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

The PM10 concentration in San Marcos, Texas is 27.064 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 0.929 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 15.22 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 3.824 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 5.603 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)

5.60 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

27.06 μg/m³

155

255

425

605+

Ozone (O₃)

15.22 ppb

201

201+

Sulfur Dioxide (SO₂)

0.93 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.82 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.39 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
2026-09-05T17:00:00.000Z	44 \| good	7.526 \| good	21.076 \| good	17.833 \| good	0.826 \| good	3.729 \| good	0.332 \| good
2026-09-05T18:00:00.000Z	38 \| good	6.65 \| good	31.975 \| good	20.552 \| good	0.807 \| good	3.652 \| good	0.352 \| good
2026-09-05T19:00:00.000Z	23 \| good	3.949 \| good	16.484 \| good	24.72 \| good	0.787 \| good	3.57 \| good	0.374 \| good
2026-09-05T20:00:00.000Z	38 \| good	6.896 \| good	25.842 \| good	26.63 \| good	0.768 \| good	3.361 \| good	0.401 \| good
2026-09-05T21:00:00.000Z	44 \| good	7.844 \| good	28.453 \| good	29.245 \| good	0.768 \| good	3.725 \| good	0.378 \| good
2026-09-05T22:00:00.000Z	33 \| good	6.31 \| good	14.863 \| good	31.605 \| good	0.768 \| good	3.648 \| good	0.355 \| good
2026-09-05T23:00:00.000Z	49 \| good	9.337 \| good	25.368 \| good	32.337 \| good	0.768 \| good	3.727 \| good	0.417 \| good
2026-09-06T00:00:00.000Z	44 \| good	7.559 \| good	19.837 \| good	37.207 \| good	0.768 \| good	3.232 \| good	0.417 \| good
2026-09-06T01:00:00.000Z	35 \| good	6.176 \| good	31.007 \| good	38.333 \| good	0.732 \| good	4.241 \| good	0.455 \| good
2026-09-06T02:00:00.000Z	33 \| good	5.871 \| good	22.042 \| good	29.249 \| good	0.73 \| good	6.926 \| good	0.514 \| good
2026-09-06T03:00:00.000Z	19 \| good	0.555 \| good	2.222 \| good	21.303 \| good	0.211 \| good	2.025 \| good	0.098 \| good
2026-09-06T04:00:00.000Z	24 \| good	4.057 \| good	18.274 \| good	25.558 \| good	0.768 \| good	8.789 \| good	0.668 \| good
2026-09-06T05:00:00.000Z	18 \| good	2.619 \| good	18.513 \| good	18.757 \| good	0.768 \| good	5.652 \| good	0.526 \| good
2026-09-06T06:00:00.000Z	19 \| good	2.093 \| good	20.099 \| good	21.333 \| good	0.749 \| good	5.742 \| good	0.484 \| good
2026-09-06T07:00:00.000Z	22 \| good	3.506 \| good	21.976 \| good	18.704 \| good	0.749 \| good	5.495 \| good	0.48 \| good
2026-09-06T08:00:00.000Z	27 \| good	5.34 \| good	25.533 \| good	17.195 \| good	0.865 \| good	5.018 \| good	0.403 \| good
2026-09-06T09:00:00.000Z	33 \| good	5.918 \| good	19.255 \| good	16.25 \| good	0.749 \| good	4.867 \| good	0.406 \| good
2026-09-06T10:00:00.000Z	33 \| good	5.591 \| good	18.366 \| good	13.8 \| good	0.749 \| good	7.55 \| good	0.409 \| good
2026-09-06T11:00:00.000Z	19 \| good	2.974 \| good	21.225 \| good	5.758 \| good	0.749 \| good	5.671 \| good	0.371 \| good
2026-09-06T12:00:00.000Z	34 \| good	5.327 \| good	37.49 \| good	9.88 \| good	0.749 \| good	6.393 \| good	0.371 \| good
2026-09-06T13:00:00.000Z	33 \| good	5.517 \| good	17.712 \| good	11.77 \| good	0.749 \| good	7.563 \| good	0.39 \| good
2026-09-06T14:00:00.000Z	33 \| good	5.586 \| good	30.551 \| good	11.426 \| good	0.769 \| good	5.43 \| good	0.39 \| good
2026-09-06T15:00:00.000Z	26 \| good	4.441 \| good	28.487 \| good	14.636 \| good	0.885 \| good	4.837 \| good	0.371 \| good
2026-09-06T16:00:00.000Z	38 \| good	7.436 \| good	19.669 \| good	19.495 \| good	0.883 \| good	3.866 \| good	0.351 \| good
2026-09-06T17:00:00.000Z	44 \| good	7.726 \| good	24.78 \| good	24.172 \| good	0.883 \| good	2.712 \| good	0.313 \| good
2026-09-06T18:00:00.000Z	33 \| good	6.147 \| good	19.206 \| good	24.249 \| good	0.826 \| good	3.015 \| good	0.336 \| good
2026-09-06T19:00:00.000Z	38 \| good	7.136 \| good	22.928 \| good	28.222 \| good	0.806 \| good	2.743 \| good	0.355 \| good
2026-09-06T20:00:00.000Z	38 \| good	6.996 \| good	35.194 \| good	32.45 \| good	0.634 \| good	2.791 \| good	0.378 \| good
2026-09-06T21:00:00.000Z	44 \| good	7.87 \| good	16.544 \| good	40.244 \| good	0.806 \| good	3.392 \| good	0.401 \| good
2026-09-06T22:00:00.000Z	35 \| good	5.893 \| good	19.029 \| good	37.75 \| good	0.777 \| good	3.14 \| good	0.375 \| good
2026-09-06T23:00:00.000Z	44 \| good	7.719 \| good	34.437 \| good	35.521 \| good	0.832 \| good	2.282 \| good	0.368 \| good
2026-09-07T00:00:00.000Z	30 \| good	4.946 \| good	15.985 \| good	32.387 \| good	0.889 \| good	3.614 \| good	0.436 \| good
2026-09-07T01:00:00.000Z	35 \| good	5.872 \| good	28.115 \| good	38.114 \| good	0.889 \| good	4.847 \| good	0.455 \| good
2026-09-07T02:00:00.000Z	33 \| good	6.048 \| good	19.948 \| good	29.722 \| good	0.872 \| good	8.709 \| good	0.443 \| good
2026-09-07T03:00:00.000Z	25 \| good	0.665 \| good	2.652 \| good	26.533 \| good	0.247 \| good	3.056 \| good	0.13 \| good
2026-09-07T04:00:00.000Z	26 \| good	3.201 \| good	17.378 \| good	27.986 \| good	0.872 \| good	9.422 \| good	0.501 \| good
2026-09-07T05:00:00.000Z	19 \| good	2.776 \| good	13.158 \| good	20.934 \| good	0.889 \| good	8.136 \| good	0.429 \| good
2026-09-07T06:00:00.000Z	27 \| good	4.961 \| good	24.473 \| good	16.456 \| good	0.858 \| good	6.151 \| good	0.406 \| good
2026-09-07T07:00:00.000Z	33 \| good	5.876 \| good	24.193 \| good	22.234 \| good	0.858 \| good	6.353 \| good	0.406 \| good
2026-09-07T08:00:00.000Z	33 \| good	6.418 \| good	31.616 \| good	16.242 \| good	0.872 \| good	6.709 \| good	0.367 \| good
2026-09-07T09:00:00.000Z	33 \| good	6.045 \| good	26.066 \| good	15.68 \| good	0.872 \| good	6.703 \| good	0.387 \| good
2026-09-07T10:00:00.000Z	33 \| good	6.491 \| good	27.787 \| good	14.213 \| good	0.922 \| good	6.162 \| good	0.387 \| good
2026-09-07T11:00:00.000Z	29 \| good	4.924 \| good	30.787 \| good	11.964 \| good	0.922 \| good	5.121 \| good	0.387 \| good
2026-09-07T12:00:00.000Z	30 \| good	3.74 \| good	31.523 \| good	12.592 \| good	0.906 \| good	5.85 \| good	0.387 \| good
2026-09-07T13:00:00.000Z	22 \| good	4.481 \| good	17.87 \| good	10.827 \| good	0.906 \| good	6.768 \| good	0.387 \| good
2026-09-07T14:00:00.000Z	27 \| good	5.472 \| good	21.021 \| good	9.577 \| good	0.876 \| good	5.889 \| good	0.406 \| good
2026-09-07T15:00:00.000Z	22 \| good	4.17 \| good	20.321 \| good	12.207 \| good	0.893 \| good	4.288 \| good	0.345 \| good
2026-09-07T16:00:00.000Z	33 \| good	5.603 \| good	27.064 \| good	15.22 \| good	0.929 \| good	3.824 \| good	0.387 \| good
2026-09-07T16:00:00.000Z	33 \| good	5.603 \| good	27.064 \| good	15.22 \| good	0.929 \| good	3.824 \| good	0.387 \| good
2026-09-07T17:00:00.000Z	38 \| good	7.106 \| good	31.387 \| good	32.733 \| good	0.363 \| good	0.533 \| good	0.128 \| good
2026-09-07T18:00:00.000Z	27 \| good	4.322 \| good	18.844 \| good	29.483 \| good	0.298 \| good	0.424 \| good	0.126 \| good
2026-09-07T19:00:00.000Z	30 \| good	4.07 \| good	17.773 \| good	31.902 \| good	0.263 \| good	0.392 \| good	0.126 \| good
2026-09-07T20:00:00.000Z	33 \| good	5.996 \| good	26.782 \| good	33.964 \| good	0.238 \| good	0.378 \| good	0.126 \| good
2026-09-07T21:00:00.000Z	33 \| good	5.601 \| good	24.253 \| good	35.811 \| good	0.218 \| good	0.385 \| good	0.126 \| good
2026-09-07T22:00:00.000Z	34 \| good	1.673 \| good	6.808 \| good	36.792 \| good	0.203 \| good	0.418 \| good	0.125 \| good
2026-09-07T23:00:00.000Z	32 \| good	5.107 \| good	22.181 \| good	35.148 \| good	0.191 \| good	0.507 \| good	0.126 \| good
2026-09-08T00:00:00.000Z	27 \| good	1.982 \| good	8.033 \| good	28.683 \| good	0.182 \| good	0.779 \| good	0.126 \| good
2026-09-08T01:00:00.000Z	24 \| good	2.654 \| good	10.903 \| good	25.993 \| good	0.189 \| good	2.352 \| good	0.136 \| good
2026-09-08T02:00:00.000Z	21 \| good	1.639 \| good	6.726 \| good	22.81 \| good	0.202 \| good	2.869 \| good	0.138 \| good
2026-09-08T03:00:00.000Z	18 \| good	0.66 \| good	2.371 \| good	18.711 \| good	0.209 \| good	2.561 \| good	0.135 \| good
2026-09-08T04:00:00.000Z	14 \| good	0.966 \| good	3.774 \| good	15.485 \| good	0.201 \| good	2.028 \| good	0.13 \| good
2026-09-08T05:00:00.000Z	16 \| good	3.478 \| good	15.039 \| good	12.775 \| good	0.191 \| good	1.68 \| good	0.124 \| good
2026-09-08T06:00:00.000Z	11 \| good	2.08 \| good	8.475 \| good	11.632 \| good	0.208 \| good	1.637 \| good	0.118 \| good
2026-09-08T07:00:00.000Z	22 \| good	4.171 \| good	18.368 \| good	10.945 \| good	0.247 \| good	1.778 \| good	0.114 \| good
2026-09-08T08:00:00.000Z	38 \| good	7.046 \| good	31.205 \| good	11.543 \| good	0.292 \| good	2.016 \| good	0.112 \| good
2026-09-08T09:00:00.000Z	22 \| good	4.372 \| good	19.034 \| good	10.39 \| good	0.334 \| good	2.321 \| good	0.11 \| good
2026-09-08T10:00:00.000Z	22 \| good	3.685 \| good	16.315 \| good	9.556 \| good	0.368 \| good	2.703 \| good	0.11 \| good
2026-09-08T11:00:00.000Z	11 \| good	1.669 \| good	6.726 \| good	4.154 \| good	0.397 \| good	3.198 \| good	0.111 \| good
2026-09-08T12:00:00.000Z	16 \| good	2.983 \| good	12.651 \| good	7.257 \| good	0.425 \| good	3.91 \| good	0.113 \| good
2026-09-08T13:00:00.000Z	33 \| good	5.502 \| good	23.499 \| good	12.943 \| good	0.444 \| good	4.099 \| good	0.118 \| good
2026-09-08T14:00:00.000Z	49 \| good	8.601 \| good	37.525 \| good	19.92 \| good	0.553 \| good	2.081 \| good	0.108 \| good
2026-09-08T15:00:00.000Z	44 \| good	7.934 \| good	34.781 \| good	25.888 \| good	0.493 \| good	1.191 \| good	0.105 \| good
2026-09-08T16:00:00.000Z	28 \| good	4.864 \| good	21.284 \| good	29.525 \| good	0.395 \| good	0.747 \| good	0.106 \| good
2026-09-08T17:00:00.000Z	33 \| good	6.219 \| good	27.503 \| good	33.936 \| good	0.325 \| good	0.523 \| good	0.108 \| good
2026-09-08T18:00:00.000Z	30 \| good	2.532 \| good	10.705 \| good	31.635 \| good	0.307 \| good	0.435 \| good	0.11 \| good
2026-09-08T19:00:00.000Z	32 \| good	2.374 \| good	9.751 \| good	35.271 \| good	0.288 \| good	0.4 \| good	0.111 \| good
2026-09-08T20:00:00.000Z	35 \| good	3.703 \| good	16.371 \| good	38.098 \| good	0.266 \| good	0.39 \| good	0.112 \| good
2026-09-08T21:00:00.000Z	34 \| good	5.072 \| good	21.934 \| good	36.719 \| good	0.243 \| good	0.395 \| good	0.112 \| good
2026-09-08T22:00:00.000Z	35 \| good	1.142 \| good	4.764 \| good	38.256 \| good	0.222 \| good	0.426 \| good	0.111 \| good
2026-09-08T23:00:00.000Z	37 \| good	4.457 \| good	19.535 \| good	39.606 \| good	0.211 \| good	0.517 \| good	0.111 \| good
2026-09-09T00:00:00.000Z	32 \| good	3.263 \| good	14.047 \| good	35.221 \| good	0.203 \| good	0.72 \| good	0.111 \| good
2026-09-09T01:00:00.000Z	25 \| good	2.49 \| good	10.045 \| good	27.303 \| good	0.204 \| good	1.43 \| good	0.113 \| good
2026-09-09T02:00:00.000Z	23 \| good	3.421 \| good	15.175 \| good	25.409 \| good	0.177 \| good	1.293 \| good	0.11 \| good
2026-09-09T03:00:00.000Z	20 \| good	1.882 \| good	7.936 \| good	22.329 \| good	0.158 \| good	1.297 \| good	0.106 \| good
2026-09-09T04:00:00.000Z	19 \| good	0.768 \| good	2.819 \| good	19.683 \| good	0.15 \| good	1.409 \| good	0.104 \| good
2026-09-09T05:00:00.000Z	22 \| good	4.233 \| good	18.555 \| good	15.805 \| good	0.155 \| good	1.582 \| good	0.103 \| good
2026-09-09T06:00:00.000Z	16 \| good	2.862 \| good	11.961 \| good	14.093 \| good	0.168 \| good	1.648 \| good	0.102 \| good
2026-09-09T07:00:00.000Z	27 \| good	4.61 \| good	20 \| good	12.773 \| good	0.187 \| good	1.664 \| good	0.101 \| good
2026-09-09T08:00:00.000Z	33 \| good	6.471 \| good	29.048 \| good	14.337 \| good	0.212 \| good	1.75 \| good	0.1 \| good
2026-09-09T09:00:00.000Z	22 \| good	3.975 \| good	17.117 \| good	13.226 \| good	0.24 \| good	2.026 \| good	0.1 \| good
2026-09-09T10:00:00.000Z	22 \| good	3.943 \| good	17.387 \| good	11.589 \| good	0.267 \| good	2.579 \| good	0.101 \| good
2026-09-09T11:00:00.000Z	6 \| good	1.434 \| good	5.751 \| good	6.41 \| good	0.3 \| good	3.398 \| good	0.104 \| good
2026-09-09T12:00:00.000Z	16 \| good	2.506 \| good	10.314 \| good	7.142 \| good	0.324 \| good	4.49 \| good	0.108 \| good
2026-09-09T13:00:00.000Z	38 \| good	7.43 \| good	32.659 \| good	13.485 \| good	0.35 \| good	4.655 \| good	0.115 \| good
2026-09-09T14:00:00.000Z	22 \| good	4.335 \| good	19.087 \| good	18.36 \| good	0.499 \| good	1.993 \| good	0.102 \| good
2026-09-09T15:00:00.000Z	24 \| good	3.067 \| good	12.997 \| good	25.793 \| good	0.487 \| good	1.216 \| good	0.101 \| good
2026-09-09T16:00:00.000Z	27 \| good	1.337 \| good	5.243 \| good	29.449 \| good	0.409 \| good	0.769 \| good	0.101 \| good

San Marcos

Get reliable air quality data to drive your business

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

0.34ppm

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 2026-09-06.

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 05:00:00 on 2026-09-07.

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

As of now, the AQI in San Marcos, Texas is 33, 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 5.603 μg/m³.

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

The PM₁₀ concentration in San Marcos, Texas is 27.064 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 0.387 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 0.929 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 15.22 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 3.824 ppb.

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