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 | Low | |
 | Tree pollen | Low | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather near 4031 21st Street, San Francisco?
| Weather | Few clouds |
| Temperature | 51.8°F |
| Humidity | 81% |
| Wind | 22 mp/h |
| Pressure | 30.1 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 | San Antonio, Texas | 83 |
| 2 | New Braunfels, Texas | 77 |
| 3 | Boerne, Texas | 75 |
| 4 | Leander, Texas | 75 |
| 5 | Georgetown, Texas | 73 |
| 6 | Corpus Christi, Texas | 71 |
| 7 | Round Rock, Texas | 68 |
| 8 | Austin, Texas | 67 |
| 9 | Fort Worth, Texas | 65 |
| 10 | Marietta, Ohio | 62 |
(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 | Capp Street Garden | 67 |
| 2 | Shore View Ave | 53 |
| 3 | Baker Beach | 45 |
| 4 | Downey Street | 35 |
| 5 | Safer Together/Bernal | 28 |
| 6 | Potrero Hill 2 | 26 |
| 7 | 3398 Baker Street | 21 |
| 8 | Churchill Park | 21 |
| 9 | House Guerrero | 21 |
| 10 | Bernal Street | 20 |
(local time)
SEE WORLD AQI RANKING
US AQI
4
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 | 4 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 1µg/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 | |||
| Friday, Apr 26 | Good 4 AQI US | |||
| Today | Good 4 AQI US |  | 59° 50° |  20.1 mp/h |
| Sunday, Apr 28 | Good 16 AQI US | | 60.8° 48.2° | 20.1 mp/h |
| Monday, Apr 29 | Good 19 AQI US |  | 59° 46.4° | 15.7 mp/h |
| Tuesday, Apr 30 | Good 17 AQI US | | 59° 48.2° | 15.7 mp/h |
| Wednesday, May 1 | Good 13 AQI US | | 60.8° 51.8° | 11.2 mp/h |
| Thursday, May 2 | Good 18 AQI US |  | 57.2° 50° | 13.4 mp/h |
| Friday, May 3 | Good 16 AQI US |  70% | 53.6° 50° | 11.2 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?
- Greenwich and Laguna 0
- Valencia Street 0
- 2899 Vallejo Street 1
- 44 Fifth Avenue 1
- Capitol Avenue 1
- Castro Duncan Open Space 1
- Dolores and 28th 1
- Hudson Avenue 1
- McAllister Street 1
- Mid The Page Street 1
- Mission Bernal Hospital 1
- Potrero Hill 18th & Mississippi 1
- Presidio Heights 1
- Sait Germain Avenue 1
- The Little School 1
- Twin Peaks 1
- Financial District 2
- Ingleside Terraces 2
- Inner Sunset 2
- Lippard Avenue 2
- Pine Street & California Street 2
- Rivera Street 2
- Rivoli Street 2
- Stanyan Street 2
- Balboa Street 3
- Hidden Garden Steps 3
- Mountain Lake Park 3
- Parkmerced 3
- Potomac Street 3
- Western Addition 3
- California College of The Arts 4
- Maynard Street 2 4
- Potrero Hill 3 4
- States Street 4
- 10th and Fulton Deck 5
- 151 10th Avenue 5
- 34th Avenue & Cabrillo Street 5
- 4010 Eureka Valley 5
- Clayton St 5
- Duboce Triangle 5
- Espirit Park Roof 5
- Golden Gate 5
- Grenard Terrace 5
- Lakeview near Margaret 5
- Outer Sunset 40th & Irving 5
- Shipley Street 5
- Upper Shrader Cole Valley 5
- Visitacion Valley 5
- Warren Lex World Headquarters 5
- 333 Diamond Street 6
- 512 College Avenue 6
- Cameo Way 6
- Congo Street 6
- Cortland Avenue 6
- Greenwich Street 6
- Miraloma Park O'Shaughnessy 6
- Pine Street 6
- Quarry Road 6
- San Jose Ave and Ocean Ave 6
- Sunnyside Elementary School 6
- West of Twin Peaks 6
- 21st & Balboa 7
- 2635 16th Avenue 7
- 29th Avenue 7
- 4181 26th Street 7
- 5235 Diamond Heights Boulevard 7
- 662 Cayuga Ave 7
- 8th and Kirkham 7
- Ashbury St 7
- California Street 7
- Chenery St 500 block 7
- Edgehill Open Space Park 7
- Hickory Street 7
- Kirkham Street 7
- Laguna Street 7
- McAllister 7
- Pacific Avenue 7
- Tank Hill 7
- 181-47 Dalewood Way 8
- 351 Magellan Ave 8
- 4362 24th Street 8
- 575 Magellan Avenue 8
- Anza Vista-the_balbs 8
- Baker St 8
- Banks Street 8
- Bernal Hearts 8
- Church Street & Liberty Street 8
- Clement Street 8
- Cumberland Street 8
- Dolores Park 8
- Hazelwood at Mangels 8
- Inner Sunset 2 8
- LH Webster 8
- Mendell & La Salle Ave 8
- Mojave Street 8
- Noe Valley 8
- Oakdale Avenue 8
- Page Street 8
- Portola Street 8
- Richland near Leese 8
- Russian Hill Leavenworth 8
- Sea Cliff 8
- Silver Terrace 8
- Sunnyside 2 8
- Tennessee Street 8
- Upper Elsie Coyotes 8
- Vicksburg Street 8
- 116 Marietta Drive 9
- 12th Avenue 9
- 32nd Avenue 9
- 35 Keyes Ave 9
- 4066 23rd Street 9
- 4078 Cesar Chavez 9
- 540 Victoria Street 9
- 645 Greenwich Street 9
- 884 Silver Avenue 9
- 915 Cayuga Ave 9
- Anza Street 9
- Cow Hollow 9
- Flood Avenue 9
- Gambier Street & Burrows Street 9
- Green Street 9
- Hill House 9
- India Basin 9
- Mid Liberty Street 9
- Mississippi Street 9
- Mount Davidson Manor 9
- Pacific Primary 9
- Quintara Street 2 9
- San Carlos Street 9
- Sanchez Street 9
- Sunnyside 9
- Valley Street 9
- 141 6th Avenue 10
- 1448 Plymouth Avenue 10
- 15th and Castro St. 10
- 1741-1701 Mason St 10
- 2318 Fillmore Street 10
- 300 block Russia 10
- 313 Shotwell Street 10
- Castenada Avenue 10
- CesarChavezDolores 10
- Dolphin Club 10
- Forest Side 10
- Golden Gate Height 10
- Haight Street 10
- McLaren Avenue 10
- SF Maritime NHP 10
- Staples Avenue 10
- Tompkins Avenue 10
- Walter Street 10
- West of Twin Peaks 2 10
- 144 Funston Avenue 11
- 1770 McKinnon Avenue 11
- 19 St Charles Avenue 11
- 215 Connecticut St 11
- 23rd Street & 3rd Street 11
- 29th Ave and Judah 11
- 3801 21st Street 11
- 427 Kirkham Street 11
- Bernal Heights 4 11
- Brannan St 11
- California Tennis Club 1770 Scott 11
- Diamond Street & Conrad Street 11
- Gladys Street 11
- Greenwich 11
- Highland Avenue 11
- Jackson & Walnut 11
- James Lick 11
- Lake & 21st Avenue 11
- Lakeshore 11
- Mission District & Osage Street 11
- Molimo Drive 11
- Nob Hill 11
- Noe Street 2 11
- Pacheco Street 11
- Precita Valley 11
- Roosevelt Way 11
- Santa Rosa Avenue 11
- Sherwood Forest 11
- The Hamlin School #2 11
- Tiffany Avenue 11
- 18thAve/TaravalUlloa 12
- 607 Andover Street 12
- Bryant & 26h Street Intersection 12
- Cole Valley 12
- De Haro Blvd 12
- Lombard Street 12
- Outer Sunset-2340 42nd Ave 12
- Pacific Heights 2 12
- Pioneer Park 12
- Scott Street 12
- Sunnyside St 12
- Grand View Avenue 13
- Kensington Way 13
- Mission District 13
- Noe Valley 2 13
- Park Hill Avenue 13
- South Beach Marina Apartments 13
- 100 Block Andover 14
- 4256 22nd Street 14
- Broadway between Hyde and Larkin 14
- Buchanan and Broadway 14
- CEEP at Star 14
- Filbert Street 14
- Outer Sunset 4 14
- Pacific Heights-GEOHealth_VMT_Basadre 14
- 150 Parker Ave. 15
- 6th and Hugo Street 15
- Jersey and Vicksberg II 15
- Rincon Hill 15
- 15th and Noe Street 16
- 491 Corbett Avenue 16
- Illinois Street 16
- Ripley Street 16
- Bernal Heights 17
- St Helena Cooperative Nursery School 17
- Mission District 2 18
- Russ Street 1 18
- Telegraph Hill 18
- Parkmerced-SFSU Bay Conference Center 19
- Bernal Street 20
- 3398 Baker Street 21
- Churchill Park 21
- House Guerrero 21
- Potrero Hill 2 26
- Safer Together/Bernal 28
- Downey Street 35
- Baker Beach 45
- Shore View Ave 53
- Capp Street Garden 67
AQI US, Metric