AddAir quality in San Mateo County
Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo County • 15 Followers • 23:00, May 31 Local time
24
US AQI⁺Good
Main pollutant:
PM2.5
4.3 µg/m³
16°
3 km/h
51 %
Hourly forecast
San Mateo County air quality index (AQI⁺) forecast
Daily forecast
San Mateo County air quality index (AQI⁺) forecast
| Today | 38 |  | 21° 15° |  9 km/h | 58% |
| Tue | 33 | | 19° 11° | 12 km/h | 72% |
| Wed | 46 | | 19° 11° | 17 km/h | 68% |
Air pollutants
What is the current air quality in San Mateo County?
PM2.5 concentration currently meets the WHO annual PM2.5 guideline.
Health recommendations
 Enjoy outdoor activities |
 Open your windows to bring clean, fresh air indoors Get a monitor |
Protect yourself from air pollution in San Mateo County
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.
Pollen
What is the pollen count in San Mateo County today?
Index
High
 Tree None | 0% |
 Grass High | 75% |
 Weed None | 0% |
Source:
wetter.comHealth recommendations
Enjoy outdoor activities |
Open your windows to bring clean, fresh air indoors Get a monitor |
Pollen
What is the pollen count in San Mateo County today?
Index
High
Tree None | 0% |
Grass High | 75% |
Weed None | 0% |
Source:
wetter.comProtect yourself from air pollution in San Mateo County
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 Mateo County
Worldwide AQI⁺ ranking
Station ranking
Real-time AQI⁺ station ranking for stations in San Mateo County
Historic air quality near San Mateo County
History
Historic air quality graph for San Mateo County
Historic air quality near San Mateo County
History
Historic air quality graph for San Mateo County
Most polluted locations near San Mateo County
Worldwide AQI⁺ rankingStation ranking
Real-time AQI⁺ station ranking for stations in San Mateo County
Measure your own air quality
Get a monitor and contribute air quality data in your city.
Learn more about global air quality
Where is the cleanest air quality in San Mateo County?
- Experimental Facilities Dept Shops EFD8
- Star Hill Road station10
- Upland Road14
- Newton Drive17
- Santa Clara Avenue at Barton Street17
- Bear Gulch Road20
- Top of Kings Mountain20
- Durham Road21
- Dirt Alpine22
- Kings Mountain North22
- Skyline Boulevard22
- 480 Tunitas Creek Road23
- Alpine Road23
- Filbert Road23
- Los Trancos Road23
- Menlo Oaks23
- Portola Hts - 5 Points23
- Sand Hill Road station23
- Skyline - Chapman Rd23
- Stanford Weekend Acres23
- 265 Old Spanish Trail24
- Kings Mountain North #224
- Old Spanish Trail24
- Palomar Park24
- West Ranch Road24
- Alexander Avenue25
- Rocky Creek Road25
- Skyline Boulevard MAC26
- Ware Road26
- 920 Bear Gulch Road27
- Cerrito Avenue27
- Belle Roche Court28
- Lynton Avenue28
- Skyline Resort28
- Alberta Glen29
- Talbot Avenue - East Sharp Park29
- Arlington Way30
- San Gregorio30
- Stockbridge near Alameda55
