 \| good	15.972 \| good	25.155 \| good	0.162 \| good	5.763 \| good	0.287 \| good
2025-07-26T05:00:00.000Z	22 \| good	3.826 \| good	18.681 \| good	22.635 \| good	0.195 \| good	9.065 \| good	0.319 \| good
2025-07-26T06:00:00.000Z	22 \| good	3.672 \| good	14.695 \| good	19.178 \| good	0.176 \| good	9.2 \| good	0.319 \| good
2025-07-26T07:00:00.000Z	16 \| good	3.317 \| good	12.853 \| good	15.512 \| good	0.133 \| good	8.602 \| good	0.287 \| good
2025-07-26T08:00:00.000Z	22 \| good	3.644 \| good	13.142 \| good	11.805 \| good	0.144 \| good	7.741 \| good	0.302 \| good
2025-07-26T09:00:00.000Z	27 \| good	4.511 \| good	19.217 \| good	9.539 \| good	0.126 \| good	6.754 \| good	0.285 \| good
2025-07-26T10:00:00.000Z	27 \| good	4.857 \| good	21.547 \| good	9.182 \| good	0.123 \| good	6.679 \| good	0.302 \| good
2025-07-26T11:00:00.000Z	27 \| good	5.297 \| good	22.942 \| good	9.183 \| good	0.157 \| good	7.757 \| good	0.288 \| good
2025-07-26T12:00:00.000Z	27 \| good	4.62 \| good	19.251 \| good	10.904 \| good	0.144 \| good	7.01 \| good	0.294 \| good
2025-07-26T13:00:00.000Z	33 \| good	5.859 \| good	23.909 \| good	16.377 \| good	0.166 \| good	5.405 \| good	0.262 \| good
2025-07-26T14:00:00.000Z	33 \| good	5.706 \| good	24.106 \| good	24.199 \| good	0.141 \| good	4.876 \| good	0.247 \| good
2025-07-26T15:00:00.000Z	33 \| good	5.588 \| good	23.092 \| good	28.796 \| good	0.284 \| good	5.146 \| good	0.24 \| good
2025-07-26T16:00:00.000Z	32 \| good	5.059 \| good	21.143 \| good	35.494 \| good	0.32 \| good	4.608 \| good	0.24 \| good
2025-07-26T17:00:00.000Z	38 \| good	5.051 \| good	21.094 \| good	41.398 \| good	0.175 \| good	3.282 \| good	0.224 \| good
2025-07-26T18:00:00.000Z	42 \| good	5.057 \| good	20.833 \| good	45.351 \| good	0.219 \| good	2.693 \| good	0.224 \| good
2025-07-26T19:00:00.000Z	44 \| good	5.374 \| good	22.836 \| good	46.615 \| good	0.119 \| good	2.881 \| good	0.224 \| good
2025-07-26T20:00:00.000Z	43 \| good	5.279 \| good	24.392 \| good	46.023 \| good	0.129 \| good	2.437 \| good	0.255 \| good
2025-07-26T21:00:00.000Z	40 \| good	5.328 \| good	23.15 \| good	42.716 \| good	0.274 \| good	1.965 \| good	0.255 \| good
2025-07-26T22:00:00.000Z	38 \| good	4.938 \| good	22.192 \| good	40.893 \| good	0.196 \| good	2.669 \| good	0.255 \| good
2025-07-26T23:00:00.000Z	36 \| good	4.885 \| good	21.016 \| good	38.803 \| good	0.124 \| good	3.295 \| good	0.255 \| good
2025-07-27T00:00:00.000Z	35 \| good	6.003 \| good	25.022 \| good	38.116 \| good	0.15 \| good	3.668 \| good	0.286 \| good
2025-07-27T01:00:00.000Z	35 \| good	5.953 \| good	27.615 \| good	37.815 \| good	0.213 \| good	3.259 \| good	0.325 \| good
2025-07-27T02:00:00.000Z	44 \| good	7.506 \| good	32.763 \| good	35.993 \| good	0.157 \| good	3.989 \| good	0.294 \| good
2025-07-27T03:00:00.000Z	49 \| good	8.799 \| good	35.447 \| good	32.045 \| good	0.175 \| good	4.622 \| good	0.294 \| good
2025-07-27T04:00:00.000Z	44 \| good	8.091 \| good	34.206 \| good	30.286 \| good	0.19 \| good	3.247 \| good	0.278 \| good
2025-07-27T05:00:00.000Z	38 \| good	7.303 \| good	31.174 \| good	28.944 \| good	0.247 \| good	2.801 \| good	0.325 \| good
2025-07-27T06:00:00.000Z	49 \| good	9.154 \| good	44.727 \| good	24.234 \| good	0.179 \| good	2.482 \| good	0.294 \| good
2025-07-27T07:00:00.000Z	44 \| good	7.914 \| good	34.536 \| good	26.031 \| good	0.152 \| good	2.086 \| good	0.24 \| good
2025-07-27T08:00:00.000Z	42 \| good	5.685 \| good	45.025 \| good	22.301 \| good	0.233 \| good	2.357 \| good	0.24 \| good
2025-07-27T09:00:00.000Z	42 \| good	5.991 \| good	44.808 \| good	20.377 \| good	0.23 \| good	2.248 \| good	0.24 \| good
2025-07-27T10:00:00.000Z	27 \| good	4.724 \| good	24.182 \| good	21.248 \| good	0.259 \| good	2.451 \| good	0.24 \| good
2025-07-27T11:00:00.000Z	36 \| good	6.114 \| good	39.281 \| good	22.988 \| good	0.202 \| good	2.812 \| good	0.255 \| good
2025-07-27T12:00:00.000Z	33 \| good	6.448 \| good	28.474 \| good	24.459 \| good	0.208 \| good	3.248 \| good	0.271 \| good
2025-07-27T13:00:00.000Z	38 \| good	7.111 \| good	31.433 \| good	27.109 \| good	0.164 \| good	3.418 \| good	0.255 \| good
2025-07-27T14:00:00.000Z	44 \| good	8.219 \| good	34.971 \| good	30.492 \| good	0.229 \| good	3.088 \| good	0.224 \| good
2025-07-27T15:00:00.000Z	49 \| good	8.97 \| good	38.383 \| good	32.656 \| good	0.263 \| good	2.279 \| good	0.246 \| good
2025-07-27T16:00:00.000Z	52 \| moderate	9.929 \| good	39.356 \| good	33.505 \| good	0.138 \| good	2.054 \| good	0.246 \| good
2025-07-27T17:00:00.000Z	49 \| good	9.077 \| good	39.557 \| good	33.916 \| good	0.343 \| good	2.19 \| good	0.224 \| good
2025-07-27T18:00:00.000Z	38 \| good	6.937 \| good	28.188 \| good	34.092 \| good	0.17 \| good	1.692 \| good	0.224 \| good
2025-07-27T19:00:00.000Z	31 \| good	3.4 \| good	14.017 \| good	34.244 \| good	0.114 \| good	1.817 \| good	0.224 \| good
2025-07-27T20:00:00.000Z	32 \| good	2.827 \| good	12.439 \| good	34.856 \| good	0.121 \| good	2.828 \| good	0.255 \| good
2025-07-27T21:00:00.000Z	31 \| good	3.104 \| good	13.91 \| good	34.456 \| good	0.218 \| good	3.952 \| good	0.256 \| good
2025-07-27T22:00:00.000Z	32 \| good	2.605 \| good	11.37 \| good	34.832 \| good	0.149 \| good	3.266 \| good	0.26 \| good
2025-07-27T23:00:00.000Z	28 \| good	2.444 \| good	9.715 \| good	30.41 \| good	0.17 \| good	6.084 \| good	0.309 \| good
2025-07-28T00:00:00.000Z	26 \| good	2.223 \| good	9.563 \| good	27.51 \| good	0.266 \| good	7.291 \| good	0.309 \| good
2025-07-28T00:00:00.000Z	25 \| good	3.618 \| good	16.338 \| good	27.469 \| good	0.275 \| good	6.384 \| good	0.32 \| good
2025-07-27T17:00:00.000Z	44 \| good	6.336 \| good	28.083 \| good	47.713 \| good	1.974 \| good	1.506 \| good	0.178 \| good
2025-07-27T18:00:00.000Z	44 \| good	6.523 \| good	29.026 \| good	47.805 \| good	1.961 \| good	1.289 \| good	0.165 \| good
2025-07-27T19:00:00.000Z	42 \| good	6.61 \| good	29.95 \| good	45.401 \| good	1.715 \| good	1.558 \| good	0.163 \| good
2025-07-27T20:00:00.000Z	39 \| good	4.704 \| good	20.068 \| good	41.845 \| good	1.469 \| good	1.828 \| good	0.161 \| good
2025-07-27T21:00:00.000Z	37 \| good	3.976 \| good	17.011 \| good	40.4 \| good	1.222 \| good	2.098 \| good	0.158 \| good
2025-07-27T22:00:00.000Z	40 \| good	3.209 \| good	13.943 \| good	42.617 \| good	1.156 \| good	3.74 \| good	0.173 \| good
2025-07-27T23:00:00.000Z	41 \| good	3.72 \| good	15.942 \| good	44.408 \| good	1.089 \| good	5.382 \| good	0.188 \| good
2025-07-28T00:00:00.000Z	36 \| good	2.031 \| good	8.081 \| good	38.989 \| good	1.022 \| good	7.025 \| good	0.203 \| good
2025-07-28T01:00:00.000Z	31 \| good	2.25 \| good	9.103 \| good	32.635 \| good	1.096 \| good	7.449 \| good	0.207 \| good
2025-07-28T02:00:00.000Z	25 \| good	3.036 \| good	12.103 \| good	27.403 \| good	1.17 \| good	7.873 \| good	0.211 \| good
2025-07-28T03:00:00.000Z	22 \| good	3.554 \| good	16.023 \| good	23.469 \| good	1.243 \| good	8.298 \| good	0.215 \| good
2025-07-28T04:00:00.000Z	17 \| good	3.142 \| good	14.052 \| good	18.4 \| good	1.602 \| good	7.063 \| good	0.205 \| good
2025-07-28T05:00:00.000Z	22 \| good	3.674 \| good	16.064 \| good	15.452 \| good	1.96 \| good	5.829 \| good	0.196 \| good
2025-07-28T06:00:00.000Z	22 \| good	3.874 \| good	17.047 \| good	13.635 \| good	2.318 \| good	4.594 \| good	0.187 \| good
2025-07-28T07:00:00.000Z	27 \| good	4.81 \| good	21.02 \| good	10.166 \| good	2.49 \| good	4.293 \| good	0.186 \| good
2025-07-28T08:00:00.000Z	33 \| good	6.476 \| good	28.965 \| good	9.129 \| good	2.663 \| good	3.992 \| good	0.185 \| good
2025-07-28T09:00:00.000Z	33 \| good	5.761 \| good	24.996 \| good	7.844 \| good	2.835 \| good	3.691 \| good	0.184 \| good
2025-07-28T10:00:00.000Z	27 \| good	5.113 \| good	21.961 \| good	10.021 \| good	2.704 \| good	3.77 \| good	0.191 \| good
2025-07-28T11:00:00.000Z	27 \| good	5.129 \| good	22.024 \| good	12.141 \| good	2.574 \| good	3.848 \| good	0.198 \| good
2025-07-28T12:00:00.000Z	38 \| good	7.202 \| good	31.96 \| good	21.093 \| good	2.443 \| good	3.927 \| good	0.206 \| good
2025-07-28T13:00:00.000Z	38 \| good	6.812 \| good	30.057 \| good	33.659 \| good	2.413 \| good	3.24 \| good	0.212 \| good
2025-07-28T14:00:00.000Z	44 \| good	8.015 \| good	35.052 \| good	45.778 \| good	2.382 \| good	2.553 \| good	0.218 \| good
2025-07-28T15:00:00.000Z	49 \| good	8.978 \| good	39.127 \| good	51.361 \| good	2.352 \| good	1.866 \| good	0.224 \| good
2025-07-28T16:00:00.000Z	52 \| moderate	9.831 \| good	44 \| good	53.857 \| good	2.121 \| good	1.664 \| good	0.216 \| good
2025-07-28T17:00:00.000Z	52 \| moderate	10.024 \| good	45.059 \| good	55.452 \| fine	1.891 \| good	1.461 \| good	0.208 \| good
2025-07-28T18:00:00.000Z	54 \| moderate	10.862 \| good	48.028 \| good	55.293 \| fine	1.66 \| good	1.259 \| good	0.2 \| good
2025-07-28T19:00:00.000Z	54 \| moderate	11.384 \| good	49.988 \| good	53.072 \| good	1.571 \| good	1.399 \| good	0.197 \| good
2025-07-28T20:00:00.000Z	52 \| moderate	10.243 \| good	45.044 \| good	49.761 \| good	1.483 \| good	1.54 \| good	0.195 \| good
2025-07-28T21:00:00.000Z	49 \| good	9.459 \| good	42.058 \| good	47.963 \| good	1.395 \| good	1.681 \| good	0.192 \| good
2025-07-28T22:00:00.000Z	49 \| good	9.142 \| good	41.033 \| good	47.312 \| good	1.402 \| good	5.133 \| good	0.227 \| good
2025-07-28T23:00:00.000Z	52 \| moderate	10.17 \| good	45.037 \| good	43.096 \| good	1.409 \| good	8.585 \| good	0.262 \| good
2025-07-29T00:00:00.000Z	52 \| moderate	10.127 \| good	44.997 \| good	39.985 \| good	1.417 \| good	12.037 \| good	0.296 \| good
2025-07-29T01:00:00.000Z	52 \| moderate	10.336 \| good	46.041 \| good	35.373 \| good	1.445 \| good	14.468 \| good	0.324 \| good
2025-07-29T02:00:00.000Z	56 \| moderate	12.356 \| fine	54.978 \| good	30.17 \| good	1.473 \| good	16.899 \| good	0.352 \| good
2025-07-29T03:00:00.000Z	58 \| moderate	12.751 \| fine	56.972 \| fine	24.987 \| good	1.502 \| good	19.33 \| good	0.38 \| good
2025-07-29T04:00:00.000Z	58 \| moderate	12.871 \| fine	57.063 \| fine	21.121 \| good	1.505 \| good	18.906 \| good	0.381 \| good
2025-07-29T05:00:00.000Z	60 \| moderate	13.66 \| fine	60.94 \| fine	16.851 \| good	1.508 \| good	18.483 \| good	0.381 \| good
2025-07-29T06:00:00.000Z	60 \| moderate	14.222 \| fine	62.998 \| fine	12.733 \| good	1.511 \| good	18.059 \| good	0.382 \| good
2025-07-29T07:00:00.000Z	62 \| moderate	15.418 \| fine	68.865 \| fine	8.738 \| good	1.563 \| good	17.879 \| good	0.383 \| good
2025-07-29T08:00:00.000Z	66 \| moderate	16.68 \| fine	74.753 \| fine	8.597 \| good	1.616 \| good	17.698 \| good	0.384 \| good
2025-07-29T09:00:00.000Z	66 \| moderate	17.012 \| fine	74.885 \| fine	12.833 \| good	1.668 \| good	17.517 \| good	0.385 \| good
2025-07-29T10:00:00.000Z	66 \| moderate	16.914 \| fine	74.829 \| fine	13.7 \| good	1.65 \| good	16.355 \| good	0.4 \| good
2025-07-29T11:00:00.000Z	69 \| moderate	18.838 \| fine	82.842 \| fine	11.125 \| good	1.632 \| good	15.193 \| good	0.415 \| good
2025-07-29T12:00:00.000Z	69 \| moderate	19.481 \| fine	86.743 \| fine	20.883 \| good	1.613 \| good	14.03 \| good	0.43 \| good
2025-07-29T13:00:00.000Z	67 \| moderate	18.369 \| fine	80.877 \| fine	36.032 \| good	1.787 \| good	10.209 \| good	0.364 \| good
2025-07-29T14:00:00.000Z	66 \| moderate	17.338 \| fine	76.88 \| fine	49.73 \| good	1.961 \| good	6.387 \| good	0.298 \| good
2025-07-29T15:00:00.000Z	60 \| moderate	14.113 \| fine	63.005 \| fine	55.613 \| fine	2.135 \| good	2.566 \| good	0.233 \| good
2025-07-29T16:00:00.000Z	67 \| moderate	12.772 \| fine	56.981 \| fine	60.208 \| fine	1.947 \| good	2.165 \| good	0.221 \| good

Real-time air quality index in Colesville, Maryland today

Common air pollutants in Colesville, Maryland

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Colesville, Maryland air quality forecast and history

Empower business decisions with accurate air quality data

Colesville, Maryland air quality map: Real-time AQI near you

Air quality in nearby cities

Cloverly, Maryland

Fairland, Maryland

White Oak, Maryland

Kemp Mill, Maryland

Glenmont, Maryland

Wheaton, Maryland

How accurate is Maryland, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Colesville, Maryland updated?

When did Colesville, Maryland experience the worst air quality in the last 24 hours?

When did Colesville, Maryland have its best air quality in the last 24 hours?

What is the real-time air quality index for Colesville, Maryland?

Which pollutant is found most often in Colesville, Maryland?

What can I do if the air quality in Colesville, Maryland is poor?

What are the current PM2.5 levels in Colesville, Maryland?

What are the current PM10 levels at Colesville, Maryland?

What are the current carbon monoxide (CO) levels at Colesville, Maryland?

What are the current sulfur dioxide (SO2) levels at Colesville, Maryland?

What are the current ozone (O3) levels at Colesville, Maryland?

What are the current nitrogen dioxide (NO2) levels at Colesville, Maryland?

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 Colesville, Maryland?

What are the current PM₁₀ levels at Colesville, Maryland?

What are the current sulfur dioxide (SO₂) levels at Colesville, Maryland?

What are the current ozone (O₃) levels at Colesville, Maryland?

What are the current nitrogen dioxide (NO₂) levels at Colesville, Maryland?