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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 | Low | |
 | Tree pollen | None | |
 | Grass pollen | Low | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in San Marcos?
| Weather | Scattered clouds |
| Temperature | 89.6°F |
| Humidity | 68% |
| Wind | 13.8 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Boerne, Texas | 95 |
| 2 | San Antonio, Texas | 93 |
| 3 | New Braunfels, Texas | 87 |
| 4 | Austin, Texas | 81 |
| 5 | San Fernando, California | 77 |
| 6 | Pahrump, Nevada | 75 |
| 7 | Georgetown, Texas | 74 |
| 8 | Hollywood, California | 71 |
| 9 | La Crescenta-Montrose, California | 71 |
| 10 | Round Rock, 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 | 69 |
(local time)
SEE WORLD AQI RANKING
US AQI
69
live AQI index
Moderate
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 69 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 19µg/m³ | |
| O3 | 88µg/m³ | |
!
PM2.5
x3.8
PM2.5 concentration in San Marcos is currently 3.8 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 |
|---|---|---|---|---|
| Wednesday, May 29 | Moderate 57 AQI US |  | 91.4° 71.6° |  17.9 mp/h |
| Thursday, May 30 | Good 43 AQI US  | | 89.6° 64.4° | 15.7 mp/h |
| Friday, May 31 | Good 46 AQI US | | 89.6° 69.8° | 11.2 mp/h |
| Friday, May 31 | Moderate 69 AQI US | 40% | 89.6° 69.8° | 11.2 mp/h |
| Today | Moderate 69 AQI US | 50% | 96.8° 73.4° | 17.9 mp/h |
| Sunday, Jun 2 | Moderate 57 AQI US | 100% | 98.6° 73.4° | 22.4 mp/h |
| Monday, Jun 3 | Moderate 57 AQI US | 100% | 96.8° 75.2° | 22.4 mp/h |
| Tuesday, Jun 4 | Moderate 57 AQI US | 90% | 98.6° 73.4° | 15.7 mp/h |
| Wednesday, Jun 5 | Moderate 63 AQI US | | 98.6° 71.6° | 13.4 mp/h |
| Thursday, Jun 6 | Moderate 75 AQI US | | 98.6° 71.6° | 13.4 mp/h |
| Friday, Jun 7 | Moderate 80 AQI US | | 100.4° 73.4° | 15.7 mp/h |
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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