Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality near 3801 21st Street, San Francisco
Air quality index (AQI) and PM2.5 air pollution near 3801 21st Street, San Francisco
421 people follow this station
Air Quality Map
Real-time 3801 21st Street air pollution map
AIR QUALITY DATA CONTRIBUTORS
Find out more about contributors and data sourcesPollen
What is the pollen count in 3801 21st Street today?
 | Index | Low | |
 | Tree pollen | Low | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather near 3801 21st Street, San Francisco?
| Weather | Broken clouds |
| Temperature | 53.6°F |
| Humidity | 83% |
| Wind | 21 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Coachella, California | 155 |
| 2 | San Antonio, Texas | 132 |
| 3 | Boerne, Texas | 123 |
| 4 | Round Rock, Texas | 122 |
| 5 | Leander, Texas | 119 |
| 6 | Georgetown, Texas | 118 |
| 7 | Cedar Park, Texas | 112 |
| 8 | Lewisville, Texas | 111 |
| 9 | Austin, Texas | 94 |
| 10 | Mecca, California | 91 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live aqi station ranking
Real-time San Francisco air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | Shore View Ave | 53 |
| 2 | Sunset Co-op Nursery School | 49 |
| 3 | Downey Street | 35 |
| 4 | Mission District 2 | 33 |
| 5 | Safer Together/Bernal | 33 |
| 6 | House Guerrero | 31 |
| 7 | 3398 Baker Street | 28 |
| 8 | Baker Beach | 28 |
| 9 | St Helena Cooperative Nursery School | 28 |
| 10 | 23rd Street & 3rd Street | 26 |
(local time)
SEE WORLD AQI RANKING
US AQI
17
live AQI index
Good
Overview
What is the current air quality near 3801 21st Street, San Francisco?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 17 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 3µg/m³ | |
Health Recommendations
What is the current air quality near 3801 21st Street, San Francisco?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
3801 21st Street, San Francisco air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Tuesday, May 21 | Good 37 AQI US | |||
| Wednesday, May 22 | Good 30 AQI US | |||
| Thursday, May 23 | Good 26 AQI US | |||
| Today | Good 17 AQI US | | 53.6° 48.2° |  15.7 mp/h |
| Saturday, May 25 | Good 25 AQI US |  | 59° 48.2° | 13.4 mp/h |
| Sunday, May 26 | Good 47 AQI US |  | 59° 48.2° | 11.2 mp/h |
| Monday, May 27 | Moderate 61 AQI US  | | 59° 50° | 15.7 mp/h |
| Tuesday, May 28 | Moderate 73 AQI US | | 59° 50° | 13.4 mp/h |
| Wednesday, May 29 | Good 22 AQI US | | 60.8° 48.2° | 8.9 mp/h |
| Thursday, May 30 | Good 19 AQI US | | 64.4° 51.8° | 11.2 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
3801 21st Street air quality data attribution
Contributor
Anonymous Contributor
Data source
Data validated and calibrated by IQAirWhere is the cleanest air quality in San Francisco?
No locations are available.
AQI US, Metric