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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 SOURCE
* AQI modeled using satellite data Learn more
Weather
What is the current weather in San Marcos?
| Weather | Broken clouds |
| Temperature | 89.6°F |
| Humidity | 48% |
| Wind | 12.8 mp/h |
| Pressure | 29.7 Hg |
3D animated air pollution map
US AQI
50*
live AQI index
Good
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 50* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 12*µg/m³ | |
!
PM2.5
x2.4
PM2.5 concentration in San Marcos is currently 2.4 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in San Marcos?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
San Marcos air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Today | Good 50 AQI US | | 91.4° 71.6° |  13.4 mp/h |
| Sunday, Apr 28 | Moderate 54 AQI US  | | 89.6° 69.8° | 8.9 mp/h |
| Monday, Apr 29 | Good 44 AQI US |  90% | 93.2° 69.8° | 6.7 mp/h |
| Tuesday, Apr 30 | Good 40 AQI US | 90% | 91.4° 71.6° | 4.5 mp/h |
| Wednesday, May 1 | Good 42 AQI US | 70% | 89.6° 71.6° | 6.7 mp/h |
| Thursday, May 2 | Moderate 55 AQI US | 100% | 87.8° 73.4° | 6.7 mp/h |
| Friday, May 3 | Moderate 55 AQI US | 100% | 89.6° 71.6° | 8.9 mp/h |
| Saturday, May 4 | Moderate 55 AQI US | 80% | 93.2° 71.6° | 11.2 mp/h |
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News
The latest air quality news and resources.
Where is the cleanest air quality in San Marcos?
No locations are available.
AQI US, Metric