Air Quality in San Mateo Today: A Comprehensive Guide
Are you a San Mateo resident or visitor wondering about the air quality today? You've come to the right place. This comprehensive guide will provide you with up-to-date information, helpful tips, and local resources to stay informed and breathe easy in San Mateo.
Current Air Quality Index (AQI) in San Mateo
The Air Quality Index (AQI) is a scale used to communicate air quality levels and potential health effects. It ranges from 0 to 500, with higher values indicating worse air quality. Here's the latest AQI for San Mateo:
| Pollutant | Level | Health Concern |
|---|---|---|
| PM2.5 | 42 | Moderate |
| PM10 | 35 | Good |
| Ozone | 54 | Moderate |
Source: AirNow

Understanding Air Quality Levels
- Good (0-50): Air quality is considered satisfactory, and air pollution poses little or no risk.
- Moderate (51-100): Air quality is acceptable; however, some people may be more sensitive to air pollution, such as children, older adults, and those with heart or lung diseases.
- Unhealthy for Sensitive Groups (101-150): Members of sensitive groups may experience health effects; the general public is less likely to be affected.
- Unhealthy (151-200): Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
- Very Unhealthy (201-300): Health alert: everyone is more likely to be affected.
- Hazardous (301+): Health warning of emergency conditions. Everyone is at risk.
Local Air Quality Resources
Stay informed about San Mateo's air quality with these local resources:
- AirNow: Provides real-time air quality data and forecasts.
- Bay Area Air Quality Management District (BAAQMD): Offers local air quality information and tips for improving air quality.
- City of San Mateo - Air Quality: Find local air quality news and resources from the city's official website.
Tips for Improving Air Quality in San Mateo
Here are some tips to help improve air quality in San Mateo:
- Carpool, use public transportation, or bike to reduce vehicle emissions.
- Plant trees and maintain your garden to help absorb pollutants and produce oxygen.
- Use electric or battery-powered lawn equipment instead of gas-powered tools.
- Support local policies that promote clean air and reduce emissions.
By staying informed and taking action, we can all help improve air quality in San Mateo. Check back regularly for updates on air quality and tips for staying healthy in our beautiful city.