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

The PM10 concentration in San Marcos, Texas is 25.844 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 0.807 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 60.759 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 6.642 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 8.584 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)

Moderate

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)

8.97 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

32.61 μg/m³

155

255

425

605+

Ozone (O₃)

60.78 ppb

201

201+

Sulfur Dioxide (SO₂)

0.81 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

7.00 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.41 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
2026-10-20T23:00:00.000Z	50 \| good	6.296 \| good	24.55 \| good	54.014 \| good	0.788 \| good	7.348 \| good	0.388 \| good
2026-10-21T00:00:00.000Z	49 \| good	6.686 \| good	27.581 \| good	52.712 \| good	0.768 \| good	8.938 \| good	0.451 \| good
2026-10-21T01:00:00.000Z	42 \| good	5.89 \| good	20.026 \| good	45.2 \| good	0.749 \| good	9.249 \| good	0.51 \| good
2026-10-21T02:00:00.000Z	36 \| good	5.607 \| good	24.118 \| good	38.724 \| good	0.749 \| good	7.901 \| good	0.448 \| good
2026-10-21T03:00:00.000Z	12 \| good	2.111 \| good	8.786 \| good	13.385 \| good	0.773 \| good	5.138 \| good	0.147 \| good
2026-10-21T04:00:00.000Z	33 \| good	6.002 \| good	16.274 \| good	25.147 \| good	0.807 \| good	12.261 \| good	0.385 \| good
2026-10-21T05:00:00.000Z	38 \| good	6.807 \| good	22.788 \| good	20.521 \| good	0.787 \| good	12.295 \| good	0.385 \| good
2026-10-21T06:00:00.000Z	33 \| good	5.684 \| good	23.873 \| good	17.765 \| good	0.787 \| good	13.466 \| good	0.344 \| good
2026-10-21T07:00:00.000Z	39 \| good	5.785 \| good	41.586 \| good	21.793 \| good	0.787 \| good	10.109 \| good	0.344 \| good
2026-10-21T08:00:00.000Z	38 \| good	7.406 \| good	29.151 \| good	17.866 \| good	0.692 \| good	8.921 \| good	0.303 \| good
2026-10-21T09:00:00.000Z	27 \| good	4.755 \| good	19.369 \| good	20.489 \| good	0.73 \| good	5.688 \| good	0.325 \| good
2026-10-21T10:00:00.000Z	33 \| good	6.017 \| good	18.362 \| good	15.539 \| good	0.73 \| good	6.135 \| good	0.347 \| good
2026-10-21T11:00:00.000Z	27 \| good	4.527 \| good	15.49 \| good	15.723 \| good	0.806 \| good	7.977 \| good	0.388 \| good
2026-10-21T12:00:00.000Z	44 \| good	7.687 \| good	33.774 \| good	14.851 \| good	0.787 \| good	10.386 \| good	0.429 \| good
2026-10-21T13:00:00.000Z	25 \| good	3.986 \| good	13.246 \| good	26.811 \| good	0.768 \| good	11.677 \| good	0.469 \| good
2026-10-21T14:00:00.000Z	30 \| good	4.614 \| good	31.735 \| good	24.147 \| good	0.787 \| good	15.528 \| good	0.57 \| good
2026-10-21T15:00:00.000Z	38 \| good	6.521 \| good	15.8 \| good	28.813 \| good	0.787 \| good	13.556 \| good	0.529 \| good
2026-10-21T16:00:00.000Z	54 \| moderate	10.885 \| good	31.93 \| good	27.691 \| good	1.012 \| good	10.446 \| good	0.491 \| good
2026-10-21T17:00:00.000Z	49 \| good	9.456 \| good	45.439 \| good	33.454 \| good	1.07 \| good	8.517 \| good	0.391 \| good
2026-10-21T18:00:00.000Z	54 \| moderate	10.748 \| good	39.845 \| good	36.857 \| good	0.826 \| good	8.304 \| good	0.372 \| good
2026-10-21T19:00:00.000Z	60 \| moderate	13.594 \| fine	44.722 \| good	43.025 \| good	0.846 \| good	6.538 \| good	0.391 \| good
2026-10-21T20:00:00.000Z	52 \| moderate	9.74 \| good	44.14 \| good	45.016 \| good	0.865 \| good	6.612 \| good	0.35 \| good
2026-10-21T21:00:00.000Z	49 \| good	9.416 \| good	35.056 \| good	51.369 \| good	0.846 \| good	6.561 \| good	0.394 \| good
2026-10-21T22:00:00.000Z	71 \| moderate	8.414 \| good	35.347 \| good	61.235 \| fine	0.826 \| good	7.378 \| good	0.391 \| good
2026-10-21T23:00:00.000Z	80 \| moderate	8.966 \| good	33.159 \| good	63.64 \| fine	0.826 \| good	7.785 \| good	0.432 \| good
2026-10-22T00:00:00.000Z	49 \| good	8.527 \| good	30.922 \| good	51.669 \| good	0.807 \| good	9.518 \| good	0.473 \| good
2026-10-22T01:00:00.000Z	44 \| good	6.7 \| good	23.008 \| good	47.737 \| good	0.768 \| good	10.426 \| good	0.47 \| good
2026-10-22T02:00:00.000Z	38 \| good	7.178 \| good	21.692 \| good	41.01 \| good	0.768 \| good	9.261 \| good	0.51 \| good
2026-10-22T03:00:00.000Z	16 \| good	3.271 \| good	13.561 \| good	11.831 \| good	0.664 \| good	6.852 \| good	0.164 \| good
2026-10-22T04:00:00.000Z	44 \| good	7.603 \| good	23.998 \| good	36.138 \| good	0.826 \| good	7.452 \| good	0.447 \| good
2026-10-22T05:00:00.000Z	38 \| good	7.061 \| good	19.479 \| good	26.368 \| good	0.806 \| good	7.796 \| good	0.447 \| good
2026-10-22T06:00:00.000Z	38 \| good	7.034 \| good	34.836 \| good	23.339 \| good	0.787 \| good	6.843 \| good	0.425 \| good
2026-10-22T07:00:00.000Z	44 \| good	7.989 \| good	31.078 \| good	23.45 \| good	0.768 \| good	6.377 \| good	0.385 \| good
2026-10-22T08:00:00.000Z	38 \| good	6.835 \| good	27.773 \| good	12.713 \| good	0.768 \| good	5.532 \| good	0.366 \| good
2026-10-22T09:00:00.000Z	33 \| good	6.402 \| good	30.298 \| good	11.685 \| good	0.787 \| good	7.684 \| good	0.344 \| good
2026-10-22T10:00:00.000Z	33 \| good	6.234 \| good	27.032 \| good	18.166 \| good	0.787 \| good	11.707 \| good	0.366 \| good
2026-10-22T11:00:00.000Z	38 \| good	6.712 \| good	20.857 \| good	12.421 \| good	0.768 \| good	10.219 \| good	0.429 \| good
2026-10-22T12:00:00.000Z	52 \| moderate	9.929 \| good	27.751 \| good	11.321 \| good	0.749 \| good	14.252 \| good	0.463 \| good
2026-10-22T13:00:00.000Z	49 \| good	8.928 \| good	28.026 \| good	16.134 \| good	0.865 \| good	19.849 \| good	0.566 \| good
2026-10-22T14:00:00.000Z	38 \| good	6.984 \| good	18.493 \| good	16.859 \| good	1.012 \| good	21.914 \| good	0.673 \| good
2026-10-22T15:00:00.000Z	38 \| good	6.71 \| good	32.113 \| good	27.564 \| good	1.069 \| good	19.377 \| good	0.558 \| good
2026-10-22T16:00:00.000Z	44 \| good	7.939 \| good	34.629 \| good	28.138 \| good	1.05 \| good	14.926 \| good	0.598 \| good
2026-10-22T17:00:00.000Z	58 \| moderate	12.657 \| fine	33.642 \| good	34.887 \| good	0.826 \| good	12.103 \| good	0.558 \| good
2026-10-22T18:00:00.000Z	58 \| moderate	13.146 \| fine	68.168 \| fine	43.147 \| good	0.826 \| good	9.223 \| good	0.401 \| good
2026-10-22T19:00:00.000Z	58 \| moderate	12.659 \| fine	52.53 \| good	52.878 \| good	0.826 \| good	7.992 \| good	0.359 \| good
2026-10-22T20:00:00.000Z	56 \| moderate	11.999 \| good	30.821 \| good	55.31 \| fine	0.826 \| good	8.042 \| good	0.394 \| good
2026-10-22T21:00:00.000Z	71 \| moderate	8.584 \| good	25.844 \| good	60.759 \| fine	0.807 \| good	6.642 \| good	0.394 \| good
2026-10-22T22:00:00.000Z	71 \| moderate	8.973 \| good	32.614 \| good	60.778 \| fine	0.807 \| good	7.005 \| good	0.413 \| good
2026-10-22T22:00:00.000Z	71 \| moderate	8.973 \| good	32.614 \| good	60.778 \| fine	0.807 \| good	7.005 \| good	0.413 \| good
2026-10-22T23:00:00.000Z	64 \| moderate	1.932 \| good	7.809 \| good	59.122 \| fine	0.773 \| good	1.549 \| good	0.163 \| good
2026-10-23T00:00:00.000Z	44 \| good	2.265 \| good	9.337 \| good	47.736 \| good	0.782 \| good	3.761 \| good	0.179 \| good
2026-10-23T01:00:00.000Z	28 \| good	1.203 \| good	5.035 \| good	29.891 \| good	0.824 \| good	5.491 \| good	0.191 \| good
2026-10-23T02:00:00.000Z	38 \| good	7.473 \| good	32.93 \| good	20.676 \| good	0.896 \| good	5.93 \| good	0.194 \| good
2026-10-23T03:00:00.000Z	33 \| good	6.419 \| good	28.496 \| good	20.57 \| good	0.963 \| good	5.946 \| good	0.193 \| good
2026-10-23T04:00:00.000Z	49 \| good	8.951 \| good	39.112 \| good	17.298 \| good	0.988 \| good	5.714 \| good	0.191 \| good
2026-10-23T05:00:00.000Z	27 \| good	5.415 \| good	23.28 \| good	15.569 \| good	0.972 \| good	4.729 \| good	0.183 \| good
2026-10-23T06:00:00.000Z	52 \| moderate	10.303 \| good	45.378 \| good	15.701 \| good	0.898 \| good	3.55 \| good	0.171 \| good
2026-10-23T07:00:00.000Z	52 \| moderate	9.881 \| good	43.775 \| good	12.363 \| good	0.783 \| good	2.941 \| good	0.161 \| good
2026-10-23T08:00:00.000Z	38 \| good	7.355 \| good	32.381 \| good	9.49 \| good	0.685 \| good	2.881 \| good	0.154 \| good
2026-10-23T09:00:00.000Z	33 \| good	6.18 \| good	27.404 \| good	11.565 \| good	0.635 \| good	3.164 \| good	0.151 \| good
2026-10-23T10:00:00.000Z	44 \| good	7.607 \| good	33.502 \| good	12.571 \| good	0.627 \| good	3.627 \| good	0.15 \| good
2026-10-23T11:00:00.000Z	11 \| good	1.561 \| good	6.215 \| good	12.12 \| good	0.647 \| good	4.216 \| good	0.151 \| good
2026-10-23T12:00:00.000Z	38 \| good	7.102 \| good	31.487 \| good	14.048 \| good	0.683 \| good	5.007 \| good	0.154 \| good
2026-10-23T13:00:00.000Z	20 \| good	3.491 \| good	15.354 \| good	22.144 \| good	0.72 \| good	6.883 \| good	0.163 \| good
2026-10-23T14:00:00.000Z	33 \| good	6.203 \| good	26.99 \| good	35.666 \| good	0.672 \| good	7.958 \| good	0.178 \| good
2026-10-23T15:00:00.000Z	44 \| good	6.743 \| good	30.052 \| good	46.644 \| good	0.755 \| good	2.946 \| good	0.141 \| good
2026-10-23T16:00:00.000Z	46 \| good	7.602 \| good	33.211 \| good	49.91 \| good	0.575 \| good	1.308 \| good	0.122 \| good
2026-10-23T17:00:00.000Z	52 \| moderate	10.194 \| good	45.323 \| good	54.888 \| good	0.433 \| good	0.731 \| good	0.115 \| good
2026-10-23T18:00:00.000Z	61 \| moderate	8.391 \| good	36.932 \| good	58.342 \| fine	0.383 \| good	0.529 \| good	0.115 \| good
2026-10-23T19:00:00.000Z	71 \| moderate	8.697 \| good	38.07 \| good	61.024 \| fine	0.361 \| good	0.456 \| good	0.116 \| good
2026-10-23T20:00:00.000Z	74 \| moderate	7.124 \| good	31.441 \| good	62.123 \| fine	0.357 \| good	0.446 \| good	0.117 \| good
2026-10-23T21:00:00.000Z	67 \| moderate	3.599 \| good	15.758 \| good	60.165 \| fine	0.367 \| good	0.475 \| good	0.118 \| good
2026-10-23T22:00:00.000Z	77 \| moderate	6.904 \| good	30.452 \| good	62.574 \| fine	0.386 \| good	0.557 \| good	0.121 \| good
2026-10-23T23:00:00.000Z	71 \| moderate	4.547 \| good	19.566 \| good	61.445 \| fine	0.411 \| good	1.049 \| good	0.126 \| good
2026-10-24T00:00:00.000Z	46 \| good	3.672 \| good	16.337 \| good	49.747 \| good	0.434 \| good	2.686 \| good	0.138 \| good
2026-10-24T01:00:00.000Z	26 \| good	1.415 \| good	5.988 \| good	27.712 \| good	0.459 \| good	3.379 \| good	0.143 \| good
2026-10-24T02:00:00.000Z	49 \| good	9.165 \| good	41.153 \| good	21.358 \| good	0.477 \| good	3.05 \| good	0.143 \| good
2026-10-24T03:00:00.000Z	44 \| good	8.454 \| good	37.052 \| good	22.723 \| good	0.46 \| good	2.306 \| good	0.14 \| good
2026-10-24T04:00:00.000Z	38 \| good	7.319 \| good	32.023 \| good	21.307 \| good	0.425 \| good	1.756 \| good	0.137 \| good
2026-10-24T05:00:00.000Z	19 \| good	2.994 \| good	12.601 \| good	20.453 \| good	0.403 \| good	1.574 \| good	0.135 \| good
2026-10-24T06:00:00.000Z	38 \| good	7.416 \| good	32.469 \| good	22.346 \| good	0.394 \| good	1.621 \| good	0.134 \| good
2026-10-24T07:00:00.000Z	38 \| good	6.529 \| good	28.92 \| good	15.89 \| good	0.392 \| good	1.815 \| good	0.135 \| good
2026-10-24T08:00:00.000Z	22 \| good	3.986 \| good	17.211 \| good	12.675 \| good	0.398 \| good	2.007 \| good	0.136 \| good
2026-10-24T09:00:00.000Z	13 \| good	2.204 \| good	9.198 \| good	13.539 \| good	0.408 \| good	2.201 \| good	0.138 \| good
2026-10-24T10:00:00.000Z	22 \| good	3.554 \| good	15.479 \| good	17.023 \| good	0.418 \| good	2.381 \| good	0.14 \| good
2026-10-24T11:00:00.000Z	16 \| good	1.445 \| good	6.13 \| good	16.897 \| good	0.424 \| good	2.475 \| good	0.142 \| good
2026-10-24T12:00:00.000Z	18 \| good	2.849 \| good	11.699 \| good	18.739 \| good	0.433 \| good	2.51 \| good	0.144 \| good
2026-10-24T13:00:00.000Z	24 \| good	1.307 \| good	5.233 \| good	25.913 \| good	0.437 \| good	2.965 \| good	0.148 \| good
2026-10-24T14:00:00.000Z	33 \| good	1.759 \| good	7.184 \| good	36.121 \| good	0.421 \| good	2.938 \| good	0.152 \| good
2026-10-24T15:00:00.000Z	43 \| good	2.325 \| good	9.323 \| good	45.854 \| good	0.429 \| good	1.664 \| good	0.148 \| good
2026-10-24T16:00:00.000Z	39 \| good	3.862 \| good	17.177 \| good	41.835 \| good	0.35 \| good	0.826 \| good	0.14 \| good
2026-10-24T17:00:00.000Z	42 \| good	7.073 \| good	31.387 \| good	44.954 \| good	0.256 \| good	0.455 \| good	0.129 \| good
2026-10-24T18:00:00.000Z	44 \| good	6.708 \| good	29.967 \| good	48.176 \| good	0.207 \| good	0.353 \| good	0.124 \| good
2026-10-24T19:00:00.000Z	51 \| moderate	8.155 \| good	36.08 \| good	54.589 \| good	0.179 \| good	0.327 \| good	0.122 \| good
2026-10-24T20:00:00.000Z	50 \| good	6.639 \| good	29.417 \| good	54.059 \| good	0.163 \| good	0.343 \| good	0.121 \| good
2026-10-24T21:00:00.000Z	54 \| moderate	5.873 \| good	25.179 \| good	55.824 \| fine	0.152 \| good	0.345 \| good	0.119 \| good
2026-10-24T22:00:00.000Z	61 \| moderate	8.996 \| good	40.227 \| good	57.603 \| fine	0.145 \| good	0.387 \| good	0.117 \| good

San Marcos

Get reliable air quality data to drive your business

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

0.39ppm

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 11:00:00 on 2026-10-21.

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 03:00:00 on 2026-10-22.

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

As of now, the AQI in San Marcos, Texas is 71, indicating Moderate 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 8.584 μg/m³.

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

The PM₁₀ concentration in San Marcos, Texas is 25.844 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 0.394 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 0.807 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 60.759 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 6.642 ppb.

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