What are the current PM10 levels at Catonsville, Maryland?

The current PM10 levels in Catonsville, Maryland are 47.172 μg/m3.

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

The current sulfur dioxide (SO2) levels in Catonsville, Maryland are 0.393 ppb.

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

The current ozone (O3) levels at Catonsville, Maryland is 9.034 ppm.

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

The current nitrogen dioxide (NO2) levels at Catonsville, Maryland is 20.939 ppb.

Real-time air quality index in Catonsville, Maryland today

Q: What are the current PM2.5 levels in Catonsville, Maryland?

The measured PM2.5 levels in Catonsville, Maryland at present are 16.408 μg/m3.

Stay updated with real-time air quality in Catonsville, 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)

Moderate

Catonsville, Maryland

Last updated: ... (Local time)

Common air pollutants in Catonsville, Maryland

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

16.00 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

64.89 μg/m³

155

255

425

605+

Ozone (O₃)

7.04 ppb

201

201+

Sulfur Dioxide (SO₂)

0.44 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

21.04 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.38 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Catonsville, Maryland

Get Live Pollen Counts

Catonsville, Maryland

Scroll To Air Quality Map

Track live Catonsville, Maryland air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T05:00:00.000Z	38 \| good	6.76 \| good	29.519 \| good	26.137 \| good	0.198 \| good	6.999 \| good	0.119 \| good
2025-12-05T06:00:00.000Z	33 \| good	6.434 \| good	28.624 \| good	27.933 \| good	0.377 \| good	5.459 \| good	0.116 \| good
2025-12-05T07:00:00.000Z	38 \| good	6.538 \| good	28.636 \| good	28.661 \| good	0.353 \| good	5.005 \| good	0.107 \| good
2025-12-05T08:00:00.000Z	28 \| good	4.745 \| good	20.678 \| good	30.462 \| good	0.251 \| good	4.41 \| good	0.107 \| good
2025-12-05T09:00:00.000Z	28 \| good	3.658 \| good	16.112 \| good	29.72 \| good	0.144 \| good	5.589 \| good	0.113 \| good
2025-12-05T10:00:00.000Z	27 \| good	2.992 \| good	12.426 \| good	28.785 \| good	0.186 \| good	5.105 \| good	0.113 \| good
2025-12-05T11:00:00.000Z	28 \| good	4.131 \| good	17.836 \| good	29.805 \| good	0.228 \| good	5.671 \| good	0.174 \| good
2025-12-05T12:00:00.000Z	29 \| good	4.412 \| good	19.115 \| good	30.537 \| good	0.232 \| good	5.152 \| good	0.174 \| good
2025-12-05T13:00:00.000Z	30 \| good	3.975 \| good	16.837 \| good	31.926 \| good	0.203 \| good	6.509 \| good	0.192 \| good
2025-12-05T14:00:00.000Z	33 \| good	5.651 \| good	24.26 \| good	31.121 \| good	0.214 \| good	8.081 \| good	0.192 \| good
2025-12-05T15:00:00.000Z	33 \| good	5.675 \| good	24.594 \| good	30.015 \| good	0.213 \| good	9.187 \| good	0.186 \| good
2025-12-05T16:00:00.000Z	28 \| good	5.451 \| good	22.978 \| good	30.2 \| good	0.155 \| good	8.822 \| good	0.192 \| good
2025-12-05T17:00:00.000Z	33 \| good	5.686 \| good	24.872 \| good	28.542 \| good	0.179 \| good	8.493 \| good	0.186 \| good
2025-12-05T18:00:00.000Z	28 \| good	3.984 \| good	10.241 \| good	30 \| good	0.449 \| good	8.775 \| good	0.186 \| good
2025-12-05T19:00:00.000Z	38 \| good	7.18 \| good	32.974 \| good	27.884 \| good	0.169 \| good	10.986 \| good	0.24 \| good
2025-12-05T20:00:00.000Z	38 \| good	6.972 \| good	31.618 \| good	25.018 \| good	0.277 \| good	14.222 \| good	0.267 \| good
2025-12-05T21:00:00.000Z	44 \| good	7.811 \| good	33.195 \| good	22.555 \| good	0.266 \| good	16.507 \| good	0.261 \| good
2025-12-05T22:00:00.000Z	49 \| good	8.658 \| good	38.68 \| good	18.846 \| good	0.147 \| good	15.859 \| good	0.261 \| good
2025-12-05T23:00:00.000Z	49 \| good	8.755 \| good	36.548 \| good	16.917 \| good	0.151 \| good	17.335 \| good	0.274 \| good
2025-12-06T00:00:00.000Z	49 \| good	8.868 \| good	35.641 \| good	14.712 \| good	0.216 \| good	17.189 \| good	0.279 \| good
2025-12-06T01:00:00.000Z	52 \| moderate	10.434 \| good	42.802 \| good	14.758 \| good	0.142 \| good	20.959 \| good	0.225 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	10.974 \| good	46.758 \| good	14.687 \| good	0.239 \| good	20.377 \| good	0.225 \| good
2025-12-06T03:00:00.000Z	56 \| moderate	11.782 \| good	50.162 \| good	14.28 \| good	0.193 \| good	14.572 \| good	0.225 \| good
2025-12-06T04:00:00.000Z	54 \| moderate	11.493 \| good	45.64 \| good	14.834 \| good	0.175 \| good	14.184 \| good	0.198 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	12.094 \| good	44.896 \| good	14.836 \| good	0.221 \| good	12.089 \| good	0.219 \| good
2025-12-06T06:00:00.000Z	58 \| moderate	13.053 \| fine	53.426 \| good	14.725 \| good	0.178 \| good	10.963 \| good	0.186 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.101 \| fine	59.34 \| fine	14.199 \| good	0.194 \| good	11.134 \| good	0.186 \| good
2025-12-06T08:00:00.000Z	58 \| moderate	12.752 \| fine	55.415 \| fine	12.211 \| good	0.171 \| good	13.246 \| good	0.225 \| good
2025-12-06T09:00:00.000Z	58 \| moderate	13.263 \| fine	55.135 \| fine	12.947 \| good	0.177 \| good	13.99 \| good	0.198 \| good
2025-12-06T10:00:00.000Z	60 \| moderate	14.458 \| fine	56.038 \| fine	12.589 \| good	0.224 \| good	11.547 \| good	0.198 \| good
2025-12-06T11:00:00.000Z	60 \| moderate	14.354 \| fine	61.594 \| fine	11.617 \| good	0.229 \| good	10.098 \| good	0.199 \| good
2025-12-06T12:00:00.000Z	60 \| moderate	14.474 \| fine	64.621 \| fine	8.451 \| good	0.122 \| good	10.86 \| good	0.247 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	13.633 \| fine	59.377 \| fine	9.509 \| good	0.127 \| good	12.269 \| good	0.253 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.486 \| fine	62.779 \| fine	10.922 \| good	0.155 \| good	16.849 \| good	0.347 \| good
2025-12-06T15:00:00.000Z	64 \| moderate	15.503 \| fine	64.121 \| fine	11.245 \| good	0.171 \| good	16.865 \| good	0.346 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.706 \| fine	64.314 \| fine	13.864 \| good	0.268 \| good	14.778 \| good	0.286 \| good
2025-12-06T17:00:00.000Z	58 \| moderate	13.384 \| fine	54.045 \| good	17.48 \| good	0.272 \| good	11.233 \| good	0.286 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.942 \| good	41.039 \| good	18.197 \| good	0.298 \| good	9.02 \| good	0.205 \| good
2025-12-06T19:00:00.000Z	49 \| good	8.619 \| good	32.739 \| good	18.555 \| good	0.234 \| good	7.48 \| good	0.138 \| good
2025-12-06T20:00:00.000Z	38 \| good	7.32 \| good	26.876 \| good	19.955 \| good	0.208 \| good	6.056 \| good	0.132 \| good
2025-12-06T21:00:00.000Z	33 \| good	6.314 \| good	22.067 \| good	21.807 \| good	0.174 \| good	6.696 \| good	0.125 \| good
2025-12-06T22:00:00.000Z	38 \| good	6.921 \| good	28.512 \| good	20.619 \| good	0.218 \| good	7.975 \| good	0.132 \| good
2025-12-06T23:00:00.000Z	44 \| good	8.06 \| good	32.751 \| good	18.487 \| good	0.195 \| good	10.809 \| good	0.125 \| good
2025-12-07T00:00:00.000Z	49 \| good	8.554 \| good	40.908 \| good	16.408 \| good	0.191 \| good	15.452 \| good	0.231 \| good
2025-12-07T01:00:00.000Z	52 \| moderate	9.737 \| good	46.269 \| good	13.923 \| good	0.25 \| good	18.053 \| good	0.298 \| good
2025-12-07T02:00:00.000Z	54 \| moderate	10.831 \| good	37.947 \| good	10.391 \| good	0.366 \| good	18.707 \| good	0.344 \| good
2025-12-07T03:00:00.000Z	58 \| moderate	13.474 \| fine	58.104 \| fine	8.391 \| good	0.327 \| good	19.997 \| good	0.338 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	14.737 \| fine	64.099 \| fine	8.539 \| good	0.547 \| good	18.24 \| good	0.371 \| good
2025-12-07T04:00:00.000Z	64 \| moderate	16.001 \| fine	64.894 \| fine	7.045 \| good	0.444 \| good	21.041 \| good	0.377 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	15.051 \| fine	66.737 \| fine	11.672 \| good	3.202 \| good	19.306 \| good	0.29 \| good
2025-12-07T05:00:00.000Z	56 \| moderate	12.215 \| fine	54.68 \| good	14.309 \| good	3.126 \| good	14.256 \| good	0.249 \| good
2025-12-07T06:00:00.000Z	54 \| moderate	11.483 \| good	50.93 \| good	14.134 \| good	3.05 \| good	9.207 \| good	0.209 \| good
2025-12-07T07:00:00.000Z	52 \| moderate	10.169 \| good	44.986 \| good	13.686 \| good	3.059 \| good	9.16 \| good	0.207 \| good
2025-12-07T08:00:00.000Z	54 \| moderate	10.907 \| good	47.993 \| good	12.743 \| good	3.068 \| good	9.114 \| good	0.205 \| good
2025-12-07T09:00:00.000Z	56 \| moderate	11.914 \| good	53.003 \| good	11.524 \| good	3.078 \| good	9.068 \| good	0.203 \| good
2025-12-07T10:00:00.000Z	58 \| moderate	13.332 \| fine	60.716 \| fine	9.83 \| good	3.236 \| good	12.84 \| good	0.226 \| good
2025-12-07T11:00:00.000Z	66 \| moderate	17.127 \| fine	76.217 \| fine	7.139 \| good	3.395 \| good	16.612 \| good	0.25 \| good
2025-12-07T12:00:00.000Z	69 \| moderate	19.14 \| fine	84.464 \| fine	5.406 \| good	3.553 \| good	20.383 \| good	0.274 \| good
2025-12-07T13:00:00.000Z	77 \| moderate	22.957 \| fine	100.423 \| fine	5.909 \| good	4.193 \| good	16.109 \| good	0.255 \| good
2025-12-07T14:00:00.000Z	71 \| moderate	20.328 \| fine	89.263 \| fine	10.681 \| good	4.834 \| good	11.835 \| good	0.236 \| good
2025-12-07T15:00:00.000Z	67 \| moderate	17.994 \| fine	79.382 \| fine	16.724 \| good	5.474 \| good	7.56 \| good	0.217 \| good
2025-12-07T16:00:00.000Z	62 \| moderate	14.826 \| fine	66.627 \| fine	21.785 \| good	5.742 \| good	7.169 \| good	0.213 \| good
2025-12-07T17:00:00.000Z	56 \| moderate	11.836 \| good	52.322 \| good	28.838 \| good	6.01 \| good	6.777 \| good	0.208 \| good
2025-12-07T18:00:00.000Z	52 \| moderate	10.131 \| good	44.949 \| good	31.945 \| good	6.278 \| good	6.386 \| good	0.204 \| good
2025-12-07T19:00:00.000Z	49 \| good	9.401 \| good	41.896 \| good	33.956 \| good	6.126 \| good	8.393 \| good	0.213 \| good
2025-12-07T20:00:00.000Z	54 \| moderate	10.717 \| good	47.427 \| good	33.245 \| good	5.974 \| good	10.4 \| good	0.221 \| good
2025-12-07T21:00:00.000Z	58 \| moderate	12.575 \| fine	56.865 \| fine	26.364 \| good	5.823 \| good	12.408 \| good	0.23 \| good
2025-12-07T22:00:00.000Z	60 \| moderate	14.48 \| fine	64.656 \| fine	17.021 \| good	5.501 \| good	18.269 \| good	0.304 \| good
2025-12-07T23:00:00.000Z	66 \| moderate	16.717 \| fine	74.646 \| fine	12.059 \| good	5.179 \| good	24.131 \| good	0.379 \| good
2025-12-08T00:00:00.000Z	67 \| moderate	18.334 \| fine	80.822 \| fine	5.893 \| good	4.857 \| good	29.993 \| good	0.454 \| good
2025-12-08T01:00:00.000Z	69 \| moderate	18.662 \| fine	82.405 \| fine	3.973 \| good	4.58 \| good	30.077 \| good	0.434 \| good
2025-12-08T02:00:00.000Z	67 \| moderate	17.528 \| fine	77.79 \| fine	4.967 \| good	4.303 \| good	30.162 \| good	0.413 \| good
2025-12-08T03:00:00.000Z	66 \| moderate	16.753 \| fine	74.301 \| fine	8.807 \| good	4.025 \| good	30.246 \| good	0.393 \| good
2025-12-08T04:00:00.000Z	60 \| moderate	14.376 \| fine	64.198 \| fine	11.349 \| good	4.03 \| good	25.652 \| good	0.352 \| good
2025-12-08T05:00:00.000Z	54 \| moderate	10.799 \| good	48.076 \| good	19.119 \| good	4.034 \| good	21.058 \| good	0.311 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.149 \| good	40.965 \| good	23.438 \| good	4.038 \| good	16.464 \| good	0.27 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.689 \| good	43.025 \| good	23.043 \| good	4.164 \| good	13.074 \| good	0.248 \| good
2025-12-08T08:00:00.000Z	27 \| good	5.378 \| good	23.192 \| good	23.81 \| good	4.291 \| good	9.685 \| good	0.226 \| good
2025-12-08T09:00:00.000Z	26 \| good	0.668 \| good	2.45 \| good	27.66 \| good	4.417 \| good	6.296 \| good	0.205 \| good
2025-12-08T10:00:00.000Z	24 \| good	0.275 \| good	0.995 \| good	26.383 \| good	3.286 \| good	5.64 \| good	0.191 \| good
2025-12-08T11:00:00.000Z	21 \| good	2.102 \| good	8.61 \| good	23.376 \| good	2.154 \| good	4.985 \| good	0.178 \| good
2025-12-08T12:00:00.000Z	19 \| good	2.792 \| good	11.418 \| good	20.618 \| good	1.023 \| good	4.329 \| good	0.165 \| good
2025-12-08T13:00:00.000Z	19 \| good	2.01 \| good	8.234 \| good	21.07 \| good	1.238 \| good	3.961 \| good	0.165 \| good
2025-12-08T14:00:00.000Z	23 \| good	1.737 \| good	7.355 \| good	24.902 \| good	1.453 \| good	3.593 \| good	0.165 \| good
2025-12-08T15:00:00.000Z	25 \| good	0.96 \| good	3.743 \| good	27.192 \| good	1.668 \| good	3.225 \| good	0.164 \| good
2025-12-08T16:00:00.000Z	25 \| good	0.852 \| good	3.179 \| good	27.113 \| good	1.731 \| good	2.971 \| good	0.162 \| good
2025-12-08T17:00:00.000Z	25 \| good	0.442 \| good	1.964 \| good	26.661 \| good	1.794 \| good	2.718 \| good	0.159 \| good
2025-12-08T18:00:00.000Z	25 \| good	0.386 \| good	1.564 \| good	26.931 \| good	1.857 \| good	2.464 \| good	0.157 \| good
2025-12-08T19:00:00.000Z	24 \| good	0.192 \| good	0.256 \| good	26.466 \| good	1.954 \| good	3.118 \| good	0.157 \| good
2025-12-08T20:00:00.000Z	26 \| good	0.816 \| good	3.033 \| good	27.7 \| good	2.052 \| good	3.773 \| good	0.157 \| good
2025-12-08T21:00:00.000Z	22 \| good	1.149 \| good	4.667 \| good	24.17 \| good	2.149 \| good	4.427 \| good	0.158 \| good
2025-12-08T22:00:00.000Z	18 \| good	2.389 \| good	9.669 \| good	19.09 \| good	2.21 \| good	8.618 \| good	0.184 \| good
2025-12-08T23:00:00.000Z	22 \| good	4.279 \| good	18.644 \| good	15.608 \| good	2.272 \| good	12.808 \| good	0.21 \| good
2025-12-09T00:00:00.000Z	49 \| good	9.005 \| good	9.688 \| good	18.676 \| good	2.352 \| good	17.226 \| good	0.237 \| good
2025-12-09T01:00:00.000Z	38 \| good	7.425 \| good	32.934 \| good	13.716 \| good	2.466 \| good	17.084 \| good	0.235 \| good
2025-12-09T02:00:00.000Z	49 \| good	8.714 \| good	38.221 \| good	11.12 \| good	2.599 \| good	17.169 \| good	0.234 \| good
2025-12-09T03:00:00.000Z	52 \| moderate	10.003 \| good	44.555 \| good	9.919 \| good	2.732 \| good	17.255 \| good	0.234 \| good

Catonsville

Empower business decisions with accurate air quality data

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

0.41ppm

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 Catonsville, Maryland updated?

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

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

The worst air quality in Catonsville, Maryland was recorded at 12:00:00 on 2025-12-06.

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

The best air quality in Catonsville, Maryland was recorded at 09:00:00 on 2025-12-06.

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

The real-time air quality index in Catonsville, Maryland is 64, currently categorized as Moderate.

Which pollutant is found most often in Catonsville, Maryland?

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

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

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

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

The measured PM_2.5 levels in Catonsville, Maryland at present are 16.408 μg/m³.

What are the current PM₁₀ levels at Catonsville, Maryland?

The current PM₁₀ levels in Catonsville, Maryland are 47.172 μg/m³.

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

The current carbon monoxide (CO) level in Catonsville, Maryland is 0.39 ppm.

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

The current sulfur dioxide (SO₂) levels in Catonsville, Maryland are 0.393 ppb.

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

The current ozone (O₃) levels at Catonsville, Maryland is 9.034 ppm.

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

The current nitrogen dioxide (NO₂) levels at Catonsville, Maryland is 20.939 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T05:00:00.000Z	38 \| good	6.76 \| good	29.519 \| good	26.137 \| good	0.198 \| good	6.999 \| good	0.119 \| good
2025-12-05T06:00:00.000Z	33 \| good	6.434 \| good	28.624 \| good	27.933 \| good	0.377 \| good	5.459 \| good	0.116 \| good
2025-12-05T07:00:00.000Z	38 \| good	6.538 \| good	28.636 \| good	28.661 \| good	0.353 \| good	5.005 \| good	0.107 \| good
2025-12-05T08:00:00.000Z	28 \| good	4.745 \| good	20.678 \| good	30.462 \| good	0.251 \| good	4.41 \| good	0.107 \| good
2025-12-05T09:00:00.000Z	28 \| good	3.658 \| good	16.112 \| good	29.72 \| good	0.144 \| good	5.589 \| good	0.113 \| good
2025-12-05T10:00:00.000Z	27 \| good	2.992 \| good	12.426 \| good	28.785 \| good	0.186 \| good	5.105 \| good	0.113 \| good
2025-12-05T11:00:00.000Z	28 \| good	4.131 \| good	17.836 \| good	29.805 \| good	0.228 \| good	5.671 \| good	0.174 \| good
2025-12-05T12:00:00.000Z	29 \| good	4.412 \| good	19.115 \| good	30.537 \| good	0.232 \| good	5.152 \| good	0.174 \| good
2025-12-05T13:00:00.000Z	30 \| good	3.975 \| good	16.837 \| good	31.926 \| good	0.203 \| good	6.509 \| good	0.192 \| good
2025-12-05T14:00:00.000Z	33 \| good	5.651 \| good	24.26 \| good	31.121 \| good	0.214 \| good	8.081 \| good	0.192 \| good
2025-12-05T15:00:00.000Z	33 \| good	5.675 \| good	24.594 \| good	30.015 \| good	0.213 \| good	9.187 \| good	0.186 \| good
2025-12-05T16:00:00.000Z	28 \| good	5.451 \| good	22.978 \| good	30.2 \| good	0.155 \| good	8.822 \| good	0.192 \| good
2025-12-05T17:00:00.000Z	33 \| good	5.686 \| good	24.872 \| good	28.542 \| good	0.179 \| good	8.493 \| good	0.186 \| good
2025-12-05T18:00:00.000Z	28 \| good	3.984 \| good	10.241 \| good	30 \| good	0.449 \| good	8.775 \| good	0.186 \| good
2025-12-05T19:00:00.000Z	38 \| good	7.18 \| good	32.974 \| good	27.884 \| good	0.169 \| good	10.986 \| good	0.24 \| good
2025-12-05T20:00:00.000Z	38 \| good	6.972 \| good	31.618 \| good	25.018 \| good	0.277 \| good	14.222 \| good	0.267 \| good
2025-12-05T21:00:00.000Z	44 \| good	7.811 \| good	33.195 \| good	22.555 \| good	0.266 \| good	16.507 \| good	0.261 \| good
2025-12-05T22:00:00.000Z	49 \| good	8.658 \| good	38.68 \| good	18.846 \| good	0.147 \| good	15.859 \| good	0.261 \| good
2025-12-05T23:00:00.000Z	49 \| good	8.755 \| good	36.548 \| good	16.917 \| good	0.151 \| good	17.335 \| good	0.274 \| good
2025-12-06T00:00:00.000Z	49 \| good	8.868 \| good	35.641 \| good	14.712 \| good	0.216 \| good	17.189 \| good	0.279 \| good
2025-12-06T01:00:00.000Z	52 \| moderate	10.434 \| good	42.802 \| good	14.758 \| good	0.142 \| good	20.959 \| good	0.225 \| good
2025-12-06T02:00:00.000Z	54 \| moderate	10.974 \| good	46.758 \| good	14.687 \| good	0.239 \| good	20.377 \| good	0.225 \| good
2025-12-06T03:00:00.000Z	56 \| moderate	11.782 \| good	50.162 \| good	14.28 \| good	0.193 \| good	14.572 \| good	0.225 \| good
2025-12-06T04:00:00.000Z	54 \| moderate	11.493 \| good	45.64 \| good	14.834 \| good	0.175 \| good	14.184 \| good	0.198 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	12.094 \| good	44.896 \| good	14.836 \| good	0.221 \| good	12.089 \| good	0.219 \| good
2025-12-06T06:00:00.000Z	58 \| moderate	13.053 \| fine	53.426 \| good	14.725 \| good	0.178 \| good	10.963 \| good	0.186 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.101 \| fine	59.34 \| fine	14.199 \| good	0.194 \| good	11.134 \| good	0.186 \| good
2025-12-06T08:00:00.000Z	58 \| moderate	12.752 \| fine	55.415 \| fine	12.211 \| good	0.171 \| good	13.246 \| good	0.225 \| good
2025-12-06T09:00:00.000Z	58 \| moderate	13.263 \| fine	55.135 \| fine	12.947 \| good	0.177 \| good	13.99 \| good	0.198 \| good
2025-12-06T10:00:00.000Z	60 \| moderate	14.458 \| fine	56.038 \| fine	12.589 \| good	0.224 \| good	11.547 \| good	0.198 \| good
2025-12-06T11:00:00.000Z	60 \| moderate	14.354 \| fine	61.594 \| fine	11.617 \| good	0.229 \| good	10.098 \| good	0.199 \| good
2025-12-06T12:00:00.000Z	60 \| moderate	14.474 \| fine	64.621 \| fine	8.451 \| good	0.122 \| good	10.86 \| good	0.247 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	13.633 \| fine	59.377 \| fine	9.509 \| good	0.127 \| good	12.269 \| good	0.253 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.486 \| fine	62.779 \| fine	10.922 \| good	0.155 \| good	16.849 \| good	0.347 \| good
2025-12-06T15:00:00.000Z	64 \| moderate	15.503 \| fine	64.121 \| fine	11.245 \| good	0.171 \| good	16.865 \| good	0.346 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.706 \| fine	64.314 \| fine	13.864 \| good	0.268 \| good	14.778 \| good	0.286 \| good
2025-12-06T17:00:00.000Z	58 \| moderate	13.384 \| fine	54.045 \| good	17.48 \| good	0.272 \| good	11.233 \| good	0.286 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.942 \| good	41.039 \| good	18.197 \| good	0.298 \| good	9.02 \| good	0.205 \| good
2025-12-06T19:00:00.000Z	49 \| good	8.619 \| good	32.739 \| good	18.555 \| good	0.234 \| good	7.48 \| good	0.138 \| good
2025-12-06T20:00:00.000Z	38 \| good	7.32 \| good	26.876 \| good	19.955 \| good	0.208 \| good	6.056 \| good	0.132 \| good
2025-12-06T21:00:00.000Z	33 \| good	6.314 \| good	22.067 \| good	21.807 \| good	0.174 \| good	6.696 \| good	0.125 \| good
2025-12-06T22:00:00.000Z	38 \| good	6.921 \| good	28.512 \| good	20.619 \| good	0.218 \| good	7.975 \| good	0.132 \| good
2025-12-06T23:00:00.000Z	44 \| good	8.06 \| good	32.751 \| good	18.487 \| good	0.195 \| good	10.809 \| good	0.125 \| good
2025-12-07T00:00:00.000Z	49 \| good	8.554 \| good	40.908 \| good	16.408 \| good	0.191 \| good	15.452 \| good	0.231 \| good
2025-12-07T01:00:00.000Z	52 \| moderate	9.737 \| good	46.269 \| good	13.923 \| good	0.25 \| good	18.053 \| good	0.298 \| good
2025-12-07T02:00:00.000Z	54 \| moderate	10.831 \| good	37.947 \| good	10.391 \| good	0.366 \| good	18.707 \| good	0.344 \| good
2025-12-07T03:00:00.000Z	58 \| moderate	13.474 \| fine	58.104 \| fine	8.391 \| good	0.327 \| good	19.997 \| good	0.338 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	14.737 \| fine	64.099 \| fine	8.539 \| good	0.547 \| good	18.24 \| good	0.371 \| good
2025-12-07T04:00:00.000Z	64 \| moderate	16.001 \| fine	64.894 \| fine	7.045 \| good	0.444 \| good	21.041 \| good	0.377 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	15.051 \| fine	66.737 \| fine	11.672 \| good	3.202 \| good	19.306 \| good	0.29 \| good
2025-12-07T05:00:00.000Z	56 \| moderate	12.215 \| fine	54.68 \| good	14.309 \| good	3.126 \| good	14.256 \| good	0.249 \| good
2025-12-07T06:00:00.000Z	54 \| moderate	11.483 \| good	50.93 \| good	14.134 \| good	3.05 \| good	9.207 \| good	0.209 \| good
2025-12-07T07:00:00.000Z	52 \| moderate	10.169 \| good	44.986 \| good	13.686 \| good	3.059 \| good	9.16 \| good	0.207 \| good
2025-12-07T08:00:00.000Z	54 \| moderate	10.907 \| good	47.993 \| good	12.743 \| good	3.068 \| good	9.114 \| good	0.205 \| good
2025-12-07T09:00:00.000Z	56 \| moderate	11.914 \| good	53.003 \| good	11.524 \| good	3.078 \| good	9.068 \| good	0.203 \| good
2025-12-07T10:00:00.000Z	58 \| moderate	13.332 \| fine	60.716 \| fine	9.83 \| good	3.236 \| good	12.84 \| good	0.226 \| good
2025-12-07T11:00:00.000Z	66 \| moderate	17.127 \| fine	76.217 \| fine	7.139 \| good	3.395 \| good	16.612 \| good	0.25 \| good
2025-12-07T12:00:00.000Z	69 \| moderate	19.14 \| fine	84.464 \| fine	5.406 \| good	3.553 \| good	20.383 \| good	0.274 \| good
2025-12-07T13:00:00.000Z	77 \| moderate	22.957 \| fine	100.423 \| fine	5.909 \| good	4.193 \| good	16.109 \| good	0.255 \| good
2025-12-07T14:00:00.000Z	71 \| moderate	20.328 \| fine	89.263 \| fine	10.681 \| good	4.834 \| good	11.835 \| good	0.236 \| good
2025-12-07T15:00:00.000Z	67 \| moderate	17.994 \| fine	79.382 \| fine	16.724 \| good	5.474 \| good	7.56 \| good	0.217 \| good
2025-12-07T16:00:00.000Z	62 \| moderate	14.826 \| fine	66.627 \| fine	21.785 \| good	5.742 \| good	7.169 \| good	0.213 \| good
2025-12-07T17:00:00.000Z	56 \| moderate	11.836 \| good	52.322 \| good	28.838 \| good	6.01 \| good	6.777 \| good	0.208 \| good
2025-12-07T18:00:00.000Z	52 \| moderate	10.131 \| good	44.949 \| good	31.945 \| good	6.278 \| good	6.386 \| good	0.204 \| good
2025-12-07T19:00:00.000Z	49 \| good	9.401 \| good	41.896 \| good	33.956 \| good	6.126 \| good	8.393 \| good	0.213 \| good
2025-12-07T20:00:00.000Z	54 \| moderate	10.717 \| good	47.427 \| good	33.245 \| good	5.974 \| good	10.4 \| good	0.221 \| good
2025-12-07T21:00:00.000Z	58 \| moderate	12.575 \| fine	56.865 \| fine	26.364 \| good	5.823 \| good	12.408 \| good	0.23 \| good
2025-12-07T22:00:00.000Z	60 \| moderate	14.48 \| fine	64.656 \| fine	17.021 \| good	5.501 \| good	18.269 \| good	0.304 \| good
2025-12-07T23:00:00.000Z	66 \| moderate	16.717 \| fine	74.646 \| fine	12.059 \| good	5.179 \| good	24.131 \| good	0.379 \| good
2025-12-08T00:00:00.000Z	67 \| moderate	18.334 \| fine	80.822 \| fine	5.893 \| good	4.857 \| good	29.993 \| good	0.454 \| good
2025-12-08T01:00:00.000Z	69 \| moderate	18.662 \| fine	82.405 \| fine	3.973 \| good	4.58 \| good	30.077 \| good	0.434 \| good
2025-12-08T02:00:00.000Z	67 \| moderate	17.528 \| fine	77.79 \| fine	4.967 \| good	4.303 \| good	30.162 \| good	0.413 \| good
2025-12-08T03:00:00.000Z	66 \| moderate	16.753 \| fine	74.301 \| fine	8.807 \| good	4.025 \| good	30.246 \| good	0.393 \| good
2025-12-08T04:00:00.000Z	60 \| moderate	14.376 \| fine	64.198 \| fine	11.349 \| good	4.03 \| good	25.652 \| good	0.352 \| good
2025-12-08T05:00:00.000Z	54 \| moderate	10.799 \| good	48.076 \| good	19.119 \| good	4.034 \| good	21.058 \| good	0.311 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.149 \| good	40.965 \| good	23.438 \| good	4.038 \| good	16.464 \| good	0.27 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.689 \| good	43.025 \| good	23.043 \| good	4.164 \| good	13.074 \| good	0.248 \| good
2025-12-08T08:00:00.000Z	27 \| good	5.378 \| good	23.192 \| good	23.81 \| good	4.291 \| good	9.685 \| good	0.226 \| good
2025-12-08T09:00:00.000Z	26 \| good	0.668 \| good	2.45 \| good	27.66 \| good	4.417 \| good	6.296 \| good	0.205 \| good
2025-12-08T10:00:00.000Z	24 \| good	0.275 \| good	0.995 \| good	26.383 \| good	3.286 \| good	5.64 \| good	0.191 \| good
2025-12-08T11:00:00.000Z	21 \| good	2.102 \| good	8.61 \| good	23.376 \| good	2.154 \| good	4.985 \| good	0.178 \| good
2025-12-08T12:00:00.000Z	19 \| good	2.792 \| good	11.418 \| good	20.618 \| good	1.023 \| good	4.329 \| good	0.165 \| good
2025-12-08T13:00:00.000Z	19 \| good	2.01 \| good	8.234 \| good	21.07 \| good	1.238 \| good	3.961 \| good	0.165 \| good
2025-12-08T14:00:00.000Z	23 \| good	1.737 \| good	7.355 \| good	24.902 \| good	1.453 \| good	3.593 \| good	0.165 \| good
2025-12-08T15:00:00.000Z	25 \| good	0.96 \| good	3.743 \| good	27.192 \| good	1.668 \| good	3.225 \| good	0.164 \| good
2025-12-08T16:00:00.000Z	25 \| good	0.852 \| good	3.179 \| good	27.113 \| good	1.731 \| good	2.971 \| good	0.162 \| good
2025-12-08T17:00:00.000Z	25 \| good	0.442 \| good	1.964 \| good	26.661 \| good	1.794 \| good	2.718 \| good	0.159 \| good
2025-12-08T18:00:00.000Z	25 \| good	0.386 \| good	1.564 \| good	26.931 \| good	1.857 \| good	2.464 \| good	0.157 \| good
2025-12-08T19:00:00.000Z	24 \| good	0.192 \| good	0.256 \| good	26.466 \| good	1.954 \| good	3.118 \| good	0.157 \| good
2025-12-08T20:00:00.000Z	26 \| good	0.816 \| good	3.033 \| good	27.7 \| good	2.052 \| good	3.773 \| good	0.157 \| good
2025-12-08T21:00:00.000Z	22 \| good	1.149 \| good	4.667 \| good	24.17 \| good	2.149 \| good	4.427 \| good	0.158 \| good
2025-12-08T22:00:00.000Z	18 \| good	2.389 \| good	9.669 \| good	19.09 \| good	2.21 \| good	8.618 \| good	0.184 \| good
2025-12-08T23:00:00.000Z	22 \| good	4.279 \| good	18.644 \| good	15.608 \| good	2.272 \| good	12.808 \| good	0.21 \| good
2025-12-09T00:00:00.000Z	49 \| good	9.005 \| good	9.688 \| good	18.676 \| good	2.352 \| good	17.226 \| good	0.237 \| good
2025-12-09T01:00:00.000Z	38 \| good	7.425 \| good	32.934 \| good	13.716 \| good	2.466 \| good	17.084 \| good	0.235 \| good
2025-12-09T02:00:00.000Z	49 \| good	8.714 \| good	38.221 \| good	11.12 \| good	2.599 \| good	17.169 \| good	0.234 \| good
2025-12-09T03:00:00.000Z	52 \| moderate	10.003 \| good	44.555 \| good	9.919 \| good	2.732 \| good	17.255 \| good	0.234 \| good

Real-time air quality index in Catonsville, Maryland today

Common air pollutants in Catonsville, Maryland

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Catonsville, Maryland air quality forecast and history

Empower business decisions with accurate air quality data

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

Air quality in nearby cities

Arbutus, Maryland

Ellicott City, Maryland

Ilchester, Maryland

Lochearn, Maryland

Elkridge, Maryland

Milford Mill, 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 Catonsville, Maryland updated?

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

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

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

Which pollutant is found most often in Catonsville, Maryland?

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

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

What are the current PM10 levels at Catonsville, Maryland?

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

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

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

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

What are the current PM₁₀ levels at Catonsville, Maryland?

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

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

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