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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
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Pollen
What is the pollen count in San Marcos today?
 | Index | Low | |
 | Tree pollen | Low | |
 | Grass pollen | Low | |
 | Weed pollen | None |
Weather
What is the current weather in San Marcos?
| Weather | Broken clouds |
| Temperature | 55.4°F |
| Humidity | 82% |
| Wind | 3.4 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 | El Centro, California | 153 |
| 2 | San Bernardino, California | 87 |
| 3 | Visalia, California | 83 |
| 4 | The Woodlands, Texas | 80 |
| 5 | Casa Grande, Arizona | 78 |
| 6 | Corpus Christi, Texas | 77 |
| 7 | Fontana, California | 76 |
| 8 | Van Nuys, California | 74 |
| 9 | Palm Desert, California | 72 |
| 10 | Riverside, California | 72 |
(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 | Tucana Drive | 24 |
| 2 | CSUSM COMMONS | 23 |
(local time)
SEE WORLD AQI RANKING
US AQI
23
live AQI index
Good
Overview
What is the current air quality in San Marcos?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 23 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 5.6µg/m³ | |
!
PM2.5
x1.1
PM2.5 concentration in San Marcos is currently 1.1 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 |
|---|---|---|---|---|
| Tuesday, Apr 16 | Good 12 AQI US |  | 71.6° 53.6° |  8.9 mp/h |
| Wednesday, Apr 17 | Good 17 AQI US | | 68° 53.6° | 11.2 mp/h |
| Thursday, Apr 18 | Good 21 AQI US | | 66.2° 53.6° | 8.9 mp/h |
| Today | Good 23 AQI US | | 66.2° 53.6° | 8.9 mp/h |
| Saturday, Apr 20 | Good 31 AQI US | | 69.8° 51.8° | 11.2 mp/h |
| Sunday, Apr 21 | Good 32 AQI US | | 73.4° 55.4° | 8.9 mp/h |
| Monday, Apr 22 | Good 40 AQI US |  | 69.8° 57.2° | 8.9 mp/h |
| Tuesday, Apr 23 | Good 18 AQI US | | 64.4° 53.6° | 11.2 mp/h |
| Wednesday, Apr 24 | Good 15 AQI US | | 62.6° 51.8° | 11.2 mp/h |
| Thursday, Apr 25 | Good 16 AQI US |  20% | 62.6° 53.6° | 11.2 mp/h |
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News
The latest air quality news and resources.
San Marcos air quality data attribution
2Contributors
- 2 Anonymous contributors
2 stations
2 Anonymous Contributors
1 Data source
Data validated and calibrated by IQAirWhere is the cleanest air quality in San Marcos?
AQI US, Metric