What is the current level of PM10 in Gaithersburg, Maryland?

Gaithersburg, Maryland currently has a PM10 concentration of 11.084 μg/m3.

What is the current level of sulfur dioxide (SO2) in Gaithersburg, Maryland?

The current sulfur dioxide (SO2) concentration in Gaithersburg, Maryland is 0.295 ppb.

What is the current level of ozone (O3) in Gaithersburg, Maryland?

Gaithersburg, Maryland currently has an ozone (O3) concentration of 34.159 ppm.

What is the current level of nitrogen dioxide (NO2) in Gaithersburg, Maryland?

The current level of nitrogen dioxide (NO2) in Gaithersburg, Maryland is 4.744 ppb.

Current air quality index in Gaithersburg, Maryland today

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

Stay updated with real-time air quality in Gaithersburg, 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

Gaithersburg, Maryland

Last updated: ... (Local time)

Common air pollutants in Gaithersburg, Maryland

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.89 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

11.08 μg/m³

155

255

425

605+

Ozone (O₃)

34.16 ppb

201

201+

Sulfur Dioxide (SO₂)

0.29 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.74 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Gaithersburg, Maryland

Get Live Pollen Counts

Gaithersburg, Maryland

Scroll To Air Quality Map

Track live Gaithersburg, Maryland air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-19T21:00:00.000Z	44 \| good	8.453 \| good	33.445 \| good	44.685 \| good	0.256 \| good	2.203 \| good	0.185 \| good
2025-10-19T22:00:00.000Z	44 \| good	7.785 \| good	30.943 \| good	45.651 \| good	0.265 \| good	2.56 \| good	0.185 \| good
2025-10-19T23:00:00.000Z	34 \| good	4.94 \| good	16.256 \| good	36.633 \| good	0.282 \| good	2.584 \| good	0.185 \| good
2025-10-20T00:00:00.000Z	33 \| good	4.674 \| good	21.699 \| good	35.812 \| good	0.252 \| good	2.96 \| good	0.185 \| good
2025-10-20T01:00:00.000Z	37 \| good	4.902 \| good	20.768 \| good	39.785 \| good	0.216 \| good	3.383 \| good	0.204 \| good
2025-10-20T02:00:00.000Z	36 \| good	4.31 \| good	17.777 \| good	38.854 \| good	0.228 \| good	2.513 \| good	0.204 \| good
2025-10-20T03:00:00.000Z	35 \| good	4.089 \| good	14.651 \| good	37.872 \| good	0.208 \| good	2.38 \| good	0.153 \| good
2025-10-20T04:00:00.000Z	35 \| good	3.388 \| good	13.943 \| good	37.906 \| good	0.182 \| good	1.996 \| good	0.153 \| good
2025-10-20T05:00:00.000Z	33 \| good	2.519 \| good	7.902 \| good	36.301 \| good	0.211 \| good	2.119 \| good	0.153 \| good
2025-10-20T06:00:00.000Z	31 \| good	2.188 \| good	7.49 \| good	33.153 \| good	0.143 \| good	2.354 \| good	0.153 \| good
2025-10-20T07:00:00.000Z	30 \| good	1.916 \| good	6.58 \| good	31.789 \| good	0.164 \| good	1.856 \| good	0.153 \| good
2025-10-20T08:00:00.000Z	23 \| good	1.666 \| good	8.569 \| good	25.433 \| good	0.147 \| good	1.873 \| good	0.153 \| good
2025-10-20T09:00:00.000Z	22 \| good	1.94 \| good	7.665 \| good	23.756 \| good	0.164 \| good	2.552 \| good	0.174 \| good
2025-10-20T10:00:00.000Z	24 \| good	1.568 \| good	5.393 \| good	25.749 \| good	0.167 \| good	2.675 \| good	0.153 \| good
2025-10-20T11:00:00.000Z	23 \| good	1.848 \| good	8.265 \| good	25.201 \| good	0.168 \| good	3.586 \| good	0.147 \| good
2025-10-20T12:00:00.000Z	24 \| good	1.428 \| good	5.042 \| good	25.546 \| good	0.184 \| good	3.879 \| good	0.124 \| good
2025-10-20T13:00:00.000Z	21 \| good	1.322 \| good	5.89 \| good	22.695 \| good	0.158 \| good	5.097 \| good	0.166 \| good
2025-10-20T14:00:00.000Z	23 \| good	3.605 \| good	19.024 \| good	25.363 \| good	0.178 \| good	4.936 \| good	0.185 \| good
2025-10-20T15:00:00.000Z	25 \| good	3.692 \| good	14.006 \| good	27.309 \| good	0.22 \| good	2.926 \| good	0.142 \| good
2025-10-20T16:00:00.000Z	28 \| good	3.046 \| good	13.537 \| good	29.782 \| good	0.237 \| good	1.913 \| good	0.124 \| good
2025-10-20T17:00:00.000Z	29 \| good	2.882 \| good	12.772 \| good	30.976 \| good	0.197 \| good	1.902 \| good	0.143 \| good
2025-10-20T18:00:00.000Z	29 \| good	2.514 \| good	11.436 \| good	30.607 \| good	0.186 \| good	1.675 \| good	0.142 \| good
2025-10-20T19:00:00.000Z	29 \| good	2.832 \| good	11.605 \| good	31.234 \| good	0.175 \| good	1.631 \| good	0.142 \| good
2025-10-20T20:00:00.000Z	30 \| good	2.83 \| good	10.927 \| good	32.195 \| good	0.183 \| good	1.7 \| good	0.142 \| good
2025-10-20T21:00:00.000Z	30 \| good	2.022 \| good	7.74 \| good	31.544 \| good	0.147 \| good	1.901 \| good	0.142 \| good
2025-10-20T22:00:00.000Z	29 \| good	2.143 \| good	9.661 \| good	31.362 \| good	0.169 \| good	4.462 \| good	0.142 \| good
2025-10-20T23:00:00.000Z	28 \| good	1.637 \| good	7.288 \| good	30.004 \| good	0.175 \| good	7.848 \| good	0.142 \| good
2025-10-21T00:00:00.000Z	27 \| good	1.126 \| good	2.493 \| good	29.051 \| good	0.153 \| good	9.412 \| good	0.142 \| good
2025-10-21T01:00:00.000Z	25 \| good	2.339 \| good	7.79 \| good	26.719 \| good	0.175 \| good	14.164 \| good	0.181 \| good
2025-10-21T02:00:00.000Z	22 \| good	3.536 \| good	14.174 \| good	23.394 \| good	0.151 \| good	14.429 \| good	0.261 \| good
2025-10-21T03:00:00.000Z	38 \| good	6.731 \| good	29.743 \| good	15.654 \| good	1.823 \| good	14.833 \| good	0.218 \| good
2025-10-21T04:00:00.000Z	49 \| good	9.083 \| good	14.486 \| good	15.783 \| good	0.2 \| good	14.617 \| good	0.337 \| good
2025-10-21T05:00:00.000Z	22 \| good	4.373 \| good	20.237 \| good	12.007 \| good	0.189 \| good	14.728 \| good	0.361 \| good
2025-10-21T06:00:00.000Z	22 \| good	4.202 \| good	20.98 \| good	4.7 \| good	0.18 \| good	12.089 \| good	0.365 \| good
2025-10-21T07:00:00.000Z	27 \| good	4.544 \| good	21.051 \| good	7.402 \| good	0.207 \| good	13.113 \| good	0.342 \| good
2025-10-21T08:00:00.000Z	22 \| good	3.789 \| good	17.114 \| good	4.064 \| good	0.251 \| good	11.19 \| good	0.342 \| good
2025-10-21T09:00:00.000Z	27 \| good	4.654 \| good	23.826 \| good	5.136 \| good	0.256 \| good	11.288 \| good	0.342 \| good
2025-10-21T10:00:00.000Z	27 \| good	5.224 \| good	25.735 \| good	3.002 \| good	0.362 \| good	15.013 \| good	0.342 \| good
2025-10-21T11:00:00.000Z	49 \| good	8.531 \| good	16.136 \| good	3.797 \| good	0.366 \| good	15.03 \| good	0.365 \| good
2025-10-21T12:00:00.000Z	58 \| moderate	12.807 \| fine	27.204 \| good	3.142 \| good	0.46 \| good	15.334 \| good	0.532 \| good
2025-10-21T13:00:00.000Z	33 \| good	6.357 \| good	30.116 \| good	3.275 \| good	0.463 \| good	16.981 \| good	0.636 \| good
2025-10-21T14:00:00.000Z	27 \| good	4.591 \| good	21.868 \| good	4.579 \| good	0.365 \| good	16.811 \| good	0.67 \| good
2025-10-21T15:00:00.000Z	22 \| good	3.995 \| good	16.157 \| good	12.724 \| good	0.317 \| good	15.615 \| good	0.517 \| good
2025-10-21T16:00:00.000Z	33 \| good	5.855 \| good	22.733 \| good	17.652 \| good	0.318 \| good	10.378 \| good	0.284 \| good
2025-10-21T17:00:00.000Z	27 \| good	4.702 \| good	17.43 \| good	22.041 \| good	0.3 \| good	6.443 \| good	0.182 \| good
2025-10-21T18:00:00.000Z	26 \| good	3.586 \| good	18.175 \| good	27.513 \| good	0.284 \| good	5.474 \| good	0.16 \| good
2025-10-21T19:00:00.000Z	28 \| good	3.223 \| good	14.929 \| good	30.033 \| good	0.265 \| good	5.397 \| good	0.16 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.892 \| good	11.084 \| good	34.159 \| good	0.295 \| good	4.744 \| good	0.182 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.892 \| good	11.084 \| good	34.159 \| good	0.295 \| good	4.744 \| good	0.182 \| good
2025-10-21T21:00:00.000Z	40 \| good	5.694 \| good	24.902 \| good	42.542 \| good	1.544 \| good	4.287 \| good	0.168 \| good
2025-10-21T22:00:00.000Z	38 \| good	6.766 \| good	29.919 \| good	37.636 \| good	1.693 \| good	8.33 \| good	0.199 \| good
2025-10-21T23:00:00.000Z	33 \| good	5.678 \| good	24.377 \| good	28.727 \| good	1.842 \| good	12.374 \| good	0.229 \| good
2025-10-22T00:00:00.000Z	33 \| good	5.877 \| good	25.362 \| good	27.264 \| good	1.991 \| good	16.418 \| good	0.259 \| good
2025-10-22T01:00:00.000Z	27 \| good	5.371 \| good	23.129 \| good	24.692 \| good	1.808 \| good	15.187 \| good	0.248 \| good
2025-10-22T02:00:00.000Z	27 \| good	5.129 \| good	22.514 \| good	24.008 \| good	1.624 \| good	13.957 \| good	0.237 \| good
2025-10-22T03:00:00.000Z	33 \| good	5.722 \| good	25.077 \| good	23.343 \| good	1.441 \| good	12.726 \| good	0.226 \| good
2025-10-22T04:00:00.000Z	33 \| good	5.519 \| good	24.087 \| good	18.49 \| good	1.356 \| good	10.04 \| good	0.206 \| good
2025-10-22T05:00:00.000Z	27 \| good	4.935 \| good	21.573 \| good	20.663 \| good	1.271 \| good	7.353 \| good	0.187 \| good
2025-10-22T06:00:00.000Z	27 \| good	5.166 \| good	22.318 \| good	23.07 \| good	1.186 \| good	4.667 \| good	0.167 \| good
2025-10-22T07:00:00.000Z	23 \| good	4.458 \| good	19.127 \| good	24.577 \| good	1.803 \| good	3.965 \| good	0.157 \| good
2025-10-22T08:00:00.000Z	22 \| good	4.455 \| good	19.166 \| good	23.268 \| good	2.421 \| good	3.263 \| good	0.148 \| good
2025-10-22T09:00:00.000Z	22 \| good	4.144 \| good	18.133 \| good	21.864 \| good	3.039 \| good	2.562 \| good	0.138 \| good
2025-10-22T10:00:00.000Z	18 \| good	2.883 \| good	12.061 \| good	18.759 \| good	3.088 \| good	3.425 \| good	0.142 \| good
2025-10-22T11:00:00.000Z	13 \| good	2.477 \| good	9.997 \| good	13.741 \| good	3.137 \| good	4.288 \| good	0.146 \| good
2025-10-22T12:00:00.000Z	22 \| good	3.891 \| good	16.929 \| good	17.321 \| good	3.186 \| good	5.151 \| good	0.151 \| good
2025-10-22T13:00:00.000Z	22 \| good	3.82 \| good	16.429 \| good	23.573 \| good	3.15 \| good	4.172 \| good	0.145 \| good
2025-10-22T14:00:00.000Z	30 \| good	3.316 \| good	14.731 \| good	31.526 \| good	3.115 \| good	3.192 \| good	0.139 \| good
2025-10-22T15:00:00.000Z	31 \| good	3.238 \| good	13.987 \| good	32.962 \| good	3.08 \| good	2.213 \| good	0.134 \| good
2025-10-22T16:00:00.000Z	31 \| good	2.922 \| good	12 \| good	33.803 \| good	2.749 \| good	2.009 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	33 \| good	2.468 \| good	10 \| good	35.542 \| good	2.417 \| good	1.805 \| good	0.129 \| good
2025-10-22T18:00:00.000Z	33 \| good	3.427 \| good	15.049 \| good	35.558 \| good	2.086 \| good	1.601 \| good	0.127 \| good
2025-10-22T19:00:00.000Z	31 \| good	2.578 \| good	10.167 \| good	34.142 \| good	1.968 \| good	2.107 \| good	0.13 \| good
2025-10-22T20:00:00.000Z	32 \| good	3.04 \| good	12.15 \| good	35.022 \| good	1.85 \| good	2.614 \| good	0.134 \| good
2025-10-22T21:00:00.000Z	31 \| good	2.893 \| good	11.979 \| good	34.289 \| good	1.732 \| good	3.121 \| good	0.137 \| good
2025-10-22T22:00:00.000Z	30 \| good	2.578 \| good	10.145 \| good	31.739 \| good	1.788 \| good	4.523 \| good	0.147 \| good
2025-10-22T23:00:00.000Z	26 \| good	2.534 \| good	10.104 \| good	28.435 \| good	1.843 \| good	5.924 \| good	0.156 \| good
2025-10-23T00:00:00.000Z	33 \| good	6.121 \| good	26.766 \| good	26.796 \| good	1.899 \| good	7.325 \| good	0.166 \| good
2025-10-23T01:00:00.000Z	38 \| good	7.046 \| good	31.043 \| good	22.136 \| good	2.135 \| good	6.934 \| good	0.162 \| good
2025-10-23T02:00:00.000Z	33 \| good	6.171 \| good	27.374 \| good	19.796 \| good	2.371 \| good	6.544 \| good	0.158 \| good
2025-10-23T03:00:00.000Z	33 \| good	6.357 \| good	28.098 \| good	18.73 \| good	2.608 \| good	6.154 \| good	0.154 \| good
2025-10-23T04:00:00.000Z	33 \| good	6.353 \| good	28.227 \| good	18.091 \| good	2.646 \| good	5.686 \| good	0.151 \| good
2025-10-23T05:00:00.000Z	38 \| good	6.556 \| good	29.242 \| good	19.601 \| good	2.684 \| good	5.218 \| good	0.147 \| good
2025-10-23T06:00:00.000Z	38 \| good	6.6 \| good	29.405 \| good	19.707 \| good	2.722 \| good	4.75 \| good	0.144 \| good
2025-10-23T07:00:00.000Z	33 \| good	6.063 \| good	27.03 \| good	16.689 \| good	2.554 \| good	4.295 \| good	0.141 \| good
2025-10-23T08:00:00.000Z	38 \| good	6.687 \| good	29.994 \| good	12.582 \| good	2.387 \| good	3.841 \| good	0.137 \| good
2025-10-23T09:00:00.000Z	38 \| good	6.55 \| good	29.32 \| good	9.912 \| good	2.219 \| good	3.386 \| good	0.134 \| good
2025-10-23T10:00:00.000Z	33 \| good	5.64 \| good	24.304 \| good	8.334 \| good	2.135 \| good	4.134 \| good	0.141 \| good
2025-10-23T11:00:00.000Z	22 \| good	4.485 \| good	19.304 \| good	7.285 \| good	2.051 \| good	4.881 \| good	0.147 \| good
2025-10-23T12:00:00.000Z	33 \| good	6.396 \| good	28.787 \| good	9.872 \| good	1.968 \| good	5.629 \| good	0.154 \| good
2025-10-23T13:00:00.000Z	27 \| good	5.346 \| good	23.1 \| good	20.736 \| good	2.144 \| good	4.588 \| good	0.149 \| good
2025-10-23T14:00:00.000Z	29 \| good	4.989 \| good	21.433 \| good	31.156 \| good	2.321 \| good	3.548 \| good	0.144 \| good
2025-10-23T15:00:00.000Z	31 \| good	3.832 \| good	16.902 \| good	33.712 \| good	2.498 \| good	2.508 \| good	0.14 \| good
2025-10-23T16:00:00.000Z	33 \| good	2.48 \| good	10.075 \| good	36.177 \| good	2.09 \| good	2.154 \| good	0.136 \| good
2025-10-23T17:00:00.000Z	37 \| good	1.244 \| good	4.967 \| good	39.606 \| good	1.682 \| good	1.801 \| good	0.133 \| good
2025-10-23T18:00:00.000Z	39 \| good	1.757 \| good	7.08 \| good	42.075 \| good	1.275 \| good	1.447 \| good	0.13 \| good
2025-10-23T19:00:00.000Z	40 \| good	1.65 \| good	6.956 \| good	42.555 \| good	1.209 \| good	1.652 \| good	0.131 \| good
2025-10-23T20:00:00.000Z	37 \| good	1.502 \| good	6 \| good	40.126 \| good	1.143 \| good	1.857 \| good	0.133 \| good

Gaithersburg

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Gaithersburg, Maryland

0.17ppm

How accurate is Maryland, USA air quality data?

The air quality data for Maryland, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

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 does the air quality data for Gaithersburg, Maryland get updated?

Air quality updates for Gaithersburg, Maryland are available every hour.

What time in the past 24 hours saw the poorest air quality in Gaithersburg, Maryland?

Gaithersburg, Maryland experienced its worst air quality at 12:00:00, 2025-10-21.

When was air quality in Gaithersburg, Maryland the best over the past 24 hours?

The best air quality in Gaithersburg, Maryland was observed at 03:00:00 on 2025-10-21.

What is the air quality in Gaithersburg, Maryland right now?

The air quality in Gaithersburg, Maryland right now is Good, with an AQI of 31.

What pollutant is most frequently found in Gaithersburg, Maryland?

In Gaithersburg, Maryland, O3 is the most frequently found pollutant.

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

When air quality in Gaithersburg, Maryland is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Gaithersburg, Maryland right now?

Gaithersburg, Maryland currently has a PM_2.5 concentration of 2.892 μg/m³.

What is the current level of PM₁₀ in Gaithersburg, Maryland?

Gaithersburg, Maryland currently has a PM₁₀ concentration of 11.084 μg/m³.

What is the current level of carbon monoxide (CO) in Gaithersburg, Maryland?

The current carbon monoxide (CO) level in Gaithersburg, Maryland is 0.182 ppm.

What is the current level of sulfur dioxide (SO₂) in Gaithersburg, Maryland?

The current sulfur dioxide (SO₂) concentration in Gaithersburg, Maryland is 0.295 ppb.

What is the current level of ozone (O₃) in Gaithersburg, Maryland?

Gaithersburg, Maryland currently has an ozone (O₃) concentration of 34.159 ppm.

What is the current level of nitrogen dioxide (NO₂) in Gaithersburg, Maryland?

The current level of nitrogen dioxide (NO₂) in Gaithersburg, Maryland is 4.744 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-19T21:00:00.000Z	44 \| good	8.453 \| good	33.445 \| good	44.685 \| good	0.256 \| good	2.203 \| good	0.185 \| good
2025-10-19T22:00:00.000Z	44 \| good	7.785 \| good	30.943 \| good	45.651 \| good	0.265 \| good	2.56 \| good	0.185 \| good
2025-10-19T23:00:00.000Z	34 \| good	4.94 \| good	16.256 \| good	36.633 \| good	0.282 \| good	2.584 \| good	0.185 \| good
2025-10-20T00:00:00.000Z	33 \| good	4.674 \| good	21.699 \| good	35.812 \| good	0.252 \| good	2.96 \| good	0.185 \| good
2025-10-20T01:00:00.000Z	37 \| good	4.902 \| good	20.768 \| good	39.785 \| good	0.216 \| good	3.383 \| good	0.204 \| good
2025-10-20T02:00:00.000Z	36 \| good	4.31 \| good	17.777 \| good	38.854 \| good	0.228 \| good	2.513 \| good	0.204 \| good
2025-10-20T03:00:00.000Z	35 \| good	4.089 \| good	14.651 \| good	37.872 \| good	0.208 \| good	2.38 \| good	0.153 \| good
2025-10-20T04:00:00.000Z	35 \| good	3.388 \| good	13.943 \| good	37.906 \| good	0.182 \| good	1.996 \| good	0.153 \| good
2025-10-20T05:00:00.000Z	33 \| good	2.519 \| good	7.902 \| good	36.301 \| good	0.211 \| good	2.119 \| good	0.153 \| good
2025-10-20T06:00:00.000Z	31 \| good	2.188 \| good	7.49 \| good	33.153 \| good	0.143 \| good	2.354 \| good	0.153 \| good
2025-10-20T07:00:00.000Z	30 \| good	1.916 \| good	6.58 \| good	31.789 \| good	0.164 \| good	1.856 \| good	0.153 \| good
2025-10-20T08:00:00.000Z	23 \| good	1.666 \| good	8.569 \| good	25.433 \| good	0.147 \| good	1.873 \| good	0.153 \| good
2025-10-20T09:00:00.000Z	22 \| good	1.94 \| good	7.665 \| good	23.756 \| good	0.164 \| good	2.552 \| good	0.174 \| good
2025-10-20T10:00:00.000Z	24 \| good	1.568 \| good	5.393 \| good	25.749 \| good	0.167 \| good	2.675 \| good	0.153 \| good
2025-10-20T11:00:00.000Z	23 \| good	1.848 \| good	8.265 \| good	25.201 \| good	0.168 \| good	3.586 \| good	0.147 \| good
2025-10-20T12:00:00.000Z	24 \| good	1.428 \| good	5.042 \| good	25.546 \| good	0.184 \| good	3.879 \| good	0.124 \| good
2025-10-20T13:00:00.000Z	21 \| good	1.322 \| good	5.89 \| good	22.695 \| good	0.158 \| good	5.097 \| good	0.166 \| good
2025-10-20T14:00:00.000Z	23 \| good	3.605 \| good	19.024 \| good	25.363 \| good	0.178 \| good	4.936 \| good	0.185 \| good
2025-10-20T15:00:00.000Z	25 \| good	3.692 \| good	14.006 \| good	27.309 \| good	0.22 \| good	2.926 \| good	0.142 \| good
2025-10-20T16:00:00.000Z	28 \| good	3.046 \| good	13.537 \| good	29.782 \| good	0.237 \| good	1.913 \| good	0.124 \| good
2025-10-20T17:00:00.000Z	29 \| good	2.882 \| good	12.772 \| good	30.976 \| good	0.197 \| good	1.902 \| good	0.143 \| good
2025-10-20T18:00:00.000Z	29 \| good	2.514 \| good	11.436 \| good	30.607 \| good	0.186 \| good	1.675 \| good	0.142 \| good
2025-10-20T19:00:00.000Z	29 \| good	2.832 \| good	11.605 \| good	31.234 \| good	0.175 \| good	1.631 \| good	0.142 \| good
2025-10-20T20:00:00.000Z	30 \| good	2.83 \| good	10.927 \| good	32.195 \| good	0.183 \| good	1.7 \| good	0.142 \| good
2025-10-20T21:00:00.000Z	30 \| good	2.022 \| good	7.74 \| good	31.544 \| good	0.147 \| good	1.901 \| good	0.142 \| good
2025-10-20T22:00:00.000Z	29 \| good	2.143 \| good	9.661 \| good	31.362 \| good	0.169 \| good	4.462 \| good	0.142 \| good
2025-10-20T23:00:00.000Z	28 \| good	1.637 \| good	7.288 \| good	30.004 \| good	0.175 \| good	7.848 \| good	0.142 \| good
2025-10-21T00:00:00.000Z	27 \| good	1.126 \| good	2.493 \| good	29.051 \| good	0.153 \| good	9.412 \| good	0.142 \| good
2025-10-21T01:00:00.000Z	25 \| good	2.339 \| good	7.79 \| good	26.719 \| good	0.175 \| good	14.164 \| good	0.181 \| good
2025-10-21T02:00:00.000Z	22 \| good	3.536 \| good	14.174 \| good	23.394 \| good	0.151 \| good	14.429 \| good	0.261 \| good
2025-10-21T03:00:00.000Z	38 \| good	6.731 \| good	29.743 \| good	15.654 \| good	1.823 \| good	14.833 \| good	0.218 \| good
2025-10-21T04:00:00.000Z	49 \| good	9.083 \| good	14.486 \| good	15.783 \| good	0.2 \| good	14.617 \| good	0.337 \| good
2025-10-21T05:00:00.000Z	22 \| good	4.373 \| good	20.237 \| good	12.007 \| good	0.189 \| good	14.728 \| good	0.361 \| good
2025-10-21T06:00:00.000Z	22 \| good	4.202 \| good	20.98 \| good	4.7 \| good	0.18 \| good	12.089 \| good	0.365 \| good
2025-10-21T07:00:00.000Z	27 \| good	4.544 \| good	21.051 \| good	7.402 \| good	0.207 \| good	13.113 \| good	0.342 \| good
2025-10-21T08:00:00.000Z	22 \| good	3.789 \| good	17.114 \| good	4.064 \| good	0.251 \| good	11.19 \| good	0.342 \| good
2025-10-21T09:00:00.000Z	27 \| good	4.654 \| good	23.826 \| good	5.136 \| good	0.256 \| good	11.288 \| good	0.342 \| good
2025-10-21T10:00:00.000Z	27 \| good	5.224 \| good	25.735 \| good	3.002 \| good	0.362 \| good	15.013 \| good	0.342 \| good
2025-10-21T11:00:00.000Z	49 \| good	8.531 \| good	16.136 \| good	3.797 \| good	0.366 \| good	15.03 \| good	0.365 \| good
2025-10-21T12:00:00.000Z	58 \| moderate	12.807 \| fine	27.204 \| good	3.142 \| good	0.46 \| good	15.334 \| good	0.532 \| good
2025-10-21T13:00:00.000Z	33 \| good	6.357 \| good	30.116 \| good	3.275 \| good	0.463 \| good	16.981 \| good	0.636 \| good
2025-10-21T14:00:00.000Z	27 \| good	4.591 \| good	21.868 \| good	4.579 \| good	0.365 \| good	16.811 \| good	0.67 \| good
2025-10-21T15:00:00.000Z	22 \| good	3.995 \| good	16.157 \| good	12.724 \| good	0.317 \| good	15.615 \| good	0.517 \| good
2025-10-21T16:00:00.000Z	33 \| good	5.855 \| good	22.733 \| good	17.652 \| good	0.318 \| good	10.378 \| good	0.284 \| good
2025-10-21T17:00:00.000Z	27 \| good	4.702 \| good	17.43 \| good	22.041 \| good	0.3 \| good	6.443 \| good	0.182 \| good
2025-10-21T18:00:00.000Z	26 \| good	3.586 \| good	18.175 \| good	27.513 \| good	0.284 \| good	5.474 \| good	0.16 \| good
2025-10-21T19:00:00.000Z	28 \| good	3.223 \| good	14.929 \| good	30.033 \| good	0.265 \| good	5.397 \| good	0.16 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.892 \| good	11.084 \| good	34.159 \| good	0.295 \| good	4.744 \| good	0.182 \| good
2025-10-21T20:00:00.000Z	31 \| good	2.892 \| good	11.084 \| good	34.159 \| good	0.295 \| good	4.744 \| good	0.182 \| good
2025-10-21T21:00:00.000Z	40 \| good	5.694 \| good	24.902 \| good	42.542 \| good	1.544 \| good	4.287 \| good	0.168 \| good
2025-10-21T22:00:00.000Z	38 \| good	6.766 \| good	29.919 \| good	37.636 \| good	1.693 \| good	8.33 \| good	0.199 \| good
2025-10-21T23:00:00.000Z	33 \| good	5.678 \| good	24.377 \| good	28.727 \| good	1.842 \| good	12.374 \| good	0.229 \| good
2025-10-22T00:00:00.000Z	33 \| good	5.877 \| good	25.362 \| good	27.264 \| good	1.991 \| good	16.418 \| good	0.259 \| good
2025-10-22T01:00:00.000Z	27 \| good	5.371 \| good	23.129 \| good	24.692 \| good	1.808 \| good	15.187 \| good	0.248 \| good
2025-10-22T02:00:00.000Z	27 \| good	5.129 \| good	22.514 \| good	24.008 \| good	1.624 \| good	13.957 \| good	0.237 \| good
2025-10-22T03:00:00.000Z	33 \| good	5.722 \| good	25.077 \| good	23.343 \| good	1.441 \| good	12.726 \| good	0.226 \| good
2025-10-22T04:00:00.000Z	33 \| good	5.519 \| good	24.087 \| good	18.49 \| good	1.356 \| good	10.04 \| good	0.206 \| good
2025-10-22T05:00:00.000Z	27 \| good	4.935 \| good	21.573 \| good	20.663 \| good	1.271 \| good	7.353 \| good	0.187 \| good
2025-10-22T06:00:00.000Z	27 \| good	5.166 \| good	22.318 \| good	23.07 \| good	1.186 \| good	4.667 \| good	0.167 \| good
2025-10-22T07:00:00.000Z	23 \| good	4.458 \| good	19.127 \| good	24.577 \| good	1.803 \| good	3.965 \| good	0.157 \| good
2025-10-22T08:00:00.000Z	22 \| good	4.455 \| good	19.166 \| good	23.268 \| good	2.421 \| good	3.263 \| good	0.148 \| good
2025-10-22T09:00:00.000Z	22 \| good	4.144 \| good	18.133 \| good	21.864 \| good	3.039 \| good	2.562 \| good	0.138 \| good
2025-10-22T10:00:00.000Z	18 \| good	2.883 \| good	12.061 \| good	18.759 \| good	3.088 \| good	3.425 \| good	0.142 \| good
2025-10-22T11:00:00.000Z	13 \| good	2.477 \| good	9.997 \| good	13.741 \| good	3.137 \| good	4.288 \| good	0.146 \| good
2025-10-22T12:00:00.000Z	22 \| good	3.891 \| good	16.929 \| good	17.321 \| good	3.186 \| good	5.151 \| good	0.151 \| good
2025-10-22T13:00:00.000Z	22 \| good	3.82 \| good	16.429 \| good	23.573 \| good	3.15 \| good	4.172 \| good	0.145 \| good
2025-10-22T14:00:00.000Z	30 \| good	3.316 \| good	14.731 \| good	31.526 \| good	3.115 \| good	3.192 \| good	0.139 \| good
2025-10-22T15:00:00.000Z	31 \| good	3.238 \| good	13.987 \| good	32.962 \| good	3.08 \| good	2.213 \| good	0.134 \| good
2025-10-22T16:00:00.000Z	31 \| good	2.922 \| good	12 \| good	33.803 \| good	2.749 \| good	2.009 \| good	0.131 \| good
2025-10-22T17:00:00.000Z	33 \| good	2.468 \| good	10 \| good	35.542 \| good	2.417 \| good	1.805 \| good	0.129 \| good
2025-10-22T18:00:00.000Z	33 \| good	3.427 \| good	15.049 \| good	35.558 \| good	2.086 \| good	1.601 \| good	0.127 \| good
2025-10-22T19:00:00.000Z	31 \| good	2.578 \| good	10.167 \| good	34.142 \| good	1.968 \| good	2.107 \| good	0.13 \| good
2025-10-22T20:00:00.000Z	32 \| good	3.04 \| good	12.15 \| good	35.022 \| good	1.85 \| good	2.614 \| good	0.134 \| good
2025-10-22T21:00:00.000Z	31 \| good	2.893 \| good	11.979 \| good	34.289 \| good	1.732 \| good	3.121 \| good	0.137 \| good
2025-10-22T22:00:00.000Z	30 \| good	2.578 \| good	10.145 \| good	31.739 \| good	1.788 \| good	4.523 \| good	0.147 \| good
2025-10-22T23:00:00.000Z	26 \| good	2.534 \| good	10.104 \| good	28.435 \| good	1.843 \| good	5.924 \| good	0.156 \| good
2025-10-23T00:00:00.000Z	33 \| good	6.121 \| good	26.766 \| good	26.796 \| good	1.899 \| good	7.325 \| good	0.166 \| good
2025-10-23T01:00:00.000Z	38 \| good	7.046 \| good	31.043 \| good	22.136 \| good	2.135 \| good	6.934 \| good	0.162 \| good
2025-10-23T02:00:00.000Z	33 \| good	6.171 \| good	27.374 \| good	19.796 \| good	2.371 \| good	6.544 \| good	0.158 \| good
2025-10-23T03:00:00.000Z	33 \| good	6.357 \| good	28.098 \| good	18.73 \| good	2.608 \| good	6.154 \| good	0.154 \| good
2025-10-23T04:00:00.000Z	33 \| good	6.353 \| good	28.227 \| good	18.091 \| good	2.646 \| good	5.686 \| good	0.151 \| good
2025-10-23T05:00:00.000Z	38 \| good	6.556 \| good	29.242 \| good	19.601 \| good	2.684 \| good	5.218 \| good	0.147 \| good
2025-10-23T06:00:00.000Z	38 \| good	6.6 \| good	29.405 \| good	19.707 \| good	2.722 \| good	4.75 \| good	0.144 \| good
2025-10-23T07:00:00.000Z	33 \| good	6.063 \| good	27.03 \| good	16.689 \| good	2.554 \| good	4.295 \| good	0.141 \| good
2025-10-23T08:00:00.000Z	38 \| good	6.687 \| good	29.994 \| good	12.582 \| good	2.387 \| good	3.841 \| good	0.137 \| good
2025-10-23T09:00:00.000Z	38 \| good	6.55 \| good	29.32 \| good	9.912 \| good	2.219 \| good	3.386 \| good	0.134 \| good
2025-10-23T10:00:00.000Z	33 \| good	5.64 \| good	24.304 \| good	8.334 \| good	2.135 \| good	4.134 \| good	0.141 \| good
2025-10-23T11:00:00.000Z	22 \| good	4.485 \| good	19.304 \| good	7.285 \| good	2.051 \| good	4.881 \| good	0.147 \| good
2025-10-23T12:00:00.000Z	33 \| good	6.396 \| good	28.787 \| good	9.872 \| good	1.968 \| good	5.629 \| good	0.154 \| good
2025-10-23T13:00:00.000Z	27 \| good	5.346 \| good	23.1 \| good	20.736 \| good	2.144 \| good	4.588 \| good	0.149 \| good
2025-10-23T14:00:00.000Z	29 \| good	4.989 \| good	21.433 \| good	31.156 \| good	2.321 \| good	3.548 \| good	0.144 \| good
2025-10-23T15:00:00.000Z	31 \| good	3.832 \| good	16.902 \| good	33.712 \| good	2.498 \| good	2.508 \| good	0.14 \| good
2025-10-23T16:00:00.000Z	33 \| good	2.48 \| good	10.075 \| good	36.177 \| good	2.09 \| good	2.154 \| good	0.136 \| good
2025-10-23T17:00:00.000Z	37 \| good	1.244 \| good	4.967 \| good	39.606 \| good	1.682 \| good	1.801 \| good	0.133 \| good
2025-10-23T18:00:00.000Z	39 \| good	1.757 \| good	7.08 \| good	42.075 \| good	1.275 \| good	1.447 \| good	0.13 \| good
2025-10-23T19:00:00.000Z	40 \| good	1.65 \| good	6.956 \| good	42.555 \| good	1.209 \| good	1.652 \| good	0.131 \| good
2025-10-23T20:00:00.000Z	37 \| good	1.502 \| good	6 \| good	40.126 \| good	1.143 \| good	1.857 \| good	0.133 \| good

Current air quality index in Gaithersburg, Maryland today

Common air pollutants in Gaithersburg, Maryland

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Gaithersburg, Maryland air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Gaithersburg, Maryland

Air quality in nearby cities

Flower Hill, Maryland

Montgomery Village, Maryland

Redland, Maryland

North Potomac, Maryland

Germantown, Maryland

Rockville, Maryland

How accurate is Maryland, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently does the air quality data for Gaithersburg, Maryland get updated?

What time in the past 24 hours saw the poorest air quality in Gaithersburg, Maryland?

When was air quality in Gaithersburg, Maryland the best over the past 24 hours?

What is the air quality in Gaithersburg, Maryland right now?

What pollutant is most frequently found in Gaithersburg, Maryland?

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

What is the PM2.5 concentration in Gaithersburg, Maryland right now?

What is the current level of PM10 in Gaithersburg, Maryland?

What is the current level of carbon monoxide (CO) in Gaithersburg, Maryland?

What is the current level of sulfur dioxide (SO2) in Gaithersburg, Maryland?

What is the current level of ozone (O3) in Gaithersburg, Maryland?

What is the current level of nitrogen dioxide (NO2) in Gaithersburg, Maryland?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Gaithersburg, Maryland right now?

What is the current level of PM₁₀ in Gaithersburg, Maryland?

What is the current level of sulfur dioxide (SO₂) in Gaithersburg, Maryland?

What is the current level of ozone (O₃) in Gaithersburg, Maryland?

What is the current level of nitrogen dioxide (NO₂) in Gaithersburg, Maryland?