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

The PM10 concentration in San Marcos, Texas is 36.932 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 0.976 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 20.89 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 3.079 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 8.491 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)

8.49 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

36.93 μg/m³

155

255

425

605+

Ozone (O₃)

20.89 ppb

201

201+

Sulfur Dioxide (SO₂)

0.98 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.08 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.38 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
2026-04-22T08:00:00.000Z	52 \| moderate	10.011 \| good	44.598 \| good	29.954 \| good	0.961 \| good	3.742 \| good	0.165 \| good
2026-04-22T09:00:00.000Z	38 \| good	7.188 \| good	31.921 \| good	29.907 \| good	0.887 \| good	3.097 \| good	0.165 \| good
2026-04-22T10:00:00.000Z	38 \| good	7.259 \| good	32.073 \| good	23.996 \| good	0.867 \| good	3.466 \| good	0.2 \| good
2026-04-22T11:00:00.000Z	38 \| good	7.335 \| good	32.785 \| good	22.974 \| good	0.879 \| good	3.442 \| good	0.218 \| good
2026-04-22T12:00:00.000Z	44 \| good	8.011 \| good	35.528 \| good	23.927 \| good	0.923 \| good	4.855 \| good	0.258 \| good
2026-04-22T13:00:00.000Z	38 \| good	7.025 \| good	30.897 \| good	22.912 \| good	0.853 \| good	6.104 \| good	0.258 \| good
2026-04-22T14:00:00.000Z	49 \| good	8.863 \| good	38.66 \| good	22.883 \| good	0.966 \| good	8.108 \| good	0.352 \| good
2026-04-22T15:00:00.000Z	49 \| good	8.604 \| good	37.889 \| good	21.875 \| good	0.965 \| good	7.587 \| good	0.372 \| good
2026-04-22T16:00:00.000Z	38 \| good	7.128 \| good	31.877 \| good	22.849 \| good	0.869 \| good	4.133 \| good	0.253 \| good
2026-04-22T17:00:00.000Z	38 \| good	7.07 \| good	31.113 \| good	24.821 \| good	0.852 \| good	3.401 \| good	0.201 \| good
2026-04-22T18:00:00.000Z	33 \| good	6.343 \| good	28.148 \| good	26.841 \| good	0.875 \| good	2.706 \| good	0.201 \| good
2026-04-22T19:00:00.000Z	44 \| good	7.963 \| good	35.179 \| good	28.881 \| good	2.487 \| good	5.296 \| good	0.333 \| good
2026-04-22T20:00:00.000Z	38 \| good	7.428 \| good	33.263 \| good	33.819 \| good	0.849 \| good	5.82 \| good	0.356 \| good
2026-04-22T21:00:00.000Z	38 \| good	7.412 \| good	33.227 \| good	34.814 \| good	1.147 \| good	7.943 \| good	0.378 \| good
2026-04-22T22:00:00.000Z	31 \| good	5.355 \| good	23.13 \| good	33.845 \| good	1.165 \| good	6.18 \| good	0.378 \| good
2026-04-22T23:00:00.000Z	44 \| good	8.196 \| good	35.909 \| good	31.932 \| good	1.006 \| good	7.816 \| good	0.378 \| good
2026-04-23T00:00:00.000Z	44 \| good	7.526 \| good	33.055 \| good	31.96 \| good	1.002 \| good	2.44 \| good	0.286 \| good
2026-04-23T01:00:00.000Z	49 \| good	8.877 \| good	38.825 \| good	32.935 \| good	0.896 \| good	2.808 \| good	0.286 \| good
2026-04-23T02:00:00.000Z	49 \| good	8.924 \| good	40.533 \| good	34.86 \| good	1.024 \| good	2.701 \| good	0.282 \| good
2026-04-23T03:00:00.000Z	32 \| good	5.106 \| good	22.016 \| good	34.836 \| good	0.988 \| good	2.62 \| good	0.286 \| good
2026-04-23T04:00:00.000Z	30 \| good	4.413 \| good	19.07 \| good	31.857 \| good	1.025 \| good	1.991 \| good	0.288 \| good
2026-04-23T05:00:00.000Z	26 \| good	3.804 \| good	16.962 \| good	27.873 \| good	1.025 \| good	2.032 \| good	0.271 \| good
2026-04-23T06:00:00.000Z	20 \| good	3.23 \| good	14.202 \| good	21.968 \| good	1.025 \| good	1.996 \| good	0.246 \| good
2026-04-23T07:00:00.000Z	33 \| good	5.974 \| good	26.914 \| good	20.975 \| good	1.069 \| good	1.892 \| good	0.25 \| good
2026-04-23T08:00:00.000Z	38 \| good	6.969 \| good	30.895 \| good	22.861 \| good	1.151 \| good	1.825 \| good	0.271 \| good
2026-04-23T09:00:00.000Z	44 \| good	7.792 \| good	33.976 \| good	21.854 \| good	1.144 \| good	1.434 \| good	0.246 \| good
2026-04-23T10:00:00.000Z	38 \| good	7.001 \| good	30.935 \| good	19.902 \| good	1.126 \| good	1.691 \| good	0.246 \| good
2026-04-23T11:00:00.000Z	44 \| good	7.715 \| good	33.955 \| good	20.858 \| good	1.025 \| good	2.3 \| good	0.24 \| good
2026-04-23T12:00:00.000Z	33 \| good	6.454 \| good	29.073 \| good	19.866 \| good	1.007 \| good	3.496 \| good	0.286 \| good
2026-04-23T13:00:00.000Z	38 \| good	6.728 \| good	30.162 \| good	19.845 \| good	1.045 \| good	3.283 \| good	0.303 \| good
2026-04-23T14:00:00.000Z	49 \| good	8.771 \| good	38.896 \| good	20.836 \| good	1.13 \| good	3.406 \| good	0.271 \| good
2026-04-23T15:00:00.000Z	38 \| good	6.923 \| good	31.048 \| good	19.923 \| good	1.007 \| good	3.166 \| good	0.286 \| good
2026-04-23T16:00:00.000Z	44 \| good	7.896 \| good	34.918 \| good	20.958 \| good	1.063 \| good	3.544 \| good	0.271 \| good
2026-04-23T17:00:00.000Z	33 \| good	6.446 \| good	29.063 \| good	24.933 \| good	1.1 \| good	3.741 \| good	0.286 \| good
2026-04-23T18:00:00.000Z	38 \| good	6.91 \| good	31.014 \| good	25.966 \| good	1.081 \| good	4.419 \| good	0.25 \| good
2026-04-23T19:00:00.000Z	33 \| good	6.042 \| good	27.229 \| good	27.955 \| good	1.202 \| good	3.363 \| good	0.264 \| good
2026-04-23T20:00:00.000Z	33 \| good	6.134 \| good	27.074 \| good	30.923 \| good	1.201 \| good	5.854 \| good	0.496 \| good
2026-04-23T21:00:00.000Z	49 \| good	8.582 \| good	37.975 \| good	29.952 \| good	1.027 \| good	5.959 \| good	0.456 \| good
2026-04-23T22:00:00.000Z	49 \| good	8.677 \| good	37.931 \| good	29.962 \| good	1.165 \| good	6.19 \| good	0.466 \| good
2026-04-23T23:00:00.000Z	49 \| good	9.48 \| good	42.798 \| good	31.915 \| good	1.265 \| good	6.078 \| good	0.457 \| good
2026-04-24T00:00:00.000Z	49 \| good	8.518 \| good	36.977 \| good	31.905 \| good	0.762 \| good	7.039 \| good	0.47 \| good
2026-04-24T01:00:00.000Z	49 \| good	9.19 \| good	40.959 \| good	29.908 \| good	0.944 \| good	7.176 \| good	0.47 \| good
2026-04-24T02:00:00.000Z	44 \| good	7.908 \| good	35.001 \| good	24.977 \| good	0.744 \| good	7.647 \| good	0.447 \| good
2026-04-24T03:00:00.000Z	33 \| good	6.067 \| good	27 \| good	21.219 \| good	0.204 \| good	2.013 \| good	0.126 \| good
2026-04-24T04:00:00.000Z	38 \| good	7.121 \| good	31.964 \| good	21.932 \| good	1.02 \| good	3.915 \| good	0.428 \| good
2026-04-24T05:00:00.000Z	44 \| good	7.502 \| good	32.982 \| good	22.869 \| good	1.042 \| good	3.703 \| good	0.405 \| good
2026-04-24T06:00:00.000Z	44 \| good	8.491 \| good	36.932 \| good	20.89 \| good	0.976 \| good	3.079 \| good	0.382 \| good
2026-04-24T07:00:00.000Z	44 \| good	8.491 \| good	36.932 \| good	20.89 \| good	0.976 \| good	3.079 \| good	0.382 \| good
2026-04-24T08:00:00.000Z	49 \| good	9.247 \| good	41.072 \| good	28.827 \| good	0.175 \| good	1.515 \| good	0.119 \| good
2026-04-24T09:00:00.000Z	49 \| good	9.074 \| good	40.728 \| good	28.635 \| good	0.161 \| good	1.46 \| good	0.119 \| good
2026-04-24T10:00:00.000Z	44 \| good	8.399 \| good	36.884 \| good	28.846 \| good	0.15 \| good	1.518 \| good	0.121 \| good
2026-04-24T11:00:00.000Z	44 \| good	7.706 \| good	34.007 \| good	31.896 \| good	0.14 \| good	1.576 \| good	0.123 \| good
2026-04-24T12:00:00.000Z	44 \| good	8.032 \| good	35.299 \| good	23.631 \| good	0.129 \| good	1.634 \| good	0.124 \| good
2026-04-24T13:00:00.000Z	62 \| moderate	15.049 \| fine	67.914 \| fine	22.082 \| good	0.128 \| good	1.737 \| good	0.127 \| good
2026-04-24T14:00:00.000Z	52 \| moderate	10.303 \| good	45.43 \| good	21.702 \| good	0.127 \| good	1.84 \| good	0.13 \| good
2026-04-24T15:00:00.000Z	52 \| moderate	10.472 \| good	46.407 \| good	21.861 \| good	0.126 \| good	1.943 \| good	0.134 \| good
2026-04-24T16:00:00.000Z	52 \| moderate	9.723 \| good	43.42 \| good	23.843 \| good	0.125 \| good	1.658 \| good	0.136 \| good
2026-04-24T17:00:00.000Z	52 \| moderate	10.031 \| good	44.454 \| good	32.307 \| good	0.124 \| good	1.373 \| good	0.138 \| good
2026-04-24T18:00:00.000Z	54 \| moderate	10.726 \| good	47.387 \| good	38.626 \| good	0.124 \| good	1.088 \| good	0.14 \| good
2026-04-24T19:00:00.000Z	56 \| moderate	12.397 \| fine	56.096 \| fine	44.872 \| good	0.125 \| good	0.981 \| good	0.142 \| good
2026-04-24T20:00:00.000Z	54 \| moderate	10.728 \| good	47.368 \| good	50.327 \| good	0.127 \| good	0.875 \| good	0.144 \| good
2026-04-24T21:00:00.000Z	52 \| moderate	10.244 \| good	45.43 \| good	52.037 \| good	0.128 \| good	0.768 \| good	0.146 \| good
2026-04-24T22:00:00.000Z	60 \| moderate	14.223 \| fine	63.235 \| fine	53.952 \| good	0.141 \| good	1.105 \| good	0.149 \| good
2026-04-24T23:00:00.000Z	54 \| moderate	10.792 \| good	47.897 \| good	53.462 \| good	0.153 \| good	1.441 \| good	0.152 \| good
2026-04-25T00:00:00.000Z	49 \| good	8.514 \| good	37.034 \| good	50.315 \| good	0.166 \| good	1.778 \| good	0.155 \| good
2026-04-25T01:00:00.000Z	42 \| good	5.176 \| good	22.204 \| good	44.731 \| good	0.198 \| good	2.384 \| good	0.16 \| good
2026-04-25T02:00:00.000Z	39 \| good	5.753 \| good	25.017 \| good	42.192 \| good	0.23 \| good	2.99 \| good	0.164 \| good
2026-04-25T03:00:00.000Z	39 \| good	4.464 \| good	19.455 \| good	42.432 \| good	0.261 \| good	3.597 \| good	0.169 \| good
2026-04-25T04:00:00.000Z	40 \| good	5.827 \| good	25.151 \| good	42.613 \| good	0.277 \| good	3.363 \| good	0.168 \| good
2026-04-25T05:00:00.000Z	49 \| good	8.667 \| good	37.867 \| good	35.545 \| good	0.292 \| good	3.129 \| good	0.167 \| good
2026-04-25T06:00:00.000Z	49 \| good	9.059 \| good	40.744 \| good	30.774 \| good	0.308 \| good	2.895 \| good	0.166 \| good
2026-04-25T07:00:00.000Z	52 \| moderate	10.081 \| good	44.862 \| good	25.277 \| good	0.229 \| good	2.715 \| good	0.163 \| good
2026-04-25T08:00:00.000Z	52 \| moderate	9.959 \| good	44.345 \| good	23.253 \| good	0.15 \| good	2.535 \| good	0.161 \| good
2026-04-25T09:00:00.000Z	49 \| good	8.518 \| good	37.344 \| good	22.916 \| good	0.071 \| good	2.355 \| good	0.158 \| good
2026-04-25T10:00:00.000Z	54 \| moderate	11.237 \| good	49.647 \| good	23.07 \| good	0.066 \| good	2.269 \| good	0.157 \| good
2026-04-25T11:00:00.000Z	60 \| moderate	13.731 \| fine	62.11 \| fine	25.815 \| good	0.062 \| good	2.183 \| good	0.155 \| good
2026-04-25T12:00:00.000Z	60 \| moderate	13.737 \| fine	62.07 \| fine	22.408 \| good	0.057 \| good	2.097 \| good	0.154 \| good
2026-04-25T13:00:00.000Z	67 \| moderate	17.628 \| fine	78.2 \| fine	22.281 \| good	0.081 \| good	2.25 \| good	0.155 \| good
2026-04-25T14:00:00.000Z	66 \| moderate	17.09 \| fine	76.155 \| fine	18.69 \| good	0.106 \| good	2.404 \| good	0.155 \| good
2026-04-25T15:00:00.000Z	67 \| moderate	17.726 \| fine	78.483 \| fine	19.71 \| good	0.13 \| good	2.558 \| good	0.156 \| good
2026-04-25T16:00:00.000Z	66 \| moderate	16.838 \| fine	74.911 \| fine	25.372 \| good	0.125 \| good	2.018 \| good	0.155 \| good
2026-04-25T17:00:00.000Z	67 \| moderate	17.724 \| fine	78.769 \| fine	36.232 \| good	0.121 \| good	1.478 \| good	0.154 \| good
2026-04-25T18:00:00.000Z	64 \| moderate	15.731 \| fine	69.786 \| fine	41.777 \| good	0.116 \| good	0.937 \| good	0.153 \| good
2026-04-25T19:00:00.000Z	64 \| moderate	15.558 \| fine	69.154 \| fine	45.579 \| good	0.107 \| good	0.835 \| good	0.151 \| good
2026-04-25T20:00:00.000Z	64 \| moderate	15.678 \| fine	70.154 \| fine	46.594 \| good	0.098 \| good	0.733 \| good	0.148 \| good
2026-04-25T21:00:00.000Z	62 \| moderate	15.104 \| fine	67.338 \| fine	47.66 \| good	0.089 \| good	0.63 \| good	0.146 \| good
2026-04-25T22:00:00.000Z	69 \| moderate	19.009 \| fine	84.121 \| fine	48.359 \| good	0.101 \| good	0.984 \| good	0.148 \| good
2026-04-25T23:00:00.000Z	64 \| moderate	15.77 \| fine	70.846 \| fine	48.002 \| good	0.113 \| good	1.338 \| good	0.15 \| good
2026-04-26T00:00:00.000Z	64 \| moderate	16.069 \| fine	71.233 \| fine	49.692 \| good	0.125 \| good	1.692 \| good	0.152 \| good
2026-04-26T01:00:00.000Z	58 \| moderate	13.42 \| fine	60.86 \| fine	41.592 \| good	0.175 \| good	2.672 \| good	0.162 \| good
2026-04-26T02:00:00.000Z	60 \| moderate	14.292 \| fine	63.786 \| fine	37.951 \| good	0.226 \| good	3.651 \| good	0.172 \| good
2026-04-26T03:00:00.000Z	54 \| moderate	11.104 \| good	49.27 \| good	31.917 \| good	0.276 \| good	4.63 \| good	0.182 \| good
2026-04-26T04:00:00.000Z	54 \| moderate	10.712 \| good	47.323 \| good	32.595 \| good	0.27 \| good	4.074 \| good	0.18 \| good
2026-04-26T05:00:00.000Z	54 \| moderate	11.325 \| good	50.178 \| good	27.709 \| good	0.265 \| good	3.519 \| good	0.179 \| good
2026-04-26T06:00:00.000Z	49 \| good	8.756 \| good	9.322 \| good	27.478 \| good	0.262 \| good	2.977 \| good	0.178 \| good
2026-04-26T07:00:00.000Z	58 \| moderate	13.369 \| fine	59.797 \| fine	27.81 \| good	0.186 \| good	2.567 \| good	0.174 \| good

San Marcos

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

0.38ppm

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 01:00:00 on 2026-04-24.

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 03:00:00 on 2026-04-24.

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

As of now, the AQI in San Marcos, Texas is 44, 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 8.491 μg/m³.

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

The PM₁₀ concentration in San Marcos, Texas is 36.932 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 0.382 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 0.976 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 20.89 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 3.079 ppb.

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