What are the current PM10 levels at Catonsville, Maryland?

The current PM10 levels in Catonsville, Maryland are 18.617 μg/m3.

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

The current sulfur dioxide (SO2) levels in Catonsville, Maryland are 0.264 ppb.

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

The current ozone (O3) levels at Catonsville, Maryland is 49.203 ppm.

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

The current nitrogen dioxide (NO2) levels at Catonsville, Maryland is 4.78 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 4.34 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)

Good

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)

4.34 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

18.62 μg/m³

155

255

425

605+

Ozone (O₃)

49.20 ppb

201

201+

Sulfur Dioxide (SO₂)

0.26 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.78 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.14 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
2026-07-21T23:00:00.000Z	36 \| good	6.3 \| good	26.071 \| good	39.081 \| good	0.379 \| good	4.985 \| good	0.156 \| good
2026-07-22T00:00:00.000Z	31 \| good	4.915 \| good	19.252 \| good	32.871 \| good	0.344 \| good	5.033 \| good	0.22 \| good
2026-07-22T01:00:00.000Z	29 \| good	5.403 \| good	26.073 \| good	31.146 \| good	0.376 \| good	7.394 \| good	0.22 \| good
2026-07-22T02:00:00.000Z	30 \| good	4.853 \| good	20.267 \| good	31.527 \| good	0.375 \| good	7.546 \| good	0.234 \| good
2026-07-22T03:00:00.000Z	28 \| good	3.604 \| good	19.618 \| good	30.363 \| good	0.514 \| good	7.794 \| good	0.234 \| good
2026-07-22T04:00:00.000Z	23 \| good	3.593 \| good	15.631 \| good	25.384 \| good	0.431 \| good	8.119 \| good	0.242 \| good
2026-07-22T05:00:00.000Z	24 \| good	3.332 \| good	22.276 \| good	25.914 \| good	0.453 \| good	7.486 \| good	0.184 \| good
2026-07-22T06:00:00.000Z	25 \| good	3.121 \| good	21.049 \| good	27.311 \| good	0.361 \| good	6.366 \| good	0.206 \| good
2026-07-22T07:00:00.000Z	26 \| good	3.045 \| good	22.178 \| good	28.275 \| good	0.361 \| good	6.547 \| good	0.192 \| good
2026-07-22T08:00:00.000Z	22 \| good	2.118 \| good	9.748 \| good	24.468 \| good	0.406 \| good	6.149 \| good	0.192 \| good
2026-07-22T09:00:00.000Z	22 \| good	3.976 \| good	21.713 \| good	24.272 \| good	0.41 \| good	6.506 \| good	0.227 \| good
2026-07-22T10:00:00.000Z	22 \| good	3.525 \| good	15.05 \| good	20.325 \| good	0.364 \| good	10.403 \| good	0.242 \| good
2026-07-22T11:00:00.000Z	18 \| good	2.888 \| good	12.917 \| good	18.78 \| good	0.377 \| good	11.66 \| good	0.242 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.494 \| good	23.05 \| good	18.724 \| good	0.418 \| good	8.947 \| good	0.255 \| good
2026-07-22T13:00:00.000Z	22 \| good	4.17 \| good	21.528 \| good	18.84 \| good	0.414 \| good	10.012 \| good	0.255 \| good
2026-07-22T14:00:00.000Z	27 \| good	5.33 \| good	21.177 \| good	28.338 \| good	0.457 \| good	5.241 \| good	0.255 \| good
2026-07-22T15:00:00.000Z	33 \| good	5.789 \| good	23.916 \| good	34.468 \| good	0.444 \| good	5.204 \| good	0.255 \| good
2026-07-22T16:00:00.000Z	52 \| moderate	9.611 \| good	44.078 \| good	39.146 \| good	0.333 \| good	4.343 \| good	0.242 \| good
2026-07-22T17:00:00.000Z	49 \| good	8.823 \| good	37.637 \| good	41.66 \| good	0.286 \| good	4.043 \| good	0.227 \| good
2026-07-22T18:00:00.000Z	49 \| good	9.113 \| good	38.11 \| good	44.887 \| good	0.309 \| good	3.908 \| good	0.205 \| good
2026-07-22T19:00:00.000Z	49 \| good	8.956 \| good	41.083 \| good	46.487 \| good	0.295 \| good	3.488 \| good	0.205 \| good
2026-07-22T20:00:00.000Z	44 \| good	8.338 \| good	37.084 \| good	47.028 \| good	0.294 \| good	2.935 \| good	0.192 \| good
2026-07-22T21:00:00.000Z	44 \| good	8.468 \| good	34.796 \| good	47.236 \| good	0.276 \| good	2.803 \| good	0.205 \| good
2026-07-22T22:00:00.000Z	45 \| good	8.343 \| good	35.821 \| good	48.578 \| good	0.284 \| good	3.133 \| good	0.205 \| good
2026-07-22T23:00:00.000Z	44 \| good	8.176 \| good	30.972 \| good	46.282 \| good	0.39 \| good	3.433 \| good	0.227 \| good
2026-07-23T00:00:00.000Z	49 \| good	8.592 \| good	33.935 \| good	44.978 \| good	0.304 \| good	5.071 \| good	0.227 \| good
2026-07-23T01:00:00.000Z	44 \| good	7.935 \| good	31.611 \| good	41.086 \| good	0.297 \| good	4.833 \| good	0.227 \| good
2026-07-23T02:00:00.000Z	49 \| good	8.792 \| good	40.097 \| good	41.132 \| good	0.25 \| good	3.753 \| good	0.227 \| good
2026-07-23T03:00:00.000Z	24 \| good	0.447 \| good	1.591 \| good	25.79 \| good	0.547 \| good	7.363 \| good	0.222 \| good
2026-07-23T04:00:00.000Z	38 \| good	7.028 \| good	29.765 \| good	37.635 \| good	0.261 \| good	3.257 \| good	0.191 \| good
2026-07-23T05:00:00.000Z	38 \| good	6.627 \| good	29.924 \| good	35.509 \| good	0.26 \| good	3.295 \| good	0.179 \| good
2026-07-23T06:00:00.000Z	33 \| good	6.198 \| good	26.919 \| good	32.014 \| good	0.266 \| good	3.851 \| good	0.156 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.235 \| good	25.948 \| good	31.729 \| good	0.269 \| good	3.86 \| good	0.142 \| good
2026-07-23T08:00:00.000Z	27 \| good	5.192 \| good	21.489 \| good	27.961 \| good	0.342 \| good	5.302 \| good	0.142 \| good
2026-07-23T09:00:00.000Z	27 \| good	4.894 \| good	21.002 \| good	26.808 \| good	0.361 \| good	5.68 \| good	0.127 \| good
2026-07-23T10:00:00.000Z	23 \| good	4.473 \| good	19.558 \| good	25.443 \| good	0.361 \| good	7.377 \| good	0.142 \| good
2026-07-23T11:00:00.000Z	23 \| good	4.333 \| good	15.517 \| good	24.53 \| good	0.424 \| good	7.774 \| good	0.142 \| good
2026-07-23T12:00:00.000Z	22 \| good	4.162 \| good	17.612 \| good	23.995 \| good	0.42 \| good	6.481 \| good	0.142 \| good
2026-07-23T13:00:00.000Z	22 \| good	4.061 \| good	16.943 \| good	23.456 \| good	0.438 \| good	6.407 \| good	0.142 \| good
2026-07-23T14:00:00.000Z	28 \| good	3.547 \| good	17.133 \| good	29.604 \| good	0.267 \| good	3.619 \| good	0.142 \| good
2026-07-23T15:00:00.000Z	31 \| good	3.528 \| good	16.636 \| good	33.889 \| good	0.27 \| good	3.276 \| good	0.142 \| good
2026-07-23T16:00:00.000Z	35 \| good	3.295 \| good	13.053 \| good	38.252 \| good	0.274 \| good	2.67 \| good	0.142 \| good
2026-07-23T17:00:00.000Z	39 \| good	3.557 \| good	14.277 \| good	41.877 \| good	0.377 \| good	2.462 \| good	0.142 \| good
2026-07-23T18:00:00.000Z	42 \| good	4.179 \| good	17.288 \| good	44.751 \| good	0.278 \| good	3.285 \| good	0.142 \| good
2026-07-23T19:00:00.000Z	44 \| good	4.184 \| good	13.015 \| good	47.416 \| good	0.278 \| good	2.097 \| good	0.142 \| good
2026-07-23T20:00:00.000Z	45 \| good	5.155 \| good	21.86 \| good	49.093 \| good	0.241 \| good	2.906 \| good	0.142 \| good
2026-07-23T21:00:00.000Z	46 \| good	4.548 \| good	19.268 \| good	50.019 \| good	0.254 \| good	3.553 \| good	0.142 \| good
2026-07-23T22:00:00.000Z	47 \| good	4.01 \| good	17.15 \| good	50.986 \| good	0.271 \| good	3.741 \| good	0.156 \| good
2026-07-23T22:00:00.000Z	45 \| good	4.34 \| good	18.617 \| good	49.203 \| good	0.264 \| good	4.78 \| good	0.14 \| good
2026-07-23T23:00:00.000Z	41 \| good	0.38 \| good	1.255 \| good	44.402 \| good	0.542 \| good	1.915 \| good	0.142 \| good
2026-07-24T00:00:00.000Z	31 \| good	0.757 \| good	3.069 \| good	33.037 \| good	0.604 \| good	4.476 \| good	0.161 \| good
2026-07-24T01:00:00.000Z	27 \| good	1.188 \| good	4.887 \| good	29.2 \| good	0.706 \| good	9.033 \| good	0.192 \| good
2026-07-24T02:00:00.000Z	21 \| good	1.7 \| good	7.111 \| good	23.258 \| good	0.812 \| good	11.723 \| good	0.208 \| good
2026-07-24T03:00:00.000Z	18 \| good	2.252 \| good	9.378 \| good	18.955 \| good	0.88 \| good	15.286 \| good	0.229 \| good
2026-07-24T04:00:00.000Z	18 \| good	2.14 \| good	8.668 \| good	17.604 \| good	0.903 \| good	19.481 \| good	0.257 \| good
2026-07-24T05:00:00.000Z	21 \| good	2.332 \| good	9.932 \| good	17.722 \| good	0.88 \| good	22.017 \| good	0.278 \| good
2026-07-24T06:00:00.000Z	22 \| good	2.19 \| good	8.956 \| good	15.234 \| good	0.834 \| good	22.802 \| good	0.287 \| good
2026-07-24T07:00:00.000Z	21 \| good	3.465 \| good	15.149 \| good	13.436 \| good	0.762 \| good	22.251 \| good	0.285 \| good
2026-07-24T08:00:00.000Z	22 \| good	3.604 \| good	15.851 \| good	14.843 \| good	0.71 \| good	20.978 \| good	0.277 \| good
2026-07-24T09:00:00.000Z	22 \| good	4.389 \| good	19.075 \| good	14.2 \| good	0.681 \| good	19.189 \| good	0.265 \| good
2026-07-24T10:00:00.000Z	33 \| good	5.916 \| good	26.418 \| good	11.812 \| good	0.656 \| good	17.07 \| good	0.252 \| good
2026-07-24T11:00:00.000Z	38 \| good	6.721 \| good	29.543 \| good	12.51 \| good	0.644 \| good	13.472 \| good	0.237 \| good
2026-07-24T12:00:00.000Z	44 \| good	7.814 \| good	34.369 \| good	20.727 \| good	0.705 \| good	10.262 \| good	0.221 \| good
2026-07-24T13:00:00.000Z	38 \| good	6.897 \| good	30.456 \| good	31.684 \| good	0.813 \| good	5.828 \| good	0.183 \| good
2026-07-24T14:00:00.000Z	44 \| good	7.623 \| good	33.944 \| good	42.921 \| good	0.788 \| good	3.121 \| good	0.164 \| good
2026-07-24T15:00:00.000Z	48 \| good	6.504 \| good	28.967 \| good	51.611 \| good	0.671 \| good	1.655 \| good	0.155 \| good
2026-07-24T16:00:00.000Z	51 \| moderate	3.564 \| good	15.945 \| good	55.253 \| fine	0.579 \| good	1.093 \| good	0.149 \| good
2026-07-24T17:00:00.000Z	50 \| good	2.111 \| good	8.32 \| good	53.596 \| good	0.529 \| good	0.901 \| good	0.147 \| good
2026-07-24T18:00:00.000Z	47 \| good	1.796 \| good	7.307 \| good	50.641 \| good	0.484 \| good	0.849 \| good	0.146 \| good
2026-07-24T19:00:00.000Z	44 \| good	1.964 \| good	8.142 \| good	48.44 \| good	0.449 \| good	0.896 \| good	0.146 \| good
2026-07-24T20:00:00.000Z	46 \| good	0.95 \| good	3.522 \| good	49.629 \| good	0.423 \| good	1.015 \| good	0.146 \| good
2026-07-24T21:00:00.000Z	44 \| good	0.756 \| good	3.039 \| good	48.352 \| good	0.4 \| good	1.242 \| good	0.146 \| good
2026-07-24T22:00:00.000Z	40 \| good	1.093 \| good	4.203 \| good	42.698 \| good	0.381 \| good	1.725 \| good	0.149 \| good
2026-07-24T23:00:00.000Z	35 \| good	1.17 \| good	4.969 \| good	37.968 \| good	0.364 \| good	2.496 \| good	0.155 \| good
2026-07-25T00:00:00.000Z	28 \| good	1.37 \| good	5.227 \| good	29.927 \| good	0.349 \| good	3.131 \| good	0.157 \| good
2026-07-25T01:00:00.000Z	25 \| good	1.061 \| good	4.231 \| good	27.058 \| good	0.326 \| good	3.21 \| good	0.152 \| good
2026-07-25T02:00:00.000Z	26 \| good	0.737 \| good	2.547 \| good	27.588 \| good	0.317 \| good	3.469 \| good	0.149 \| good
2026-07-25T03:00:00.000Z	25 \| good	0.678 \| good	2.285 \| good	27.107 \| good	0.321 \| good	4.152 \| good	0.149 \| good
2026-07-25T04:00:00.000Z	24 \| good	0.646 \| good	2.196 \| good	25.503 \| good	0.329 \| good	4.68 \| good	0.149 \| good
2026-07-25T05:00:00.000Z	21 \| good	0.595 \| good	2.174 \| good	22.984 \| good	0.335 \| good	5.006 \| good	0.148 \| good
2026-07-25T06:00:00.000Z	20 \| good	0.93 \| good	3.738 \| good	21.649 \| good	0.343 \| good	5.373 \| good	0.147 \| good
2026-07-25T07:00:00.000Z	17 \| good	1.242 \| good	4.813 \| good	17.517 \| good	0.356 \| good	6.204 \| good	0.148 \| good
2026-07-25T08:00:00.000Z	17 \| good	1.132 \| good	4.271 \| good	17.933 \| good	0.381 \| good	7.537 \| good	0.152 \| good
2026-07-25T09:00:00.000Z	11 \| good	1.874 \| good	7.848 \| good	12.365 \| good	0.396 \| good	8.584 \| good	0.155 \| good
2026-07-25T10:00:00.000Z	16 \| good	3.477 \| good	15.724 \| good	11.127 \| good	0.425 \| good	8.582 \| good	0.154 \| good
2026-07-25T11:00:00.000Z	22 \| good	4.359 \| good	18.664 \| good	14.196 \| good	0.444 \| good	8.032 \| good	0.155 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.836 \| good	34.347 \| good	18.991 \| good	0.519 \| good	6.092 \| good	0.151 \| good
2026-07-25T13:00:00.000Z	27 \| good	5.276 \| good	22.849 \| good	24.851 \| good	0.518 \| good	3.087 \| good	0.138 \| good
2026-07-25T14:00:00.000Z	30 \| good	3.25 \| good	14.098 \| good	32.181 \| good	0.431 \| good	1.873 \| good	0.135 \| good
2026-07-25T15:00:00.000Z	36 \| good	1.341 \| good	5.215 \| good	38.918 \| good	0.352 \| good	1.153 \| good	0.133 \| good
2026-07-25T16:00:00.000Z	40 \| good	0.942 \| good	3.513 \| good	42.878 \| good	0.299 \| good	0.827 \| good	0.133 \| good
2026-07-25T17:00:00.000Z	43 \| good	0.987 \| good	4.088 \| good	46.179 \| good	0.264 \| good	0.691 \| good	0.133 \| good
2026-07-25T18:00:00.000Z	46 \| good	1.181 \| good	4.908 \| good	49.719 \| good	0.241 \| good	0.644 \| good	0.133 \| good
2026-07-25T19:00:00.000Z	48 \| good	2.275 \| good	9.235 \| good	52.019 \| good	0.23 \| good	0.659 \| good	0.134 \| good
2026-07-25T20:00:00.000Z	49 \| good	1.988 \| good	8.174 \| good	52.87 \| good	0.228 \| good	0.691 \| good	0.134 \| good
2026-07-25T21:00:00.000Z	48 \| good	2.101 \| good	8.441 \| good	52.142 \| good	0.23 \| good	0.784 \| good	0.134 \| good
2026-07-25T22:00:00.000Z	45 \| good	1.869 \| good	7.524 \| good	48.67 \| good	0.238 \| good	1.013 \| good	0.136 \| good

Catonsville

Empower business decisions with accurate air quality data

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

0.14ppm

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 02:00:00 on 2026-07-23.

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

The best air quality in Catonsville, Maryland was recorded at 01:00:00 on 2026-07-23.

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

The real-time air quality index in Catonsville, Maryland is 45, currently categorized as Good.

Which pollutant is found most often in Catonsville, Maryland?

The most common pollutant in Catonsville, Maryland is O3.

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 4.34 μg/m³.

What are the current PM₁₀ levels at Catonsville, Maryland?

The current PM₁₀ levels in Catonsville, Maryland are 18.617 μg/m³.

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

The current carbon monoxide (CO) level in Catonsville, Maryland is 0.14 ppm.

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

The current sulfur dioxide (SO₂) levels in Catonsville, Maryland are 0.264 ppb.

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

The current ozone (O₃) levels at Catonsville, Maryland is 49.203 ppm.

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

The current nitrogen dioxide (NO₂) levels at Catonsville, Maryland is 4.78 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T23:00:00.000Z	36 \| good	6.3 \| good	26.071 \| good	39.081 \| good	0.379 \| good	4.985 \| good	0.156 \| good
2026-07-22T00:00:00.000Z	31 \| good	4.915 \| good	19.252 \| good	32.871 \| good	0.344 \| good	5.033 \| good	0.22 \| good
2026-07-22T01:00:00.000Z	29 \| good	5.403 \| good	26.073 \| good	31.146 \| good	0.376 \| good	7.394 \| good	0.22 \| good
2026-07-22T02:00:00.000Z	30 \| good	4.853 \| good	20.267 \| good	31.527 \| good	0.375 \| good	7.546 \| good	0.234 \| good
2026-07-22T03:00:00.000Z	28 \| good	3.604 \| good	19.618 \| good	30.363 \| good	0.514 \| good	7.794 \| good	0.234 \| good
2026-07-22T04:00:00.000Z	23 \| good	3.593 \| good	15.631 \| good	25.384 \| good	0.431 \| good	8.119 \| good	0.242 \| good
2026-07-22T05:00:00.000Z	24 \| good	3.332 \| good	22.276 \| good	25.914 \| good	0.453 \| good	7.486 \| good	0.184 \| good
2026-07-22T06:00:00.000Z	25 \| good	3.121 \| good	21.049 \| good	27.311 \| good	0.361 \| good	6.366 \| good	0.206 \| good
2026-07-22T07:00:00.000Z	26 \| good	3.045 \| good	22.178 \| good	28.275 \| good	0.361 \| good	6.547 \| good	0.192 \| good
2026-07-22T08:00:00.000Z	22 \| good	2.118 \| good	9.748 \| good	24.468 \| good	0.406 \| good	6.149 \| good	0.192 \| good
2026-07-22T09:00:00.000Z	22 \| good	3.976 \| good	21.713 \| good	24.272 \| good	0.41 \| good	6.506 \| good	0.227 \| good
2026-07-22T10:00:00.000Z	22 \| good	3.525 \| good	15.05 \| good	20.325 \| good	0.364 \| good	10.403 \| good	0.242 \| good
2026-07-22T11:00:00.000Z	18 \| good	2.888 \| good	12.917 \| good	18.78 \| good	0.377 \| good	11.66 \| good	0.242 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.494 \| good	23.05 \| good	18.724 \| good	0.418 \| good	8.947 \| good	0.255 \| good
2026-07-22T13:00:00.000Z	22 \| good	4.17 \| good	21.528 \| good	18.84 \| good	0.414 \| good	10.012 \| good	0.255 \| good
2026-07-22T14:00:00.000Z	27 \| good	5.33 \| good	21.177 \| good	28.338 \| good	0.457 \| good	5.241 \| good	0.255 \| good
2026-07-22T15:00:00.000Z	33 \| good	5.789 \| good	23.916 \| good	34.468 \| good	0.444 \| good	5.204 \| good	0.255 \| good
2026-07-22T16:00:00.000Z	52 \| moderate	9.611 \| good	44.078 \| good	39.146 \| good	0.333 \| good	4.343 \| good	0.242 \| good
2026-07-22T17:00:00.000Z	49 \| good	8.823 \| good	37.637 \| good	41.66 \| good	0.286 \| good	4.043 \| good	0.227 \| good
2026-07-22T18:00:00.000Z	49 \| good	9.113 \| good	38.11 \| good	44.887 \| good	0.309 \| good	3.908 \| good	0.205 \| good
2026-07-22T19:00:00.000Z	49 \| good	8.956 \| good	41.083 \| good	46.487 \| good	0.295 \| good	3.488 \| good	0.205 \| good
2026-07-22T20:00:00.000Z	44 \| good	8.338 \| good	37.084 \| good	47.028 \| good	0.294 \| good	2.935 \| good	0.192 \| good
2026-07-22T21:00:00.000Z	44 \| good	8.468 \| good	34.796 \| good	47.236 \| good	0.276 \| good	2.803 \| good	0.205 \| good
2026-07-22T22:00:00.000Z	45 \| good	8.343 \| good	35.821 \| good	48.578 \| good	0.284 \| good	3.133 \| good	0.205 \| good
2026-07-22T23:00:00.000Z	44 \| good	8.176 \| good	30.972 \| good	46.282 \| good	0.39 \| good	3.433 \| good	0.227 \| good
2026-07-23T00:00:00.000Z	49 \| good	8.592 \| good	33.935 \| good	44.978 \| good	0.304 \| good	5.071 \| good	0.227 \| good
2026-07-23T01:00:00.000Z	44 \| good	7.935 \| good	31.611 \| good	41.086 \| good	0.297 \| good	4.833 \| good	0.227 \| good
2026-07-23T02:00:00.000Z	49 \| good	8.792 \| good	40.097 \| good	41.132 \| good	0.25 \| good	3.753 \| good	0.227 \| good
2026-07-23T03:00:00.000Z	24 \| good	0.447 \| good	1.591 \| good	25.79 \| good	0.547 \| good	7.363 \| good	0.222 \| good
2026-07-23T04:00:00.000Z	38 \| good	7.028 \| good	29.765 \| good	37.635 \| good	0.261 \| good	3.257 \| good	0.191 \| good
2026-07-23T05:00:00.000Z	38 \| good	6.627 \| good	29.924 \| good	35.509 \| good	0.26 \| good	3.295 \| good	0.179 \| good
2026-07-23T06:00:00.000Z	33 \| good	6.198 \| good	26.919 \| good	32.014 \| good	0.266 \| good	3.851 \| good	0.156 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.235 \| good	25.948 \| good	31.729 \| good	0.269 \| good	3.86 \| good	0.142 \| good
2026-07-23T08:00:00.000Z	27 \| good	5.192 \| good	21.489 \| good	27.961 \| good	0.342 \| good	5.302 \| good	0.142 \| good
2026-07-23T09:00:00.000Z	27 \| good	4.894 \| good	21.002 \| good	26.808 \| good	0.361 \| good	5.68 \| good	0.127 \| good
2026-07-23T10:00:00.000Z	23 \| good	4.473 \| good	19.558 \| good	25.443 \| good	0.361 \| good	7.377 \| good	0.142 \| good
2026-07-23T11:00:00.000Z	23 \| good	4.333 \| good	15.517 \| good	24.53 \| good	0.424 \| good	7.774 \| good	0.142 \| good
2026-07-23T12:00:00.000Z	22 \| good	4.162 \| good	17.612 \| good	23.995 \| good	0.42 \| good	6.481 \| good	0.142 \| good
2026-07-23T13:00:00.000Z	22 \| good	4.061 \| good	16.943 \| good	23.456 \| good	0.438 \| good	6.407 \| good	0.142 \| good
2026-07-23T14:00:00.000Z	28 \| good	3.547 \| good	17.133 \| good	29.604 \| good	0.267 \| good	3.619 \| good	0.142 \| good
2026-07-23T15:00:00.000Z	31 \| good	3.528 \| good	16.636 \| good	33.889 \| good	0.27 \| good	3.276 \| good	0.142 \| good
2026-07-23T16:00:00.000Z	35 \| good	3.295 \| good	13.053 \| good	38.252 \| good	0.274 \| good	2.67 \| good	0.142 \| good
2026-07-23T17:00:00.000Z	39 \| good	3.557 \| good	14.277 \| good	41.877 \| good	0.377 \| good	2.462 \| good	0.142 \| good
2026-07-23T18:00:00.000Z	42 \| good	4.179 \| good	17.288 \| good	44.751 \| good	0.278 \| good	3.285 \| good	0.142 \| good
2026-07-23T19:00:00.000Z	44 \| good	4.184 \| good	13.015 \| good	47.416 \| good	0.278 \| good	2.097 \| good	0.142 \| good
2026-07-23T20:00:00.000Z	45 \| good	5.155 \| good	21.86 \| good	49.093 \| good	0.241 \| good	2.906 \| good	0.142 \| good
2026-07-23T21:00:00.000Z	46 \| good	4.548 \| good	19.268 \| good	50.019 \| good	0.254 \| good	3.553 \| good	0.142 \| good
2026-07-23T22:00:00.000Z	47 \| good	4.01 \| good	17.15 \| good	50.986 \| good	0.271 \| good	3.741 \| good	0.156 \| good
2026-07-23T22:00:00.000Z	45 \| good	4.34 \| good	18.617 \| good	49.203 \| good	0.264 \| good	4.78 \| good	0.14 \| good
2026-07-23T23:00:00.000Z	41 \| good	0.38 \| good	1.255 \| good	44.402 \| good	0.542 \| good	1.915 \| good	0.142 \| good
2026-07-24T00:00:00.000Z	31 \| good	0.757 \| good	3.069 \| good	33.037 \| good	0.604 \| good	4.476 \| good	0.161 \| good
2026-07-24T01:00:00.000Z	27 \| good	1.188 \| good	4.887 \| good	29.2 \| good	0.706 \| good	9.033 \| good	0.192 \| good
2026-07-24T02:00:00.000Z	21 \| good	1.7 \| good	7.111 \| good	23.258 \| good	0.812 \| good	11.723 \| good	0.208 \| good
2026-07-24T03:00:00.000Z	18 \| good	2.252 \| good	9.378 \| good	18.955 \| good	0.88 \| good	15.286 \| good	0.229 \| good
2026-07-24T04:00:00.000Z	18 \| good	2.14 \| good	8.668 \| good	17.604 \| good	0.903 \| good	19.481 \| good	0.257 \| good
2026-07-24T05:00:00.000Z	21 \| good	2.332 \| good	9.932 \| good	17.722 \| good	0.88 \| good	22.017 \| good	0.278 \| good
2026-07-24T06:00:00.000Z	22 \| good	2.19 \| good	8.956 \| good	15.234 \| good	0.834 \| good	22.802 \| good	0.287 \| good
2026-07-24T07:00:00.000Z	21 \| good	3.465 \| good	15.149 \| good	13.436 \| good	0.762 \| good	22.251 \| good	0.285 \| good
2026-07-24T08:00:00.000Z	22 \| good	3.604 \| good	15.851 \| good	14.843 \| good	0.71 \| good	20.978 \| good	0.277 \| good
2026-07-24T09:00:00.000Z	22 \| good	4.389 \| good	19.075 \| good	14.2 \| good	0.681 \| good	19.189 \| good	0.265 \| good
2026-07-24T10:00:00.000Z	33 \| good	5.916 \| good	26.418 \| good	11.812 \| good	0.656 \| good	17.07 \| good	0.252 \| good
2026-07-24T11:00:00.000Z	38 \| good	6.721 \| good	29.543 \| good	12.51 \| good	0.644 \| good	13.472 \| good	0.237 \| good
2026-07-24T12:00:00.000Z	44 \| good	7.814 \| good	34.369 \| good	20.727 \| good	0.705 \| good	10.262 \| good	0.221 \| good
2026-07-24T13:00:00.000Z	38 \| good	6.897 \| good	30.456 \| good	31.684 \| good	0.813 \| good	5.828 \| good	0.183 \| good
2026-07-24T14:00:00.000Z	44 \| good	7.623 \| good	33.944 \| good	42.921 \| good	0.788 \| good	3.121 \| good	0.164 \| good
2026-07-24T15:00:00.000Z	48 \| good	6.504 \| good	28.967 \| good	51.611 \| good	0.671 \| good	1.655 \| good	0.155 \| good
2026-07-24T16:00:00.000Z	51 \| moderate	3.564 \| good	15.945 \| good	55.253 \| fine	0.579 \| good	1.093 \| good	0.149 \| good
2026-07-24T17:00:00.000Z	50 \| good	2.111 \| good	8.32 \| good	53.596 \| good	0.529 \| good	0.901 \| good	0.147 \| good
2026-07-24T18:00:00.000Z	47 \| good	1.796 \| good	7.307 \| good	50.641 \| good	0.484 \| good	0.849 \| good	0.146 \| good
2026-07-24T19:00:00.000Z	44 \| good	1.964 \| good	8.142 \| good	48.44 \| good	0.449 \| good	0.896 \| good	0.146 \| good
2026-07-24T20:00:00.000Z	46 \| good	0.95 \| good	3.522 \| good	49.629 \| good	0.423 \| good	1.015 \| good	0.146 \| good
2026-07-24T21:00:00.000Z	44 \| good	0.756 \| good	3.039 \| good	48.352 \| good	0.4 \| good	1.242 \| good	0.146 \| good
2026-07-24T22:00:00.000Z	40 \| good	1.093 \| good	4.203 \| good	42.698 \| good	0.381 \| good	1.725 \| good	0.149 \| good
2026-07-24T23:00:00.000Z	35 \| good	1.17 \| good	4.969 \| good	37.968 \| good	0.364 \| good	2.496 \| good	0.155 \| good
2026-07-25T00:00:00.000Z	28 \| good	1.37 \| good	5.227 \| good	29.927 \| good	0.349 \| good	3.131 \| good	0.157 \| good
2026-07-25T01:00:00.000Z	25 \| good	1.061 \| good	4.231 \| good	27.058 \| good	0.326 \| good	3.21 \| good	0.152 \| good
2026-07-25T02:00:00.000Z	26 \| good	0.737 \| good	2.547 \| good	27.588 \| good	0.317 \| good	3.469 \| good	0.149 \| good
2026-07-25T03:00:00.000Z	25 \| good	0.678 \| good	2.285 \| good	27.107 \| good	0.321 \| good	4.152 \| good	0.149 \| good
2026-07-25T04:00:00.000Z	24 \| good	0.646 \| good	2.196 \| good	25.503 \| good	0.329 \| good	4.68 \| good	0.149 \| good
2026-07-25T05:00:00.000Z	21 \| good	0.595 \| good	2.174 \| good	22.984 \| good	0.335 \| good	5.006 \| good	0.148 \| good
2026-07-25T06:00:00.000Z	20 \| good	0.93 \| good	3.738 \| good	21.649 \| good	0.343 \| good	5.373 \| good	0.147 \| good
2026-07-25T07:00:00.000Z	17 \| good	1.242 \| good	4.813 \| good	17.517 \| good	0.356 \| good	6.204 \| good	0.148 \| good
2026-07-25T08:00:00.000Z	17 \| good	1.132 \| good	4.271 \| good	17.933 \| good	0.381 \| good	7.537 \| good	0.152 \| good
2026-07-25T09:00:00.000Z	11 \| good	1.874 \| good	7.848 \| good	12.365 \| good	0.396 \| good	8.584 \| good	0.155 \| good
2026-07-25T10:00:00.000Z	16 \| good	3.477 \| good	15.724 \| good	11.127 \| good	0.425 \| good	8.582 \| good	0.154 \| good
2026-07-25T11:00:00.000Z	22 \| good	4.359 \| good	18.664 \| good	14.196 \| good	0.444 \| good	8.032 \| good	0.155 \| good
2026-07-25T12:00:00.000Z	44 \| good	7.836 \| good	34.347 \| good	18.991 \| good	0.519 \| good	6.092 \| good	0.151 \| good
2026-07-25T13:00:00.000Z	27 \| good	5.276 \| good	22.849 \| good	24.851 \| good	0.518 \| good	3.087 \| good	0.138 \| good
2026-07-25T14:00:00.000Z	30 \| good	3.25 \| good	14.098 \| good	32.181 \| good	0.431 \| good	1.873 \| good	0.135 \| good
2026-07-25T15:00:00.000Z	36 \| good	1.341 \| good	5.215 \| good	38.918 \| good	0.352 \| good	1.153 \| good	0.133 \| good
2026-07-25T16:00:00.000Z	40 \| good	0.942 \| good	3.513 \| good	42.878 \| good	0.299 \| good	0.827 \| good	0.133 \| good
2026-07-25T17:00:00.000Z	43 \| good	0.987 \| good	4.088 \| good	46.179 \| good	0.264 \| good	0.691 \| good	0.133 \| good
2026-07-25T18:00:00.000Z	46 \| good	1.181 \| good	4.908 \| good	49.719 \| good	0.241 \| good	0.644 \| good	0.133 \| good
2026-07-25T19:00:00.000Z	48 \| good	2.275 \| good	9.235 \| good	52.019 \| good	0.23 \| good	0.659 \| good	0.134 \| good
2026-07-25T20:00:00.000Z	49 \| good	1.988 \| good	8.174 \| good	52.87 \| good	0.228 \| good	0.691 \| good	0.134 \| good
2026-07-25T21:00:00.000Z	48 \| good	2.101 \| good	8.441 \| good	52.142 \| good	0.23 \| good	0.784 \| good	0.134 \| good
2026-07-25T22:00:00.000Z	45 \| good	1.869 \| good	7.524 \| good	48.67 \| good	0.238 \| good	1.013 \| good	0.136 \| 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?