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Air quality in San Marcos
Air quality index (AQI) and PM2.5 air pollution in San Marcos
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San Marcos Air Quality Map
Real-time San Marcos air pollution map
AIR QUALITY DATA CONTRIBUTORS
Texas Commission on Environmental Quality (TCEQ)
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Pollen
What is the pollen count in San Marcos today?
 | Index | High | |
 | Tree pollen | High | |
 | Grass pollen | High | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in San Marcos?
| Weather | Broken clouds |
| Temperature | 80.6°F |
| Humidity | 73% |
| Wind | 17.3 mp/h |
| Pressure | 29.7 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Coachella, California | 102 |
| 2 | Chattanooga, Tennessee | 81 |
| 3 | Palm Desert, California | 81 |
| 4 | Boerne, Texas | 76 |
| 5 | Gatlinburg, Tennessee | 69 |
| 6 | Tonasket, Washington | 68 |
| 7 | Corpus Christi, Texas | 64 |
| 8 | San Antonio, Texas | 63 |
| 9 | Tampa, Florida | 63 |
| 10 | Georgetown, Texas | 62 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live San Marcos aqi ranking
Real-time San Marcos air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | CAPCOG San Marcos Staples Road | 55 |
(local time)
SEE WORLD AQI RANKING
US AQI
55
live AQI index
Moderate
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 55 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 13.9µg/m³ | |
| O3 | 62µg/m³ | |
!
PM2.5
x2.8
PM2.5 concentration in San Marcos is currently 2.8 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in San Marcos?
 | Sensitive groups should reduce outdoor exercise |
 | Close your windows to avoid dirty outdoor air GET A MONITOR |
 | Sensitive groups should wear a mask outdoors GET A MASK |
 | Sensitive groups should run an air purifier GET AN AIR PURIFIER |
Forecast
San Marcos air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Tuesday, Apr 23 | Good 29 AQI US  |  | 82.4° 64.4° |  13.4 mp/h |
| Wednesday, Apr 24 | Good 49 AQI US | | 80.6° 66.2° | 20.1 mp/h |
| Thursday, Apr 25 | Moderate 55 AQI US | | 80.6° 69.8° | 22.4 mp/h |
| Today | Moderate 55 AQI US | 80% | 80.6° 69.8° | 22.4 mp/h |
| Saturday, Apr 27 | Moderate 53 AQI US | | 86° 69.8° | 24.6 mp/h |
| Sunday, Apr 28 | Good 47 AQI US | 100% | 80.6° 68° | 22.4 mp/h |
| Monday, Apr 29 | Good 47 AQI US | 20% | 82.4° 69.8° | 11.2 mp/h |
| Tuesday, Apr 30 | Good 44 AQI US | 40% | 82.4° 71.6° | 13.4 mp/h |
| Wednesday, May 1 | Moderate 59 AQI US | 50% | 82.4° 71.6° | 15.7 mp/h |
| Thursday, May 2 | Moderate 73 AQI US | 60% | 87.8° 69.8° | 17.9 mp/h |
| Friday, May 3 | Moderate 69 AQI US | 100% | 71.6° 55.4° | 20.1 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
San Marcos air quality data attribution
1Contributor
Government Contributor
2 Data sources
Where is the cleanest air quality in San Marcos?
AQI US, Metric