What is the PM10 level in San Marcos, Texas at the moment?

The PM10 concentration in San Marcos, Texas is 23.178 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in San Marcos, Texas at the moment?

Currently, San Marcos, Texas has a sulfur dioxide (SO2) concentration of 1.209 ppb.

What is the ozone (O3) level in San Marcos, Texas at the moment?

The current ozone (O3) level in San Marcos, Texas at the moment is 30.171 ppm.

What is the nitrogen dioxide (NO2) level in San Marcos, Texas at the moment?

Nitrogen dioxide (NO2) level in San Marcos, Texas at the moment is 4.995 ppb.

Live air quality index in San Marcos, Texas today

Q: What is the PM2.5 level in San Marcos, Texas at the moment?

PM2.5 levels in San Marcos, Texas are currently 5.243 μg/m3.

Stay updated with real-time air quality in San Marcos, Texas 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

San Marcos, Texas

Last updated: ... (Local time)

Major air pollutants in San Marcos, Texas

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.14 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

8.03 μg/m³

155

255

425

605+

Ozone (O₃)

26.05 ppb

201

201+

Sulfur Dioxide (SO₂)

1.10 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.48 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.31 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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San Marcos, Texas

Scroll To Air Quality Map

Track live San Marcos, Texas air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T14:00:00.000Z	33 \| good	6.391 \| good	29.042 \| good	27.114 \| good	0.664 \| good	15.194 \| good	0.643 \| good
2025-10-23T15:00:00.000Z	44 \| good	7.89 \| good	34.913 \| good	30.127 \| good	0.836 \| good	12.896 \| good	0.433 \| good
2025-10-23T16:00:00.000Z	44 \| good	7.788 \| good	33.967 \| good	31.114 \| good	0.85 \| good	10.878 \| good	0.376 \| good
2025-10-23T17:00:00.000Z	33 \| good	6.434 \| good	29.198 \| good	31.154 \| good	0.814 \| good	7.955 \| good	0.418 \| good
2025-10-23T18:00:00.000Z	33 \| good	5.762 \| good	25.35 \| good	34.079 \| good	0.856 \| good	9.61 \| good	0.376 \| good
2025-10-23T19:00:00.000Z	38 \| good	7.135 \| good	32.173 \| good	35.101 \| good	1.045 \| good	7.033 \| good	0.363 \| good
2025-10-23T20:00:00.000Z	34 \| good	6.369 \| good	28.339 \| good	37.096 \| good	1.043 \| good	6.904 \| good	0.367 \| good
2025-10-23T21:00:00.000Z	36 \| good	6.329 \| good	28.121 \| good	39.08 \| good	1.06 \| good	7.859 \| good	0.367 \| good
2025-10-23T22:00:00.000Z	36 \| good	4.846 \| good	21.382 \| good	39.102 \| good	1.062 \| good	8.528 \| good	0.389 \| good
2025-10-23T23:00:00.000Z	35 \| good	4.631 \| good	20.105 \| good	38.118 \| good	1.078 \| good	7.212 \| good	0.402 \| good
2025-10-24T00:00:00.000Z	29 \| good	4.482 \| good	19.399 \| good	31.216 \| good	1.119 \| good	7.34 \| good	0.398 \| good
2025-10-24T01:00:00.000Z	29 \| good	2.514 \| good	10.534 \| good	31.164 \| good	1.212 \| good	7.69 \| good	0.385 \| good
2025-10-24T02:00:00.000Z	27 \| good	4.381 \| good	19.296 \| good	29.141 \| good	1.37 \| good	6.365 \| good	0.378 \| good
2025-10-24T03:00:00.000Z	27 \| good	4.855 \| good	21 \| good	25.744 \| good	0.291 \| good	2.436 \| good	0.133 \| good
2025-10-24T04:00:00.000Z	28 \| good	4.333 \| good	19.139 \| good	30.082 \| good	1.297 \| good	5.251 \| good	0.394 \| good
2025-10-24T05:00:00.000Z	27 \| good	4.535 \| good	20.128 \| good	29.067 \| good	0.857 \| good	4.505 \| good	0.387 \| good
2025-10-24T06:00:00.000Z	22 \| good	3.919 \| good	17.121 \| good	23.153 \| good	0.837 \| good	4.502 \| good	0.387 \| good
2025-10-24T07:00:00.000Z	27 \| good	5.102 \| good	21.976 \| good	22.16 \| good	0.84 \| good	4.7 \| good	0.364 \| good
2025-10-24T08:00:00.000Z	27 \| good	5.106 \| good	22.02 \| good	20.172 \| good	0.775 \| good	3.293 \| good	0.348 \| good
2025-10-24T09:00:00.000Z	33 \| good	5.713 \| good	24.993 \| good	19.159 \| good	0.776 \| good	3.628 \| good	0.348 \| good
2025-10-24T10:00:00.000Z	27 \| good	5.404 \| good	23.017 \| good	19.124 \| good	0.775 \| good	3.874 \| good	0.348 \| good
2025-10-24T11:00:00.000Z	38 \| good	6.773 \| good	29.873 \| good	17.114 \| good	0.775 \| good	4.722 \| good	0.371 \| good
2025-10-24T12:00:00.000Z	38 \| good	6.708 \| good	29.873 \| good	17.095 \| good	0.779 \| good	5.623 \| good	0.378 \| good
2025-10-24T13:00:00.000Z	38 \| good	6.711 \| good	30.02 \| good	17.095 \| good	0.779 \| good	6.237 \| good	0.4 \| good
2025-10-24T14:00:00.000Z	38 \| good	6.623 \| good	30.025 \| good	21.091 \| good	0.962 \| good	6.965 \| good	0.385 \| good
2025-10-24T15:00:00.000Z	33 \| good	6.368 \| good	28.831 \| good	21.14 \| good	0.832 \| good	6.684 \| good	0.388 \| good
2025-10-24T16:00:00.000Z	49 \| good	8.931 \| good	40.585 \| good	24.125 \| good	0.747 \| good	6.384 \| good	0.31 \| good
2025-10-24T17:00:00.000Z	33 \| good	5.791 \| good	25.053 \| good	25.154 \| good	0.831 \| good	5.815 \| good	0.333 \| good
2025-10-24T18:00:00.000Z	24 \| good	4.236 \| good	19.165 \| good	26.174 \| good	1.052 \| good	6.913 \| good	0.317 \| good
2025-10-24T19:00:00.000Z	28 \| good	3.557 \| good	16.244 \| good	30.108 \| good	0.97 \| good	6.616 \| good	0.36 \| good
2025-10-24T20:00:00.000Z	31 \| good	4.53 \| good	20.228 \| good	33.105 \| good	1.033 \| good	5.88 \| good	0.382 \| good
2025-10-24T21:00:00.000Z	30 \| good	4.541 \| good	20.157 \| good	32.151 \| good	1.075 \| good	5.053 \| good	0.382 \| good
2025-10-24T22:00:00.000Z	30 \| good	4.224 \| good	19.155 \| good	32.139 \| good	1.3 \| good	5.66 \| good	0.398 \| good
2025-10-24T23:00:00.000Z	28 \| good	5.243 \| good	23.178 \| good	30.171 \| good	1.209 \| good	4.995 \| good	0.398 \| good
2025-10-25T00:00:00.000Z	25 \| good	0.697 \| good	2.568 \| good	27.158 \| good	1.012 \| good	4.973 \| good	0.398 \| good
2025-10-25T01:00:00.000Z	24 \| good	2.181 \| good	9.308 \| good	26.161 \| good	1.213 \| good	4.321 \| good	0.375 \| good
2025-10-25T02:00:00.000Z	23 \| good	3.451 \| good	15.272 \| good	25.144 \| good	1.171 \| good	5.835 \| good	0.353 \| good
2025-10-25T03:00:00.000Z	33 \| good	6.178 \| good	27.644 \| good	25.921 \| good	0.185 \| good	1.447 \| good	0.11 \| good
2025-10-25T04:00:00.000Z	20 \| good	2.912 \| good	12.124 \| good	22.183 \| good	0.748 \| good	4.949 \| good	0.333 \| good
2025-10-25T05:00:00.000Z	27 \| good	4.596 \| good	19.946 \| good	23.165 \| good	0.847 \| good	3.614 \| good	0.31 \| good
2025-10-25T06:00:00.000Z	33 \| good	6.457 \| good	28.709 \| good	27.098 \| good	1.069 \| good	3.51 \| good	0.31 \| good
2025-10-25T07:00:00.000Z	23 \| good	2.509 \| good	10.003 \| good	25.139 \| good	0.807 \| good	2.806 \| good	0.287 \| good
2025-10-25T08:00:00.000Z	23 \| good	4.376 \| good	18.92 \| good	25.143 \| good	0.842 \| good	3.055 \| good	0.287 \| good
2025-10-25T09:00:00.000Z	23 \| good	1.621 \| good	7.105 \| good	25.062 \| good	1.231 \| good	2.895 \| good	0.287 \| good
2025-10-25T10:00:00.000Z	23 \| good	3.566 \| good	15.803 \| good	25.05 \| good	1.077 \| good	2.673 \| good	0.287 \| good
2025-10-25T11:00:00.000Z	24 \| good	1.706 \| good	7.031 \| good	26.014 \| good	1.056 \| good	3.072 \| good	0.31 \| good
2025-10-25T12:00:00.000Z	24 \| good	2.141 \| good	8.027 \| good	26.046 \| good	1.099 \| good	3.483 \| good	0.31 \| good
2025-10-25T13:00:00.000Z	24 \| good	2.141 \| good	8.027 \| good	26.046 \| good	1.099 \| good	3.483 \| good	0.31 \| good
2025-10-25T00:00:00.000Z	31 \| good	0.5 \| good	1.968 \| good	34.365 \| good	0.169 \| good	1.786 \| good	0.116 \| good
2025-10-25T01:00:00.000Z	27 \| good	1.962 \| good	8.033 \| good	29.175 \| good	0.17 \| good	1.679 \| good	0.114 \| good
2025-10-25T02:00:00.000Z	38 \| good	7.441 \| good	33.105 \| good	28.724 \| good	0.17 \| good	1.572 \| good	0.112 \| good
2025-10-25T03:00:00.000Z	33 \| good	5.63 \| good	24.181 \| good	26.678 \| good	0.171 \| good	1.464 \| good	0.109 \| good
2025-10-25T04:00:00.000Z	22 \| good	2.71 \| good	11.257 \| good	24.201 \| good	0.184 \| good	1.446 \| good	0.108 \| good
2025-10-25T05:00:00.000Z	22 \| good	3.888 \| good	16.971 \| good	23.461 \| good	0.197 \| good	1.428 \| good	0.106 \| good
2025-10-25T06:00:00.000Z	27 \| good	5.478 \| good	23.51 \| good	24.035 \| good	0.209 \| good	1.409 \| good	0.105 \| good
2025-10-25T07:00:00.000Z	23 \| good	2.386 \| good	9.922 \| good	24.77 \| good	0.225 \| good	1.401 \| good	0.104 \| good
2025-10-25T08:00:00.000Z	24 \| good	3.415 \| good	14.967 \| good	26.26 \| good	0.241 \| good	1.393 \| good	0.102 \| good
2025-10-25T09:00:00.000Z	29 \| good	4.784 \| good	20.593 \| good	31.479 \| good	0.256 \| good	1.385 \| good	0.101 \| good
2025-10-25T10:00:00.000Z	29 \| good	3.978 \| good	17.345 \| good	30.928 \| good	0.267 \| good	1.469 \| good	0.1 \| good
2025-10-25T11:00:00.000Z	23 \| good	2.766 \| good	11.296 \| good	25.369 \| good	0.277 \| good	1.553 \| good	0.099 \| good
2025-10-25T12:00:00.000Z	27 \| good	4.532 \| good	19.646 \| good	19.658 \| good	0.287 \| good	1.637 \| good	0.099 \| good
2025-10-25T13:00:00.000Z	22 \| good	3.52 \| good	15.831 \| good	22.384 \| good	0.316 \| good	1.78 \| good	0.101 \| good
2025-10-25T14:00:00.000Z	38 \| good	7.017 \| good	31.213 \| good	24.981 \| good	0.346 \| good	1.924 \| good	0.104 \| good
2025-10-25T15:00:00.000Z	27 \| good	4.576 \| good	19.965 \| good	28.366 \| good	0.375 \| good	2.067 \| good	0.107 \| good
2025-10-25T16:00:00.000Z	32 \| good	4.238 \| good	18.445 \| good	35.004 \| good	0.344 \| good	1.636 \| good	0.105 \| good
2025-10-25T17:00:00.000Z	39 \| good	3.969 \| good	17.583 \| good	41.637 \| good	0.313 \| good	1.205 \| good	0.103 \| good
2025-10-25T18:00:00.000Z	40 \| good	4.735 \| good	20.697 \| good	43.074 \| good	0.282 \| good	0.774 \| good	0.101 \| good
2025-10-25T19:00:00.000Z	40 \| good	4.986 \| good	21.644 \| good	43.116 \| good	0.3 \| good	0.913 \| good	0.102 \| good
2025-10-25T20:00:00.000Z	39 \| good	5.779 \| good	25.084 \| good	41.719 \| good	0.318 \| good	1.053 \| good	0.103 \| good
2025-10-25T21:00:00.000Z	36 \| good	5 \| good	21.47 \| good	38.627 \| good	0.335 \| good	1.192 \| good	0.104 \| good
2025-10-25T22:00:00.000Z	36 \| good	5.646 \| good	24.31 \| good	38.723 \| good	0.399 \| good	2.028 \| good	0.113 \| good
2025-10-25T23:00:00.000Z	27 \| good	4.276 \| good	18.979 \| good	29.145 \| good	0.463 \| good	2.864 \| good	0.121 \| good
2025-10-26T00:00:00.000Z	27 \| good	2.134 \| good	8.543 \| good	28.563 \| good	0.527 \| good	3.7 \| good	0.129 \| good
2025-10-26T01:00:00.000Z	24 \| good	3.555 \| good	15.528 \| good	25.789 \| good	0.529 \| good	3.996 \| good	0.132 \| good
2025-10-26T02:00:00.000Z	38 \| good	6.616 \| good	29.289 \| good	29.184 \| good	0.531 \| good	4.291 \| good	0.135 \| good
2025-10-26T03:00:00.000Z	27 \| good	5.168 \| good	22.553 \| good	24.574 \| good	0.534 \| good	4.586 \| good	0.138 \| good
2025-10-26T04:00:00.000Z	22 \| good	3.833 \| good	16.979 \| good	22.385 \| good	0.566 \| good	5.554 \| good	0.148 \| good
2025-10-26T05:00:00.000Z	22 \| good	3.742 \| good	16.126 \| good	19.474 \| good	0.599 \| good	6.523 \| good	0.157 \| good
2025-10-26T06:00:00.000Z	33 \| good	5.833 \| good	25.181 \| good	12.882 \| good	0.631 \| good	7.491 \| good	0.167 \| good
2025-10-26T07:00:00.000Z	22 \| good	4.022 \| good	17.957 \| good	14.32 \| good	0.61 \| good	6.291 \| good	0.158 \| good
2025-10-26T08:00:00.000Z	22 \| good	4.325 \| good	18.919 \| good	16.412 \| good	0.588 \| good	5.092 \| good	0.15 \| good
2025-10-26T09:00:00.000Z	27 \| good	4.679 \| good	20.313 \| good	24.813 \| good	0.566 \| good	3.892 \| good	0.141 \| good
2025-10-26T10:00:00.000Z	23 \| good	3.425 \| good	15.249 \| good	25.008 \| good	0.516 \| good	3.428 \| good	0.137 \| good
2025-10-26T11:00:00.000Z	23 \| good	3.972 \| good	17.593 \| good	24.878 \| good	0.466 \| good	2.965 \| good	0.133 \| good
2025-10-26T12:00:00.000Z	33 \| good	6.342 \| good	28.217 \| good	21.214 \| good	0.416 \| good	2.501 \| good	0.129 \| good
2025-10-26T13:00:00.000Z	22 \| good	4.02 \| good	17.831 \| good	17.262 \| good	0.391 \| good	2.493 \| good	0.13 \| good
2025-10-26T14:00:00.000Z	44 \| good	7.918 \| good	34.769 \| good	18.919 \| good	0.365 \| good	2.485 \| good	0.13 \| good
2025-10-26T15:00:00.000Z	38 \| good	7.057 \| good	31.05 \| good	23.994 \| good	0.339 \| good	2.477 \| good	0.131 \| good
2025-10-26T16:00:00.000Z	29 \| good	4.463 \| good	19.475 \| good	30.753 \| good	0.345 \| good	1.94 \| good	0.129 \| good
2025-10-26T17:00:00.000Z	35 \| good	5.434 \| good	23.131 \| good	38.336 \| good	0.352 \| good	1.404 \| good	0.127 \| good
2025-10-26T18:00:00.000Z	36 \| good	5.117 \| good	22.05 \| good	38.542 \| good	0.358 \| good	0.867 \| good	0.126 \| good
2025-10-26T19:00:00.000Z	38 \| good	3.935 \| good	17.305 \| good	41.364 \| good	0.346 \| good	0.803 \| good	0.124 \| good
2025-10-26T20:00:00.000Z	37 \| good	4.71 \| good	20.577 \| good	39.883 \| good	0.333 \| good	0.739 \| good	0.122 \| good
2025-10-26T21:00:00.000Z	33 \| good	5.957 \| good	26.219 \| good	31.129 \| good	0.32 \| good	0.676 \| good	0.121 \| good
2025-10-26T22:00:00.000Z	33 \| good	5.95 \| good	26.846 \| good	28.399 \| good	0.354 \| good	2.526 \| good	0.138 \| good
2025-10-26T23:00:00.000Z	28 \| good	4.288 \| good	18.969 \| good	29.797 \| good	0.389 \| good	4.377 \| good	0.156 \| good

San Marcos

Get reliable air quality data to drive your business

San Marcos, Texas air quality map: Stay updated on AQI near you

0.40ppm

How accurate is Texas, USA air quality data?

Air quality and pollutant data for Texas, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for San Marcos, Texas?

The air quality information for San Marcos, Texas is updated every hour for accuracy.

What time in the last 24 hours was the air quality in San Marcos, Texas at its worst?

In the past 24 hours, the air quality in San Marcos, Texas was at its worst at 04:00:00 on 2025-10-24.

When did San Marcos, Texas experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in San Marcos, Texas was observed at 06:00:00 on 2025-10-24.

What is the AQI in San Marcos, Texas right now?

As of now, the AQI in San Marcos, Texas is 28, indicating Good conditions.

What is the most common type of pollution in San Marcos, Texas?

San Marcos, Texas air has the highest levels of O3.

What should I do in case of poor air quality in San Marcos, Texas?

Poor air quality in San Marcos, Texas means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in San Marcos, Texas at the moment?

PM_2.5 levels in San Marcos, Texas are currently 5.243 μg/m³.

What is the PM₁₀ level in San Marcos, Texas at the moment?

The PM₁₀ concentration in San Marcos, Texas is 23.178 μg/m³ at the moment.

What is the carbon monoxide (CO) level in San Marcos, Texas at the moment?

The current carbon monoxide (CO) concentration in San Marcos, Texas is 0.398 ppm.

What is the sulfur dioxide (SO₂) level in San Marcos, Texas at the moment?

Currently, San Marcos, Texas has a sulfur dioxide (SO₂) concentration of 1.209 ppb.

What is the ozone (O₃) level in San Marcos, Texas at the moment?

The current ozone (O₃) level in San Marcos, Texas at the moment is 30.171 ppm.

What is the nitrogen dioxide (NO₂) level in San Marcos, Texas at the moment?

Nitrogen dioxide (NO₂) level in San Marcos, Texas at the moment is 4.995 ppb.

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