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 4031 21st Street, San Francisco
Air quality index (AQI) and PM2.5 air pollution near 4031 21st Street, San Francisco
371 people follow this station
Air Quality Map
Real-time 4031 21st Street air pollution map
AIR QUALITY DATA CONTRIBUTORS
Find out more about contributors and data sourcesPollen
What is the pollen count in 4031 21st Street today?
 | Index | None | |
 | Tree pollen | None | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather near 4031 21st Street, San Francisco?
| Weather | Broken clouds |
| Temperature | 53.6°F |
| Humidity | 89% |
| Wind | 17.3 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Palm Desert, California | 139 |
| 2 | Columbia, South Carolina | 83 |
| 3 | Savannah, Georgia | 75 |
| 4 | Pahrump, Nevada | 70 |
| 5 | Edmond, Oklahoma | 67 |
| 6 | Oklahoma City, Oklahoma | 66 |
| 7 | Wichita, Kansas | 66 |
| 8 | Ann Arbor, Michigan | 65 |
| 9 | Aiken, South Carolina | 61 |
| 10 | Georgetown, Texas | 59 |
(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 | 29 |
| 2 | Downey Street | 26 |
| 3 | Potrero Hill 2 | 25 |
| 4 | 3398 Baker Street | 21 |
| 5 | Safer Together/Bernal | 21 |
| 6 | Baker Beach | 15 |
| 7 | House Guerrero | 14 |
| 8 | 491 Corbett Avenue | 13 |
| 9 | Bernal Heights | 13 |
| 10 | CEEP at Star | 13 |
(local time)
SEE WORLD AQI RANKING
US AQI
21
live AQI index
Good
Overview
What is the current air quality near 4031 21st Street, San Francisco?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 21 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 5µg/m³ | |
Health Recommendations
What is the current air quality near 4031 21st Street, San Francisco?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
4031 21st Street, San Francisco air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Wednesday, Apr 24 | Good 21 AQI US | |||
| Today | Good 21 AQI US |  | 57.2° 50° |  22.4 mp/h |
| Saturday, Apr 27 | Good 11 AQI US |  | 57.2° 48.2° | 20.1 mp/h |
| Sunday, Apr 28 | Good 14 AQI US | | 59° 50° | 20.1 mp/h |
| Monday, Apr 29 | Good 21 AQI US | | 59° 48.2° | 17.9 mp/h |
| Tuesday, Apr 30 | Good 18 AQI US | | 62.6° 48.2° | 17.9 mp/h |
| Wednesday, May 1 | Good 16 AQI US | | 59° 50° | 13.4 mp/h |
| Thursday, May 2 | Good 16 AQI US | | 59° 51.8° | 15.7 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
4031 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?
- 29th Avenue 0
- 4066 23rd Street 0
- 884 Silver Avenue 0
- Clement Street 0
- Laguna Street 0
- Noe Valley 0
- San Jose Ave and Ocean Ave 0
- Upper Shrader Cole Valley 0
- 2635 16th Avenue 1
- 34th Avenue & Cabrillo Street 1
- 351 Magellan Ave 1
- 4010 Eureka Valley 1
- 512 College Avenue 1
- 540 Victoria Street 1
- Banks Street 1
- California College of The Arts 1
- Cameo Way 1
- Chenery St 500 block 1
- Dublin Street 1
- Duboce Triangle 1
- Edgehill Open Space Park 1
- Hazelwood at Mangels 1
- Hickory Street 1
- Hidden Garden Steps 1
- India Basin 1
- Inner Sunset 2 1
- Jackson & Walnut 1
- Lakeview near Margaret 1
- McAllister 1
- Nob Hill 1
- Pacheco Street 1
- Richland near Leese 1
- SF Maritime NHP 1
- Sanchez Street 1
- Sunnyside Elementary School 1
- 15th and Castro St. 2
- 313 Shotwell Street 2
- 333 Diamond Street 2
- 4362 24th Street 2
- 575 Magellan Avenue 2
- 662 Cayuga Ave 2
- 8th and Kirkham 2
- 915 Cayuga Ave 2
- Church Street & Liberty Street 2
- De Haro Blvd 2
- Diamond Street & Conrad Street 2
- Golden Gate 2
- Kirkham Street 2
- Lombard Street 2
- Miraloma Park O'Shaughnessy 2
- Pioneer Park 2
- Portola Street 2
- Russian Hill Leavenworth 2
- Shipley Street 2
- States Street 2
- Tank Hill 2
- Valley Street 2
- Visitacion Valley 2
- Warren Lex World Headquarters 2
- West of Twin Peaks 2
- 1741-1701 Mason St 3
- 181-47 Dalewood Way 3
- 21st & Balboa 3
- 32nd Avenue 3
- California Street 3
- Capp Street Garden 3
- Castenada Avenue 3
- Cortland Avenue 3
- Cow Hollow 3
- Cumberland Street 3
- Dolores Park 3
- Espirit Park Roof 3
- Gambier Street & Burrows Street 3
- Gladys Street 3
- Haight Street 3
- LH Webster 3
- McLaren Avenue 3
- Mississippi Street 3
- Oakdale Avenue 3
- Pacific Primary 3
- Page Street 3
- Sea Cliff 3
- Sunnyside 2 3
- Telegraph Hill 3
- Tennessee Street 3
- Vicksburg Street 3
- West of Twin Peaks 2 3
- 116 Marietta Drive 4
- 4078 Cesar Chavez 4
- 427 Kirkham Street 4
- Anza Street 4
- Anza Vista-the_balbs 4
- Bernal Heights 4 4
- Brannan St 4
- Cole Valley 4
- Filbert Street 4
- Flood Avenue 4
- Golden Gate Height 4
- Greenwich 4
- Highland Avenue 4
- Lakeshore 4
- Mid Liberty Street 4
- Mojave Street 4
- Santa Rosa Avenue 4
- Silver Terrace 4
- Staples Avenue 4
- Tompkins Avenue 4
- 1448 Plymouth Avenue 5
- 1770 McKinnon Avenue 5
- 19 St Charles Avenue 5
- 2305 Golden Gate Avenue 5
- 2318 Fillmore Street 5
- 300 block Russia 5
- 4181 26th Street 5
- Baker St 5
- California Tennis Club 1770 Scott 5
- CesarChavezDolores 5
- Churchill Park 5
- Forest Side 5
- Jersey and Vicksberg II 5
- Mission District 5
- Noe Street 2 5
- Precita Valley 5
- Quintara Street 2 5
- South Beach Marina Apartments 5
- The Hamlin School #2 5
- Walter Street 5
- 100 Block Andover 6
- 215 Connecticut St 6
- 3801 21st Street 6
- 6th and Hugo Street 6
- Bernal Street 6
- Kensington Way 6
- Lake & 21st Avenue 6
- Mission District & Osage Street 6
- Park Hill Avenue 6
- Sherwood Forest 6
- Sunnyside 6
- Sunnyside St 6
- Tiffany Avenue 6
- 141 6th Avenue 7
- 18thAve/TaravalUlloa 7
- 23rd Street & 3rd Street 7
- 29th Ave and Judah 7
- 35 Keyes Ave 7
- 607 Andover Street 7
- Broadway between Hyde and Larkin 7
- Bryant & 26h Street Intersection 7
- Dolphin Club 7
- James Lick 7
- Molimo Drive 7
- Outer Sunset-2340 42nd Ave 7
- Pacific Heights 2 7
- Roosevelt Way 7
- Scott Street 7
- Grand View Avenue 8
- Illinois Street 8
- Outer Sunset 4 8
- Rincon Hill 8
- 144 Funston Avenue 9
- 150 Parker Ave. 9
- 15th and Noe Street 9
- 4256 22nd Street 9
- Buchanan and Broadway 9
- Noe Valley 2 9
- Pacific Heights-GEOHealth_VMT_Basadre 9
- Parkmerced-SFSU Bay Conference Center 9
- Russ Street 1 9
- Ripley Street 10
- St Helena Cooperative Nursery School 12
- 491 Corbett Avenue 13
- Bernal Heights 13
- CEEP at Star 13
- Mission District 2 13
- House Guerrero 14
- Baker Beach 15
- 3398 Baker Street 21
- Safer Together/Bernal 21
- Potrero Hill 2 25
- Downey Street 26
- Shore View Ave 29
AQI US, Metric