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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 | Very high | |
 | Tree pollen | Low | |
 | Grass pollen | Very high | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in San Marcos?
| Weather | Clear sky |
| Temperature | 71.6°F |
| Humidity | 84% |
| Wind | 6.9 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Braddock, Pennsylvania | 103 |
| 2 | Maricopa, Arizona | 91 |
| 3 | Canton, Ohio | 87 |
| 4 | Palm Desert, California | 84 |
| 5 | Mecca, California | 81 |
| 6 | Townsend, Tennessee | 80 |
| 7 | Casa Grande, Arizona | 77 |
| 8 | Pahrump, Nevada | 73 |
| 9 | New Braunfels, Texas | 70 |
| 10 | San Antonio, Texas | 70 |
(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 | 65 |
(local time)
SEE WORLD AQI RANKING
US AQI
65
live AQI index
Moderate
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 65 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 16.7µg/m³ | |
!
PM2.5
x3.3
PM2.5 concentration in San Marcos is currently 3.3 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 |
|---|---|---|---|---|
| Friday, May 17 | Moderate 53 AQI US |  | 93.2° 66.2° |  6.7 mp/h |
| Saturday, May 18 | Moderate 70 AQI US |  | 91.4° 69.8° | 11.2 mp/h |
| Sunday, May 19 | Moderate 67 AQI US | | 93.2° 68° | 13.4 mp/h |
| Today | Moderate 65 AQI US | | 93.2° 68° | 13.4 mp/h |
| Tuesday, May 21 | Moderate 65 AQI US | | 95° 71.6° | 17.9 mp/h |
| Wednesday, May 22 | Moderate 63 AQI US | | 95° 75.2° | 17.9 mp/h |
| Thursday, May 23 | Moderate 56 AQI US | | 87.8° 73.4° | 17.9 mp/h |
| Friday, May 24 | Moderate 69 AQI US |  90% | 96.8° 68° | 20.1 mp/h |
| Saturday, May 25 | Moderate 87 AQI US | 70% | 100.4° 71.6° | 20.1 mp/h |
| Sunday, May 26 | Moderate 83 AQI US | 70% | 100.4° 73.4° | 17.9 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
San Marcos air quality data attribution
1Contributor
Government Contributor
2 Data sources
Where is the cleanest air quality in San Marcos?
AQI US, Metric