Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in California
Air quality index (AQI) and PM2.5 air pollution in California
LIVE AQI CITY RANKING
Real-time California
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Westmorland | 84 |
| 2 | Oceano | 68 |
| 3 | Rough and Ready | 62 |
| 4 | Highland | 58 |
| 5 | Mecca | 50 |
| 6 | Baldwin Park | 49 |
| 7 | Ontario | 48 |
| 8 | Bloomington | 46 |
| 9 | Brawley | 44 |
| 10 | Koreatown | 42 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
5627 Contributors
See all
LIVE AQI CITY RANKING
Real-time California
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Lake San Marcos | 0 |
| 2 | Acalanes Ridge | 1 |
| 3 | Capitola | 1 |
| 4 | Laguna | 1 |
| 5 | Laguna Woods | 1 |
| 6 | San Miguel | 1 |
| 7 | Templeton | 1 |
| 8 | Burbank | 2 |
| 9 | Byron | 2 |
| 10 | Midpines | 2 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
News
The latest air quality news and resources.
California air quality data attribution
5627Contributors
- California Air Resources Board (CARB)
226 stations
- Spare the Air - Sacramento Region
13 stations
USA National Park Service24 stations
+banner.jpg)
El Dorado County Air Quality Management District11 stations
Palo Alto OES1 station
19 Government Contributors
Coalition for Clean Air (CCA)247 stations
Climate First: Replacing Oil and Gas (CFROG)3 stations
ActiveSGV - Active San Gabriel Valley1 station
- Safer Together San Francisco
1 station
5 Non-profit organization Contributors
- Oakland Unified School District
9 stations
- Coachella Valley Unified School District
9 stations
- El Centro Elementary School District
2 stations
- Ackerman Charter School District
1 station
Ravenswood City School District IOT2 stations
- West Contra Costa Unified School District
3 stations
Harvard-Westlake School3 stations
- Calexico Unified School District
2 stations
- Livermore Valley Unified School District
1 station
- Plaza Community Services La Roca Verde
1 station
- Los Angeles Unified School District
1 station
- nora caruso
1 station
- Rialto Unified School District
1 station
Grove Preschool2 stations
USC Environmental Health Centers1 station
15 Educational Contributors
Baldacci Family Vineyards1 station
Scribe Winery1 station
Forster Ranch1 station
IQAir Air Quality Science Team5 stations
- Stripe
1 station
5 Corporate Contributors
- Weledelzeergeleerde Heer
1 station
Pat Conway1 station
- Gustavo R. Guimarães
1 station
Aaron Solochek1 station
- GDH
1 station
- Steve
9 stations
- RSM1
1 station
- Timothy Wilson
1 station
- -
1 station
- ddavies0001
2 stations
- IQAir community Member
1 station
- Nathan Pyle, MA
1 station
- justin bright
1 station
Hunter1 station
- Chuck Kissner
1 station
- Chris
1 station
- Alejandra Perez
1 station
- CK
1 station
- chris
1 station
- Ben
1 station
- Brent
1 station
- JT
1 station
- IQAir Community Member
1 station
- Charlie Leonard
1 station
- AC
1 station
Camille1 station
Nick Chapman1 station
- IQAir Community Member
1 station
- Jeremy
1 station
KellerG1 station
- IQAir Community Member
1 station
- Anonymous
1 station
janet fouts1 station
- dra
1 station
- Phong Nguyen
1 station
- WH57
1 station
- kevin
1 station
- Igor Solomennikov
1 station
- Anonymous
2 stations
- Mat Henley
1 station
BS2 stations
- tripleD
1 station
- IQAir PDR Member
1 station
- Dan P
1 station
- Travis Thompson
1 station
Lane@IQAir1 station
- Chandler Dunlap - Dutch Bros
2 stations
- Anonymous
1 station
- IQAir Community Member
1 station
- Jen & Jason Van Dinter
1 station
- Robert M
1 station
- A & O Aryal
1 station
Daniel Rich1 station
treemocker1 station
Friendly Neighbor1 station
- FlyGirl
1 station
- Lars
1 station
Hippopo1 station
- Hogwarts
1 station
- Stephen Schlie
1 station
- Shawn
1 station
- Brian Morton
1 station
- efeff
1 station
- Brian Goshorn
1 station
- Spongebob Airpants
1 station
- Anonymous
1 station
- Matt
1 station
- William
1 station
- A.Kuehlmann
1 station
ChemistChristi1 station
- Leslie Barnes
1 station
- Hugh Wimberly
1 station
Upavas1 station
- Max C
1 station
HGR barn1 station
anonymous1 station
Jim Minton1 station
- Ben
1 station
- JMA
1 station
- anonymoose
1 station
Jim Cornick1 station
- Michael Nielsen
1 station
- C.L.
1 station
Will Mason2 stations
- Meinrat Andreae
1 station
- nontexan
1 station
- Simon Walker
1 station
Anonymous1 station
chubert1 station
- Randy Steen
1 station
- Lorien
1 station
- Karl8704
1 station
- Wim Coekaerts
1 station
Darell1 station
AL1 station
Red Dog Ranch1 station
- Adam
1 station
- Jonathan Sorenson
1 station
- Mark Legassie
1 station
- Anonymous
1 station
- Michi Watchdog
1 station
- EJ
1 station
- Nicklas Johnson
1 station
- John Grossman
1 station
- KKastle IQ
1 station
- Erina Love
1 station
- Margot
1 station
- FamilyD
1 station
JGM1 station
Pacific View Air1 station
- GB
1 station
- Sasha
1 station
JC1 station
- Wikinaut
1 station
- Matt Newkirk
1 station
- russ
1 station
- chono
1 station
- msuttie
1 station
- rkjunior
1 station
J1 station
- Erik Bjorling
1 station
- Quail Mountain Lane
1 station
- Logan Bruns
1 station
- rbernabe
1 station
- KBT
1 station
- mjburns
1 station
- Anonymous
1 station
- quick.wood7910
1 station
- Patrick
1 station
- kelp
1 station
- GB
1 station
Neighborhood Brush Creek1 station
- IQAir Community Member
1 station
Brink1 station
Caspar1 station
Aaron Graf1 station
- Jack
1 station
- khowser10
1 station
- Integrity
1 station
- ucweather
1 station
Sanchez Way1 station
- Willow Glen - Sandra
1 station
- David
1 station
- variousplaces
1 station
- John Wright
1 station
- Robert Hawthorne
1 station
- Shrisha Radhakrishna
1 station
- Rana Rekhi
1 station
- Shearwater
1 station
- bearklaw
1 station
- Tom Bacus
1 station
- Sierra
1 station
- BJ
1 station
- eliotsensor
1 station
- Anonymous
1 station
- kpurvis
1 station
SP1 station
- David T
1 station
Rob Darby1 station
Tom Conrad1 station
- Chuck Tyler
1 station
- Chris Minick
1 station
- LHJB
1 station
- csm10495
1 station
- Steve Taubman
1 station
- Eric Sun
1 station
- Terrace 500
1 station
- Grid Man
1 station
- Gennady
1 station
- johnnygerman
1 station
michael price1 station
- Allen Hutchison
1 station
Stephen Franklin1 station
- E P
1 station
- alesl
1 station
- Jeff Kessler
1 station
- Jim Crawford
1 station
- JS
1 station
- Stan Watt
1 station
- David P. Balogh
1 station
180 Individual Contributors
5403 Anonymous contributors5403 stations
5403 Anonymous Contributors
13 Data sources
PurpleAir
Clarity Movement Co.- California Air Resources Board (CARB)
AirNow
IQAir- Spare the Air - Sacramento Region
- San Diego County Air Pollution Control District (SDAPCD)
Imperial County Department of Toxic Substance and Comite Civico del Valle- San Joaquin Valley Air Pollution Control District
- Bay Area Air Quality Management District (BAAQMD)
Imperial County Air Pollution Control District (ICAPCD)- USA National Park Service
Santa Barbara County Air Pollution Control District
Which is the most polluted city in California?
- Gridley 153
- Westmorland 84
- Oceano 68
- Rough and Ready 62
- Highland 58
- Mecca 50
- Baldwin Park 49
- Ontario 48
- Bloomington 46
- Brawley 44
- Kern 43
- Koreatown 42
- Avocado Heights 41
- Bell Gardens 41
- Cerritos 41
- East La Mirada 41
- Glen Avon 41
- La Palma 41
- La Puente 41
- Montebello 41
- Placentia 41
- Rowland Heights 41
- Santa Fe Springs 41
- South El Monte 41
- South San Gabriel 41
- South San Jose Hills 41
- South Whittier 41
- Stanton 41
- Valinda 41
- Villa Park 41
- West Puente Valley 41
- West Whittier-Los Nietos 41
- Artesia 40
- Bellflower 40
- Commerce 40
- East Los Angeles 40
- Garden Grove 40
- Hawaiian Gardens 40
- Los Alamitos 40
- North El Monte 40
- Paramount 40
- Walnut 40
- Walnut Park 40
- Westminster 40
- Burney 39
- East Pasadena 39
- East Rancho Dominguez 39
- East San Gabriel 39
- Echo Park 39
- El Cerrito Corona 39
- Florence-Graham 39
- Home Gardens 39
- Irwindale 39
- Los Serranos 39
- Mayflower Village 39
- Midway City 39
- Norco 39
- Rossmoor 39
- Shafter 39
- Temple City 39
- Westmont 39
- Yucca Valley 39
- Bradbury 38
- California City 38
- Charter Oak 38
- Chino 38
- Citrus 38
- Covina 38
- El Cajon 38
- Foothill Ranch 38
- Fountain Valley 38
- Highgrove 38
- Jurupa Valley 38
- Lennox 38
- March Air Force Base 38
- Montclair 38
- Pedley 38
- Portola Hills 38
- Rubidoux 38
- San Dimas 38
- Sunnyslope 38
- Vincent 38
- West Athens 38
- West Rancho Dominguez 38
- Woodcrest 38
- Alondra Park 37
- Azusa 37
- Calipatria 37
- Del Aire 37
- Glendora 37
- Grand Terrace 37
- La Jolla 37
- Ladera Heights 37
- Mead Valley 37
- San Antonio Heights 37
- Vista Santa Rosa 37
- Century City 36
- Indian Wells 36
- Laguna Hills 36
- Lawndale 36
- Mentone 36
- Muscoy 36
- North Hollywood 36
- Oasis 36
- Reseda 36
- Bermuda Dunes 35
- Coto De Caza 35
- Good Hope 35
- La Mesa 35
- Rancho Mirage 35
- Thousand Palms 35
- Universal City 35
- Van Nuys 35
- Boyle Heights 34
- Desert Edge 34
- Desert Shores 34
- Dinuba 34
- Garnet 34
- Meadowbrook 34
- Nuevo 34
- Palos Verdes Estates 34
- San Bernardino 34
- Willowbrook 34
- Banning 33
- Cabazon 33
- Canyon Lake 33
- Dirty Socks 33
- Hollywood 33
- Idyllwild 33
- Indio 33
- Maywood 33
- Newhall 33
- Quail Valley 33
- Rancho Penasquitos 33
- Red Bluff 33
- Rialto 33
- Romoland 33
- San Pedro 33
- South Gate 33
- Sun City 33
- Aliso Viejo 32
- Beaumont 32
- Compton 32
- East Hemet 32
- Green Acres 32
- Homeland 32
- Lakeland Village 32
- Menifee 32
- Orange 32
- Rolling Hills 32
- Sunland 32
- Valle Vista 32
- Aguanga 31
- Cudahy 31
- Las Flores 31
- Murrieta Hot Springs 31
- Northridge 31
- Sedco Hills 31
- Wildomar 31
- Camp Pendleton South 30
- Carson 30
- Gardena 30
- Hidden Hills 30
- North Hills 30
- Rainbow 30
- Riverside 30
- Shandon 30
- Yosemite Valley 30
- Big Bear City 29
- Bonsall 29
- Bostonia 29
- Camp Pendleton North 29
- Casa de Oro-Mount Helix 29
- Cathedral City 29
- Colton 29
- Cypress 29
- Eucalyptus Hills 29
- Fairbanks Ranch 29
- Granite Hills 29
- Hanford 29
- Heber 29
- Hidden Meadows 29
- Imperial 29
- La Jolla Shores 29
- La Presa 29
- Mira Mesa 29
- Nipomo 29
- Phelan 29
- Portola 29
- Rancho San Diego 29
- San Gabriel 29
- San Pasqual 29
- Seeley 29
- Sorrento Valley 29
- Tehama 29
- Trona 29
- Venice 29
- Winter Gardens 29
- Agoura 28
- Calexico 28
- Chula Vista 28
- Crest 28
- Harbison Canyon 28
- Holtville 28
- Huntington Park 28
- Imperial Beach 28
- Jamul 28
- La Habra 28
- Lynwood 28
- Maricopa 28
- National City 28
- Rancho Santa Margarita 28
- Visalia 28
- Arroyo Grande 27
- Bayview 27
- Clovis 27
- El Segundo 27
- Humboldt Hill 27
- Huron 27
- Joshua Tree 27
- Julian 27
- Lomita 27
- Merced 27
- Modesto 27
- Mojave 27
- San Diego Country Estates 27
- Signal Hill 27
- Silver Lake 27
- Bakersfield 26
- Bertsch-Oceanview 26
- Canoga Park 26
- Chatsworth 26
- Cutten 26
- Fresno 26
- Morro Bay 26
- Mountain View Acres 26
- Myrtletown 26
- Pine Hills 26
- Redlands 26
- San Benito 26
- San Fernando 26
- Santa Susana 26
- Alhambra 25
- Bill Stanley 25
- Caspar 25
- China Lake Acres 25
- Claremont 25
- Coachella 25
- Descanso 25
- El Centro 25
- Fort Bragg 25
- Lebec 25
- Madera 25
- Old Fig Garden 25
- Palm Desert 25
- Pine Valley 25
- Rio Dell 25
- San Diego 25
- Tracy 25
- Westwood 25
- Yosemite Np Turtleback Dome 25
- Anaheim 24
- Ceres 24
- Crestline 24
- Inyokern 24
- Ladera Ranch 24
- Los Angeles 24
- Monrovia 24
- Monterey Park 24
- Orcutt 24
- San Jacinto 24
- San Marino 24
- Solano 24
- South Pasadena 24
- Twentynine Palms 24
- West Hollywood 24
- Bell 23
- Bishop 23
- Bodfish 23
- Encino 23
- Fallbrook 23
- Fontana 23
- June Lake 23
- Olancha 23
- Palm Springs 23
- San Pablo 23
- Shadow Hills 23
- Spring Valley Lake 23
- Tranquillity 23
- Yucaipa 23
- Blythe 22
- Loma Linda 22
- Niland 22
- Pasadena 22
- Pomona 22
- Ridgecrest 22
- Salton City 22
- Spring Valley 22
- Tujunga 22
- Turlock 22
- Agua Dulce 21
- Bonita 21
- Corcoran 21
- Fullerton 21
- Glendale 21
- Hemet 21
- Isla Vista 21
- Kirkwood 21
- Lone Pine 21
- Moreno Valley 21
- San Joaquin 21
- Sequoia National Park 21
- Weldon 21
- Westlake Village 21
- Winchester 21
- Acton 20
- Adelanto 20
- Arcadia 20
- Bodega Bay 20
- Buena Park 20
- Buttonwillow 20
- Corona 20
- Desert Hot Springs 20
- Duarte 20
- Ford City 20
- Greenacres 20
- La Verne 20
- Lakeview 20
- Long Beach 20
- Nevada County 20
- Patterson 20
- Pinon Hills 20
- Piru 20
- Rosamond 20
- Rosedale 20
- Santa Ana 20
- Searles Valley 20
- Sherman Oaks 20
- Sky Valley 20
- South Taft 20
- Taft Heights 20
- Anza 19
- Beverly Hills 19
- Chester 19
- Hacienda Heights 19
- Kernville 19
- Klamath 19
- La Habra Heights 19
- La Mirada 19
- Lamont 19
- Lost Hills 19
- McFarland 19
- Mono 19
- North Tustin 19
- Oceanside 19
- Palmdale 19
- Quincy 19
- Springville 19
- Studio City 19
- Sun Village 19
- Terra Bella 19
- Weedpatch 19
- West Carson 19
- West Covina 19
- Whittier 19
- Alpaugh 18
- Arvin 18
- Borrego Springs 18
- Carlsbad 18
- Coronado 18
- Desert View Highlands 18
- Diamond Bar 18
- Earlimart 18
- El Rio 18
- Encinitas 18
- Fort Irwin 18
- Golden Hills 18
- Hesperia 18
- Keeler 18
- Lake Los Angeles 18
- Leona Valley 18
- Littlerock 18
- Mesa Verde 18
- Miramonte 18
- Norwalk 18
- Oak Hills 18
- Pixley 18
- Redondo Beach 18
- Richgrove 18
- Saticoy 18
- Sierra Madre 18
- Teviston 18
- Tuolumne City 18
- Upland 18
- View Park-Windsor Hills 18
- Vista 18
- Woodland Hills 18
- Big River 17
- Channel Islands Beach 17
- Chino Hills 17
- East Porterville 17
- Escalon 17
- Frazier Park 17
- Hayfork 17
- Lake Elsinore 17
- Lakeside 17
- Lakewood 17
- Macdoel 17
- Marina del Rey 17
- Meiners Oaks 17
- Mira Monte 17
- Mission Viejo 17
- Poplar-Cotton Center 17
- Porterville 17
- Rancho Cucamonga 17
- Rancho Tehama Reserve 17
- Silver Lakes 17
- Stallion Springs 17
- Strathmore 17
- Tipton 17
- Tuolumne 17
- Victorville 17
- West Hills 17
- Woodville 17
- Wrightwood 17
- Altadena 16
- Apple Valley 16
- Biggs 16
- Broadmoor 16
- Brooktrails 16
- Calimesa 16
- Camp Meeker 16
- Camp Nelson 16
- Culver City 16
- Del Mar 16
- Edwards Air Force Base 16
- Eureka 16
- Exeter 16
- Fort Jones 16
- Glenn 16
- Happy Camp 16
- Hydesville 16
- Inglewood 16
- La Canada Flintridge 16
- La Quinta 16
- Laguna Niguel 16
- Lemon Grove 16
- Lindsay 16
- Mammoth Lakes 16
- Middletown 16
- Morongo Valley 16
- Murrieta 16
- North Edwards 16
- Oxnard 16
- Palo Cedro 16
- Ramona 16
- San Andreas 16
- Simi Valley 16
- South Oroville 16
- Summerland 16
- Toro Canyon 16
- Torrance 16
- Vandenberg Air Force Base 16
- Warner Springs 16
- Agoura Hills 15
- Alpine 15
- Barstow 15
- Boron 15
- Camarillo 15
- Chico 15
- Colma 15
- Dana Point 15
- Delano 15
- Downey 15
- Dunsmuir 15
- East Sonora 15
- Escondido 15
- Farmersville 15
- Ferndale 15
- Gasquet 15
- Goshen 15
- Hume 15
- Inyo 15
- Ivanhoe 15
- Kettleman City 15
- Lake Forest 15
- Lake Isabella 15
- Loma Rica 15
- London 15
- Marysville 15
- Matheny 15
- McCloud 15
- Minkler 15
- Mission Hills 15
- North Auburn 15
- Oak View 15
- Oakhurst 15
- Oildale 15
- Orange Cove 15
- Orland 15
- Paradise 15
- Pasatiempo 15
- Patterson Tract 15
- Perris 15
- Rancho Palos Verdes 15
- Redding 15
- San Clemente 15
- Santee 15
- Seal Beach 15
- Sleepy Hollow 15
- Soulsbyville 15
- Squaw Valley 15
- Trabuco Canyon 15
- Tulelake 15
- Vandenberg Village 15
- Visitacion Valley 15
- Wofford Heights 15
- Woodlake 15
- Yreka 15
- Armona 14
- Barstow Heights 14
- Cedar Ridge 14
- Coalinga 14
- Coleville 14
- Deer Park 14
- Del Rey 14
- Easton 14
- Graeagle 14
- Grass Valley 14
- Green Valley 14
- Hawthorne 14
- Home Garden 14
- Irvine 14
- Kingsburg 14
- Lancaster 14
- Laton 14
- Lemoore 14
- Lenwood 14
- Lompico 14
- Los Alamos 14
- McKinleyville 14
- Mount Hermon 14
- Needles 14
- Opal Cliffs 14
- Pico Rivera 14
- Redwood Shores 14
- Rolling Hills Estates 14
- Santa Barbara 14
- Santa Monica 14
- Scotia 14
- Selma 14
- Shasta 14
- Shasta Lake 14
- Sisquoc 14
- Stratford 14
- Sunnyside-Tahoe City 14
- Thousand Oaks 14
- Topanga 14
- Willow Creek 14
- Yorba Linda 14
- Alta Sierra 13
- Alturas 13
- Antelope 13
- Arnold 13
- Ashland 13
- Avenal 13
- Big Bear Lake 13
- Big Pine 13
- Bonadelle Ranchos-Madera Ranchos 13
- Callender 13
- Carmel Valley Village 13
- Casa Conejo 13
- Castaic 13
- Cayucos 13
- Cherry Valley 13
- Cherryland 13
- Cottonwood 13
- Delhi 13
- Denair 13
- El Granada 13
- Empire 13
- Foothill Farms 13
- Fowler 13
- Grover Beach 13
- Huntington Beach 13
- Janesville 13
- Kelso 13
- La Crescenta-Montrose 13
- Lakehead-Lakeshore 13
- Le Grand 13
- Lee Vining 13
- Lemoore Station 13
- Lewiston 13
- Linda 13
- Los Molinos 13
- Montague 13
- Montalvin 13
- Mountain Ranch 13
- Newport Beach 13
- North Highlands 13
- North Richmond 13
- Oak Park 13
- Ojai 13
- Olivehurst 13
- Pacifica 13
- Planada 13
- Plumas Lake 13
- Red Corral 13
- Rio Vista 13
- Riverbank 13
- Rollingwood 13
- Roseland 13
- San Lorenzo 13
- Santa Paula 13
- Seacliff 13
- Sheridan 13
- South San Francisco 13
- South Yuba City 13
- Sunnyside 13
- Susanville 13
- Tara Hills 13
- Tarpey Village 13
- Tierra Buena 13
- Valley Springs 13
- Waterford 13
- Winton 13
- Anderson 12
- Aptos Hills-Larkin Valley 12
- Arcata 12
- Auburn 12
- Auburn Lake Trails 12
- Avila Beach 12
- Biola 12
- Blackhawk 12
- Boyes Hot Springs 12
- Bret Harte 12
- Bridgeport 12
- Bystrom 12
- Calabasas 12
- Cambrian Park 12
- Campo 12
- Carpinteria 12
- Caruthers 12
- Castroville 12
- Clay 12
- Clear Lake Riviera 12
- Clearlake Oaks 12
- Cool 12
- Crescent City 12
- Cutler 12
- Davenport 12
- Del Rio 12
- Diamond Springs 12
- Dogtown 12
- El Verano 12
- Fairmead 12
- Florin 12
- Forest Meadows 12
- Foresthill 12
- Freedom 12
- Fruitridge Pocket 12
- Goleta 12
- Greenville 12
- Hermosa Beach 12
- Hidden Valley Lake 12
- Hilmar-Irwin 12
- Idyllwild-Pine Cove 12
- Jamestown 12
- Kerman 12
- Keyes 12
- King City 12
- Laguna Beach 12
- Lake of the Pines 12
- Livingston 12
- Lompoc 12
- Madera Acres 12
- Manhattan Beach 12
- Meadow Vista 12
- Nice 12
- Olympic Valley 12
- Parksdale 12
- Parkwood 12
- Pismo Beach 12
- Placer 12
- Plumas 12
- Rosemead 12
- Rosemont 12
- Salida 12
- San Joaquin Hills 12
- Saranap 12
- Shackelford 12
- Soda Bay 12
- Stanislaus 12
- Sutter 12
- Thermalito 12
- Tustin 12
- Upper Lake 12
- Valencia 12
- Valley Center 12
- Ventura 12
- Vine Hill 12
- Vineyard 12
- West Menlo Park 12
- West Modesto 12
- West Park 12
- Westhaven-Moonstone 12
- Allendale 11
- Alum Rock 11
- Amesti 11
- Arbuckle 11
- August 11
- Bass Lake 11
- Berry Creek 11
- Bethel Island 11
- Blue Lake 11
- Boronda 11
- Burlingame 11
- Camino 11
- Coarsegold 11
- Collierville 11
- Country Club 11
- Covelo 11
- Dixon Lane-Meadow Creek 11
- Dunnigan 11
- Durham 11
- East Foothills 11
- East Quincy 11
- French Camp 11
- Garden Acres 11
- Guadalupe 11
- Gustine 11
- Hartley 11
- Herald 11
- Hoopa 11
- Hornbrook 11
- Humboldt 11
- Interlaken 11
- Kennedy 11
- Kings Beach 11
- Knightsen 11
- Lake Arrowhead 11
- Las Lomas 11
- Lincoln Village 11
- Lockeford 11
- Loyalton 11
- Lucerne Valley 11
- Malibu 11
- Maxwell 11
- Monument Hills 11
- Moorpark 11
- Morada 11
- Mount Shasta 11
- Oroville East 11
- Pajaro 11
- Palermo 11
- Parkway 11
- Penn Valley 11
- Pine Mountain Club 11
- Placerville 11
- Pollock Pines 11
- Poway 11
- Rio Linda 11
- Riverdale Park 11
- Running Springs 11
- San Bruno 11
- Sanger 11
- Seven Trees 11
- Shingletown 11
- Solvang 11
- Stevenson Ranch 11
- Stonyford 11
- Taft 11
- Taft Mosswood 11
- Tahoe Vista 11
- Tehachapi 11
- Thornton 11
- Three Rivers 11
- Waldon 11
- Walnut Grove 11
- Weed 11
- West Bishop 11
- Winters 11
- Yuba 11
- Yuba City 11
- Atwater 10
- Beale Air Force Base 10
- Brentwood 10
- Buckhorn 10
- Butte 10
- Carnelian Bay 10
- Central Valley (historical) 10
- Colfax 10
- Corning 10
- Daly City 10
- Dos Palos 10
- East Palo Alto 10
- Emeryville 10
- Esparto 10
- Fetters Hot Springs-Agua Caliente 10
- Forest Ranch 10
- Fortuna 10
- Georgetown 10
- Gerber 10
- Gualala 10
- Half Moon Bay 10
- Hamilton City 10
- Johnstonville 10
- Kelseyville 10
- La Grange 10
- Lake Nacimiento 10
- Lathrop 10
- Lincoln 10
- Linden 10
- Lodi 10
- Los Olivos 10
- Magalia 10
- Manteca 10
- Mendocino 10
- Murphys 10
- Nevada City 10
- Newman 10
- North Fork 10
- Pine Grove 10
- Port Hueneme 10
- Prather 10
- Rancho Murieta 10
- Redway 10
- Riverdale 10
- Ross 10
- San Francisco 10
- San Juan Bautista 10
- San Luis Obispo 10
- Sonora 10
- South Dos Palos 10
- Thermal 10
- Truckee 10
- Val Verde 10
- Wasco 10
- Yolo 10
- Antioch 9
- Atascadero 9
- Atherton 9
- Avalon 9
- Bayside 9
- Belvedere 9
- Brisbane 9
- Buena Vista 9
- Chualar 9
- Colusa 9
- Corralitos 9
- Discovery Bay 9
- Dixon 9
- Eastvale 9
- El Dorado 9
- Fillmore 9
- Foster City 9
- Fremont 9
- Gonzales 9
- Guerneville 9
- Healdsburg 9
- Hillsborough 9
- Jackson 9
- Lagunitas-Forest Knolls 9
- Larkspur 9
- Live Oak 9
- Los Osos 9
- Lower Lake 9
- Mariposa 9
- Mendota 9
- Mill Valley 9
- Millbrae 9
- Mountain House 9
- Newark 9
- Noe Valley 9
- North Fair Oaks 9
- Oakley 9
- Orleans 9
- Oroville 9
- Quartz Hill 9
- Reedley 9
- Ridgemark 9
- San Anselmo 9
- San Leandro 9
- San Mateo 9
- Santa Maria 9
- Santa Venetia 9
- Santa Ynez 9
- Solana Beach 9
- Strawberry 9
- Trinity 9
- Tulare 9
- Wheatland 9
- Willows 9
- Woodacre 9
- Woodland 9
- Alameda 8
- Amador 8
- Aromas 8
- Bay Point 8
- Belmont 8
- Ben Lomond 8
- Cambria 8
- Chowchilla 8
- Concord 8
- Corte Madera 8
- Dollar Point 8
- Downieville 8
- East Oakdale 8
- Forestville 8
- Highlands-Baywood Park 8
- Inverness 8
- Kentfield 8
- Los Altos 8
- Los Banos 8
- Loyola 8
- Lucas Valley-Marinwood 8
- Lucerne 8
- Martinez 8
- Menlo Park 8
- Mission District 8
- Mono Vista 8
- Montara 8
- Mountain View 8
- Novato 8
- Occidental 8
- Orosi 8
- Palo Alto 8
- Parlier 8
- Phoenix Lake 8
- Pinole 8
- Pioneer 8
- Redwood City 8
- Redwood Valley 8
- Richmond 8
- Rio Del Mar 8
- San Carlos 8
- San Jose 8
- San Rafael 8
- Santa Clara 8
- Santa Clarita 8
- Sea Ranch 8
- South Lake Tahoe 8
- Sunnyvale 8
- Sutter Creek 8
- Tahoe City 8
- Tahoma 8
- Talmage 8
- Tamalpais-Homestead Valley 8
- Temecula 8
- Tiburon 8
- Twin Lakes 8
- Union City 8
- Vacaville 8
- Weaverville 8
- Windsor 8
- Albany 7
- Bella Vista 7
- Benicia 7
- Campbell 7
- Carmichael 7
- Challenge-Brownsville 7
- Citrus Heights 7
- Columbia 7
- Contra Costa Centre 7
- Costa Mesa 7
- Cupertino 7
- Danville 7
- Davis 7
- Dublin 7
- El Cerrito 7
- El Monte 7
- El Sobrante 7
- Elk Grove 7
- Fairfax 7
- Fairfield 7
- Felton 7
- Gilroy 7
- Gold River 7
- Graton 7
- Greenfield 7
- Hayward 7
- Kensington 7
- Lafayette 7
- Lake Wildwood 7
- Lakeport 7
- Larkfield-Wikiup 7
- Loomis 7
- Los Altos Hills 7
- Marin City 7
- Marina 7
- Milpitas 7
- Monte Rio 7
- Newcastle 7
- Oakland 7
- Orinda 7
- Pacheco 7
- Paso Robles 7
- Pittsburg 7
- Pleasant Hill 7
- Pleasanton 7
- Portola Valley 7
- Rancho Calaveras 7
- Rocklin 7
- Roseville 7
- Sacramento 7
- Saint Helena 7
- San Ramon 7
- Santa Cruz 7
- Santa Rosa 7
- Sausalito 7
- Sebastopol 7
- Sonoma 7
- Stockton 7
- Tamalpais Valley 7
- Twain Harte 7
- Walnut Creek 7
- Williams 7
- Woodside 7
- Alamo 6
- Bear Valley Springs 6
- Berkeley 6
- Boulder Creek 6
- Buellton 6
- Calaveras 6
- Calistoga 6
- Carmel-by-the-Sea 6
- Carmel Valley 6
- Castro Valley 6
- Clayton 6
- Cloverdale 6
- Cobb 6
- Copperopolis 6
- El Dorado Hills 6
- Eldridge 6
- Elverta 6
- Emerald Lake Hills 6
- Firebaugh 6
- Granite Bay 6
- Hollister 6
- Kenwood 6
- La Riviera 6
- Ladera 6
- Livermore 6
- Mission Canyon 6
- Monterey 6
- Moraga 6
- Morgan Hill 6
- Napa 6
- Oakdale 6
- Petaluma 6
- Piedmont 6
- Rancho Cordova 6
- Ripon 6
- Rodeo 6
- Rohnert Park 6
- Salinas 6
- Shingle Springs 6
- Sierra 6
- Siskiyou 6
- Soquel 6
- Stanford 6
- Ukiah 6
- Vallejo 6
- Willits 6
- Woodbridge 6
- Ahwahnee 5
- American Canyon 5
- Angels Camp 5
- Angwin 5
- Aptos 5
- Arden-Arcade 5
- Auberry 5
- Black Point-Green Point 5
- Bonny Doon 5
- Brea 5
- Cameron Park 5
- Cotati 5
- Crockett 5
- Day Valley 5
- Del Rey Oaks 5
- East Richmond Heights 5
- Fair Oaks 5
- Fairview 5
- Folsom 5
- Ione 5
- La Selva Beach 5
- Laytonville 5
- Los Gatos 5
- Marin 5
- Penngrove 5
- Point Arena 5
- Potter Valley 5
- Prunedale 5
- San Juan Capistrano 5
- San Marcos 5
- San Martin 5
- Santa Margarita 5
- Saratoga 5
- Scotts Valley 5
- Seaside 5
- Shaver Lake 5
- Soledad 5
- Temelec 5
- Wilton 5
- Bolinas 4
- Boonville 4
- Del Monte Forest 4
- Elkhorn 4
- Galt 4
- Hercules 4
- Hughson 4
- Lexington Hills 4
- Monte Sereno 4
- Moss Beach 4
- North Lakeport 4
- Orangevale 4
- Pacific Grove 4
- Rancho Santa Fe 4
- Watsonville 4
- West Sacramento 4
- Yosemite Lakes 4
- Yountville 4
- Brookdale 3
- Clearlake 3
- Cuyama 3
- Diablo 3
- Montecito 3
- Nashville 3
- Plymouth 3
- Suisun 3
- Burbank 2
- Byron 2
- Midpines 2
- Paicines 2
- Acalanes Ridge 1
- Capitola 1
- Laguna 1
- Laguna Woods 1
- San Miguel 1
- Templeton 1
- Lake San Marcos 0
AQI US, Metric