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

The PM10 concentration in San Marcos, Texas is 40.873 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 0.67 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 18.111 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 3.483 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 9.383 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)

9.38 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

40.87 μg/m³

155

255

425

605+

Ozone (O₃)

18.11 ppb

201

201+

Sulfur Dioxide (SO₂)

0.67 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.48 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 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
2026-08-16T19:00:00.000Z	54 \| moderate	10.656 \| good	48.015 \| good	26.367 \| good	0.511 \| good	1.082 \| good	0.287 \| good
2026-08-16T20:00:00.000Z	52 \| moderate	10.184 \| good	36.06 \| good	29.427 \| good	0.511 \| good	1.189 \| good	0.287 \| good
2026-08-16T21:00:00.000Z	52 \| moderate	9.571 \| good	38.879 \| good	32.385 \| good	0.624 \| good	1.401 \| good	0.287 \| good
2026-08-16T22:00:00.000Z	44 \| good	7.957 \| good	28.258 \| good	36.381 \| good	0.493 \| good	1.917 \| good	0.294 \| good
2026-08-16T23:00:00.000Z	49 \| good	8.733 \| good	43.652 \| good	38.169 \| good	0.624 \| good	3.02 \| good	0.294 \| good
2026-08-17T00:00:00.000Z	44 \| good	8.445 \| good	42.798 \| good	41.707 \| good	0.749 \| good	2.337 \| good	0.294 \| good
2026-08-17T01:00:00.000Z	38 \| good	6.603 \| good	32.091 \| good	41.014 \| good	0.749 \| good	2.298 \| good	0.31 \| good
2026-08-17T02:00:00.000Z	33 \| good	6.033 \| good	30.774 \| good	32.394 \| good	0.277 \| good	5.149 \| good	0.401 \| good
2026-08-17T03:00:00.000Z	58 \| moderate	13.305 \| fine	59.695 \| fine	17.825 \| good	0.179 \| good	2.612 \| good	0.103 \| good
2026-08-17T04:00:00.000Z	38 \| good	7.047 \| good	26.553 \| good	30.64 \| good	0.434 \| good	5.376 \| good	0.355 \| good
2026-08-17T05:00:00.000Z	52 \| moderate	10.372 \| good	37.076 \| good	21.984 \| good	0.567 \| good	4.164 \| good	0.333 \| good
2026-08-17T06:00:00.000Z	38 \| good	7.357 \| good	24.596 \| good	22.035 \| good	0.971 \| good	4.901 \| good	0.333 \| good
2026-08-17T07:00:00.000Z	37 \| good	6.145 \| good	39.668 \| good	20.349 \| good	0.567 \| good	4.54 \| good	0.31 \| good
2026-08-17T08:00:00.000Z	33 \| good	5.868 \| good	28.336 \| good	17.161 \| good	0.486 \| good	2.702 \| good	0.29 \| good
2026-08-17T09:00:00.000Z	27 \| good	5.21 \| good	25.633 \| good	16.575 \| good	0.325 \| good	3.192 \| good	0.293 \| good
2026-08-17T10:00:00.000Z	27 \| good	5.039 \| good	24.88 \| good	17.388 \| good	0.49 \| good	4.513 \| good	0.336 \| good
2026-08-17T11:00:00.000Z	33 \| good	5.893 \| good	25.16 \| good	12.151 \| good	0.43 \| good	3.694 \| good	0.355 \| good
2026-08-17T12:00:00.000Z	27 \| good	5.078 \| good	26.833 \| good	11.867 \| good	0.409 \| good	2.51 \| good	0.332 \| good
2026-08-17T13:00:00.000Z	33 \| good	5.617 \| good	31.718 \| good	11.043 \| good	0.447 \| good	4.795 \| good	0.355 \| good
2026-08-17T14:00:00.000Z	44 \| good	8.168 \| good	32.698 \| good	13.256 \| good	0.426 \| good	5.849 \| good	0.358 \| good
2026-08-17T15:00:00.000Z	49 \| good	9.417 \| good	43.378 \| good	12.179 \| good	0.895 \| good	4.368 \| good	0.401 \| good
2026-08-17T16:00:00.000Z	44 \| good	7.632 \| good	37.614 \| good	17.882 \| good	0.59 \| good	4.25 \| good	0.378 \| good
2026-08-17T17:00:00.000Z	44 \| good	7.937 \| good	35.163 \| good	22.305 \| good	0.631 \| good	4.249 \| good	0.378 \| good
2026-08-17T18:00:00.000Z	49 \| good	9.273 \| good	40.722 \| good	28.433 \| good	0.683 \| good	4.352 \| good	0.375 \| good
2026-08-17T19:00:00.000Z	49 \| good	9.081 \| good	38.114 \| good	31.011 \| good	0.683 \| good	4.33 \| good	0.355 \| good
2026-08-17T20:00:00.000Z	44 \| good	8.301 \| good	37.803 \| good	31.525 \| good	0.96 \| good	2.762 \| good	0.333 \| good
2026-08-17T21:00:00.000Z	44 \| good	8.033 \| good	40.984 \| good	41.998 \| good	0.906 \| good	2.054 \| good	0.31 \| good
2026-08-17T22:00:00.000Z	48 \| good	7.26 \| good	31.152 \| good	51.852 \| good	1.139 \| good	2.034 \| good	0.31 \| good
2026-08-17T23:00:00.000Z	49 \| good	7.248 \| good	32.116 \| good	52.515 \| good	1.588 \| good	3.439 \| good	0.31 \| good
2026-08-18T00:00:00.000Z	48 \| good	6.529 \| good	34.488 \| good	52.054 \| good	2.73 \| good	3.316 \| good	0.31 \| good
2026-08-18T01:00:00.000Z	44 \| good	6.124 \| good	29.204 \| good	46.81 \| good	1.308 \| good	4.225 \| good	0.394 \| good
2026-08-18T02:00:00.000Z	44 \| good	5.896 \| good	31.206 \| good	46.695 \| good	0.864 \| good	4.364 \| good	0.411 \| good
2026-08-18T03:00:00.000Z	49 \| good	8.988 \| good	40.174 \| good	26.487 \| good	0.864 \| good	4.826 \| good	0.397 \| good
2026-08-18T04:00:00.000Z	27 \| good	5.181 \| good	27.132 \| good	28.735 \| good	1.345 \| good	3.87 \| good	0.341 \| good
2026-08-18T05:00:00.000Z	44 \| good	7.867 \| good	29.327 \| good	25.766 \| good	1.312 \| good	3.483 \| good	0.365 \| good
2026-08-18T06:00:00.000Z	33 \| good	5.733 \| good	23.012 \| good	25.992 \| good	1.294 \| good	2.745 \| good	0.365 \| good
2026-08-18T07:00:00.000Z	49 \| good	8.695 \| good	32.87 \| good	19.986 \| good	1.23 \| good	2.743 \| good	0.35 \| good
2026-08-18T08:00:00.000Z	44 \| good	7.531 \| good	29.205 \| good	13.508 \| good	1.258 \| good	3.459 \| good	0.341 \| good
2026-08-18T09:00:00.000Z	38 \| good	6.975 \| good	32.402 \| good	12.845 \| good	1.198 \| good	4.164 \| good	0.35 \| good
2026-08-18T10:00:00.000Z	38 \| good	6.526 \| good	35.326 \| good	12.053 \| good	1.173 \| good	4.202 \| good	0.395 \| good
2026-08-18T11:00:00.000Z	38 \| good	6.821 \| good	33.615 \| good	9.984 \| good	1.342 \| good	5.641 \| good	0.455 \| good
2026-08-18T12:00:00.000Z	49 \| good	9.305 \| good	38.181 \| good	10.929 \| good	0.871 \| good	9.768 \| good	0.503 \| good
2026-08-18T13:00:00.000Z	44 \| good	8.042 \| good	35.715 \| good	9.948 \| good	0.871 \| good	10.327 \| good	0.517 \| good
2026-08-18T14:00:00.000Z	49 \| good	8.949 \| good	31.661 \| good	5.926 \| good	0.89 \| good	11.718 \| good	0.517 \| good
2026-08-18T15:00:00.000Z	38 \| good	7.087 \| good	31.264 \| good	9.913 \| good	0.849 \| good	7.869 \| good	0.463 \| good
2026-08-18T16:00:00.000Z	54 \| moderate	10.504 \| good	38.529 \| good	17.708 \| good	0.653 \| good	3.777 \| good	0.352 \| good
2026-08-18T17:00:00.000Z	49 \| good	9.383 \| good	40.873 \| good	18.111 \| good	0.67 \| good	3.483 \| good	0.329 \| good
2026-08-18T18:00:00.000Z	49 \| good	9.383 \| good	40.873 \| good	18.111 \| good	0.67 \| good	3.483 \| good	0.329 \| good
2026-08-18T19:00:00.000Z	49 \| good	9.466 \| good	42.136 \| good	29.772 \| good	0.247 \| good	0.415 \| good	0.091 \| good
2026-08-18T20:00:00.000Z	49 \| good	8.578 \| good	37.179 \| good	30.15 \| good	0.216 \| good	0.391 \| good	0.095 \| good
2026-08-18T21:00:00.000Z	52 \| moderate	10.284 \| good	45.656 \| good	32.242 \| good	0.199 \| good	0.399 \| good	0.099 \| good
2026-08-18T22:00:00.000Z	52 \| moderate	10.264 \| good	45.56 \| good	35.308 \| good	0.193 \| good	0.444 \| good	0.102 \| good
2026-08-18T23:00:00.000Z	49 \| good	9.35 \| good	41.665 \| good	36.186 \| good	0.192 \| good	0.533 \| good	0.103 \| good
2026-08-19T00:00:00.000Z	54 \| moderate	11.485 \| good	50.641 \| good	36.288 \| good	0.196 \| good	0.707 \| good	0.105 \| good
2026-08-19T01:00:00.000Z	56 \| moderate	11.805 \| good	52.932 \| good	29.526 \| good	0.21 \| good	1.923 \| good	0.113 \| good
2026-08-19T02:00:00.000Z	56 \| moderate	12.439 \| fine	56.358 \| fine	25.453 \| good	0.232 \| good	3.381 \| good	0.121 \| good
2026-08-19T03:00:00.000Z	77 \| moderate	22.852 \| fine	100.219 \| fine	19.827 \| good	0.251 \| good	3.348 \| good	0.121 \| good
2026-08-19T04:00:00.000Z	69 \| moderate	18.743 \| fine	82.95 \| fine	14.739 \| good	0.264 \| good	2.359 \| good	0.115 \| good
2026-08-19T05:00:00.000Z	69 \| moderate	18.716 \| fine	82.904 \| fine	12.276 \| good	0.285 \| good	1.922 \| good	0.109 \| good
2026-08-19T06:00:00.000Z	66 \| moderate	17.021 \| fine	75.203 \| fine	10.273 \| good	0.319 \| good	1.872 \| good	0.105 \| good
2026-08-19T07:00:00.000Z	69 \| moderate	19.232 \| fine	84.95 \| fine	8.191 \| good	0.356 \| good	1.997 \| good	0.102 \| good
2026-08-19T08:00:00.000Z	64 \| moderate	16.322 \| fine	72.709 \| fine	8.127 \| good	0.391 \| good	2.16 \| good	0.098 \| good
2026-08-19T09:00:00.000Z	60 \| moderate	13.749 \| fine	61.592 \| fine	8.651 \| good	0.42 \| good	2.311 \| good	0.096 \| good
2026-08-19T10:00:00.000Z	56 \| moderate	11.537 \| good	51.272 \| good	8.918 \| good	0.438 \| good	2.448 \| good	0.093 \| good
2026-08-19T11:00:00.000Z	54 \| moderate	11.133 \| good	49.329 \| good	6.117 \| good	0.445 \| good	2.618 \| good	0.092 \| good
2026-08-19T12:00:00.000Z	49 \| good	8.776 \| good	38.926 \| good	6.698 \| good	0.447 \| good	2.855 \| good	0.092 \| good
2026-08-19T13:00:00.000Z	56 \| moderate	12.194 \| fine	54.95 \| good	11.186 \| good	0.44 \| good	2.816 \| good	0.095 \| good
2026-08-19T14:00:00.000Z	52 \| moderate	10.133 \| good	44.759 \| good	16.303 \| good	0.475 \| good	1.745 \| good	0.092 \| good
2026-08-19T15:00:00.000Z	56 \| moderate	11.632 \| good	51.447 \| good	21.05 \| good	0.484 \| good	1.143 \| good	0.093 \| good
2026-08-19T16:00:00.000Z	58 \| moderate	12.884 \| fine	57.81 \| fine	30.223 \| good	0.492 \| good	0.828 \| good	0.094 \| good
2026-08-19T17:00:00.000Z	60 \| moderate	14.021 \| fine	63.397 \| fine	35.409 \| good	0.46 \| good	0.631 \| good	0.096 \| good
2026-08-19T18:00:00.000Z	60 \| moderate	14.017 \| fine	63.413 \| fine	35.501 \| good	0.399 \| good	0.496 \| good	0.1 \| good
2026-08-19T19:00:00.000Z	62 \| moderate	14.83 \| fine	66.688 \| fine	34.156 \| good	0.344 \| good	0.432 \| good	0.102 \| good
2026-08-19T20:00:00.000Z	56 \| moderate	12.17 \| fine	54.551 \| good	32.891 \| good	0.309 \| good	0.421 \| good	0.103 \| good
2026-08-19T21:00:00.000Z	58 \| moderate	13.211 \| fine	59.223 \| fine	33.909 \| good	0.282 \| good	0.421 \| good	0.103 \| good
2026-08-19T22:00:00.000Z	56 \| moderate	12.369 \| fine	56.219 \| fine	36.966 \| good	0.261 \| good	0.453 \| good	0.101 \| good
2026-08-19T23:00:00.000Z	58 \| moderate	13.042 \| fine	58.935 \| fine	37.824 \| good	0.248 \| good	0.532 \| good	0.1 \| good
2026-08-20T00:00:00.000Z	62 \| moderate	14.508 \| fine	64.452 \| fine	37.824 \| good	0.242 \| good	0.72 \| good	0.099 \| good
2026-08-20T01:00:00.000Z	54 \| moderate	10.925 \| good	48.072 \| good	31.393 \| good	0.252 \| good	2.04 \| good	0.107 \| good
2026-08-20T02:00:00.000Z	44 \| good	8.294 \| good	36.503 \| good	25.653 \| good	0.261 \| good	3.157 \| good	0.112 \| good
2026-08-20T03:00:00.000Z	67 \| moderate	18.156 \| fine	80.284 \| fine	20.056 \| good	0.259 \| good	2.237 \| good	0.104 \| good
2026-08-20T04:00:00.000Z	62 \| moderate	14.597 \| fine	65 \| fine	17.133 \| good	0.253 \| good	1.589 \| good	0.098 \| good
2026-08-20T05:00:00.000Z	62 \| moderate	15.419 \| fine	68.935 \| fine	14.965 \| good	0.269 \| good	1.538 \| good	0.094 \| good
2026-08-20T06:00:00.000Z	60 \| moderate	14.286 \| fine	64.175 \| fine	12.895 \| good	0.293 \| good	1.702 \| good	0.092 \| good
2026-08-20T07:00:00.000Z	64 \| moderate	16.085 \| fine	71.223 \| fine	11.066 \| good	0.323 \| good	1.841 \| good	0.09 \| good
2026-08-20T08:00:00.000Z	62 \| moderate	14.813 \| fine	66.175 \| fine	10.645 \| good	0.353 \| good	1.987 \| good	0.089 \| good
2026-08-20T09:00:00.000Z	62 \| moderate	14.635 \| fine	65 \| fine	12.588 \| good	0.383 \| good	2.136 \| good	0.088 \| good
2026-08-20T10:00:00.000Z	58 \| moderate	13.135 \| fine	59 \| fine	13.431 \| good	0.406 \| good	2.279 \| good	0.087 \| good
2026-08-20T11:00:00.000Z	62 \| moderate	14.627 \| fine	65 \| fine	6.362 \| good	0.422 \| good	2.436 \| good	0.087 \| good
2026-08-20T12:00:00.000Z	60 \| moderate	13.591 \| fine	61 \| fine	9.399 \| good	0.433 \| good	2.638 \| good	0.088 \| good
2026-08-20T13:00:00.000Z	62 \| moderate	14.923 \| fine	66.885 \| fine	12.911 \| good	0.438 \| good	2.492 \| good	0.09 \| good
2026-08-20T14:00:00.000Z	54 \| moderate	10.93 \| good	48.313 \| good	16.208 \| good	0.459 \| good	1.654 \| good	0.09 \| good
2026-08-20T15:00:00.000Z	52 \| moderate	10.13 \| good	44.837 \| good	19.536 \| good	0.472 \| good	1.113 \| good	0.093 \| good
2026-08-20T16:00:00.000Z	54 \| moderate	11.376 \| good	50.323 \| good	26.446 \| good	0.484 \| good	0.796 \| good	0.097 \| good
2026-08-20T17:00:00.000Z	56 \| moderate	11.532 \| good	50.979 \| good	30.809 \| good	0.43 \| good	0.618 \| good	0.099 \| good
2026-08-20T18:00:00.000Z	54 \| moderate	11.235 \| good	49.422 \| good	33.694 \| good	0.348 \| good	0.494 \| good	0.1 \| good

San Marcos

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

0.33ppm

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 2026-08-18.

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 04:00:00 on 2026-08-18.

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

As of now, the AQI in San Marcos, Texas is 49, indicating Good conditions.

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

San Marcos, Texas air has the highest levels of PM2.5.

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 9.383 μg/m³.

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

The PM₁₀ concentration in San Marcos, Texas is 40.873 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 0.329 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 0.67 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 18.111 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 3.483 ppb.

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