AddAir quality in San Marcos
Air quality index (AQI⁺) and PM2.5 air pollution in San Marcos • 10 Followers • 12:00, May 19 Local time
69*
US AQI⁺Moderate
Main pollutant:
PM2.5
19.1 µg/m³
37°
10 km/h
51 %
Hourly forecast
San Marcos air quality index (AQI⁺) forecast
Daily forecast
San Marcos air quality index (AQI⁺) forecast
| Today | 68 | | 37° 23° |  11 km/h | 74% |
| Wed | 68 |  | 37° 24° | 11 km/h | 73% |
| Thu | 61 | | 39° 24° | 14 km/h | 66% |
Air pollutants
What is the current air quality in San Marcos?
PM2.5 concentration is currently 3.8 times the World Health Organization annual PM2.5 guideline value.
Health recommendations
 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 |
Protect yourself from air pollution in San Marcos
Monitor the air you breathe
Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.
Medical grade air purifiers
Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.
Powerful, stylish air purifiers
Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.
Health recommendations
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 |
Protect yourself from air pollution in San Marcos
Monitor the air you breathe
Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.
Medical grade air purifiers
Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.
Powerful, stylish air purifiers
Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.
Most polluted locations near San Marcos
Worldwide AQI⁺ ranking
Historic air quality near San Marcos
History
Historic air quality graph for San Marcos
Historic air quality near San Marcos
History
Historic air quality graph for San Marcos
Most polluted locations near San Marcos
Worldwide AQI⁺ ranking
